First and second communication devices and methods

Patent metadata

Field	Value
Publication number	US-12445334-B2
Application number	US-202118271244-A
Country	US
Kind code	B2
Filing date	Dec 17, 2021
Priority date	Jan 14, 2021
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A first communication device that is configured to transmit data to a second communication device comprises circuitry configured to generate a second number of mutually orthogonal sequences; generate a third number of one or more spatial streams, each spatial stream carrying payload data; split each of a first number of training symbols into a fourth number of tone sets, each training symbol spanning a plurality of tones; split each orthogonal sequence elements of the corresponding portion of the orthogonal sequences onto the tone sets of the training symbols; and arrange the training field before and/or between the payload data of the spatial streams to enable channel estimation by the second communication device.

First claim

The invention claimed is:

1. A first communication device configured to transmit data to a second communication device, the first communication device comprising:
circuitry configured to:
generate a second number of mutually orthogonal sequences;
generate a third number of one or more spatial streams, each spatial stream carrying payload data;
split each of a first number of training symbols into a fourth number of tone sets, each training symbol spanning a plurality of tones;
split each orthogonal sequence into the fourth number of portions,
generate a training field by mapping elements of the corresponding portion of the orthogonal sequences onto the tone sets of the training symbols; and
arrange the training field before and/or between the payload data of the spatial streams to enable channel estimation by the second communication device.

2. The first communication device as claimed in claim 1 , wherein the product between the first number and the fourth number is greater than or equal to the third number.

3. The first communication device as claimed in claim 1 , wherein the number of elements of each orthogonal sequence is equal to the product between the first number and the fourth number.

4. The first communication device as claimed in claim 1 , wherein the circuitry is configured to map a first portion of each orthogonal sequence onto a first tone set of the training symbols and to map a second portion of each orthogonal sequence onto a second tone set of the training symbols.

5. The first communication device as claimed in claim 1 , wherein the circuitry is configured to map a first portion of each orthogonal sequence onto a first tone set comprising odd-numbered tones of the training symbols and to map a second portion of each orthogonal sequence onto a second tone set comprising even-numbered tones of the training symbols.

6. The first communication device as claimed in claim 1 , wherein the circuitry is configured to map the elements of a first portion of an orthogonal sequence and the elements of a second portion of the same orthogonal sequence onto neighboring tones of the training symbols.

7. The first communication device as claimed in claim 1 , wherein the circuitry is configured to determine a fifth number of neighboring tones forming a group of neighboring tones onto which portions of an orthogonal sequence can be mapped by measuring channel correlation between tones.

8. The first communication device as claimed in claim 1 , wherein the circuitry is configured to obtain signaling information from the second communication device, said signaling information indicating if a fifth number of a group of neighboring tones, onto which portions of an orthogonal sequence can be mapped, should be increased or decreased, and/or including information indicating the first number and/or the fourth number.

9. The first communication device as claimed in claim 1 , wherein the circuitry is configured to identify a spatial stream by a distinct orthogonal sequence, wherein the training field contains the third number of distinct sets of training symbols that have been mapped with distinct orthogonal sequences.

10. The first communication device as claimed in claim 9 , wherein the circuitry is configured to directly or indirectly map corresponding sets of training symbols and payload data of each spatial stream onto transmit antennas using multiple input multiple output, (MIMO) techniques.

11. A second communication device configured to receive data from a first communication device, the second communication device comprising:
circuitry configured to:
obtain one or more intended channel observations of one or more channels between the first communication device and the second communication device based on at least a part of a training field, the training field being arranged before and/or between payload data of a third number of one or more spatial streams received from the first communication device, wherein each spatial stream carries the payload data, each of a first number of training symbols is split into a fourth number of tone sets and spans a plurality of tones, and a second number of mutually orthogonal sequences is each split into the fourth number of portions, wherein elements of a corresponding portion of the orthogonal sequences are mapped onto the tone sets of the training symbols to generate the training field;
perform interference channel estimation of one or more potential interference channels based on another part of said training field; and
perform interference suppression based on interference channel estimation information resulting from the interference channel estimation.

12. The second communication device as claimed in claim 11 , wherein the circuitry is configured to demap a first portion of the orthogonal sequences from a first tone set of the training symbols and a second portion of the orthogonal sequences from a second tone set of the training symbols to obtain the one or more intended channel observations and optionally interference channel observations.

13. The second communication device as claimed in claim 11 , wherein the circuitry is configured to transmit signaling information from the second communication device, said signaling information indicating if a fifth number of a group of neighboring tones, onto which portions of an orthogonal sequence can be mapped, shall be increased or decreased, and/or including information indicating the first number and/or the fourth number.

14. The second communication device as claimed in claim 11 , wherein the circuitry is configured to obtain one or more interference channel observations of the one or more potential interference channels based on another part of said training field.

15. The second communication device as claimed in claim 11 , wherein the circuitry is configured to perform intended channel estimation of the one or more channels based on the one or more intended channel observations and/or to decode data from the received spatial streams.

16. The second communication device as claimed in claim 11 , wherein the circuitry is configured to:
use interference channel estimates to compute an estimate of a covariance matrix of an interference channel that describes spatial directions from which interference comes from, and
combine the signals from reception antennas in a way that the spatial directions spanned by the covariance matrix of the interference are suppressed.

17. The second communication device as claimed in claim 11 , wherein the circuitry is configured to extract a first part of the training field used for intended channel estimation by projecting the one or more intended channel observations with the orthogonal sequences that were transmitted by each spatial stream and/or to extract the other part of the training field used for interference channel estimation by projecting the one or more intended channel observations with the orthogonal sequences that were not transmitted.

18. A method of transmitting data from a first communication deice to a second communication device, the method comprising:
generating a second number of mutually orthogonal sequences;
generating a third number of one or more spatial streams, each spatial stream carrying payload data;
splitting each of a first number of training symbols into a fourth number of tone sets, each training symbol spanning a plurality of tones;
splitting each orthogonal sequence into the fourth number of portions;
generating a training field by mapping elements of the corresponding portion of the orthogona

Assignees

• Sony Group Corp

Inventors

• Verenzuela Daniel
• Handte Thomas
• Ciochina-Kar Dana

Classifications

• H04L25/0226

  sounding signals per se · CPC title

• H04L5/0023

  Time-frequency-space · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L27/2613 Primary

  Structure of the reference signals · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title