Systems and methods for a multicarrier modulation system with a variable margin

• US 20060018395A1
• Filed: 10/04/2005
• Published: 01/26/2006
• Est. Priority Date: 04/18/2000
• Status: Abandoned Application

• Current Assignee: Aware Incorporated (Crowley Holdings Preferred LLC)
• Original Assignee: Aware Incorporated (Crowley Holdings Preferred LLC)
• Inventors: Tzannes, Marcos C.
• Application Number:
  US11/242,024
• Publication Number:
  US 20060018395A1
• Time in Patent Office: Days
• US Class Current: 375/260
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0044 allocation of payload
• 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

A multicarrier modem has a plurality of carriers over which data is transmitted. By assigning, foe example, one or more different margins to the individual carriers the data rate and impairment immunity can be increased.

Claims

1-23. -23. (canceled)

24. A method of enhancing multicarrier modulation communication over a plurality of subchannels comprising communicating over the plurality of subchannels using at least two different margins.

25. The method of claim 24, wherein the at least two margins are based on at least one of changes in the levels of a crosstalk, impulse noise, temperature changes, wire line length, radio frequency interference, a bit error rate, a signal to noise ratio, a seasonal change, statistical information, time information, day information and data rate information.

26. The method of claim 24, wherein the at least two margins are at least one of an average margin and a subchannel specific margin.

27. The method of claim 26, wherein the average margin is applied

28. The method of claim 24, further comprising determining at least one margin.

29. The method of claim 24, further comprising storing at least one margin.

30-45. -45. (canceled)