Communication method and communication device

Abstract

The invention provides a communication method and device, and the method can be applied to a WLAN system which supports an IEEE 802.11 ax next generation Wi-Fi protocol, such as 802.11 be, Wi-Fi 7 or EHT, and then 802.11 series protocols such as 802.11 be next generation, Wi-Fi 8 and the like, and can also be applied to a UWB-based wireless personal area network system, a sensing system and the like. The method comprises the following steps: a sending end generates a physical layer protocol data unit (PPDU) and sends the PPDU to a receiving end; wherein the PPDU comprises a first field, the first field is used for bearing a first sequence, the first sequence is used for a receiving end to perform channel estimation, the first sequence corresponds to a first bandwidth, and the first bandwidth is greater than 320 MHz. According to the scheme, the channel estimation sequence corresponding to the bandwidth larger than 320 MHz is designed to support signal transmission in a large-bandwidth (such as 640 MHz, 480 MHz and the like) scene.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a communication method and a communication device. Background Art

[0002] With the ultra-high-speed growth of wireless traffic, users have higher and higher demands for communication service quality, such as low latency and ultra-reliability. As a key technology for carrying wireless traffic services, wireless local area network (WLAN) continues to develop and evolve to meet people's increasingly high requirements for wireless transmission.

[0003] Since the 802.11a / g standard, WLAN has gone through the 802.11n standard, 802.11ac standard, 802.11ax standard and 802.11be standard. Among them, 802.11be adopts orthogonal frequency division multiple access (OFDMA) technology to support the transmission of physical layer protocol data units (PPDU) with a maximum bandwidth of 320MHz to achieve ultra-high transmission rates and support ultra-multi-user scenarios. However, more subcarriers under large bandwidth will bring more serious peak to average power ratio (PAPR), causing nonlinear distortion of the signal and reducing system performance. Summary of the invention

[0004] The present application provides a communication method and a communication device, which support communication under large bandwidth by designing a channel estimation sequence corresponding to a large bandwidth (bandwidth greater than 320 MHz, such as 640 MHz bandwidth, 480 MHz bandwidth, etc.).

[0005] In a first aspect, a communication method is provided, which may be executed by a transmitting end or by a component (eg, a chip, a circuit, or a module, etc.) configured in the transmitting end, and is not limited in the present application.

[0006] The method includes: generating a physical layer protocol data unit PPDU, the PPDU includes a first field, the first field is used to carry a first sequence, the first sequence is used for a receiving end to perform channel estimation, the first sequence corresponds to a first bandwidth, and the first bandwidth is greater than 320MHz; sending the PPDU to the receiving end.

[0007] Optionally, the first bandwidth is 640 MHz or 480 MHz, and the first sequence can be understood as a 640 MHz PPDU or a channel estimation sequence in a 640 MHz PPDU.

[0008] Exemplarily, the transmitting end may be an access point (AP) or a non-access point (non-AP) station (STA). The receiving end may be an AP or a STA, which is not limited in this application. For example, a communication scenario may be: the transmitting end is an AP and the receiving end is an STA; a communication scenario may be: the transmitting end is an STA and the receiving end is an AP; a communication scenario may be: the transmitting end is an STA and the receiving end is an STA; a communication scenario may be: the transmitting end is an AP and the receiving end is an AP.

[0009] Based on the above scheme, by designing the first sequence corresponding to a bandwidth greater than 320MHz (i.e., a long training field (LTF) sequence), signal transmission in future large bandwidth scenarios (such as 640MHz, 480MHz, etc.) is supported. The first sequence has a lower PAPR over the entire bandwidth and also has a lower PAPR on RU / MRU. In the scenario of multi-spatial stream transmission, the first sequence also has a lower PAPR on multiple spatial streams, thereby ensuring the transmission performance of the system.

[0010] In combination with the first aspect, in some implementations of the first aspect, the first sequence includes N subsequences, and any subsequence in the N subsequences is obtained according to a base sequence and a parameter corresponding to the subsequence, such as being obtained by multiplying the base sequence by the parameter corresponding to the subsequence. The base sequence includes a first base sequence and a second base sequence, such as the first base sequence is LTF80MHz_4x_left, and the second base sequence is LTF80MHz_4x_right. The parameter corresponding to any subsequence may be ±1.

[0011] Based on the above scheme, the first base sequence and the second base sequence are used as base sequences. By multiplying the base sequence by ±1 to obtain any subsequence of the N subsequences in the first sequence, the first sequence can not only ensure that the entire bandwidth has a low PAPR, but also has a low PAPR on each RU / MRU. In a multi-spatial stream transmission scenario, the first sequence also has a low PAPR in multiple spatial streams, fully ensuring the communication performance of all users.

[0012] In combination with the first aspect, in some implementations of the first aspect, when the first bandwidth is 640 MHz, the parameters [c1, ..., c 16 ] satisfies one or more of the following:

[0013] [c9,c 10 ,c 11 ,c 12]=±[-c8,c7,-c6,c5];

[0014] [c 13 ,c 14 ,c 15 ,c 16 ]=±[-c4,c3,-c2,c1];

[0015] [c1,c2,c3,c4]=±[-c8,c7,-c6,c5];

[0016] [c9,c 10 ,c 11 ,c 12 ]=±[-c 13 ,c 14 ,-c 15 ,c 16 ].

