Communication data using wideband communications

• US 7,542,513 B2
• Filed: 08/30/2002
• Issued: 06/02/2009
• Est. Priority Date: 08/31/2001
• Status: Expired due to Fees

• Current Assignee: Adaptive Networks, Inc.
• Original Assignee: Adaptive Networks, Inc.
• Inventors: Saab, Khaled, Propp, Michael B.
• Primary Examiner(s): VO, DON NGUYEN
• Application Number:
  US10/488,179
• Publication Number:
  US 20050063479A1
• Time in Patent Office: 2,468 Days
• Field of Search: 375219-223, 375257-261, 375/298, 375/323, 375/346, 375/349, 375/350
• US Class Current: 375/260
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 2025/03414 Multicarrier
• CPC Class Codes: H04L 2025/03445 Time domain
• CPC Class Codes: H04L 2025/03522 Frequency domain
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling

Abstract

This disclosure relates to varying load and modulation applied to each of multiple frequency subchannels based on anticipated attenuation experienced by those subchannels. Communicating data includes identifying a static component of a transmission medium for wideband communications having at least two subchannels (110), determining a function of noise or attenuation versus frequency for the static component (120), selecting wideband modulation schemes for the subchannels based on the function determined (130), and communicating a data signal over the subchannels (145). The transmission medium includes a medium other than a copper telephone wire between and including a carrier facility and a termination of the copper telephone wire at an access point at a user premise and copper telephone wire in a cable riser in multitenant units and multi-dwelling buildings. Independent demodulation functions may be applied to at least two of the subchannels.

Claims

1. A method for communicating data, the method comprising:

identifying a static component of a transmission medium for wideband communications having at least two subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between a carrier facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings;

determining a function of noise or attenuation versus frequency for the static component;

selecting wideband modulation schemes for the subchannels based on the function determined;

communicating a data signal over the subchannels;

identifying a dynamic component of the transmission medium for the wideband communications;

creating an adaptive filter based on the dynamic component; and

applying the adaptive filter to the communicated data signal at a receiver.

2. The method as in claim 1 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

3. The method as in claim 1 wherein the transmission medium includes a power line.

4. The method as in claim 1 wherein the transmission medium includes a cable line.

5. The method as in claim 1 wherein the transmission medium includes a telephone wire other than a copper telephone wire.

6. The method as in claim 1 wherein the transmission medium includes a radio frequency medium.

7. The method as in claim 1 further comprising independently applying the selected wideband modulation schemes to each of the subchannels.

8. The method as in claim 7 wherein independently applying the selected wideband modulation schemes includes using separate modulators for each of the subchannels to apply the selected modulation schemes.

9. The method as in claim 1 wherein:

identifying the static component includes independently identifying the static component on each of the subchannels;

determining the function includes determining the function of noise or attenuation versus frequency for the static component of each of the subchannels; and

selecting the wideband modulation scheme includes selecting a wideband modulation scheme to optimize throughput on each of the subchannels based on the function determined on each of the subchannels.

10. The method as in claim 1 wherein:

determining the function includes taking a measurement of the noise or attenuation versus frequency at a time interval other than a frame-by-frame time interval and determining the function of the noise or the attenuation versus the frequency for the static component based on the measurement; and

selecting the wideband modulation scheme includes selecting the wideband modulation scheme at a time of the measurement based on the function determined.

11. The method as in claim 1 wherein determining the function includes averaging a function of noise or attenuation versus frequency for the static component over a period of time.

12. The method as in claim 1 wherein the static component includes a noise as a relatively static function of frequency.

13. The method as in claim 1 wherein the static component includes attenuation as a relative static function of frequency.

14. The method as in claim 1 wherein the static component includes noise and attenuation as a relatively static function of frequency.

15. The method as in claim 1 wherein applying the adaptive filter includes applying the adaptive filter to the communicated data signal on each of the subchannels for the wideband communication.

16. The method as in claim 1 wherein the adaptive filter includes a noise filter.

17. The method as in claim 1 wherein the adaptive filter includes a channel filter.

18. The method as in claim 1 wherein the adaptive filter includes a frequency-domain equalizer.

19. The method as in claim 1 wherein the static component is static relative to the dynamic component.

20. The method as in claim 1 wherein the dynamic component includes noise that varies as a function of frequency.

21. The method as in claim 1 wherein the dynamic component includes attenuation that varies as a function of frequency.

22. The method as in claim 1 wherein the dynamic component includes noise and attenuation that vary as a function of frequency.

