IP Library › Granted Patent US 12,401,556

Granted Patent B2

US 12,401,556 · App. 18/161,141 · Granted Aug 26, 2025

EHT-LTF sequence transmission method and related apparatus

Inventors: Chenchen Liu (Shenzhen, CN); Dandan Liang (Shenzhen, CN); Ming Gan (Shenzhen, CN)

Assignee: HUAWEI TECHNOLOGIES CO., LTD.

H04L27/262 H04W84/12

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Quick Facts

Patent No.: US 12,401,556
App. No.: 18/161,141
Granted: Aug 26, 2025
Kind: B2

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Abstract

A method for transmitting an extremely high throughput long training field (EHT-LTF) sequence includes: A first communication device generates and sends an extremely high throughput physical layer protocol data unit (EHT PPDU), where the EHT PPDU includes an EHT-LTF; and correspondingly, a second communication device receives the EHT PPDU, and parses the EHT-LTF in the received EHT PPDU. In this way, an LTF sequence can be designed for the IEEE 802.11be standard, and a PAPR value of the LTF sequence on a resource unit can be reduced.

Claims (158)

1. A method for transmitting an extremely high throughput long training field (EHT-LTF) sequence, comprising:

generating, by a first communication device, an extremely high throughput physical layer protocol data unit (EHT PPDU), wherein the EHT PPDU comprises an EHT-LTF; and

sending, by the first communication device, the EHT PPDU,

wherein a 2x EHT-LTF sequence in an 80 MHz bandwidth is calculated according to the following equation:

2xEHT-LTF80 MHZ=[2xHE-LTF80 MHz_part1, 2xNew_partA, 2xHE-LTF80 MHz_part2_Reverse, 2xNew_partB, 2xHE-LTF80 MHz_part4_Reverse, 2xNew_partC, 2xHE-LTF80 MHZ_part5], wherein

2xNew_partA is equal to [1, 0, −1, 0, 1], 2xNew_partB is equal to [0, 1, 0, −1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, −1, 0, 1, 0, −1, 0, 1, 0], and 2xNew_partC is equal to [−1, 0, 1, 0, 1]; and

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHZ_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHz (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHz (−258:−17), 2xHE-LTF80 MHZ_part4 is equal to 2xHE-LTF80 MHZ (17:258), and 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHZ (259:500);

wherein a 4xEHT-LTF sequence in an 80 MHz bandwidth is calculated according to the following equation:

4xEHT-LTF80 MHZ=[4xHE-LTF80 MHZ_part1, 4xNew_partA, 4xHE-LTF80 MHz_part2_Reverse, 4xNew_partB, 4xHE-LTF80 MHz_part4_Reverse, 4xNew_partC, (−1)*4xHE-LTF80 MHz_part5], wherein

4xNew_partA is equal to [−1, −1, −1, −1, 1], 4xNew_partB is equal to [1, −1, −1, −1, 1, 1, −1, 1, −1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, −1, 1, 1], and 4xNew_partC is equal to [−1, 1, −1, 1, −1]; and

4xHE-LTF80 MHz_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHZ_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHz (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHz (−258:−17), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHZ (17:258), and 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHZ (259:500);

wherein a 2xEHT-LTF sequence and a 4xEHT-LTF sequence in an 80 MHz bandwidth are calculated respectively according to the following equations:

2xEHT-LTF80 MHz=[2xHE-LTF80 MHZ_part1, 2xHE-LTF80 MHz_part2_Reverse, 2xHE-LTF80 MHZ_part3, 2xHE-LTF80 MHz_part4_Reverse, 2xHE-LTF80 MHZ_part5]; and

4xEHT-LTF80 MHZ=[4xHE-LTF80 MHz_part1, 4xHE-LTF80 MHz_part2_Reverse, 4xHE-LTF80 MHZ_part3, 4xHE-LTF80 MHz_part4_Reverse, 4xHE-LTF80 MHz_part5],

wherein 2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHz (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHZ (−258:−12), 2xHE-LTF80 MHz_part3 is equal to 2xHE-LTF80 MHZ (−11:11), 2xHE-LTF80 MHZ_part4 is equal to 2xHE-LTF80 MHZ (12:258), and the 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHz (259:500); and

4xHE-LTF80 MHz_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHZ_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHz (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHZ (−258:−12), 4xHE-LTF80 MHZ_part3 is equal to 4xHE-LTF80 MHZ (−11:11), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHZ (12:258), and the 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHz (259:500); or

wherein a 2xEHT-LTF sequence and a 4xEHT-LTF sequence in a 160 MHz bandwidth are calculated respectively according to the following equations:

