Signal sending method, signal receiving method, and apparatuses
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.
1. A signal sending method comprising:
generating a preamble sequence comprising a high-efficiency short training field sequence, wherein the high-efficiency short training field sequence comprises five cycles, wherein the length of each cycle of the five cycles is 1600 ns; and
sending the preamble sequence.
2. The signal sending method according to claim 1 ,
wherein the preamble sequence corresponds to a current bandwidth, and the high-efficiency short training field sequence includes a segment of a high-efficiency short training field sequence in a preamble sequence corresponding to a reference bandwidth, and the high-efficiency short training field sequence in the preamble sequence corresponding to the current bandwidth comprises five cycles, wherein the length of each cycle of the five cycles is 1600 ns; and the method further comprising:
sending the preamble sequence corresponding to the current bandwidth.
3. The signal sending method according to claim 2 , wherein a sampling rate of the segment of the high-efficiency short training field sequence in the preamble sequence corresponding to the reference bandwidth corresponds to the current bandwidth.
4. The signal sending method according to claim 2 , wherein the current bandwidth is 40 MHz, and the high-efficiency short training field sequence corresponding to 40 MHz is [1*L-STF, j*L-STF], wherein the L-STF is [0,0,0,0,0,0,0,0,1+1i,0,0,0,−1−1i,0,0,0,1+1i,0,0,0,−1−1i,0,0,0,−1−1i,0,0,0,1+1i,0,0,0, . . . 0,0,0,−1−1i,0,0,0,−1−1i,0,0,0,1+1i,0,0,0,1+1i,0,0,0,1+1i,0,0,0,1+1i,0,0,0,0,0,0,0].
5. A signal receiving method comprising:
receiving a preamble sequence comprising a high-efficiency short training field sequence, wherein the high-efficiency short training field sequence comprises five cycles, wherein the length of each cycle of the five cycles is 1600 ns; and
processing signals based on the high-efficiency short training field sequence.
6. The signal receiving method according to claim 5 ,
wherein the preamble sequence corresponds to a current bandwidth, and the high-efficiency short training field sequence includes a segment of a high-efficiency short training field sequence in a preamble sequence corresponding to a reference bandwidth, and the high-efficiency short training field sequence in the preamble sequence corresponding to the current bandwidth comprises five cycles, wherein the length of each cycle of the five cycles is 1600 ns; and the method further comprising:
processing signals based on the high-efficiency short training field sequence in the preamble sequence corresponding to the current bandwidth.
7. The signal receiving method according to claim 6 , wherein a sampling rate of the segment of the high-efficiency short training field sequence in the preamble sequence corresponding to the reference bandwidth corresponds to the current bandwidth.
8. The signal receiving method according to claim 6 , the current bandwidth is 40 MHz, and the high-efficiency short training field sequence corresponding to 40 MHz is [1*L-STF, j*L-STF], wherein the L-STF is [0,0,0,0,0,0,0,0,1+1i,0,0,0,−1−1i,0,0,0,1+1i,0,0,0,−1−1i,0,0,0,−1−1i,0,0,0,1+1i,0,0,0, . . . 0,0,0,−1−1i,0,0,0,−1−1i,0,0,0,1+1i,0,0,0,1+1i,0,0,0,1+1i,0,0,0,1+1i,0,0,0,0,0,0,0].
9. A signal sending device comprising:
a processor configured to generate a preamble sequence comprising a high-efficiency short training field sequence, wherein the high-efficiency short training field sequence comprises five cycles, wherein the length of each cycle of the five cycles is 1600 ns; and
a transmitter configured to cooperate with the processor to send the preamble sequence.
10. The signal sending device according to claim 9 ,
wherein the preamble sequence corresponds to a current bandwidth, wherein the high-efficiency short training field sequence includes a segment of a high-efficiency short training field sequence in a preamble sequence corresponding to a reference bandwidth, and the high-efficiency short training field sequence in the preamble sequence corresponding to the current bandwidth comprises five cycles, wherein the length of each cycle of the five cycles is 1600 ns; and
wherein the transmitter is configured to cooperate with the processor to send the preamble sequence corresponding to the current bandwidth.
11. The signal sending device according to claim 10 , wherein a sampling rate of the segment of the high-efficiency short training field sequence in the preamble sequence corresponding to the reference bandwidth corresponds to the current bandwidth.
12. The signal sending device according to claim 10 , the current bandwidth is 40 MHz, and the high-efficiency short training field sequence corresponding to 40 MHz is [1*L-STF, j*L-STF], wherein the L-STF is [0,0,0,0,0,0,0,0,1+1i,0,0,0,−1−1i,0,0,0,1+1i,0,0,0,−1−1i,0,0,0,−1−1i,0,0,0,1+1i,0,0,0, . . . 0,0,0,−1−1i,0,0,0,−1−1i,0,0,0, 1+1i,0,0,0,1+1i,0,0,0,1+1i,0,0,0,1+1i,0,0,0,0,0,0,0].
13. A signal receiving device comprising:
a processor; and
a receiver configured to cooperate with the processor to receive a preamble sequence comprising a high-efficiency short training field sequence, wherein the high-efficiency short training field sequence comprises five cycles, wherein the length of each cycle of the five cycles is 1600 ns;
wherein the processor is configured to process signals based on the high-efficiency short training field sequence.
14. The signal receiving device according to claim 13 ,
wherein the preamble sequence corresponds to a current bandwidth, wherein the high-efficiency short training field sequence includes a segment of a high-efficiency short training field sequence in a preamble sequence corresponding to a reference bandwidth, and the high-efficiency short training field sequence in a preamble sequence corresponding to the current bandwidth comprises five cycles, wherein the length of each cycle of the five cycles is 1600 ns; and
wherein the processor is further configured to process signals based on the high-efficiency short training field sequence in the preamble sequence corresponding to the current bandwidth.
15. The signal receiving device according to claim 14 , wherein a sampling rate of the segment of the high-efficiency short training field sequence in the preamble sequence corresponding to the reference bandwidth corresponds to the current bandwidth.
16. The signal receiving device according to claim 14 , the current bandwidth is 40 MHz, and the high-efficiency short training field sequence corresponding to 40 MHz is [1*L-STF, j*L-STF], wherein the L-STF is [0,0,0,0,0,0,0,0,1+1i,0,0,0,−1−1i,0,0,0,1+1i,0,0,0,−1−1i,0,0,0,−1−1i,0,0,0,1+1i,0,0,0, . . . 0,0,0,−1−1i,0,0,0,−1−1i,0,0,0, 1+1i,0,0,0,1+1i,0,0,0,1+1i,0,0,0,1+1i,0,0,0,0,0,0,0].