Signal sending method, signal receiving method, and apparatuses

Patent metadata

Field	Value
Publication number	US-10972977-B2
Application number	US-201916588454-A
Country	US
Kind code	B2
Filing date	Sep 30, 2019
Priority date	Sep 28, 2014
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

The disclosure discloses a high-efficiency short training field sequence generation method, a signal sending method, a signal receiving method, and related apparatuses, where the high-efficiency short training sequence generation method includes: increasing frequency domain density of a frequency domain sequence corresponding to a first high-efficiency short training field sequence to generate a frequency domain sequence with increased frequency domain density; generating a second high-efficiency short training field sequence according to the frequency domain sequence with increased frequency domain density; and using the second high-efficiency short training field sequence as a high-efficiency short training field sequence in a preamble sequence of a data transmission frame in a wireless local area network WLAN. In embodiments of the disclosure, a cycle of a high-efficiency short training field sequence used for performing stage-2 AGC adjustment in the WLAN may be increased, and a maximum CSD value that can be used is further increased.

First claim

What is claimed is:

1. A signal sending method, the method comprising:
generating a first preamble, wherein the first preamble comprises a first high-efficiency short training field, wherein the first high-efficiency short training field occupies at least 4 μs, wherein a duration of 4 μs includes 2.5 cycles, and wherein a length of each cycle is 1600 ns; and
sending the first preamble.

2. The signal sending method according to claim 1 , wherein the first preamble corresponds to a current bandwidth, and the first high-efficiency short training field includes a segment of a second high-efficiency short training field in a second preamble corresponding to a reference bandwidth, and the first high-efficiency short training field in the first preamble corresponding to the current bandwidth includes 2.5 cycles in 4 μs, the length of each cycle of the 2.5 cycles is 1600 ns; and
the method further comprising:
sending the first preamble corresponding to the current bandwidth.

3. The signal sending method according to claim 2 , wherein a sampling rate of the segment of the second high-efficiency short training field in the second preamble corresponding to the reference bandwidth corresponds to the current bandwidth.

4. A signal receiving method, the method comprising:
receiving a first preamble, wherein the first preamble comprises a first high-efficiency short training field, wherein the first high-efficiency short training field occupies at least 4 μs, wherein a duration of 4 μs includes 2.5 cycles, and wherein a length of each cycle is 1600 ns; and
processing signals based on the first high-efficiency short training field.

5. The signal receiving method according to claim 4 ,
wherein the first preamble corresponds to a current bandwidth, and the first high-efficiency short training field includes a segment of a second high-efficiency short training field in a second preamble corresponding to a reference bandwidth, and the first high-efficiency short training field in the first preamble corresponding to the current bandwidth includes 2.5 cycles in 4 μs, the length of each cycle of the 2.5 cycles is 1600 ns; and
the method further comprising:
processing signals based on the first high-efficiency short training field in the first preamble corresponding to the current bandwidth.

6. The signal receiving method according to claim 5 , wherein a sampling rate of the segment of the second high-efficiency short training field in the second preamble corresponding to the reference bandwidth corresponds to the current bandwidth.

7. A signal sending device comprising:
a processor configured to generate a first preamble, wherein the first preamble comprises a first high-efficiency short training field, wherein the first high-efficiency short training field occupies at least 4 μs, wherein a duration of 4 μs includes 2.5 cycles, and wherein a length of each cycle is 1600 ns; and
a transmitter configured to cooperate with the processor to send the first preamble.

8. The signal sending device according to claim 7 ,
wherein the first preamble corresponds to a current bandwidth;
wherein the first high-efficiency short training field includes a segment of a second high-efficiency short training field in a second preamble corresponding to a reference bandwidth, and the first high-efficiency short training field in the first preamble corresponding to the current bandwidth includes 2.5 cycles in 4 μs, the length of each cycle of the 2.5 cycles is 1600 ns; and
wherein the transmitter is configured to cooperate with the processor to send the first preamble corresponding to the current bandwidth.

9. The signal sending device according to claim 8 , wherein a sampling rate of the segment of the second high-efficiency short training field in the second preamble corresponding to the reference bandwidth corresponds to the current bandwidth.

10. A signal receiving device comprising:
a processor; and
a receiver configured to cooperate with the processor to receive a first preamble, wherein the first preamble comprises a first high-efficiency short training field, wherein the first high-efficiency short training field occupies at least 4 μs, wherein a duration of 4 μs includes 2.5 cycles, and wherein a length of each cycle is 1600 ns;
wherein the processor is configured to process signals based on the first high-efficiency short training field.

11. The signal receiving device according to claim 10 ,
wherein the first preamble corresponds to a current bandwidth, and the first high-efficiency short training field includes a segment of a second high-efficiency short training field in a second preamble corresponding to a reference bandwidth, and the first high-efficiency short training field in the first preamble corresponding to the current bandwidth includes 2.5 cycles in 4 μs, the length of each cycle of the 2.5 cycles is 1600 ns; and
wherein the processor is further configured to process signals based on the first high-efficiency short training field in the first preamble corresponding to the current bandwidth.

12. The signal receiving device according to claim 11 , wherein a sampling rate of the segment of the second high-efficiency short training field in the second preamble corresponding to the reference bandwidth corresponds to the current bandwidth.

Assignees

• Huawei Tech Co Ltd

Inventors

• Lin Wei
• Liu Le
• Zhu Jun
• Lu Weishan

Classifications

• H04L27/26132 Primary

  using repetition · CPC title

• H04L27/2613

  Structure of the reference signals · CPC title

• H04L27/2603

  Signal structure ensuring backward compatibility with legacy system · CPC title

• H04W52/0229 Primary

  where the received signal is a wanted signal · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title