SYSTEM AND METHOD OF PUNCTURING PULSES IN A RECEIVER OR TRANSMITTER

• US 20100005371A1
• Filed: 07/17/2008
• Published: 01/07/2010
• Est. Priority Date: 07/07/2008
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Ekbal, Amal, Julian, David Jonathan, Shi, Jun
• Granted Patent: US 8,375,261 B2
• Time in Patent Office: Days
• US Class Current: 714/790
• CPC Class Codes: H03M 13/2936 comprising an outer Reed-Solomon code and an inner convolutional code
• CPC Class Codes: H03M 13/353 Adaptation to the channel
• CPC Class Codes: H03M 13/6362 by puncturing
• CPC Class Codes: H03M 13/6508 Flexibility, adaptability, parametrability and configurability of the implementation
• CPC Class Codes: H04B 1/7163 using impulse radio
• CPC Class Codes: H04B 2001/6908 using time hopping
• CPC Class Codes: H04L 1/0013 Rate matching, e.g. puncturing or repetition of code symbols
• CPC Class Codes: H04L 1/0046 Code rate detection or code type detection H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091
• CPC Class Codes: H04L 1/0068 by puncturing

Abstract

An apparatus for data communication that receives a plurality of pulses from a remote communications device, determines a pulse puncturing rate based on the pulses, and punctures or discards subsequent pulses based on the pulse puncturing rate. During intervals when punctured pulses are expected, the apparatus operates in a lower power consumption mode for the purpose of conserving power. In another aspect, a receiving apparatus determines the pulse puncturing rate based on received pulses, and transmits the pulse puncturing rate information to a transmitting apparatus. In response, the transmitting apparatus sends a subset of the pulses it would have transmitted based on the pulse puncturing rate. Because the receiving apparatus receives fewer pulses (e.g., a subset), the receiving apparatus may operate in a lower power consumption mode for longer periods in order to conserve power. Similarly, because the transmitting apparatus sends fewer pulses, it may also operate in a lower power consumption mode for longer periods.

Claims

1. A method of data communication, comprising:

determining a pulse puncturing rate; and

receiving pulses based on the pulse puncturing rate.

2. The method of claim 1, further comprising puncturing pulses based on the pulse puncturing rate.

3. The method of claim 1, further comprising operating a receiver of the pulses in a relatively low power mode based on the pulse puncturing rate.

4. The method of claim 1, further comprising transmitting information related to the pulse puncturing rate to a communication device.

5. The method of claim 4, wherein receiving pulses comprises receiving pulses from the communication device.

6. The method of claim 1, wherein determining the pulse puncturing rate comprises:

receiving information related to initial pulses;

determining one or more characteristics based on the information related to the initial pulses; and

determining the pulse puncturing rate based on the one or more characteristics.

7. The method of claim 6, wherein the one or more characteristics comprise at least one of a symbol error rate or a symbol erasure rate.

8. The method of claim 6, wherein generating the information related to the initial pulses comprises performing a Viterbi decoding and convolutional encoding based on the initial pulses.

9. The method of claim 6, wherein generating the information related to the initial pulses comprises performing a Viterbi decoding, Reed-Solomon decoding, Reed-Solomon encoding, and convolutional encoding based on the initial pulses.

10. The method of claim 6, wherein generating the information related to the initial pulses comprises:

substantially squaring the initial pulses to generate a first signal;

filtering the first signal to generate a second signal; and

slicing the second signal to generate a third signal from which the information related to the initial pulses is determined.

11. The method of claim 6, wherein determining the pulse puncturing rate comprises performing a table look up or an equation operation using the one or more characteristics.

12. The method of claim 6, further comprising continually determining one or more characteristics related to successive pulses to continually update the pulse puncturing rate.

13. The method of claim 12, further comprising selecting a number of successive pulses used in determining the updated pulse puncturing rate to achieve a defined resolution for the updated pulse puncturing rate or a defined processing time for determining the updated pulse puncturing rate.

14. The method of claim 6, wherein determining the pulse puncturing rate comprises selecting a number of the initial pulses used in determining the pulse puncturing rate to achieve a defined resolution for the pulse puncturing rate or a defined processing time for determining the pulse puncturing rate.

15. An apparatus for data communication, comprising:

a pulse puncturing module adapted to determine a pulse puncturing rate; and

a receiver adapted to receive pulses based on the pulse puncturing rate.