2xEHT-LTF160 MHZ=[2xEHT-LTF80 MHz_part1, 2xEHT-LTF80 MHZ_part2, (−1)*2xEHT-LTF80 MHz_part3, (−1)*2xEHT-LTF80 MHz_part4, 0 23 , 2xEHT-LTF80 MHz_part1, 2xEHT-LTF80 MHz_part2, 2xEHT-LTF80 MHz_part3, 2xEHT-LTF80 MHz_part4]; and

4xEHT-LTF160 MHZ=[4xEHT-LTF80 MHz_part1, 4xEHT-LTF80 MHZ_part2, (−1)*4xEHT-LTF80 MHZ_part3, 4xEHT-LTF80 MHZ_part4, 0 23 , 4xEHT-LTF80 MHz_part1, (−1)*4xEHT-LTF80 MHz_part2, 4xEHT-LTF80 MHz_part3, 4xEHT-LTF80 MHz_part4], wherein

2xEHT-LTF80 MHz_part1 is equal to 2xEHT-LTF80 MHz (−500:−257), 2xEHT-LTF80 MHz_part2 is equal to 2xEHT-LTF80 MHZ (−256:−1), 2xEHT-LTF80 MHZ_part3 is equal to 2xEHT-LTF80 MHZ (0:255), and the 2xEHT-LTF80 MHZ_part4 is equal to 2xEHT-LTF80 MHZ (256:500); and

4xEHT-LTF80 MHz_part1 is equal to 4xEHT-LTF80 MHz (−500:−257), 4xEHT-LTF80 MHz_part2 is equal to 4xEHT-LTF80 MHZ (−256:−1), 4xEHT-LTF80 MHZ_part3 is equal to 4xEHT-LTF80 MHZ (0:255), and the 4xEHT-LTF80 MHZ_part4 is equal to 4xEHT-LTF80 MHZ (256:500).

2. The method according to claim 1 , wherein the 2xEHT-LTF sequence in the 80 MHz bandwidth is calculated according to the equation:

2xEHT-LTF80 MHz=[2xHE-LTF80 MHz_part1, 2xNew_partA, 2xHE-LTF80 MHz_part2_Reverse, 2xNew_partB, 2xHE-LTF80 MHz_part4_Reverse, 2xNew_partC, 2xHE-LTF80 MHz_part5], wherein

2xNew_partA is equal to [1, 0, −1, 0, 1], 2xNew_partB is equal to [0, 1, 0, −1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, −1, 0, 1, 0, −1, 0, 1, 0], and 2xNew_partC is equal to [−1, 0, 1, 0, 1]; and

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHz (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHz (−258:−17), 2xHE-LTF80 MHz_part4 is equal to 2xHE-LTF80 MHz (17:258), and 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHz (259:500).

3. The method according to claim 1 , wherein the 4xEHT-LTF sequence in the 80 MHz bandwidth is calculated according to the equation:

4xEHT-LTF80 MHz=[4xHE-LTF80 MHz_part1, 4xNew_partA, 4xHE-LTF80 MHz_part2_Reverse, 4xNew_partB, 4xHE-LTF80 MHz_part4_Reverse, 4xNew_partC, (−1)*4xHE-LTF80 MHz_part5], wherein

4xHE-LTF80 MHz_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHz_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHz (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHz (−258:−17), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHz (17:258), and 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHz (259:500).

4. The method according to claim 1 , wherein the 2xEHT-LTF sequence and the 4xEHT-LTF sequence in an 80 MHz bandwidth are calculated respectively according to the equations:

2xEHT-LTF80 MHz=[2xHE-LTF80 MHz_part1, 2xHE-LTF80 MHz_part2_Reverse, 2xHE-LTF80 MHz_part3, 2xHE-LTF80 MHz_part4_Reverse, 2xHE-LTF80 MHz_part5]; and

4xEHT-LTF80 MHz=[4xHE-LTF80 MHz_part1, 4xHE-LTF80 MHz_part2_Reverse, 4xHE-LTF80 MHz_part3, 4xHE-LTF80 MHz_part4_Reverse, 4xHE-LTF80 MHz_part5], wherein

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHz (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHz (−258:−12), 2xHE-LTF80 MHz_part3 is equal to 2xHE-LTF80 MHz (−11:11), 2xHE-LTF80 MHz_part4 is equal to 2xHE-LTF80 MHz (12:258), and the 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHz (259:500); and

4xHE-LTF80 MHz_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHz_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHz (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHz (−258:−12), 4xHE-LTF80 MHz_part3 is equal to 4xHE-LTF80 MHz (−11:11), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHz (12:258), and the 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHz (259:500).

