Data sending method, apparatus, and device, and data receiving method, apparatus, and device

Patent metadata

Field	Value
Publication number	US-9843463-B2
Application number	US-201615379907-A
Country	US
Kind code	B2
Filing date	Dec 15, 2016
Priority date	Jun 19, 2014
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A transmit end determines M first time-frequency resource locations and S second time-frequency resource locations, and determines, in the S second time-frequency resource locations, S/2 second time-frequency resource locations as a first set, and S/2 second time-frequency resource locations excluding the second time-frequency resource locations in the first set as a second set; determines a communication data symbol sent at the second time-frequency resource locations in the first set; obtains, a compensation data symbol sent at the second time-frequency resource locations in the second set, where interference of the communication data symbol to the pilot data symbol cancels out interference of the compensation data symbol to the pilot data symbol; and separately sends the pilot data symbol at the M first time-frequency resource locations, and sends the communication data symbol and the compensation data symbol at the S second time-frequency resource locations.

First claim

What is claimed is:

1. A data sending method, comprising:
determining, by a transmit end in a time-frequency resource, M first time-frequency resource locations and S second time-frequency resource locations in a preset neighborhood of the M first time-frequency resource locations, wherein S=2M;
determining, in the S second time-frequency resource locations, S/2 second time-frequency resource locations as a first set, and S/2 second time-frequency resource locations excluding the second time-frequency resource locations in the first set as a second set;
determining a communication data symbol sent at the second time-frequency resource locations in the first set, and calculating, according to the communication data symbol, a compensation data symbol sent at the second time-frequency resource locations in the second set, wherein interference of the communication data symbol to the pilot data symbol cancels out interference of the compensation data symbol to the pilot data symbol; and
separately sending the pilot data symbol at the M first time-frequency resource locations, sending the communication data symbol at the second time-frequency resource locations in the first set, and sending the compensation data symbol at the second time-frequency resource locations in the second set.

2. The method according to claim 1 , wherein the determining S second time-frequency resource locations in the preset neighborhood of the M first time-frequency resource locations comprises:
determining the S second time-frequency resource locations that cause interference to the M first time-frequency resource locations.

3. The method according to claim 2 , wherein the determining the S second time-frequency resource locations that cause the interference to the M first time-frequency resource locations comprises:
determining, according to a multiplexing converter response, the S second time-frequency resource locations in time-frequency resource locations corresponding to a first preset range of the multiplexing converter response of the M first time-frequency resource locations; or
determining, according to an interference coefficient table, the S second time-frequency resource locations in time-frequency resource locations corresponding to a second preset range of the interference coefficient table of the M first time-frequency resource locations; or
determining, according to a system preset parameter, the S second time-frequency resource locations that cause the interference to the M first time-frequency resource locations.

4. The method according to claim 1 , wherein the M first time-frequency resource locations are corresponding to N consecutive multicarrier symbols, and corresponding to M/N consecutive subcarriers; and
the S second time-frequency resource locations are corresponding to T multicarrier symbols, and corresponding to S/T subcarriers, wherein
the T multicarrier symbols are multicarrier symbols corresponding to numbers sequentially adjacent to numbers of the N consecutive multicarrier symbols, and M/N=S/T; or
T=N, the T multicarrier symbols are the N multicarrier symbols, and in each multicarrier symbol, S/T subcarriers that are corresponding to the S second time-frequency resource locations are subcarriers corresponding to numbers sequentially adjacent to numbers of M/N subcarriers that are corresponding to the M first time-frequency resource locations.

5. The method according to claim 1 , wherein the calculating, according to the communication data symbol, the compensation data symbol sent in the second set comprises:
obtaining a first interference coefficient matrix formed by interference coefficients of interference caused by the second time-frequency resource locations in the first set to the M first time-frequency resource locations;
obtaining a second interference coefficient matrix formed by interference coefficients of interference caused by the second time-frequency resource locations in the second set to the M first time-frequency resource locations; and
obtaining the compensation data symbol by means of calculation according to the communication data symbol, the first interference coefficient matrix, and the second interference coefficient matrix, so that the interference of the communication data symbol to the pilot data symbol cancels out the interference of the compensation data symbol to the pilot data symbol.

6. The method according to claim 5 , wherein the obtaining the compensation data symbol by the means of calculation according to the communication data symbol, the first interference coefficient matrix, and the second interference coefficient matrix comprises:
obtaining the compensation data symbol by the means of calculation according to the communication data symbol, the first interference coefficient matrix, and the second interference coefficient matrix and according to the following calculation formula:
M d d+M c c= 0, wherein

M d represents the first interference coefficient matrix, M c represents the second interference coefficient matrix, d represents a communication data symbol set in the first set, and c represents a compensation data symbol set in the second set.

7. A data receiving method, comprising:
receiving, by a receive end, a data symbol at a time-frequency resource location to which a pilot sequence is mapped, wherein the pilot sequence has M first time-frequency resource locations and S second time-frequency resource locations, the S second time-frequency resource locations are located in a preset neighborhood of the M first time-frequency resource locations, and S=2M; in the S second time-frequency resource locations, S/2 second time-frequency resource locations are a first set, and S/2 second time-frequency resource locations excluding the first set are a second set; and a transmit end sends a pilot data symbol at the M first time-frequency resource locations, sends a communication data symbol at the S/2 second time-frequency resource locations in the first set, and sends a compensation data symbol at the S/2 second time-frequency resource locations in the second set, wherein interference of the communication data symbol to the pilot data symbol cancels out interference of the compensation data symbol to the pilot data symbol;
performing channel estimation according to the received data symbol and the pilot data symbol, to obtain a channel estimation value; and
obtaining, by using the channel estimation value and according to data obtained by means of demodulation at the second time-frequency resource locations in the first set and/or data obtained by means of demodulation at the second time-frequency resource locations in the second set, communication data corresponding to the communication data symbol.

8. The method according to claim 7 , wherein the obtaining, by using the channel estimation value and according to the data obtained by the means of demodulation at the second time-frequency resource locations in the first set and/or data obtained by the means of demodulation at the second time-frequency resource locations in the second set, the communication data corresponding to the communication data symbol comprises:
by using the channel estimation value, separately obtaining first demodulation data of the communication data symbol by means of demodulation at the second time-frequency resource locations in the first set, and obtaining compensation demodulation data of the compensation data symbol by means of demodulation at the second time-frequency resource locations in the second set;
obtaining second demodulation data of the communication data symbol by means of calculation by using the compensation demodulation data, and interference coefficients of the communication data symbol and t

Assignees

• Huawei Tech Co Ltd

Inventors

• Jiang Tao
• Kong Dejin
• Cui Wenjia
• Ren Guangmei

Classifications

• H04L25/0228

  with direct estimation from sounding signals · 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

• H04L25/022

  of frequency response · CPC title

• H04L27/2698

  double density OFDM/OQAM system, e.g. OFDM/OQAM-IOTA system · CPC title

• H04L25/03

  Shaping networks in transmitter or receiver, e.g. adaptive shaping networks · CPC title