23. The method as in claim 1 further comprising:

creating a channel filter by averaging elements of the channel filter based on the static component; and

applying the channel filter to the communicated data signal at a receiver.

24. The method as in claim 1 further comprising:

creating a noise filter by averaging elements of the noise filter based on the static component; and

applying the noise filter to the communicated data signal at a receiver.

25. The method as in claim 1 further comprising:

creating a frequency-domain equalizer by averaging elements of the frequency-domain equalizer based on the static component; and

applying the frequency-domain equalizer to the communicated data signal at a receiver.

26. The method as in claim 1 further comprising:

creating a filter by averaging the function of noise versus the frequency; and

applying the filter to the communicated data signal at a receiver.

27. The method as in claim 1 further comprising:

creating a filter by averaging the function of attenuation versus the frequency; and

applying the filter to the communicated data signal at a receiver.

28. The method as in claim 1 further comprising:

creating a filter by averaging the function of noise and attenuation versus the frequency; and

applying the filter to the communicated data signal at a receiver.

29. The method as in claim 1 further comprising applying independent demodulation functions for at least two of the subchannels.

30. The method as in claim 29 wherein applying independent demodulation functions includes using a separate demodulator for the at least two subchannels to apply the demodulations functions.

31. The method as in claim 29 wherein applying independent demodulation functions includes applying separate demodulation algorithms for the at least two subchannels.

32. The method as in claim 1 wherein selecting the wideband modulation schemes includes selecting wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.

33. The method as in claim 32 wherein the modulation schemes include offset quadrature amplitude modulation (OQAM) schemes.

34. The method as in claim 1 further comprising selecting a forward error correction code based on a length of a frame and a rate of retransmission.

35. The method as in claim 1 further comprising selecting an error detection code to determine a level of error detection and a rate of retransmission.

36. The method as in claim 1 further comprising attaching to new data an acknowledgement for a retransmission of previously transmitted data communicated across the transmission medium.

37. The method as in claim 36 wherein attaching to the new data includes attaching to the new data a data block that requires retransmission.

38. The method as in claim 1 further comprising attaching to new data an acknowledgement for correct reception of previously transmitted data communicated across the transmission medium.

39. A system for communicating data, comprising:

a processor module that is structured and arranged to;

identify a static component of a transmission medium for wideband communications having at least two subchannels,

determine a function of noise or attenuation versus frequency for the static component,

select wideband modulation schemes for the subchannels based on the function determined, and

identify a dynamic component of the transmission medium for the wideband communications;

a transmit module that is structured and arranged to communicate a data signal over the subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between a carrier facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings; and

an adaptive filter that is created based on the dynamic component and applied to the communicated data signal at a receiver.

40. The system of claim 39 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

41. The system of claim 39 wherein the transmission medium includes a power line.

42. The system of claim 39 wherein the transmission medium includes a cable line.

43. The system of claim 39 wherein the transmission medium includes a telephone wire other than a copper telephone wire.

44. The system of claim 39 wherein the transmission medium includes a radio frequency medium.

45. The system of claim 39 further comprising a modulator module having one or more modulators that are structured and arranged to independently apply the selected wideband modulation schemes to each of the subchannels.

46. The system of claim 45 wherein the modulator module uses separate modulators for each of the subchannels to apply the selected modulation schemes.

47. The system of claim 39 wherein the processor is structured and arranged to:

independently identify the static component on each of the subchannels;

determine the function of noise or attenuation versus frequency for the static component of each of the subchannels; and

select a wideband modulation scheme to optimize throughput on each of the subchannels based on the function determined on each of the subchannels.

48. The system of claim 39 wherein the processor is structured and arranged to:

take a measurement of the noise or attenuation versus frequency at a time interval other than a frame-by-frame time interval and determine the function of the noise or the attenuation versus the frequency for the static component based on the measurement; and

select the wideband modulation scheme at a time of the measurement based on the function determined.

49. The system of claim 39 wherein the processor is structured and arranged to average a function of noise or attenuation versus frequency for the static component over a period of time.