16. The apparatus of claim 15, wherein the receiver is adapted to puncture pulses based on the pulse puncturing rate.

17. The apparatus of claim 15, wherein the receiver is adapted to operate in a relatively low power mode based on the pulse puncturing rate.

18. The apparatus of claim 15, further comprising a transmitter adapted to transmit information related to the pulse puncturing rate to a communication device.

19. The apparatus of claim 18, wherein the receiver is adapted to receive pulses from the communication device.

20. The apparatus of claim 15, wherein the pulse puncturing module is adapted to determine the pulse puncturing rate by:

receiving information related to initial pulses;

determining one or more characteristics based on the information related to the initial pulses; and

determining the pulse puncturing rate based on the one or more characteristics.

21. The apparatus of claim 20, wherein the one or more characteristics comprise at least one of a symbol error rate or a symbol erasure rate.

22. The apparatus of claim 20, wherein the receiver is adapted to generate the information related to the initial pulses by performing a Viterbi decoding and convolutional encoding based on the initial pulses.

23. The apparatus of claim 20, wherein the receiver is adapted to generate the information related to the initial pulses by performing a Viterbi decoding, Reed-Solomon decoding, Reed-Solomon encoding, and convolutional encoding based on the initial pulses.

24. The apparatus of claim 20, wherein the receiver is adapted to:

substantially square the initial pulses to generate a first signal;

filter the first signal to generate a second signal; and

slice the second signal to generate a third signal from which the information related to the initial pulses is determined.

25. The apparatus of claim 20, wherein the pulse puncturing module is adapted to determine the pulse puncturing rate by performing a table look up or an equation operation using the one or more characteristics.

26. The apparatus of claim 20, wherein the pulse puncturing module is adapted to continually determine one or more characteristics of successive pulses to continually update the pulse puncturing rate.

27. The apparatus of claim 26, wherein the pulse puncturing module is adapted to select a number of successive pulses used in determining a new pulse puncturing rate to achieve a defined resolution for the new pulse puncturing rate or a defined processing time for determining the new pulse puncturing rate.

28. The apparatus of claim 20, wherein the pulse puncturing module is adapted to select a number of initial pulses used in determining the pulse puncturing rate to achieve a defined resolution for the pulse puncturing rate or a defined processing time for determining the pulse puncturing rate.

29. An apparatus for data communication, comprising:

means for determining a pulse puncturing rate; and

means for receiving pulses based on the pulse puncturing rate.

30. The apparatus of claim 29, further comprising means for puncturing pulses based on the pulse puncturing rate.

31. The apparatus of claim 29, wherein the receiving means is adapted to operate in a relatively low power mode based on the pulse puncturing rate.

32. The apparatus of claim 29, further comprising means for transmitting information related to the pulse puncturing rate to a communication device.

33. The apparatus of claim 32, wherein the receiving means is adapted to receive pulses from the communication device.

34. The apparatus of claim 29, wherein the pulse puncturing rate determining means comprises:

means for receiving information related to initial pulses;

means for determining one or more characteristics based on the information related to the initial pulses; and

means for determining the pulse puncturing rate based on the one or more characteristics.

35. The apparatus of claim 34, wherein the one or more characteristics comprise at least one of a symbol error rate or a symbol erasure rate.

36. The apparatus of claim 34, wherein the receiving means comprises means for performing a Viterbi decoding and convolutional encoding based on the initial pulses.

37. The apparatus of claim 34, wherein the receiving means comprises means for performing a Viterbi decoding, Reed-Solomon decoding, Reed-Solomon encoding operation, and convolutional encoding based on the initial pulses.

38. The apparatus of claim 34, wherein the receiving means comprises:

means for substantially squaring the initial pulses to generate a first signal;

means for filtering the first signal to generate a second signal; and

means for slicing the second signal to generate a third signal from which the pulse puncturing rate is determined.

39. The apparatus of claim 34, wherein the pulse puncturing rate determining means comprises means for performing a table look up or an equation operation using information related to the initial pulses.

40. The apparatus of claim 29, wherein the pulse puncturing rate determining means is adapted to continually update the pulse puncturing rate based on successive pulses.

41. The apparatus of claim 40, wherein the pulse puncturing rate determining means comprises means for selecting a number of successive pulses used in determining a new pulse puncturing rate to achieve a defined resolution for the new pulse puncturing rate or a defined processing time for determining the new pulse puncturing rate.

