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1. WO2011005533 - PRECODING CONTROL CHANNELS IN WIRELESS NETWORKS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1. A method for wireless communication, comprising:

receiving one or more signals over resources allocated for a downlink control channel;

determining a precoder utilized to precode the one or more signals; and decoding the one or more signals based at least in part on the precoder.

2. The method of claim 1, further comprising performing a channel estimation based at least in part on a received dedicated reference signal (DRS), wherein the determining the precoder is based at least in part on the channel estimation.

3. The method of claim 2, wherein the receiving the one or more signals comprises receiving one or more control channel elements comprising control data and the received DRS.

4. The method of claim 2, wherein the performing the channel estimation is further based at least in part on a received common reference signal.

5. The method of claim 1 , wherein the determining the precoder includes selecting a next precoder in a sequence of precoders for at least a portion of the one or more signals.

6. The method of claim 5, further comprising receiving one or more parameters regarding the sequence of precoders from an access point, wherein the receiving the one or more signals includes receiving the one or more signals from the access point.

7. The method of claim 5, wherein the selecting the next precoder in the sequence of precoders comprises selecting the next precoder for each control channel element in the one or more signals.

8. The method of claim 1, further comprising transmitting control data regarding a common reference signal to an access point, wherein the receiving the one or more signals includes receiving the one or more signals from the access point.

9. An apparatus for wireless communication, comprising:

at least one processor configured to:

receive one or more signals over resources related to a downlink control channel;

determine a precoder utilized to precode the one or more signals; and decode the one or more signals based at least in part on the precoder; and a memory coupled to the at least one processor.

10. The apparatus of claim 9, wherein:

the at least one processor is further configured to perform a channel estimation based at least in part on a received dedicated reference signal (DRS); and

the at least one processor determines the precoder based at least in part on the channel estimation.

11. The apparatus of claim 10, wherein the at least one processor is configured to receive the DRS as part of the one or more signals.

12. The apparatus of claim 9, wherein:

the at least one processor is further configured to receive one or more parameters regarding a sequence of precoders from an access point; and

the at least one processor determines the precoder based at least in part on a selection of a next precoder in the sequence of precoders.

13. The apparatus of claim 12, wherein the selection of the next precoder in the sequence of precoders is for each control channel element in the one or more signals.

14. An apparatus for wireless communication, comprising:

means for receiving one or more signals over resources allocated for a downlink control channel;

means for determining a precoder utilized to precode the one or more signals; and

means for decoding the one or more signals based at least in part on the precoder.

15. The apparatus of claim 14, further comprising means for performing a channel estimation based at least in part on a received dedicated reference signal (DRS), wherein the means for determining the precoder comprises means for determining the precoder based at least in part on the channel estimation.

16. The apparatus of claim 15, wherein the one or more signals includes control data and the DRS.

17. The apparatus of claim 14, further comprising means for receiving one or more parameters regarding a sequence of precoders, wherein the means for determining the precoder comprises means for selecting a next precoder in the sequence of precoders based at least in part on the one or more parameters.

18. A computer program product, comprising :

a computer-readable medium comprising:

code for causing at least one computer to receive one or more signals over resources related to a downlink control channel;

code for causing the at least one computer to determine a precoder utilized to precode the one or more signals; and

code for causing the at least one computer to decode the one or more signals based at least in part on the precoder.

19. The computer program product of claim 18, wherein the computer-readable medium further comprises code for causing the at least one computer to perform a channel estimation based at least in part on a received dedicated reference signal (DRS), and wherein the code for causing the at least one computer to determine the precoder is based at least in part on the channel estimation.

20. The computer program product of claim 19, wherein the computer-readable medium further comprises code for causing the at least one computer to receive the DRS as part of the one or more signals.

21. The computer program product of claim 18, wherein the computer-readable medium further comprises code for causing the at least one computer to receive one or more parameters regarding a sequence of precoders from an access point, and wherein the code for causing the at least one computer to determine the precoder is based at least in part on a selection of a next precoder in the sequence of precoders.

22. The computer program product of claim 21 , wherein the selection of the next precoder is for each control channel element in the one or more signals.

23. A method for wireless communication, comprising:

selecting a precoder for precoding one or more signals for transmission over resources related to a downlink control channel;

precoding the one or more signals using the precoder to generate one or more precoded signals; and

transmitting the one or more precoded signals to over the resources related to the downlink control channel.

24. The method of claim 23, wherein the selecting the precoder is based at least in part on a channel quality indicator or a precoding matrix indicator received from a wireless device.