50. The system of claim 39 wherein the static component includes noise as a relatively static function of frequency.

51. The system of claim 39 wherein the static component includes attenuation as a relatively static function of frequency.

52. The system of claim 39 wherein the static component includes noise and attenuation as a relatively static function of frequency.

53. The system of claim 39 wherein the adaptive filter is applied to the communicated data signal on each of the subchannels for the wideband communication.

54. The system of claim 39 wherein the adaptive filter includes a noise filter.

55. The system of claim 39 wherein the adaptive filter includes a channel filter.

56. The system of claim 39 wherein the adaptive filter includes a frequency-domain equalizer.

57. The system of claim 39 wherein the static component is static relative to the dynamic component.

58. The system of claim 39 wherein the dynamic component includes noise that varies as a function of frequency.

59. The system of claim 39 wherein the dynamic component includes attenuation that varies as a function of frequency.

60. The system of claim 39 wherein the dynamic component includes noise and attenuation that vary as a function of frequency.

61. The system of claim 39 further comprising a channel filter that is created by averaging elements of the channel filter based on the static component and applied to the communicated data signal at a receiver.

62. The system of claim 39 further comprising a noise filter that is created by averaging elements of the noise filter based on the static component and applied to the communicated data signal at a receiver.

63. The system of claim 39 further comprising a frequency-domain equalizer that is created by averaging elements of the frequency-domain equalizer based on the static component and applied to the communicated data signal at a receiver.

64. The system of claim 39 further comprising a filter that is created by averaging the function of noise versus the frequency and applied to the communicated data signal at a receiver.

65. The system of claim 39 further comprising a filter that is created by averaging the function of attenuation versus the frequency and applied to the communicated data signal at a receiver.

66. The system of claim 39 further comprising a filter that is created by averaging the function of noise and attenuation versus the frequency and applied to the communicated data signal at a receiver.

67. The system of claim 39 further comprising a demodulator module having one or more demodulators that are structured and arranged to apply independent demodulation functions for at least two of the subchannels.

68. The system of claim 67 wherein the demodulator module is structured and arranged to using separate demodulators for the at least two subchannels to apply the demodulations functions.

69. The system of claim 67 wherein the demodulator module is structured and arranged to apply separate demodulation algorithms for the at least two subchannels.

70. The system of claim 39 wherein the processor is structured and arranged to select wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.

71. The system of claim 70 wherein the modulation schemes include offset quadrature amplitude modulation (OQAM) schemes.

72. The system of claim 39 further comprising an error correction module that is structured and arranged to select a forward error correction code based on a length of a frame and a rate of retransmission.

73. The system of claim 39 further comprising an error detection module that is structured and arranged to select an error detection code to determine a level of error detection and a rate of retransmission.

74. The system of claim 39 wherein the processor is structured and arranged to attach to new data an acknowledgement for a retransmission of previously transmitted data communicated across the transmission medium.

75. The system of claim 74 wherein the processor is structured and arranged to attach to the new data a data block that requires retransmission.

76. The system of claim 39 wherein the processor is structured and arranged to attach to new data an acknowledgement for correct reception of previously transmitted data communicated across the transmission medium.

77. A system for communicating data, comprising:

means for identifying a static component of a transmission medium for wideband communications having at least two subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between a carrier facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings;

means for determining a function of noise or attenuation versus frequency for the static component;

means for selecting wideband modulation schemes for the subchannels based on the function determined;

means for communicating a data signal over the subchannels,

means for identifying a dynamic component of the transmission medium for the wideband communications;

means for creating an adaptive filter based on the dynamic component; and

means for applying the adaptive filter to the communicated data signal at a receiver.

78. The system of claim 77 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

79. The system of claim 77 wherein the transmission medium includes a power line.

80. The system of claim 77 wherein the transmission medium includes a cable line.

81. The system of claim 77 wherein the transmission medium includes a telephone wire other than a copper telephone wire.

82. The system of claim 77 wherein the transmission medium includes a radio frequency medium.

83. The system of claim 77 further comprising means for independently applying the selected wideband modulation schemes to each of the subchannels.

84. The system of claim 83 wherein the means for independently applying the selected wideband modulation schemes includes means for using separate modulators for each of the subchannels to apply the selected modulation schemes.