5. The method according to claim 1 , wherein the 2xEHT-LTF sequence and the 4xEHT-LTF sequence in a 160 MHz bandwidth are calculated respectively according to the equations:

2xEHT-LTF160 MHz=[2xEHT-LTF80 MHz_part1, 2xEHT-LTF80 MHz_part2, (−1)*2xEHT-LTF80 MHz_part3, (−1)*2xEHT-LTF80 MHz_part4, 0 23 , 2xEHT-LTF80 MHz_part1, 2xEHT-LTF80 MHz_part2, 2xEHT-LTF80 MHz_part3, 2xEHT-LTF80 MHz_part4]; and

4xEHT-LTF160 MHz=[4xEHT-LTF80 MHz_part1, 4xEHT-LTF80 MHz_part2, (−1)*4xEHT-LTF80 MHz_part3, 4xEHT-LTF80 MHz_part4, 0 23 , 4xEHT-LTF80 MHz_part1, (−1)*4xEHT-LTF80 MHz_part2, 4xEHT-LTF80 MHz_part3, 4xEHT-LTF80 MHz_part4], wherein

2xEHT-LTF80 MHz_part1 is equal to 2xEHT-LTF80 MHz (−500:−257), 2xEHT-LTF80 MHz_part2 is equal to 2xEHT-LTF80 MHz (−256:−1), 2xEHT-LTF80 MHz_part3 is equal to 2xEHT-LTF80 MHz (0:255), and the 2xEHT-LTF80 MHz_part4 is equal to 2xEHT-LTF80 MHz (256:500); and

4xEHT-LTF80 MHz_part1 is equal to 4xEHT-LTF80 MHz (−500:−257), 4xEHT-LTF80 MHz_part2 is equal to 4xEHT-LTF80 MHz (−256:−1), 4xEHT-LTF80 MHz_part3 is equal to 4xEHT-LTF80 MHz (0:255), and the 4xEHT-LTF80 MHz_part4 is equal to 4xEHT-LTF80 MHz (256:500).

6. A method for transmitting an extremely high throughput long training field (EHT-LTF) sequence, comprising:

receiving, by a second communication device, an extremely high throughput physical layer protocol data unit (EHT PPDU), wherein the EHT PPDU comprises an EHT-LTF; and

parsing, by the second communication device, the EHT-LTF in the EHT PPDU,

wherein a 2xEHT-LTF sequence in an 80 MHz bandwidth is calculated according to the following equation:

2xEHT-LTF80 MHZ=[2xHE-LTF80 MHz_part1, 2xNew_partA, 2xHE-LTF80 MHZ_part2_Reverse, 2xNew_partB, 2xHE-LTF80 MHz_part4_Reverse, 2xNew_partC, 2xHE-LTF80 MHZ_part5], wherein

2xNew_partA is equal to [1, 0, −1, 0, 1], 2xNew_partB is equal to [0, 1, 0, −1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, −1, 0, 1, 0, −1, 0, 1, 0], and 2xNew_partC is equal to [−1, 0, 1, 0, 1]; and

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHZ_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHZ (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHz (−258:−17), 2xHE-LTF80 MHZ_part4 is equal to 2xHE-LTF80 MHZ (17:258), and 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHZ (259:500);

wherein a 4xEHT-LTF sequence in an 80 MHz bandwidth is calculated according to the following equation:

4xEHT-LTF80 MHZ=[4xHE-LTF80 MHZ_part1, 4xNew_partA, 4xHE-LTF80 MHz_part2_Reverse, 4xNew_partB, 4xHE-LTF80 MHz_part4_Reverse, 4xNew_partC, (−1)*4xHE-LTF80 MHZ_part5], wherein

4xHE-LTF80 MHz_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHz_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHZ (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHz (−258:−17), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHz (17:258), and 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHz (259:500);

wherein a 2xEHT-LTF sequence and a 4xEHT-LTF sequence in an 80 MHz bandwidth are calculated respectively according to the following equations:

2xEHT-LTF80 MHZ=[2xHE-LTF80 MHZ_part1, 2xHE-LTF80 MHz_part2_Reverse, 2xHE-LTF80 MHZ_part3, 2xHE-LTF80 MHz_part4_Reverse, 2xHE-LTF80 MHz_part5]; and

