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

1 . A method, comprising:

receiving, by a receiving station (STA), a Physical Protocol Data Unit (PPDU) from a transmitting STA; and

decoding, by the receiving STA, 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),

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

}

.

2 . The method of claim 1 , wherein the first STF sequence is obtained based on a first preamble puncturing pattern and a combination of radio frequencies (RFs) used when transmitting the PPDU, wherein the first preamble puncturing pattern includes all patterns of a band in which an 80 MHz band is punctured in a 320 MHz band or the 160+160 MHz band, wherein the combination of the RFs is a combination of an RF with 80 MHz capability, an RF with 160 MHz capability, or an RF with 320 MHz capability.

3 . The method of claim 1 , wherein the first STF sequence is obtained based on information related to a full bandwidth and a combination of Radio Frequencies (RFs) used for transmitting the PPDU,

wherein the information related to a full bandwidth is information representing that a 320 MHz band or a 160+160 MHz band is allocated without puncturing for transmitting the PPDU,

wherein the combination of the RF is a combination of an RF with 80 MHz capability, an RF with 160 MHz capability, or an RF with 320 MHz capability.

4 . The method of claim 1 , wherein based on a bandwidth of the PPDU being 160+160 MHz,

within the first STF sequence, an STF sequence for a low 160 MHz band is defined as shown below:

{M,1,−M,0,−M,1,−M,0,M,1,−M,0,−M,1,−M}*(1+j)/sqrt(2), and

within the first STF sequence, an STF sequence for a high 160 MHz band is defined as shown below:

{

-

M

,

-

1

,

M

,

0

,

M

,

-

1

,

M

,

0

,

-

M

,

-

1

,

M

,

0

,

M

,

-

1

,

M

}

*

(

1

+

j

)

/

sqrt

⁡

(

2

)

.

5 . The method of claim 1 , wherein the first STF sequence is mapped to frequency tones at intervals of 16 tones from a lowest tone having a tone index of ‘−2032’ to a highest tone having a tone index of ‘+2032’,

wherein the second STF sequence is mapped to frequency tones at intervals of 16 tones from a lowest tone having a tone index of ‘−496’ to a highest tone having a tone index of ‘+496’.

6 . The method of claim 1 , wherein the PPDU includes a legacy field, a control field, and a data field,

wherein the EHT-STF field is included in the control field,

wherein the control field and the data field support 802.11be wireless LAN system.

7 . 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

}

.

8 . 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

}

.

9 . The method of claim 8 , wherein the first STF sequence is obtained based on a first preamble puncturing pattern and a combination of radio frequencies (RFs) used when transmitting the PPDU, wherein the first preamble puncturing pattern includes all patterns of a band in which an 80 MHz band is punctured in a 320 MHz band or a 160+160 MHz band, wherein the combination of the RFs is a combination of an RF with 80 MHz capability, an RF with 160 MHz capability, or an RF with 320 MHz capability.

10 . The method of claim 8 , wherein the first STF sequence is obtained based on information related to a full bandwidth and a combination of a Radio Frequencies (RFs) used for transmitting the PPDU,

wherein the information related to a full bandwidth is information representing that a 320 MHz band or a 160+160 MHz band is allocated without puncturing for transmitting the PPDU,

wherein the combination of the RFs is a combination of an RF with 80 MHz capability, an RF with 160 MHz capability, or an RF with 320 MHz capability.

11 . The method of claim 8 , wherein based on a bandwidth of the PPDU being 160+160 MHz,

within the first STF sequence, an STF sequence for a low 160 MHz band is defined as shown below:

{M,1,−M,0,−M,1,−M,0,M,1,−M,0,−M,1,−M}*(1+j)/sqrt(2), and

within the first STF sequence, an STF sequence for a high 160 MHz band is defined as shown below:

{

-

M

,

-

1

,

M

,

0

,

M

,

-

1

,

M

,

0

,

-

M

,

-

1

,

M

,

0

,

M

,

-

1

,

M

}

*

(

1

+

j

)

/

sqrt

⁡

(

2

)

.

12 . The method of claim 8 , wherein the first STF sequence is mapped to frequency tones at intervals of 16 tones from a lowest tone having a tone index of ‘−2032’ to a highest tone having a tone index of ‘+2032’,

wherein the second STF sequence is mapped to frequency tones at intervals of 16 tones from a lowest tone having a tone index of ‘−496’ to a highest tone having a tone index of ‘+496’.

13 . The method of claim 8 , wherein the PPDU includes a legacy field, a control field, and a data field,

wherein the EHT-STF field is included in the control field,

wherein the control field and the data field support 802.11be wireless LAN system.