Abstract: Proposed are a method and device for receiving a feedback frame in a wireless LAN system. Specifically, a first STA transmits an NDPA frame to a second STA. The first STA transmits an NDP frame to the second STA. The first STA receives, from the second STA, a feedback frame transmitted on the basis of the NDP frame. The feedback frame includes information about a beamforming feedback matrix. The information about the beamforming feedback matrix includes a first bit for the index difference between quantized phi of adjacent subcarriers, and a second bit for the index difference between quantized psi of the adjacent subcarriers. The adjacent subcarriers are two adjacent subcarriers starting with the first subcarrier among all of the subcarriers. The first subcarrier is either the left edge subcarrier or the right edge subcarrier. The quantized phi and psi are information about beamforming angles.

Abstract: A method and an apparatus for transmitting and receiving data in a wireless LAN system are proposed. Specifically, an AP transmits control information to at least one STA. The AP transmits data to at least one STA or receives data from at least one STA, on the basis of the control information. The control information includes resource unit information for transmitting and receiving the data in a broadband. If the RU information is tone plan information for the full bandwidth of the broadband, the RU information includes allocation information that the broadband is composed of 12 guard tones, 4068 tones RU, 5 DC tones, and 11 guard tones. If the RU information is tone plan information to which OFDMA is applied for the broadband, the RU information includes allocation information that the broadband is composed of 12 guard tones, 2020 tones RU, 13 tones RU, 7 DC, 13 tones RU, 2020 tones RU, and 11 guard tones.

Abstract: A method and an apparatus for transmitting a PPDU in a WLAN system are proposed. Specifically, a transmitter generates a PPDU and transmits the PPDU to a receiver. The PPDU includes a legacy field and an EHT field. The legacy field includes a VHT-STF and a HE-STF. The EHT field includes an EHT-STF and a data field. The EHT field is configured on the basis of a CSD value of each transport chain. The CSD value is determined as a candidate CSD value in which the sum of a first absolute value and a second absolute value is the minimum on the basis of a power ratio. The power ratio is a ratio of a received power of the VHT-STF, the HE-STF, or the EHT-STF to a received power of the data field. The first absolute value is an absolute value of a value related to 5 percent of a CDF relative to the power ratio. The second absolute value is an absolute value of a value related to 95 percent of the CDF relative to the power ratio.

Abstract: An example according to the present disclosure relates to a technique for identifying a wireless LAN (WLAN) packet. For example, when a physical protocol data unit (PPDU) includes a legacy signal field, a field contiguous to the legacy signal field may be used to identify a type of the PPDU. A field contiguous to the legacy signal field may include information indicating that the PPDU is an extreme high throughput (EHT) PPDU. The field contiguous to the legacy signal field may include at least one of information related to a frame format, a transmission opportunity, an STA ID, and/or a bandwidth.

Abstract: An example according to the present disclosure relates to a technique for identifying a wireless LAN (WLAN) packet. For example, when a physical protocol data unit (PPDU) includes a legacy signal field, a field contiguous to the legacy signal field may be used to identify a type of the PPDU. A field contiguous to the legacy signal field may include information indicating that the PPDU is an extreme high throughput (EHT) PPDU. The field contiguous to the legacy signal field may include at least one of information related to a frame format, a transmission opportunity, an STA ID, and/or a bandwidth.

Abstract: A method and a device for transmitting a PPDU in a WLAN system are proposed. Specifically, a transmission device generates a PPDU and transmits the PPDU to a reception device through a 320 MHz band. The PPDU includes a legacy preamble and an EHT field, and the legacy preamble includes an L-STF and an L-LTF. The legacy preamble is generated by applying a first phase rotation value or a second phase rotation value. The first phase rotation value is obtained based on a third phase rotation value and a fourth phase rotation value. The third phase rotation value is a phase rotation value obtained by repeating a phase rotation value defined when the PPDU is transmitted in an 80 MHz band four times. The fourth phase rotation value is a phase rotation value defined for each 80 MHz band in the 320 MHz band based on an optimal PAPR of the L-STF.

