Method and device for receiving PPDU through broadband in wireless LAN system

A receiving station (STA), comprising:

• a memory;
• a transceiver;
• and
• a processor operatively coupled to the memory and transceiver,
• wherein processor is configured to:
• receive a Physical Protocol Data Unit (PPDU) from a transmitting STA;
• and
• decode the PPDU,
• wherein the PPDU includes an Extreme High Throughput (EHT)-Short Training Field (STF) field,
• wherein the EHT-STF field is generated based on a first STF sequence,
• wherein, for a 320 MHz transmission, the first STF sequence is a sequence in which an M sequence is repeated as shown below:
• {M1−M0−M1−M0M1−M0−M1−M0−M−1M0M−1M0−M−1M0M−1M}*(1+j)/sqrt(2),
• sqrt (2) represents a square root,
• wherein the first STF sequence is obtained based on repeating a second STF sequence four times and multiplying a sequence for an 80 MHz channel having a third lowest frequency and an 80 MHz channel having the highest frequency among the repeated second STF sequences by −1,
• wherein the second STF sequence is {M1−M0−M1−M}*(1+j)/sqrt (2), and
• wherein the M sequence is defined as shown below:
• M
• =
• {
• -
• 1
• ,
• -
• 1
• ,
• -
• 1
• ,
• 1
• ,
• 1
• ,
• 1
• ,
• -
• 1
• ,
• 1
• ,
• 1
• ,
• 1
• ,
• -
• 1
• ,
• 1
• ,
• 1
• ,
• -
• 1
• ,
• 1
• }
• .

A method, comprising:

• generating, by a transmitting station (STA), a Physical Protocol Data Unit (PPDU);
• and
• transmitting, by the transmitting STA, the PPDU to a receiving STA,
• wherein the PPDU includes an Extreme High Throughput (EHT)-Short Training Field (STF) field,
• wherein the EHT-STF field is generated based on a first STF sequence,
• wherein, for a 320 MHz transmission, the first STF sequence is a sequence in which an M sequence is repeated as shown below:
• {M1−M0−M1−M0M1−M0−M1−M0−M−1M0M−1M0−M−1M0M−1M}*(1+j)/sqrt(2),
• sqrt (2) represents a square root,
• wherein the first STF sequence is obtained based on repeating a second STF sequence four times and multiplying a sequence for an 80 MHz channel having a third lowest frequency and an 80 MHz channel having the highest frequency a 160 MHz subchannel with a high among the repeated second STF sequences by −1,
• wherein the second STF sequence is {M1−M0−M1−M}*(1+j)/sqrt (2), and
• wherein the M sequence is defined as shown below:
• M
• =
• {
• -
• 1
• ,
• -
• 1
• ,
• -
• 1
• ,
• 1
• ,
• 1
• ,
• 1
• ,
• -
• 1
• ,
• 1
• ,
• 1
• ,
• 1
• ,
• -
• 1
• ,
• 1
• ,
• 1
• ,
• -
• 1
• ,
• 1
• }
• .