4xEHT-LTF80 MHZ [4xHE-LTF80 MHz_part1, 4xHE-LTF80 MHz_part2_Reverse, 4xHE-LTF80 MHz_part3, 4xHE-LTF80 MHz_part4_Reverse, 4xHE-LTF80 MHZ_part5], wherein

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHZ_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHZ_part1 is equal to 2xHE-LTF80 MHZ (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHZ (−258:−12), 2xHE-LTF80 MHz_part3 is equal to 2xHE-LTF80 MHZ (−11:11), 2xHE-LTF80 MHz_part4 is equal to 2xHE-LTF80 MHZ (12:258), and the 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHZ (259:500); and

4xHE-LTF80 MHz_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHZ_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHz (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHz (−258:−12), 4xHE-LTF80 MHz_part3 is equal to 4xHE-LTF80 MHz (−11:11), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHZ (12:258), and the 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHZ (259:500); or

wherein a 2xEHT-LTF sequence and a 4xEHT-LTF sequence in a 160 MHz bandwidth are calculated respectively according to the following equations:

4xEHT-LTF160 MHz=[4xEHT-LTF80 MHz_part1, 4xEHT-LTF80 MHz_part2, (−1)*4xEHT-LTF80 MHz_part3, 4xEHT-LTF80 MHz_part4, 0 23 , 4xEHT-LTF80 MHz_part1, (−1)*4xEHT-LTF80 MHZ_part2, 4xEHT-LTF80 MHz_part3, 4xEHT-LTF80 MHz_part4], wherein

2xEHT-LTF80 MHz_part1 is equal to 2xEHT-LTF80 MHZ (−500:−257), 2xEHT-LTF80 MHz_part2 is equal to 2xEHT-LTF80 MHz (−256:−1), 2xEHT-LTF80 MHZ_part3 is equal to 2xEHT-LTF80 MHz (0:255), and the 2xEHT-LTF80 MHz_part4 is equal to 2xEHT-LTF80 MHZ (256:500); and

4xEHT-LTF80 MHz_part1 is equal to 4xEHT-LTF80 MHz (−500:−257), 4xEHT-LTF80 MHz_part2 is equal to 4xEHT-LTF80 MHz (−256:−1), 4xEHT-LTF80 MHZ_part3 is equal to 4xEHT-LTF80 MHz (0:255), and the 4xEHT-LTF80 MHz_part4 is equal to 4xEHT-LTF80 MHZ (256:500).

7. The method according to claim 6 , wherein the 2xEHT-LTF sequence in the 80 MHz bandwidth is calculated according to the equation:

2xEHT-LTF80 MHz [2xHE-LTF80 MHz_part1, 2xNew_partA, 2xHE-LTF80 MHz_part2_Reverse, 2xNew_partB, 2xHE-LTF80 MHz_part4_Reverse, 2xNew_partC, 2xHE-LTF80 MHz_part5], wherein

2xNew_partA is equal to [1, 0, −1, 0, 1], 2xNew_partB is equal to [0, 1, 0, −1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, −1, 0, 1, 0, −1, 0, 1, 0], and 2xNew_partC is equal to [−1, 0, 1, 0, 1]; and

8. The method according to claim 6 , wherein the 4xEHT-LTF sequence in the 80 MHz bandwidth is calculated according to the equation:

4xEHT-LTF80 MHz [4xHE-LTF80 MHz_part1, 4xNew_partA, 4xHE-LTF80 MHz_part2_Reverse, 4xNew_partB, 4xHE-LTF80 MHz_part4_Reverse, 4xNew_partC, (−1)*4xHE-LTF80 MHz_part5], wherein

9. The method according to claim 6 , wherein the 2xEHT-LTF sequence and the 4xEHT-LTF sequence in an 80 MHz bandwidth are calculated respectively according to the equations:

2xEHT-LTF80 MHz=[2xHE-LTF80 MHz_part1, 2xHE-LTF80 MHz_part2_Reverse, 2xHE-LTF80 MHz_part3, 2xHE-LTF80 MHz_part4_Reverse, 2xHE-LTF80 MHz_part5]; and

4xEHT-LTF80 MHZ=[4xHE-LTF80 MHz_part1, 4xHE-LTF80 MHz_part2_Reverse, 4xHE-LTF80 MHz_part3, 4xHE-LTF80 MHz_part4_Reverse, 4xHE-LTF80 MHz_part5], wherein

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHz (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHz (−258:−12), 2xHE-LTF80 MHz_part3 is equal to 2xHE-LTF80 MHz (−11:11), 2xHE-LTF80 MHz_part4 is equal to 2xHE-LTF80 MHz (12:258), and the 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHz (259:500); and

4xHE-LTF80 MHz_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHz_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHz (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHz (−258:−12), 4xHE-LTF80 MHz_part3 is equal to 4xHE-LTF80 MHz (−11:11), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHz (12:258), and the 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHz (259:500).