Abstract: A method of transmitting and receiving signals in a wireless local area network (WLAN) system and a device for the same are provided. More particularly, there are provided a method and a device for the same in which a station operating in an orthogonal frequency division multiplexing (OFDM) mode transmits and receives signals through two aggregated channels.

Abstract: Proposed are a method and an apparatus for transmitting and receiving data to and from a wireless LAN system. Specifically, an AP transmits control information to an STA. The AP transmits data to or receives data from the STA on the basis of the control information. The control information includes RU information for transmitting and receiving data over a broadband network. If the broadband, on the basis of the RU information, is defined as only one full bandwidth, the RU information includes allocation information that the broadband consists of 12 guard tones, 3044-tone RU, 5 DC tones, and 11 guard tones. If the broadband, on the basis of the RU information, includes three 996-tone RUs, the RU information includes allocation information that the broadband consists of 12 guard tones, a first 996-tone RU, 1 null tone, 26-tone RU, 1 null tone, a second 996-tone RU, 1 null tone, 26-tone RU, 1 null tone, a third 996-tone RU, and 11 guard tones.

Abstract: A method and a device for transmitting a PPDU in a WLAN system are proposed. Specifically, a transmission device generates a PPDU and transmits the PPDU to a reception device through a 320 MHz band. The PPDU includes a legacy preamble and an EHT field, and the legacy preamble includes an L-STF and an L-LTF. The legacy preamble is generated by applying a first phase rotation value or a second phase rotation value. The first phase rotation value is obtained based on a third phase rotation value and a fourth phase rotation value. The third phase rotation value is a phase rotation value obtained by repeating a phase rotation value defined when the PPDU is transmitted in an 80 MHz band four times. The fourth phase rotation value is a phase rotation value defined for each 80 MHz band in the 320 MHz band based on an optimal PAPR of the L-STF.

Abstract: A method and a device for transmitting a PPDU in a WLAN system are proposed. Specifically, an AP generates a PPDU and transmits the PPDU to a STA through a broadband. The PPDU includes an EHT-LTF and a data field. The data field includes a pilot tone. The coefficient of the pilot tone is set to a second pilot sequence in which a first pilot sequence is repeated. The first pilot sequence is {1 1 1 ?1 ?1 1 1 1}.

Abstract: A method and a device for transmitting a PPDU in a WLAN system are proposed. Specifically, an AP generates a PPDU and transmits the PPDU to a STA. The PPDU includes an extremely high throughput (EHT)-LTF and a data field. The data field includes a pilot tone. The pilot tone is configured based on resource unit (RU) information about a broadband. When the broadband includes four 996-tone RUs based on the RU information, an index for the pilot tone is set to ±{24, 92, 158, 226, 266, 334, 400, 468, 562, 630, 696, 764, 804, 872, 938, 1006, 1048, 1116, 1182, 1250, 1290, 1358, 1424, 1492, 1586, 1654, 1720, 1788, 1828, 1896, 1962, 2030}.

Abstract: A method and an apparatus for transmitting a PPDU in a WLAN system are proposed. Specifically, a transmitter generates a PPDU and transmits the PPDU to a receiver. The PPDU includes a legacy field and an EHT field. The legacy field includes an L-STF. The EHT field includes a data field. The legacy field is configured on the basis of a CSD value per a transmission chain. The CSD value is determined by a candidate CSD value that is the minimum of the sums of a first absolute value and a second absolute value on the basis of a power ratio. The power ratio is a ratio of received power of the L-STF to received power of the data field. The first absolute value is an absolute value of a value related to 5 percent of a CDF relative to the power ratio. The second absolute value is an absolute value of a value related to 95 percent of the CDF relative to the power ratio.

Abstract: An example according to the present disclosure relates to a technique for identifying a wireless LAN (WLAN) packet. For example, when a physical protocol data unit (PPDU) includes a legacy signal field, a field contiguous to the legacy signal field may be used to identify a type of the PPDU. A field contiguous to the legacy signal field may include information indicating that the PPDU is an extreme high throughput (EHT) PPDU. The field contiguous to the legacy signal field may include at least one of information related to a frame format, a transmission opportunity, an STA ID, and/or a bandwidth.

