Abstract
Systems and methods for improving the performance of a MIMO wireless communication system by reducing the amount of uplink resources that are needed to provide channel performance feedback for the adjustment of data rates on the downlink MIMO channels. In one embodiment a method comprises encoding each of a set of data streams according to corresponding data rates permuting the data streams on a set of MIMO channels according to a full permutation of combinations transmitting the permuted data streams receiving the permuted data streams decoding and determining an SNR for each of the data streams computing a condensed SNR metric for the set of data streams providing the condensed metric as feedback determining a set of individual SNR metrics for the data streams based on the condensed SNR metric and adjusting the data rates at which the data streams are encoded based on the individual SNR metrics.
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Specification Information
Specification Information
Technologies
Family Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Multiple-Input Multiple-Output(MIMO)/Massive MIMO
Product
Use Cases
Wireless communication
Services
Claim
1. A method implemented in a multiple-input, multiple-output (MIMO) wireless communication system, comprising: transmitting each of a plurality of data streams from a first station to a second station in a permuted fashion over a plurality of MIMO channels; inversely permuting the data streams at the second station; determining a quality metric for each of the data streams at the second station; determining a condensed quality metric at the second station based on the quality metrics for each of the data streams; and transmitting the condensed quality metric from the second station to the first station.
2. The method of claim 1, further comprising: encoding in the first station each the plurality of data streams according to corresponding data rates; and adjusting the data rates at which the data streams are encoded at the first station based on the condensed quality metric.
3. The method of claim 2, wherein the quality metric comprises a signal-to-noise ratio (SNR), wherein the condensed quality metric comprises a reference SNR value and a Îx94SNR value, and wherein adjusting the data rates at which the data streams are encoded based on the condensed quality metric comprises adjusting the data rate for each channel based on the reference SNR value plus a multiple of the Îx94SNR value.
4. The method of claim 1, wherein the first station is a base station and the second station is a mobile station.
5. The method of claim 1, wherein transmitting the data streams in permuted fashion comprises mixing the data streams on the MBvIO channels in a pseudorandom pattern.
6. The method of claim 5, wherein the pseudorandom pattern comprises a full permutation of possible combinations of the data streams and the MIMO channels.
7. The method of claim 1, wherein the quality metric comprises a signal-to-noise ratio (SNR).
8. The method of claim 7, wherein the condensed quality metric comprises a reference SNR value and a Îx94SNR value.
9. The method of claim 1, further comprising decoding the encoded data streams at the second station
10. The method of claim 9, wherein the encoded data streams are decoded at the second station using successive interference cancellation
11. A method for multiple-input, multiple-output (MEVIO) wireless communication comprising: encoding each of a plurality of data streams according to corresponding data rates; transmitting the data streams in a permuted fashion over a plurality of MIMO channels to a second station; receiving a condensed quality metric; and adjusting the data rates at which the data streams are encoded based on the condensed quality metric
12. The method of claim 11, wherein transmitting the data streams in permuted fashion comprises mixing the data streams on the MEVIO channels in a pseudorandom pattern
13. The method of claim 12, wherein the pseudorandom pattern comprises a full permutation of possible combinations of the data streams and the MEVIO channels
14. The method of claim 11, wherein the quality metric comprises a signal-to-noise ratio (SNR)
15. The method of claim 14, wherein the condensed quality metric comprises a reference SNR value and a Îx94SNR value
16. The method of claim 15, wherein adjusting the data rates at which the data streams are encoded based on the condensed quality metric comprises adjusting the data rate for each channel based on the reference SNR value plus a multiple of the Îx94SNR value
17. A method for multiple-input, multiple-output (MIMO) wireless communication comprising: receiving a plurality of permuted data streams over a plurality of MDVIO channels; inversely permuting the data streams; determining a quality metric for each of the data streams; determining a condensed quality metric based on the quality metrics for each of the data streams; and transmitting the condensed quality metric to a base station
18. The method of claim 17, wherein the data streams are permuted in a pseudorandom pattern
19. The method of claim 18, wherein the pseudorandom pattern comprises a full permutation of possible combinations of the data streams and the MBVIO channels.