10. The method according to claim 6 , wherein the 2xEHT-LTF sequence and the 4xEHT-LTF sequence in a 160 MHz bandwidth are calculated respectively according to the equations:

11. An apparatus, applied for a first communication device, comprising:

at least one processor, and a memory storing instructions that, when executed by the at least one processor, cause the first communication device to perform operations comprising:

generating an extremely high throughput physical layer protocol data unit (EHT PPDU), wherein the EHT PPDU comprises an EHT-LTF; and

sending the EHT PPDU,

wherein a 2xEHT-LTF sequence in an 80 MHz bandwidth is calculated according to the following equation:

2xEHT-LTF80 MHZ=[2xHE-LTF80 MHZ_part1, 2xNew_partA, 2xHE-LTF80 MHz_part2_Reverse, 2xNew_partB, 2xHE-LTF80 MHz_part4_Reverse, 2xNew_partC, 2xHE-LTF80 MHZ_part5], wherein

2xNew_partA is equal to [1, 0, −1, 0, 1], 2xNew_partB is equal to [0, 1, 0, −1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, −1, 0, 1, 0, −1, 0, 1, 0], and 2xNew_partC is equal to [−1, 0, 1, 0, 1]; and

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHz (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHZ (−258:−17), 2xHE-LTF80 MHZ_part4 is equal to 2xHE-LTF80 MHZ (17:258), and 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHZ (259:500);

wherein a 4xEHT-LTF sequence in an 80 MHz bandwidth is calculated according to the following equation:

4xEHT-LTF80 MHZ=[4xHE-LTF80 MHZ_part1, 4xNew_partA, 4xHE-LTF80 MHz_part2_Reverse, 4xNew_partB, 4xHE-LTF80 MHZ_part4_Reverse, 4xNew_partC, (−1)*4xHE-LTF80 MHZ_part5], wherein

4xHE-LTF80 MHZ_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHZ_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHZ (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHz (−258:−17), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHz (17:258), and 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHZ (259:500);

wherein a 2xEHT-LTF sequence and a 4xEHT-LTF sequence in an 80 MHz bandwidth are calculated respectively according to the following equations:

2xEHT-LTF80 MHZ=[2xHE-LTF80 MHz_part1, 2xHE-LTF80 MHz_part2_Reverse, 2xHE-LTF80 MHz_part3, 2xHE-LTF80 MHz_part4_Reverse, 2xHE-LTF80 MHZ_part5]; and

4xEHT-LTF80 MHZ=[4xHE-LTF80 MHZ_part1, 4xHE-LTF80 MHz_part2_Reverse, 4xHE-LTF80 MHZ_part3, 4xHE-LTF80 MHz_part4_Reverse, 4xHE-LTF80 MHz_part5], wherein

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHZ_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHz (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHz (−258:−12), 2xHE-LTF80 MHz_part3 is equal to 2xHE-LTF80 MHz (−11:11), 2xHE-LTF80 MHz_part4 is equal to 2xHE-LTF80 MHz (12:258), and the 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHz (259:500); and

4xHE-LTF80 MHz_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHz_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHZ (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHz (−258:−12), 4xHE-LTF80 MHZ_part3 is equal to 4xHE-LTF80 MHZ (−11:11), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHZ (12:258), and the 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHZ (259:500); or

wherein a 2xEHT-LTF sequence and a 4xEHT-LTF sequence in a 160 MHz bandwidth are calculated respectively according to the following equations:

2xEHT-LTF160 MHZ=[2xEHT-LTF80 MHz_part1, 2xEHT-LTF80 MHz_part2, (−1)*2xEHT-LTF80 MHZ_part3, (−1)*2xEHT-LTF80 MHZ_part4, 0 23 , 2xEHT-LTF80 MHz_part1, 2xEHT-LTF80 MHz_part2, 2xEHT-LTF80 MHz_part3, 2xEHT-LTF80 MHz_part4]; and