Abstract: This specification is related to a long training field (LTF) symbol of a WLAN. The LTF symbol may be generated based on a first LTF generation sequence used for an odd-numbered stream and a second LTF generation sequence used for an even-numbered stream. An even-numbered element of the first LTF generation sequence may be set to zero (0), and an odd-numbered element of the second LTF generation sequence may be set to zero (0). A plurality of LTF symbols for first and third streams may be generated by applying a P mapping matrix to the first LTF generation sequence. A plurality of LTF symbols for a second stream may be generated by applying the P matrix to the second LTF generation sequence.

Abstract: Proposed is a method and device for receiving an EHT PPDU on the basis of a tone plan in a wireless LAN system. Specifically, a reception STA receives an EHT PPDU from a transmission STA via a 320 MHz band. The reception STA decodes the EHT PPDU. The EHT PPDU includes a control field and a data field. The control field includes information on a tone plan. The information on the tone plan includes allocation information indicating that a tone plan for the 320 MHz band is configured by four iterations of a tone plan for an 80 MHz band, which is defined in an 802.11ax wireless LAN system. The data field is received via an RU configured based on the allocation information.

Abstract: The present invention relates to a method for performing MU-MIMO beamforming training, the method comprising: receiving a MIMO beamforming setup frame including identification information of a station participating in MU-MIMO beamforming training, in an MU-MIMO beamforming setup subphase; receiving a BRP frame in an MU-MIMO beamforming training subphase; and performing MU-MIMO beamforming training using the BRP frame, if the identification information of the station included in the MIMO beamforming setup frame responds to the STA and a TA field and an RA field of the BRP frame are the same as a MAC address of an initiator that has transmitted the MIMO beamforming setup frame.

Abstract: Proposed are a method and an apparatus for receiving an MU PPDU in a wireless LAN system. Specifically, a receiving STA receives an MU PPDU from a transmitting STA. The receiving STA decodes the MU PPDU. The MU PPDU includes an LSIG field, an RL-SIG field, an HE-SIG field, and an EHT-SIG field. A first reserved bit of the L-SIG field includes information indicating that a first band in which the MU PPDU is transmitted is greater than 160 MHz. A second reserved bit of the HE-SIG field includes information relating to a second band in which the EHT-SIG field is transmitted or the size of the first band. The receiving STA includes an HE STA and an EHT STA.

Abstract: Proposed are a method and device for receiving an EHT PPDU on the basis of a tone plan in a wireless LAN system. Specifically, a reception STA receives the EHT PPDU from a transmission STA through a 320 MHz band. The reception STA decodes the EHT PPDU. The EHT PPDU includes a control field and a data field. The control field includes information about a pilot tone. The information about the pilot tone includes allocation information indicating that a first pilot tone for the 320 MHz band is configured by repeating a second pilot tone for an 80 MHz band defined in an 802.11ax wireless LAN system. The first pilot tone is received in a data field on the basis of the allocation information.

Abstract: Disclosed herein are a method for transmitting and receiving beamforming feedback information in a wireless local access network system and devices supporting the same. Particularly, disclosed herein are a method for transmitting and receiving beamforming feedback information related to feedback subcarrier indices, where the feedback subcarrier indices is determined based on a Ng value of subcarrier groupings and a number NCB of bonded channel.

Abstract: Proposed are a method and device for receiving a feedback frame in a wireless LAN system. Specifically, a first STA transmits an NDPA frame to a second STA. The first STA transmits an NDP frame to the second STA. The first STA receives, from the second STA, a feedback frame transmitted on the basis of the NDP frame. The feedback frame includes information about a beamforming feedback matrix. The information about the beamforming feedback matrix includes a first bit for the index difference between quantized phi of adjacent subcarriers, and a second bit for the index difference between quantized psi of the adjacent subcarriers. The adjacent subcarriers are two adjacent subcarriers starting with the first subcarrier among all of the subcarriers. The first subcarrier is either the left edge subcarrier or the right edge subcarrier. The quantized phi and psi are information about beamforming angles.