20. The method of claim 17, wherein the quality metric comprises a signal-to-noise ratio (SNR).
21. The method of claim 20, wherein the condensed quality metric comprises a reference SNR value and a Îx94SNR value.
22. The method of claim 17, further comprising decoding the encoded data streams.
23. The method of claim 22, wherein the encoded data streams are decoded using successive interference cancellation.
24. A base station for a MIMO wireless communication system comprising: a processing subsystem; and a transceiver subsystem having a plurality of transmit antennas and being coupled to the processing subsystem; wherein the processing subsystem is configured to encode each of a plurality of data streams according to a corresponding data rate, permute the data streams and control the transceiver subsystem to transmit each of the data streams over a plurality of MIMO channels corresponding to the transmit antennas, receive a condensed quality metric associated with all of the data streams, determine an individual quality metric associated with each of the data streams based on the condensed quality metric, and adjust the data rates at which each of the data streams is encoded based on the individual quality metric associated with each of the data streams.
25. The base station of claim 24, wherein the processing subsystem is configured to mix the data streams on the MIMO channels in a pseudorandom pattern
26. The base station of claim 25, wherein the pseudorandom pattern comprises a full permutation of possible combinations of the data streams and the MBVIO channels
27. The base station of claim 24, wherein the quality metric comprises a signal-to- noise ratio (SNR)
28. The base station of claim 27, wherein the condensed quality metric comprises a reference SNR value and a Îx94SNR value
29. The base station of claim 28, wherein the processing subsystem is configured to adjust the data rate at which each data stream is encoded by computing a corresponding SNR equal to the reference SNR value plus a multiple of the Îx94SNR value, wherein successive ones of the data streams have successively higher SNRs
30. A mobile station for a MIMO wireless communication system comprising: a processing subsystem; and a transceiver subsystem having a plurality of receive antennas and being coupled to the processing subsystem; wherein the processing subsystem is configured to receive permuted data streams via the receive antennas, inversely permute the data streams, decode the data streams, determine an individual quality metric corresponding to each of the data streams, determine a condensed quality metric based on the individual quality metrics corresponding to each of the data streams, and control the transceiver subsystem to transmit the condensed quality metric to a base station.
31. The mobile station of claim 30, wherein the processing subsystem is configured to inversely permute the data streams according to a pseudorandom pattern.
32. The mobile station of claim 31, wherein the pseudorandom pattern comprises a full permutation of possible combinations of the data streams and the MTMO channels.
33. The mobile station of claim 30, wherein the quality metric comprises a signal-to- noise ratio (SNR).
34. The mobile station of claim 33, wherein the condensed quality metric comprises a reference SNR value and a Îx94SNR value.
35. The mobile station of claim 30, further comprising the processing subsystem decoding the encoded data streams.
36. The mobile station of claim 35, wherein the processing subsystem decodes the encoded data streams using successive interference cancellation.
37. A multiple-input, multiple-output (MIMO) wireless communication system, comprising: means for transmitting each of a plurality of data streams from a first station to a second station in a permuted fashion over a plurality of MIMO channels; means for inversely permuting the data streams at the second station; means for determining a quality metric for each of the data streams at the second station; means for determining a condensed quality metric at the second station based on the quality metrics for each of the data streams; and means for transmitting the condensed quality metric from the second station to the first station.
38. The system of claim 37, further comprising: means for encoding in the first station each the plurality of data streams according to corresponding data rates; and means for adjusting the data rates at which the data streams are encoded at the first station based on the condensed quality metric.
39. The system of claim 38, wherein the quality metric comprises a signal-to-noise ratio (SNR), wherein the condensed quality metric comprises a reference SNR value and a Îx94SNR value, and wherein the means for adjusting the data rates is configured to adjust the data rate for each channel based on the reference SNR value plus a multiple of the Îx94SNR value.
40. The system of claim 37, wherein the first station is a base station and the second station is a mobile station.
41. The system of claim 37, wherein the means for transmitting the data streams in permuted fashion is configured to mix the data streams on the MIMO channels in a pseudorandom pattern.
42. The system of claim 41 , wherein the pseudorandom pattern comprises a full permutation of possible combinations of the data streams and the MIMO channels.
43. The system of claim 37, wherein the quality metric comprises a signal-to-noise ratio (SNH).
44. The system of claim 43, wherein the condensed quality metric comprises a reference SNR value and a Îx94SNR value.
45. The system of claim 37, further comprising means for decoding the encoded data streams at the second station.
46. The system of claim 45, wherein the means for decoding the encoded data streams is configured to decode the encoded data streams using successive interference cancellation.']
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