85. The system of claim 77 wherein:

the means for identifying the static component includes means for independently identifying the static component on each of the subchannels;

the means for determining the function includes means for determining the function of noise or attenuation versus frequency for the static component of each of the subchannels; and

the means for selecting the wideband modulation scheme includes means for selecting a wideband modulation scheme to optimize throughput on each of the subchannels based on the function determined on each of the subchannels.

86. The system of claim 77 wherein:

the means for determining the function includes means for taking a measurement of the noise or attenuation versus frequency at a time interval other than a frame-by-frame time interval and means for determining the function of the noise or the attenuation versus the frequency for the static component based on the measurement; and

the means for selecting the wideband modulation scheme includes means for selecting the wideband modulation scheme at a time of the measurement based on the function determined.

87. The system of claim 77 wherein the means for determining the function includes means for averaging a function of noise or attenuation versus frequency for the static component over a period of time.

88. The system of claim 77 wherein the static component includes noise as a relatively static function of frequency.

89. The system of claim 77 wherein the static component includes attenuation as a relatively static function of frequency.

90. The system of claim 77 wherein the static component includes noise and attenuation as a relatively static function of frequency.

91. The system of claim 77 wherein the means for applying the adaptive filter includes means for applying the adaptive filter to the communicated data signal on each of the subchannels for the wideband communication.

92. The system of claim 77 wherein the adaptive filter includes a noise filter.

93. The system of claim 77 wherein the adaptive filter includes a channel filter.

94. The system of claim 77 wherein the adaptive filter includes a frequency-domain equalizer.

95. The system of claim 77 wherein the static component is static relative to the dynamic component.

96. The system of claim 77 wherein the dynamic component includes noise that varies as a function of frequency.

97. The system of claim 77 wherein the dynamic component includes attenuation that varies as a function of frequency.

98. The system of claim 77 wherein the dynamic component includes noise and attenuation that vary as a function of frequency.

99. The system of claim 77 further comprising:

means for creating a channel filter by averaging elements of the channel filter based on the static component; and

means for applying the channel filter to the communicated data signal at a receiver.

100. The system of claim 77 further comprising:

means for creating a noise filter by averaging elements of the noise filter based on the static component; and

means for applying the noise filter to the communicated data signal at a receiver.

101. The system of claim 77 further comprising:

means for creating a frequency-domain equalizer by averaging elements of the frequency-domain equalizer based on the static component; and

means for applying the frequency-domain equalizer to the communicated data signal at a receiver.

102. The system of claim 77 further comprising:

means for creating a filter by averaging the function of noise versus the frequency; and

means for applying the filter to the communicated data signal at a receiver.

103. The system of claim 77 further comprising:

means for creating a filter by averaging the function of attenuation versus the frequency; and

means for applying the filter to the communicated data signal at a receiver.

104. The system of claim 77 further comprising:

means for creating a filter by averaging the function of noise and attenuation versus the frequency; and

means for applying the filter to the communicated data signal at a receiver.

105. The system of claim 77 further comprising means for applying independent demodulation functions for at least two of the subchannels.

106. The system of claim 105 wherein the means for applying independent demodulation functions includes means for using a separate demodulator for the at least two subchannels to apply the demodulations functions.

107. The system of claim 105 wherein the means for applying independent demodulation functions includes means for applying separate demodulation algorithms for the at least two subchannels.

108. The system of claim 77 wherein the means for selecting the wideband modulation schemes includes means for selecting wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.

109. The system of claim 108 wherein the modulation schemes include offset quadrature amplitude modulation (OQAM) schemes.

110. The system of claim 77 further comprising means for selecting a forward error correction code based on a length of a frame and a rate of retransmission.

111. The system of claim 77 further comprising means for selecting an error detection code to determine a level of error detection and a rate of retransmission.

112. The system of claim 77 further comprising means for attaching to new data an acknowledgement for a retransmission of previously transmitted data communicated across the transmission medium.

113. The system of claim 112 wherein the means for attaching includes means for attaching to the new data a data block that requires retransmission.

114. The system of claim 77 further comprising means for attaching to new data an acknowledgement for correct reception of previously transmitted data communicated across the transmission medium.