4xEHT-LTF160 MHz=[4xEHT-LTF80 MHZ_part1, 4xEHT-LTF80 MHz_part2, (−1)*4xEHT-LTF80 MHz_part3, 4xEHT-LTF80 MHz_part4, 0 23 , 4xEHT-LTF80 MHz_part1, (−1)*4xEHT-LTF80 MHz_part2, 4xEHT-LTF80 MHz_part3, 4xEHT-LTF80 MHz_part4], wherein

2xEHT-LTF80 MHz_part1 is equal to 2xEHT-LTF80 MHZ (−500:−257), 2xEHT-LTF80 MHz_part2 is equal to 2xEHT-LTF80 MHz (−256:−1), 2xEHT-LTF80 MHz_part3 is equal to 2xEHT-LTF80 MHZ (0:255), and the 2xEHT-LTF80 MHz_part4 is equal to 2xEHT-LTF80 MHz (256:500); and

4xEHT-LTF80 MHz_part1 is equal to 4xEHT-LTF80 MHz (−500:−257), 4xEHT-LTF80 MHz_part2 is equal to 4xEHT-LTF80 MHZ (−256:−1), 4xEHT-LTF80 MHZ_part3 is equal to 4xEHT-LTF80 MHz (0:255), and the 4xEHT-LTF80 MHZ_part4 is equal to 4xEHT-LTF80 MHZ (256:500).

12. The apparatus according to claim 11 , wherein the 2xEHT-LTF sequence in the 80 MHz bandwidth is calculated according to the following equation:

2xEHT-LTF80 MHz [2xHE-LTF80 MHz_part1, 2xNew_partA, 2xHE-LTF80 MHz_part2_Reverse, 2xNew_partB, 2xHE-LTF80 MHz_part4_Reverse, 2xNew_partC, 2xHE-LTF80 MHz_part5], wherein

2xNew_partA is equal to [1, 0, −1, 0, 1], 2xNew_partB is equal to [0, 1, 0, −1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, −1, 0, 1, 0, −1, 0, 1, 0], and 2xNew_partC is equal to [−1, 0, 1, 0, 1]; and

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHz (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHz (−258:−17), 2xHE-LTF80 MHz_part4 is equal to 2xHE-LTF80 MHZ (17:258), and 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHz (259:500).

13. The apparatus according to claim 11 , wherein the 4xEHT-LTF sequence in the 80 MHz bandwidth is calculated according to the equation:

4xEHT-LTF80 MHz=[4xHE-LTF80 MHz_part1, 4xNew_partA, 4xHE-LTF80 MHz_part2_Reverse, 4xNew_partB, 4xHE-LTF80 MHz_part4_Reverse, 4xNew_partC, (−1)*4xHE-LTF80 MHz_part5], wherein

14. The apparatus according to claim 11 , wherein the 2xEHT-LTF sequence and the 4xEHT-LTF sequence in an 80 MHz bandwidth are calculated respectively according to the equations:

2xEHT-LTF80 MHz=[2xHE-LTF80 MHz_part1, 2xHE-LTF80 MHz_part2_Reverse, 2xHE-LTF80 MHz_part3, 2xHE-LTF80 MHz_part4_Reverse, 2xHE-LTF80 MHz_part5]; and

4xEHT-LTF80 MHz=[4xHE-LTF80 MHz_part1, 4xHE-LTF80 MHz_part2_Reverse, 4xHE-LTF80 MHz_part3, 4xHE-LTF80 MHz_part4_Reverse, 4xHE-LTF80 MHz_part5], wherein

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHz (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHz (−258:−12), 2xHE-LTF80 MHz_part3 is equal to 2xHE-LTF80 MHz (−11:11), 2xHE-LTF80 MHz_part4 is equal to 2xHE-LTF80 MHz (12:258), and the 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHz (259:500); and

4xHE-LTF80 MHz_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHz_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHz (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHz (−258:−12), 4xHE-LTF80 MHz_part3 is equal to 4xHE-LTF80 MHz (−11:11), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHz (12:258), and the 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHz (259:500).