25. The method of claim 24, wherein the precoding comprises precoding a dedicated reference signal (DRS) specific to the wireless device.

26. The method of claim 25, further comprising increasing an aggregation level of control channel elements related to the one or more signals based at least in part on precoding the DRS.

27. The method of claim 23, wherein the selecting the precoder comprises selecting a next precoder in a sequence of precoders for at least a portion of the one or more signals.

28. The method of claim 27, further comprising:

generating the sequence of precoders for a wireless device; and

transmitting one or more parameters regarding the sequence of precoders to the wireless device.

29. The method of claim 28, wherein the generating the sequence of precoders comprises generating a random sequence of precoders or generating the sequence of precoders based at least in part on feedback received from the wireless device.

30. An apparatus for wireless communication, comprising:

at least one processor configured to:

select a precoder for precoding one or more signals for transmission over downlink control channel resources;

precode the one or more signals using the precoder to generate one or more precoded signals; and

transmit the one or more precoded signals over the downlink control channel resources; and

a memory coupled to the at least one processor.

31. The apparatus of claim 30, wherein the at least one processor is configured to select the precoder based at least in part on a channel quality indicator or precoding matrix indicator received from a wireless device.

32. The apparatus of claim 31 , wherein:

the at least one processor is configured to precode a dedicated reference signal (DRS) specific to the wireless device; and

the at least one processor is configured to transmit the DRS to the wireless device.

33. The apparatus of claim 32, wherein the at least one processor is further configured to increase a control channel element aggregation level related to the one or more signals based at least in part on precoding the DRS.

34. The apparatus of claim 30, wherein the at least one processor is configured to select a next precoder in a sequence of precoders for at least a portion of the one or more signals.

35. The apparatus of claim 34, wherein:

the at least one processor is further configured to generate the sequence of precoders for a wireless device; and

the at least one processor is further configured to transmit one or more parameters regarding the sequence of precoders to the wireless device.

36. The apparatus of claim 34, wherein the at least one processor is configured to select the next precorder for each control channel element in the one or more signals.

37. An apparatus for wireless communication, comprising:

means for selecting a precoder for precoding one or more signals for transmission over resources related to a downlink control channel;

means for precoding the one or more signals using the precoder to produce one or more precoded signals; and

means for transmitting the one or more precoded signals over the resources related to the downlink control channel.

38. The apparatus of claim 37, wherein the means for selecting comprises means for selecting the precoder based at least in part on a channel quality indicator or a precoding matrix indicator received from a wireless device.

39. The apparatus of claim 37, wherein the means for precoding comprises means for precoding a dedicated reference signal (DRS) specific to a wireless device.

40. The apparatus of claim 39, further comprising:

means for generating the sequence of precoders for the wireless device; and means for transmitting one or more parameters regarding the sequence of precoders to the wireless device.

41. The apparatus of claim 40, wherein the means for generating the sequence of precoders comprises means for generating a random sequence of precoders or generating the sequence of precoders based at least in part on feedback received from the wireless device.

42. The apparatus of claim 40, further comprising means for increasing a control channel element aggregation level related to the one or more signals based at least in part on precoding the DRS.

43. A computer program product, comprising:

a computer-readable medium comprising:

code for causing at least one computer to select a precoder for precoding one or more signals for transmission over downlink control channel resources; code for causing the at least one computer to generate one or more precoded signals based at least in part on applying the precoder to the one or more signals; and

code for causing the at least one computer to transmit the one or more precoded signals over the downlink control channel resources.

44. The computer program product of claim 43, wherein the code for causing the at least one computer to select the precoder comprises code for causing the at least one computer to select the precoder based at least in part on a channel quality indicator or precoding matrix indicator received from a wireless device.

45. The computer program product of claim 43 , wherein:

the code for causing the at least one computer to generate the one or more coded signals comprises code for causing the at least one computer to apply the percoder to a dedicated reference signal (DRS) specific to a wireless device; and

the code for causing the at least one computer to transmit the one or more precoded signals comprises code for causing the at least one computer to transmit the DRS to the wireless device.

46. The computer program product of claim 45, wherein the computer-readable medium further comprises code for causing the at least one computer to increase a control channel element aggregation level related to the one or more signals based at least in part on precoding the DRS.

47. The computer program product of claim 43, wherein the code for causing the at least one computer to select the precoder comprises code for causing the at least one computer to cycle through a sequence of precoders for precoding the one or more signals.