42. The apparatus of claim 34, wherein the pulse puncturing rate determining means comprises means for selecting a number of the pulses used in determining the pulse puncturing rate to achieve a defined resolution for the pulse puncturing rate or a defined processing time for determining the pulse puncturing rate.

43. A computer program product for data communications comprising a computer readable medium including codes executable to:

determine a pulse puncturing rate; and

control a power consumption of a receiver based on the pulse puncturing rate.

44. A headset, comprising:

a first module adapted to determine a pulse puncturing rate;

a second module adapted to receive pulses based on the pulse puncturing rate; and

a transducer adapted to generate sound based on the received pulses.

45. A watch, comprising:

a first module adapted to determine a pulse puncturing rate;

a second module adapted to receive pulses based on the pulse puncturing rate; and

a user interface adapted to generate a user indication based on the received pulses.

46. A sensing device, comprising:

a first module adapted to determine a pulse puncturing rate;

a second module adapted to receive pulses based on the pulse puncturing rate; and

a sensor adapted to generate sensing data in response to or based on the received pulses.

47. A method of data communication, comprising:

transmitting a first set of pulses;

receiving information related to a pulse puncturing rate based on the first set of pulses; and

transmitting a subset of a second set of pulses based on the pulse puncturing rate information.

48. The method of claim 47, wherein the first or second set of pulses is modulated based on received data.

49. The method of claim 47, wherein the second set of pulses is based on a pulse puncturing rate substantially equal to zero (0).

50. The method of claim 47, wherein the information related to the pulse puncturing rate comprises at least one of a symbol error rate or a symbol erasure rate.

51. The method of claim 47, further comprising verifying or modifying the pulse puncturing rate before transmitting the subset of the second set of pulses.

52. An apparatus for data communication, comprising:

a transmitter adapted to transmit a first set of pulses and a subset of a second set of pulses; and

a receiver adapted to receive information related to a pulse puncturing rate based on the first set of pulses, wherein the subset of the second set of pulses is based on the puncturing rate information.

53. The apparatus of claim 52, further comprising a modulator adapted to modulate the first or second set of pulses based on received data.

54. The apparatus of claim 52, wherein the second set of pulses is based on a pulse puncturing rate substantially equal to zero (0).

55. The apparatus of claim 52, wherein the information related to the pulse puncturing rate comprises at least one of a symbol error rate or a symbol erasure rate.

56. The apparatus of claim 52, further comprising a module adapted to verify or modify the pulse puncturing rate.

57. An apparatus for data communication, comprising:

means for transmitting a first set of pulses and a subset of a second set of pulses; and

means for receiving information related to a puncturing rate based on the first set of pulses, wherein the subset of the second set of pulses is based on the puncturing rate information.

58. The apparatus of claim 57, further comprising means for modulating the first or second set of pulses based on received data.

59. The apparatus of claim 57, wherein the second set of pulses is based on a pulse puncturing rate substantially equal to zero (0).

60. The apparatus of claim 57, wherein the information related to the pulse puncturing rate comprises at least one of a symbol error rate or a symbol erasure rate.

61. The apparatus of claim 57, further comprising means for verifying or modifying the pulse puncturing rate.

62. A computer program product for data communications comprising a computer readable medium including codes executable to:

transmit a first set of pulses;

receive information related to a puncturing rate based on the first set of pulses; and

transmit a subset of a second set of pulses based on the pulse puncturing rate information.

63. A headset, comprising:

a first module adapted to transmit a first set of pulses and a subset of a second set of pulses;

a second module adapted to receive information related to a pulse puncturing rate based on the first set of pulses, wherein the subset of the second set of pulses is based on the puncturing rate information; and

a transducer adapted to generate audio data, wherein the subset of the second set of pulses is modulated based on the audio data.

64. A watch, comprising:

a first module adapted to transmit a first set of pulses and a subset of a second set of pulses;

a second module adapted to receive information related to a pulse puncturing rate based on the first set of pulses, wherein the subset of the second set of pulses is based on the puncturing rate information; and

a user interface adapted to generate data, wherein the subset of the second set of pulses is modulated based on the data.

65. A sensing device, comprising:

a first module adapted to transmit a first set of pulses and a subset of a second set of pulses;

a second module adapted to receive information related to a pulse puncturing rate based on the first set of pulses, wherein the subset of the second set of pulses is based on the puncturing rate information; and

a sensor adapted to generate sensing data, wherein the subset of the second set of pulses is modulated based on the sensing data.