115. A tangible computer readable medium having embodied thereon a computer program configured to communicate data, the computer program comprising:

a processor code segment that causes a computer to;

identify a static component of a transmission medium for wideband communications having at least two subchannels,

determine a function of noise or aft attenuation versus frequency for the static component,

select wideband modulation schemes for the subchannels based on the function determined, and

identify a dynamic component of the transmission medium for the wideband communications;

a transmit code segment that causes the computer to communicate a data signal over the subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between a carrier facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings; and

an adaptive filter code segment that causes the computer to create an adaptive filter based on the dynamic component and apply the adaptive filter to the communicated data signal at a receiver.

116. The medium of claim 115 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

117. The medium of claim 115 wherein the transmission medium includes a power line.

118. The medium of claim 115 wherein the transmission medium includes a cable line.

119. The medium of claim 115 wherein the transmission medium includes a telephone wire other than a copper telephone wire.

120. The medium of claim 115 wherein the transmission medium includes a radio frequency medium.

121. The medium of claim 115 further comprising a modulator code segment that causes the computer to independently apply the selected wideband modulation schemes to each of the subchannels.

122. The medium of claim 121 wherein the modulator code segment causes the computer to use separate modulators for each of the subchannels to apply the selected modulation schemes.

123. The medium of claim 115 wherein the processor code segment causes the computer to:

independently identify the static component on each of the subchannels;

determine the function of noise or attenuation versus frequency for the static component of each of the subchannels; and

select a wideband modulation scheme to optimize throughput on each of the subchannels based on the function determined on each of the subchannels.

124. The medium of claim 115 wherein the processor code segment causes the computer to:

take a measurement of the noise or attenuation versus frequency at a time interval other than a frame-by-frame time interval and determine the function of the noise or the attenuation versus the frequency for the static component based on the measurement; and

select the wideband modulation scheme at a time of the measurement based on the function determined.

125. The medium of claim 115 wherein the processor code segment causes the computer to average a function of noise or attenuation versus frequency for the static component over a period of time.

126. The medium of claim 115 wherein the static component includes noise as a relatively static function of frequency.

127. The medium of claim 115 wherein the static component includes attenuation as a relatively static function of frequency.

128. The medium of claim 115 wherein the static component includes noise and attenuation as a relatively static function of frequency.

129. The medium of claim 115 wherein the adaptive filter code segment causes the computer to apply the adaptive filter to the communicated data signal on each of the subchannels for the wideband communication.

130. The medium of claim 115 wherein the adaptive filter includes a noise filter.

131. The medium of claim 115 wherein the adaptive filter includes a channel filter.

132. The medium of claim 115 wherein the adaptive filter includes a frequency-domain equalizer.

133. The medium of claim 115 wherein the static component is static relative to the dynamic component.

134. The medium of claim 115 wherein the dynamic component includes noise that varies as a function of frequency.

135. The medium of claim 115 wherein the dynamic component includes attenuation that varies as a function of frequency.

136. The medium of claim 115 wherein the dynamic component includes noise and attenuation that vary as a function of frequency.

137. The medium of claim 115 further comprising a channel filter code segment that causes the computer to create a channel filter by averaging elements of the channel filter based on the static component and apply the channel filter to the communicated data signal at a receiver.

138. The medium of claim 115 further comprising a noise filter code segment that causes the computer to create a noise filter by averaging elements of the noise filter based on the static component and apply the noise filter to the communicated data signal at a receiver.

139. The medium of claim 115 further comprising a frequency-domain equalizer code segment that causes the computer to create a frequency-domain equalizer by averaging elements of the frequency-domain equalizer based on the static component and apply the frequency-domain equalizer to the communicated data signal at a receiver.

140. The medium of claim 115 further comprising a filter code segment that causes the computer to create a filter by averaging the function of noise versus the frequency and apply the filter to the communicated data signal at a receiver.

141. The medium of claim 115 further comprising a filter code segment that causes the computer to create a filter by averaging the function of attenuation versus the frequency and apply the filter to the communicated data signal at a receiver.

142. The medium of claim 115 further comprising a filter code segment that causes the computer to create a filter by averaging the function of noise and attenuation versus the frequency and apply the filter to the communicated data signal at a receiver.

143. The medium of claim 115 further comprising a demodulator code segment that causes the computer to apply independent demodulation functions for at least two of the subchannels.