15. The apparatus according to claim 11 , wherein the 2xEHT-LTF sequence and the 4xEHT-LTF sequence in a 160 MHz bandwidth are calculated respectively according to the equations:

16. An apparatus, applied for a second communication device, comprising:

at least one processor, and a memory storing instructions that, when executed by the at least one processor, cause the apparatus to perform operations comprising:

receiving an extremely high throughput physical layer protocol data unit (EHT PPDU), wherein the EHT PPDU comprises an EHT-LTF; and

parsing the EHT-LTF in the EHT PPDU,

wherein a 2x EHT-LTF sequence in an 80 MHz bandwidth is calculated according to the following equations:

2xEHT-LTF80 MHZ=[2xHE-LTF80 MHZ_part1, 2xNew_partA, 2xHE-LTF80 MHz_part2_Reverse, 2xNew_partB, 2xHE-LTF80 MHz_part4_Reverse, 2xNew_partC, 2xHE-LTF80 MHZ_part5], wherein

2xNew_partA is equal to [1, 0, −1, 0, 1], 2xNew_partB is equal to [0, 1, 0, −1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, −1, 0, 1, 0, −1, 0, 1, 0], and 2xNew_partC is equal to [−1, 0, 1, 0, 1]; and

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHZ (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHZ (−258:−17), 2xHE-LTF80 MHz_part4 is equal to 2xHE-LTF80 MHZ (17:258), and 2xHE-LTF80 MHZ_part5 is equal to 2xHE-LTF80 MHZ (259:500);

wherein a 4xEHT-LTF sequence in an 80 MHz bandwidth is calculated according to the following equation:

4xEHT-LTF80 MHZ=[4xHE-LTF80 MHz_part1, 4xNew_partA, 4xHE-LTF80 MHz_part2_Reverse, 4xNew_partB, 4xHE-LTF80 MHz_part4_Reverse, 4xNew_partC, (−1)*4xHE-LTF80 MHZ_part5], wherein

4xHE-LTF80 MHz_part2_Reverse indicates that 4xHE-LTF80 MHZ_part2 is arranged in a reverse order, and 4xHE-LTF80 MHZ_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHZ (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHz (−258:−17), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHZ (17:258), and 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHZ (259:500);

wherein a 2xEHT-LTF sequence and a 4xEHT-LTF sequence in an 80 MHz bandwidth are calculated respectively according to the following equations:

2xEHT-LTF80 MHZ=[2xHE-LTF80 MHZ_part1, 2xHE-LTF80 MHz_part2_Reverse, 2xHE-LTF80 MHZ_part3, 2xHE-LTF80 MHz_part4_Reverse, 2xHE-LTF80 MHZ_part5]; and

4xEHT-LTF80 MHZ [4xHE-LTF80 MHZ_part1, 4xHE-LTF80 MHz_part2_Reverse, 4xHE-LTF80 MHZ_part3, 4xHE-LTF80 MHz_part4_Reverse, 4xHE-LTF80 MHZ_part5], wherein

2xHE-LTF80 MHZ_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHz (−500:−259), 2xHE-LTF80 MHZ_part2 is equal to 2xHE-LTF80 MHz (−258:−12), 2xHE-LTF80 MHz_part3 is equal to 2xHE-LTF80 MHZ (−11:11), 2xHE-LTF80 MHz_part4 is equal to 2xHE-LTF80 MHZ (12:258), and the 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHZ (259:500); and

4xHE-LTF80 MHZ_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHZ_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHZ_part1 is equal to 4xHE-LTF80 MHz (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHZ (−258:−12), 4xHE-LTF80 MHZ_part3 is equal to 4xHE-LTF80 MHZ (−11:11), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHZ (12:258), and the 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHz (259:500); or

wherein a 2xEHT-LTF sequence and a 4xEHT-LTF sequence in a 160 MHz bandwidth are calculated respectively according to the following equations:

2xEHT-LTF160 MHz=[2xEHT-LTF80 MHz_part1, 2xEHT-LTF80 MHZ_part2, (−1)*2xEHT-LTF80 MHZ_part3, (−1)*2xEHT-LTF80 MHZ_part4, 0 23 , 2xEHT-LTF80 MHz_part1, 2xEHT-LTF80 MHz_part2, 2xEHT-LTF80 MHZ_part3, 2xEHT-LTF80 MHz_part4]; and

4xEHT-LTF160 MHz=[4xEHT-LTF80 MHz_part1, 4xEHT-LTF80 MHZ_part2, (−1)*4xEHT-LTF80 MHZ_part3, 4xEHT-LTF80 MHz_part4, 0 23 , 4xEHT-LTF80 MHz_part1, (−1)*4xEHT-LTF80 MHz_part2, 4xEHT-LTF80 MHZ_part3, 4xEHT-LTF80 MHZ_part4], wherein

