Techniques to manage channel prediction

Patent metadata

Field	Value
Publication number	US-10056996-B2
Application number	US-201715463461-A
Country	US
Kind code	B2
Filing date	Mar 20, 2017
Priority date	Jan 21, 2005
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

A system, apparatus, method and article to manage channel prediction for a wireless communication system are described. The apparatus may include a media access control processor to perform channel prediction, and a transceiver to communicate information using the channel prediction. Other embodiments are described and claimed.

First claim

The invention claimed is:

1. An apparatus, comprising:
circuitry to:
perform a sounding of a closed-loop multiple-input-multiple-output (MIMO) communication channel, the sounding to comprise transmission of sounding symbols to a mobile device via the closed-loop MIMO communication channel;
identify a beamforming matrix received from the mobile device, the beamforming matrix generated by the mobile device in response to the sounding; and
update the identified beamforming matrix to account for a processing delay; and

a MIMO transceiver array to use the updated beamforming matrix to transmit one or more orthogonal frequency division multiplexing (OFDM) symbols to the mobile device via the closed-loop MIMO communication channel.

2. The apparatus of claim 1 , the identified beamforming matrix generated based on measured channel state information for the closed-loop MIMO communication channel.

3. The apparatus of claim 2 , the measured channel state information to comprise channel responses for previously communicated frames of information.

4. The apparatus of claim 1 , the identified beamforming matrix generated based on an anticipated feedback delay associated with the sounding of the closed-loop MIMO communication channel.

5. The apparatus of claim 1 , the identified beamforming matrix generated based on predicted channel state information for a first future point in time, the circuitry to determine a second future point in time based on the first future point in time and the processing delay and update the identified beamforming matrix for use in beamforming at the second future point in time.

6. The apparatus of claim 5 , the circuitry to determine updated predicted channel state information based on the predicted channel state information and the processing delay and update the identified beamforming matrix based on the updated predicted channel state information.

7. The apparatus of claim 6 , the circuitry to select a modulation and coding scheme for the closed-loop MIMO communication channel using the updated predicted channel state information.

8. The apparatus of claim 6 , the circuitry to perform minimum mean square error (MMSE) spatial decoupling using the updated predicted channel state information.

9. The apparatus of claim 1 , comprising a plurality of antennas coupled to the MIMO transceiver array.

10. At least one non-transitory machine-readable storage medium storing a set of instructions that, in response to being executed by circuitry of a wireless communication device, cause the wireless communication device to:
perform a sounding of a closed-loop multiple-input-multiple-output (MIMO) communication channel, the sounding to comprise transmission of sounding symbols to a mobile device via the closed-loop MIMO communication channel;
identify a beamforming matrix received from the mobile device, the beamforming matrix generated by the mobile device in response to the sounding;
update the identified beamforming matrix to account for a processing delay; and
use the updated beamforming matrix to transmit one or more orthogonal frequency division multiplexing (OFDM) symbols to the mobile device via the closed-loop MIMO communication channel.

11. The at least one non-transitory machine-readable storage medium of claim 10 , the identified beamforming matrix generated based on measured channel state information for the closed-loop MIMO communication channel.

12. The at least one non-transitory machine-readable storage medium of claim 11 , the measured channel state information to comprise channel responses for previously communicated frames of information.

13. The at least one non-transitory machine-readable storage medium of claim 10 , the identified beamforming matrix generated based on an anticipated feedback delay associated with the sounding of the closed-loop MIMO communication channel.

14. The at least one non-transitory machine-readable storage medium of claim 10 , storing instructions that, in response to being executed by the circuitry, cause the wireless communication device to:
determine a second future point in time based on a first future point in time and the processing delay, the identified beamforming matrix generated based on predicted channel state information for the first future point in time; and
update the identified beamforming matrix for use in beamforming at the second future point in time.

15. The at least one non-transitory machine-readable storage medium of claim 14 , storing instructions that, in response to being executed by the circuitry, cause the wireless communication device to:
determine updated predicted channel state information based on the predicted channel state information and the processing delay; and
update the identified beamforming matrix based on the updated predicted channel state information.

16. The at least one non-transitory machine-readable storage medium of claim 15 , storing instructions that, in response to being executed by the circuitry, cause the wireless communication device to select a modulation and coding scheme for the closed-loop MIMO communication channel using the updated predicted channel state information.

17. The at least one non-transitory machine-readable storage medium of claim 15 , storing instructions that, in response to being executed by the circuitry, cause the wireless communication device to perform minimum mean square error (MMSE) spatial decoupling using the updated predicted channel state information.

18. A method, comprising:
performing, by circuitry of a wireless communication device, a sounding of a closed-loop multiple-input-multiple-output (MIMO) communication channel, the sounding to comprise transmission of sounding symbols to a mobile device via the closed-loop MIMO communication channel;
identifying a beamforming matrix received from the mobile device, the beamforming matrix generated by the mobile device in response to the sounding;
updating the identified beamforming matrix to account for a processing delay; and
using the updated beamforming matrix to transmit one or more orthogonal frequency division multiplexing (OFDM) symbols to the mobile device via the closed-loop MIMO communication channel.

19. The method of claim 18 , the identified beamforming matrix generated based on measured channel state information for the closed-loop MIMO communication channel.

20. The method of claim 19 , the measured channel state information to comprise channel responses for previously communicated frames of information.

21. The method of claim 18 , the identified beamforming matrix generated based on an anticipated feedback delay associated with the sounding of the closed-loop MIMO communication channel.

22. The method of claim 18 , comprising:
determining a second future point in time based on a first future point in time and the processing delay, the identified beamforming matrix generated based on predicted channel state information for the first future point in time; and
updating the identified beamforming matrix for use in beamforming at the second future point in time.

23. The method of claim 22 , comprising:
determining updated predicted channel state information based on the predicted channel state information and the processing delay; and
updating the identified beamforming matrix based on the updated predicted channel state information.

24. The method of claim 23 , comprising selecting a modulation and coding scheme for the

Assignees

• Intel Corp

Inventors

• Li Qinghua
• Lin Xintian E

Classifications

• H04L1/0003

  by switching between different modulation schemes · CPC title

• H04L1/0032

  Without explicit signalling · CPC title

• H04B7/0408

  using two or more beams, i.e. beam diversity · CPC title

• H04B17/373 Primary

  Predicting channel quality {or other radio frequency [RF]} parameters · CPC title

• H04L1/0009

  by adapting the channel coding (H04L1/1812 takes precedence) · CPC title