144. The medium of claim 143 wherein the demodulator code segment causes the computer to use separate demodulators for the at least two subchannels to apply the demodulations functions.

145. The medium of claim 143 wherein the demodulator code segment causes the computer to apply separate demodulation algorithms for the at least two subchannels.

146. The medium of claim 115 wherein the processor code segment causes the computer to select wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.

147. The medium of claim 146 wherein the modulation schemes include offset quadrature amplitude modulation (OQAM) schemes.

148. The medium of claim 115 further comprising an error correction code segment that causes the computer to select a forward error correction code based on a length of a frame and a rate of retransmission.

149. The medium of claim 115 further comprising an error detection code segment that causes the computer to select an error detection code to determine a level of error detection and a rate of retransmission.

150. The medium of claim 115 wherein the processor code segment causes the computer to attach to new data an acknowledgement for a retransmission of previously transmitted data communicated across the transmission medium.

151. The medium of claim 150 wherein the processor code segment causes the computer to attach to the new data a data block that requires retransmission.

152. The medium of claim 115 wherein the processor code segment causes the computer to attach to new data an acknowledgement for correct reception of previously transmitted data communicated across the transmission medium.

153. A method for communicating data, the method comprising:

identifying a static component of a transmission medium for wideband communications having at least two subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between a carrier facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings;

measuring noise or attenuation versus frequency for the static component at a time interval other than a frame-by-frame time interval;

determining a function of the noise or attenuation versus frequency for the static component based on the measurement;

selecting wideband modulation schemes for the subchannels at a time of the measurement based on the function determined; and

communicating a data signal over the subchannels.

154. The method as in claim 153 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

155. The method as in claim 153 wherein the transmission medium includes one or more of a power line, a cable line, a telephone wire other than a copper telephone wire, and a radio frequency medium.

156. The method as in claim 153 further comprising independently applying the selected wideband modulation schemes to each of the subchannels.

157. The method as in claim 153 wherein determining the function includes averaging a function of noise or attenuation versus frequency for the static component over a period of time.

158. The method as in claim 153 wherein selecting the wideband modulation schemes includes selecting wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.

159. The method as in claim 153 further comprising selecting an error detection code to determine a level of error detection and a rate of retransmission.

160. The method as in claim 153 further comprising attaching to new data an acknowledgement for a retransmission of previously transmitted data communicated across the transmission medium.

161. The method as in claim 153 further comprising attaching to new data an acknowledgement for correct reception of previously transmitted data communicated across the transmission medium.

162. A system for communicating data, comprising:

a processor module that is structured and arranged to;

identify a static component of a transmission medium for wideband communications having at least two subchannels,

measure noise or attenuation versus frequency for the static component at a time interval other than a frame-by-frame time interval,

determine a function of the noise or attenuation versus frequency for the static component for the static component based on the measurement, and

select wideband modulation schemes for the subchannels based on the function determined; and

a transmit module that is structured and arranged to communicate a data signal over the subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between a carrier facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings.

163. The system of claim 162 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

164. The system of claim 162 wherein the transmission medium includes one or more of a power line, a cable line, a telephone wire other than a copper telephone wire, and a radio frequency medium.

165. The system of claim 162 further comprising a modulator module having one or more modulators that are structured and arranged to independently apply the selected wideband modulation schemes to each of the subchannels.

166. The system of claim 162 wherein the processor is structured and arranged to average a function of noise or attenuation versus frequency for the static component over a period of time.

167. The system of claim 162 wherein the processor is structured and arranged to select wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.

168. The system of claim 162 further comprising an error detection module that is structured and arranged to select an error detection code to determine a level of error detection and a rate of retransmission.

169. The system of claim 162 wherein the processor is structured and arranged to attach to new data an acknowledgement for a retransmission of previously transmitted data communicated across the transmission medium.

170. The system of claim 162 wherein the processor is structured and arranged to attach to new data an acknowledgement for correct reception of previously transmitted data communicated across the transmission medium.