2xEHT-LTF80 MHZ_part1 is equal to 2xEHT-LTF80 MHZ (−500:−257), 2xEHT-LTF80 MHz_part2 is equal to 2xEHT-LTF80 MHz (−256:−1), 2xEHT-LTF80 MHZ_part3 is equal to 2xEHT-LTF80 MHz (0:255), and the 2xEHT-LTF80 MHz_part4 is equal to 2xEHT-LTF80 MHz (256:500); and

17. The apparatus according to claim 16 , wherein the 2xEHT-LTF sequence in the 80 MHz bandwidth is calculated according to the equations:

2xEHT-LTF80 MHz [2xHE-LTF80 MHz_part1, 2xNew_partA, 2xHE-LTF80 MHz_part2_Reverse, 2xNew_partB, 2xHE-LTF80 MHz_part4_Reverse, 2xNew_partC, 2xHE-LTF80 MHz_part5], wherein

2xNew_partA is equal to [1, 0, −1, 0, 1], 2xNew_partB is equal to [0, 1, 0, −1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, −1, 0, 1, 0, −1, 0, 1, 0], and 2xNew_partC is equal to [−1, 0, 1, 0, 1]; and

18. The apparatus according to claim 16 , wherein the 4xEHT-LTF sequence in the 80 MHz bandwidth is calculated according to the equation:

4xEHT-LTF80 MHZ [4xHE-LTF80 MHz_part1, 4xNew_partA, 4xHE-LTF80 MHz_part2_Reverse, 4xNew_partB, 4xHE-LTF80 MHz_part4_Reverse, 4xNew_partC, (−1)*4xHE-LTF80 MHz_part5], wherein

19. The apparatus according to claim 16 , wherein the 2xEHT-LTF sequence and the 4xEHT-LTF sequence in an 80 MHz bandwidth are calculated respectively according to the equations:

2xEHT-LTF80 MHz=[2xHE-LTF80 MHz_part1, 2xHE-LTF80 MHz_part2_Reverse, 2xHE-LTF80 MHz_part3, 2xHE-LTF80 MHz_part4_Reverse, 2xHE-LTF80 MHz_part5]; and

4xEHT-LTF80 MHz=[4xHE-LTF80 MHz_part1, 4xHE-LTF80 MHz_part2_Reverse, 4xHE-LTF80 MHz_part3, 4xHE-LTF80 MHz_part4_Reverse, 4xHE-LTF80 MHz_part5], wherein

2xHE-LTF80 MHz_part2_Reverse indicates that 2xHE-LTF80 MHz_part2 is arranged in a reverse order, and 2xHE-LTF80 MHz_part4_Reverse indicates that 2xHE-LTF80 MHz_part4 is arranged in a reverse order, 2xHE-LTF80 MHz_part1 is equal to 2xHE-LTF80 MHz (−500:−259), 2xHE-LTF80 MHz_part2 is equal to 2xHE-LTF80 MHz (−258:−12), 2xHE-LTF80 MHz_part3 is equal to 2xHE-LTF80 MHz (−11:11), 2xHE-LTF80 MHz_part4 is equal to 2xHE-LTF80 MHz (12:258), and the 2xHE-LTF80 MHz_part5 is equal to 2xHE-LTF80 MHz (259:500); and

4xHE-LTF80 MHz_part2_Reverse indicates that 4xHE-LTF80 MHz_part2 is arranged in a reverse order, and 4xHE-LTF80 MHz_part4_Reverse indicates that 4xHE-LTF80 MHz_part4 is arranged in a reverse order, 4xHE-LTF80 MHz_part1 is equal to 4xHE-LTF80 MHz (−500:−259), 4xHE-LTF80 MHz_part2 is equal to 4xHE-LTF80 MHz (−258:−12), 4xHE-LTF80 MHz_part3 is equal to 4xHE-LTF80 MHz (−11:11), 4xHE-LTF80 MHz_part4 is equal to 4xHE-LTF80 MHz (12:258), and the 4xHE-LTF80 MHz_part5 is equal to 4xHE-LTF80 MHz (259:500).

20. The apparatus according to claim 16 , wherein the 2xEHT-LTF sequence and the 4xEHT-LTF sequence in a 160 MHz bandwidth are calculated respectively according to the equations:

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 9, 2023

From: LIU, CHENCHEN; LIANG, DANDAN; GAN, MING

To: HUAWEI TECHNOLOGIES CO., LTD.

Reel/Frame 063573/0916 →

Priority Claims (1)

CN 202010762599.8 · Jul 31, 2020 · national

Continuity (2)

Continuation PCTCN2021109915 · Jul 30, 2021

Related Publication 20230224203A1 · Jul 13, 2023

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