Methods and apparatus for operating in a wideband communication system

Patent metadata

Field	Value
Publication number	US-12021586-B2
Application number	US-202117644743-A
Country	US
Kind code	B2
Filing date	Dec 16, 2021
Priority date	Jun 17, 2019
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

A method implemented by a first device operating in a communication system includes obtaining a channel representation of a set of channels between the first device and a second device, the set of channels being over a set of subcarriers, the first device having multiple antenna ports, and the second device having one or multiple antenna ports; determining, by the first device, one or multiple communication filters in accordance with at least the channel representation; and applying, by the first device, the one or multiple communication filters to a communication on at least one of the multiple antenna ports of the first device, the communication being over the set of subcarriers.

First claim

What is claimed is:

1. A method comprising:
obtaining, by a first device in a communication system, a channel representation of a set of channels between the first device and a second device, the set of channels being over a set of subcarriers, the first device having multiple antenna ports, and the second device having one or multiple antenna ports;
determining, by the first device, one or multiple communication filters in accordance with at least the channel representation, the channel representation for determining the one or multiple communication filters comprising a channel matrix with dimensions being specified in accordance with the multiple antenna ports of the first device and the one or multiple antenna ports of the second device; and
communicating, by the first device, a signal over the set of subcarriers on at least one of the multiple antenna ports of the first device, the signal being filtered according to the one or multiple communication filters.

2. The method of claim 1 , the obtaining the channel representation of the set of channels comprising:
receiving the channel representation of the set of channels from the second device.

3. The method of claim 1 , the obtaining the channel representation of the set of channels comprising:
determining the channel representation of the set of channels in accordance with individual channel representations of the set of channels.

4. The method of claim 3 , the channel representation being determined in accordance with a phase domain component of the set of channels and a power/amplitude domain component of the set of channels.

5. The method of claim 4 , determining the channel representation comprising the phase domain component of the set of channels constrained under the power/amplitude domain component of the set of channels.

6. The method of claim 3 , the obtaining the channel representation of the set of channels comprising:
receiving, by the first device, reference signals transmitted on the set of channels over the set of subcarriers;
estimating, by the first device, the individual channel representations in accordance with measurements of the reference signals; and
determining, by the first device, the channel representation in accordance with the individual channel representations.

7. The method of claim 1 , the obtaining the channel representation of the set of channels comprising:
receiving, by the first device, an indication of a subcarrier index indicating a subcarrier of the set of subcarriers; and
selecting, by the first device, a channel estimate associated with the subcarrier as the channel representation of the set of channels.

8. The method of claim 1 , the one or more communication filters comprising one or more transmission precoders for a subset of the multiple antenna ports of the first device, or one or more reception combiners for the multiple antenna ports of the first device.

9. The method of claim 1 , the set of channels corresponding to a subset of the set of subcarriers.

10. The method of claim 1 , the communicating the signal comprising:
transmitting a first message or receiving a second message.

11. A method comprising:
receiving, by a first device on multiple antenna ports of the first device, signals received on a set of channels over a set of subcarriers of a communication system;
determining, by the first device, a channel representation of the set of channels in accordance with the signals received on the set of channels over the set of subcarriers; and
transmitting, by the first device, the channel representation, the channel representation for determining one or multiple communication filters comprising a channel matrix with dimensions being specified in accordance with the multiple antenna ports of the first device and one or multiple antenna ports of a second device.

12. The method of claim 11 , further comprising:
receiving, by the first device, resource allocation information associated with resources conveying the received signals.

13. The method of claim 11 , the transmitting the channel representation comprising:
transmitting, by the first device, an indication of a subcarrier index associated with the channel representation, the subcarrier index indicating a subcarrier of the set of subcarriers.

14. The method of claim 11 , the transmitting the channel representation comprising:
transmitting, by the first device, an indication of the channel representation.

15. A first device comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the non-transitory memory storage, wherein the one or more processors execute the instructions to cause the first device to perform operations including:
obtaining a channel representation of a set of channels between the first device and a second device, the set of channels being over a set of subcarriers, the first device having multiple antenna ports, and the second device having one or multiple antenna ports;
determining one or more communication filters in accordance with at least the channel representation, the channel representation for determining the one or multiple communication filters comprising a channel matrix with dimensions being specified in accordance with the multiple antenna ports of the first device and the one or multiple antenna ports of the second device; and
communicating a signal over the set of subcarriers on at least one of the multiple antenna ports of the first device, the signal being filtered according to the one or multiple communication filters.

16. The first device of claim 15 , the obtaining the channel representation of the set of channels comprising:
receiving the channel representation of the set of channels from the second device.

17. The first device of claim 15 , the obtaining the channel representation of the set of channels comprising:
determining the channel representation of the set of channels in accordance with individual channel representations of the set of channels.

18. The first device of claim 17 , the channel representation being determined in accordance with a phase domain component of the set of channels and a power/amplitude domain component of the set of channels.

Assignees

• Huawei Tech Co Ltd

Inventors

• Liu Jialing
• Cheng Qian
• Xiao Weimin
• Maamari Diana
• Soong Anthony C K

Classifications

• H04L25/0224 Primary

  using sounding signals · CPC title

• H04B7/0842

  Weighted combining · CPC title

• H04B7/0636

  Feedback format · CPC title

• H04B7/0617 Primary

  for beam forming · CPC title

• H04L25/0248

  Eigen-space methods · CPC title