171. A system for communicating data, comprising:

means for identifying a static component of a transmission medium for wideband communications having at least two subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between a carrier facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings;

means for measuring the noise or attenuation versus frequency for the static component at a time interval other than a frame-by-frame time interval;

means for determining a function of noise or attenuation versus frequency for the static component based on the measurement;

means for selecting wideband modulation schemes for the subchannels at a time of the measurement based on the function determined; and

means for communicating a data signal over the subchannels.

172. The system of claim 171 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

173. The system of claim 171 wherein the transmission medium includes one or more of a power line, a cable line, a telephone wire other than a copper telephone wire, and a radio frequency medium.

174. The system of claim 171 further comprising means for independently applying the selected wideband modulation schemes to each of the subchannels.

175. The system of claim 171 wherein the means for determining the function includes means for averaging a function of noise or attenuation versus frequency for the static component over a period of time.

176. The system of claim 171 wherein the means for selecting the wideband modulation schemes includes means for selecting wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.

177. The system of claim 171 further comprising means for selecting an error detection code to determine a level of error detection and a rate of retransmission.

178. The system of claim 171 further comprising means for attaching to new data an acknowledgement for a retransmission of previously transmitted data communicated across the transmission medium.

179. The system of claim 171 further comprising means for attaching to new data an acknowledgement for correct reception of previously transmitted data communicated across the transmission medium.

184. The medium of claim 171 wherein the processor code segment causes the computer to average a function of noise or attenuation versus frequency for the static component over a period of time.

185. The medium of claim 171 wherein the processor code segment causes the computer to select wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.

186. The medium of claim 171 further comprising an error detection code segment that causes the computer to select an error detection code to determine a level of error detection and a rate of retransmission.

187. The medium of claim 171 wherein the processor code segment causes the computer to attach to new data an acknowledgement for a retransmission of previously transmitted data communicated across the transmission medium.

188. The medium of claim 171 wherein the processor code segment causes the computer to attach to new data an acknowledgement for correct reception of previously transmitted data communicated across the transmission medium.

180. A tangible computer readable medium having embodied thereon a computer program configured to communicate data, the computer program comprising:

a processor code segment that causes the computer to;

identify a static component of a transmission medium for wideband communications having at least two subchannels,

measure noise or attenuation versus frequency for the static component at a time interval other than a frame-by-frame time interval,

determine a function of the noise or attenuation versus frequency for the static component based on the measurement, and

select wideband modulation schemes for the subchannels based on the function determined; and

a transmit code segment that causes the computer to communicate a data signal over the subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between and including a carrier facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings.

181. The medium of claim 180 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

182. The medium of claim 180 wherein the transmission medium includes one or more of a power line, a cable line, a telephone wire other than a copper telephone wire, and a radio frequency medium.

183. The medium of claim 180 further comprising a modulator code segment that causes the computer to independently apply the selected wideband modulation schemes to each of the subchannels.

189. A method for communicating data, the method comprising:

identifying a static component of a transmission medium for wideband communications having at least two subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between a carrier facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings;

determining a function of noise or attenuation versus frequency for the static component;

selecting wideband modulation schemes for the subchannels based on the function determined;

communicating a data signal over the subchannels;

creating a frequency-domain equalizer by averaging elements of the frequency-domain equalizer based on the static component; and

applying the frequency-domain equalizer to the communicated data signal at a receiver.

190. The method as in claim 189 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

191. The method as in claim 189 wherein the transmission medium includes one or more of a power line, a cable line, a telephone wire other than a copper telephone wire, and a radio frequency medium.

192. The method as in claim 189 further comprising independently applying the selected wideband modulation schemes to each of the subchannels.

193. The method as in claim 189 wherein determining the function includes averaging a function of noise or attenuation versus frequency for the static component over a period of time.

194. The method as in claim 189 wherein selecting the wideband modulation schemes includes selecting wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.

195. The method as in claim 189 further comprising selecting an error detection code to determine a level of error detection and a rate of retransmission.

196. The method as in claim 189 further comprising attaching to new data an acknowledgement for a retransmission of previously transmitted data communicated across the transmission medium.

197. The method as in claim 189 further comprising attaching to new data an acknowledgement for correct reception of previously transmitted data communicated across the transmission medium.

198. A system for communicating data, comprising:

a processor module that is structured and arranged to;

identify a static component of a transmission medium for wideband communications having at least two subchannels,

determine a function of noise or attenuation versus frequency for the static component, and

select wideband modulation schemes for the subchannels based on the function determined;

a transmit module that is structured and arranged to communicate a data signal over the subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between a carrier facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings; and

a frequency-domain equalizer that is created by averaging elements of the frequency-domain equalizer based on the static component and applied to the communicated data signal at a receiver.

199. The system of claim 198 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

200. The system of claim 198 wherein the transmission medium includes one or more of a power line, a cable line, a telephone wire other than a copper telephone wire, and a radio frequency medium.

201. The system of claim 198 further comprising a modulator module having one or more modulators that are structured and arranged to independently apply the selected wideband modulation schemes to each of the subchannels.

202. The system of claim 198 wherein the processor is structured and arranged to average a function of noise or attenuation versus frequency for the static component over a period of time.

203. The system of claim 198 wherein the processor is structured and arranged to select wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.

204. The system of claim 198 further comprising an error detection module that is structured and arranged to select an error detection code to determine a level of error detection and a rate of retransmission.

205. The system of claim 198 wherein the processor is structured and arranged to attach to the new data a data block that requires retransmission.

206. The system of claim 198 wherein the processor is structured and arranged to attach to new data an acknowledgement for correct reception of previously transmitted data communicated across the transmission medium.

207. A system for communicating data, comprising:

means for identifying a static component of a transmission medium for wideband communications having at least two subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between a cater facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings;

means for determining a function of noise or attenuation versus frequency for the static component;

means for selecting wideband modulation schemes for the subchannels based on the function determined;

means for communicating a data signal over the subchannels;

means for creating a frequency-domain equalizer by averaging elements of the frequency-domain equalizer based on the static component; and

means for applying the frequency-domain equalizer to the communicated data signal at a receiver.

208. The system of claim 207 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

209. The system of claim 207 wherein the transmission medium includes one or more of a power line, a cable line, a telephone wire other than a copper telephone wire, and a radio frequency medium.

210. The system of claim 207 further comprising means for independently applying the selected wideband modulation schemes to each of the subchannels.

211. The system of claim 207 wherein the means for determining the function includes means for averaging a function of noise or attenuation versus frequency for the static component over a period of time.

212. The system of claim 207 wherein the means for selecting the wideband modulation schemes includes means for selecting wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.

213. The system of claim 207 further comprising means for selecting an error detection code to determine a level of error detection and a rate of retransmission.

214. The system of claim 207 further comprising means for attaching to new data an acknowledgement for a retransmission of previously transmitted data communicated across the transmission medium.

215. The system of claim 207 further comprising means for attaching to new data an acknowledgement for correct reception of previously transmitted data communicated across the transmission medium.

216. A tangible computer readable medium having embodied thereon a computer program configured to communicate data, the computer program comprising:

a processor code segment that causes the computer to;

identify a static component of a transmission medium for wideband communications having at least two subchannels,

determine a function of noise or attenuation versus frequency for the static component, and

select wideband modulation schemes for the subchannels based on the function determined;

a transmit code segment that causes the computer to communicate a data signal over the subchannels, wherein the transmission medium includes a medium other than a copper telephone wire between a carrier facility and termination of copper telephone wire at an access point at a user premise, and copper telephone wire in a cable riser in multi-tenant units and multi-dwelling buildings; and

a frequency-domain equalizer code segment that causes the computer to create a frequency-domain equalizer by averaging elements of the frequency-domain equalizer based on the static component and apply the frequency-domain equalizer to the communicated data signal at a receiver.

217. The medium of claim 216 wherein the transmission medium includes copper telephone wire between the termination of the copper telephone wire at the access point at the user premise and termination of copper telephone wire within the user premise.

218. The medium of claim 216 wherein the transmission medium includes one or more of a power line, a cable line, a telephone wire other than a copper telephone wire, and a radio frequency medium.

219. The medium of claim 216 further comprising a modulator code segment that causes the computer to independently apply the selected wideband modulation schemes to each of the subchannels.

220. The medium of claim 216 wherein the processor code segment causes the computer to average a function of noise or attenuation versus frequency for the static component over a period of time.

221. The medium of claim 216 wherein the processor code segment causes the computer to select wideband modulation schemes for the at least two subchannels to optimize orthogonality between each of the subchannels.