[0017] For example, [c1, c2, c3, c4] correspond to the first 160 MHz bandwidth, [c5, c6, c7, c8] correspond to the second 160 MHz bandwidth, [c9, c 10 ,c 11 ,c 12 ] corresponds to the third 160MHz bandwidth, [c 13 ,c 14 ,c 15 ,c 16 ] corresponds to the fourth 160 MHz bandwidth, by defining at least two parameters c corresponding to the 160 MHz bandwidth i The above-mentioned characteristics of the combined sequence are met, so that the longer LTF sequence has a lower PAPR in the entire bandwidth and also has a lower PAPR in RU / MRU. For multi-spatial stream transmission, the first sequence has a lower PAPR in each spatial stream. At the same time, the parameters [c1,…,c 16 ] satisfies the symmetric splicing condition of the combined sequence, which can relatively reduce the amount of calculation, reduce the difficulty and complexity of calculation, and can obtain the LTF sequence of the above-mentioned 640MHz PPDU faster and more accurately.

[0018] Optionally, at least two parameters c corresponding to the 160MHz bandwidth i The symmetric points are not within any of the above 160M bandwidths. 10 ,c 11 ,c 12 ], and the relationship between [c 13 ,c 14 ,c 15 ,c 16] and [c 13 ,c 14 ,c 15 ,c 16 ] are not limited.

[0019] Based on the above scheme, when the parameters corresponding to the first sequence meet the above symmetric splicing conditions, the PAPR of the 640MHz LTF sequence in the entire bandwidth is low, and the PAPR on the corresponding RU / MRU is also low. In the multi-spatial stream transmission scenario, the PAPR of the first sequence in multiple spatial streams is also low, which can ensure the signal transmission quality and improve the system transmission performance.

[0020] In combination with the first aspect, in some implementations of the first aspect, when the first bandwidth is 640 MHz, parameters corresponding to the N subsequences satisfy any one of the following:

[0021] [c1,…,c 16 ] = ±[1,-1,1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1,1]; or,

[0022] [c1,…,c 16 ] = ±[1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,-1,1]; or,

[0023] [c1,…,c 16 ] = ±[1,1,-1,1,-1,-1,-1,-1,-1,-1,1,-1,1,1,-1]; or,

[0024] [c1,…,c 16 ] = ±[-1,1,1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,1]; or,

[0025] [c1,…,c 16 ] = ±[1,1,-1,1,-1,-1,-1,1,-1,1,-1,1,1,-1,1,1]; or,

[0026] [c1,…,c 16 ] = ±[-1,1,1,1,-1,1,1,-1,-1,-1,-1,-1,1,-1,1,1]; or,

[0027] [c1,…,c 16 ] = ±[1,1,-1,1,-1,-1,-1,1,-1,-1,-1,-1,-1,-1,-1]; or,

[0028] [c1,…,c16 ] = ±[-1,-1,1,-1,-1,1,-1,-1,-1,-1,-1,1,-1,1,1]; or,

[0029] [c1,…,c 16 ] = ±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1,1,-1,1]; or,

[0030] [c1,…,c 16 ] = ±[1,-1,1,1,1,1,-1,-1,-1,-1,1,1,-1,1]; or,

[0031] [c1,…,c 16 ] = ±[1,-1,1,-1,-1,-1,-1,1,1,1,-1,-1,-1,-1]; or,

[0032] [c1,…,c 16 ] = ±[-1,-1,-1,-1,1,1,1,-1,-1,-1,-1,-1,1,-1,1]; or,

[0033] [c1,…,c 16 ] = ±[1,-1,-1,-1,-1,1,1,-1,1,1,1,-1,1,-1,-1]; or,

[0034] [c1,…,c 16 ] = ±[-1,-1,1,-1,1,1,1,-1,1,1,-1,-1,-1,-1,-1,1]; or,

[0035] [c1,…,c 16 ] = ±[1,-1,1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,1,-1]; or,

[0036] [c1,…,c 16 ]=±[-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,1].

[0037] Based on the above scheme, the parameters corresponding to the first sequence provided above [c1,…,c 16 ], the corresponding first sequence can have a low PAPR in the entire bandwidth or each RU / MRU. In addition, in the scenario of multi-spatial stream transmission, the PAPR of the first sequence in multiple spatial streams is also low, which makes the subsequent channel estimation result of the receiving end more accurate and ensures the system transmission performance.

[0038] In combination with the first aspect, in some implementations of the first aspect, when the first bandwidth is 480 MHz, the parameters [c1, ..., c 12 ]Meet any of the following:

[0039] [c1,…,c 12 ] = ±[1,-1,1,1,1,-1,-1,-1,-1,-1,-1,-1]; or,

[0040] [c1,…,c 12 ] = ±[-1,-1,1,-1,-1,-1,-1,1,1,-1,1]; or,

[0041] [c1,…,c 12 ] = ±[1,1,-1,1,-1,-1,-1,-1,-1,-1,-1]; or,

[0042] [c1,…,c 12 ] = ±[-1,1,-1,-1,1,-1,-1,-1,-1,1,1]; or,

[0043] [c1,…,c 12 ] = ±[1,1,-1,1,-1,-1,-1,1,-1,1,-1]; or,

[0044] [c1,…,c 12 ] = ±[-1,1,1,-1,1,-1,-1,-1,1,-1,1,1]; or,

[0045] [c1,…,c 12 ] = ±[1,1,-1,1,-1,-1,-1,1,-1,1,-1]; or,

[0046] [c1,…,c 12 ] = ±[-1,1,-1,1,1,-1,-1,-1,1,-1,1,1]; or,

[0047] [c1,…,c 12 ] = ±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1]; or,

[0048] [c1,…,c 12 ] = ±[1,1,1,-1,-1,-1,-1,1,1,-1,1]; or,

[0049] [c1,…,c 12 ] = ±[1,-1,1,-1,-1,-1,-1,1,1,1,1]; or,

[0050] [c1,…,c 12 ] = ±[1,1,1,1,-1,-1,1,-1,-1,1,-1,1]; or,

[0051] [c1,…,c 12 ] = ±[1,-1,-1,-1,-1,1,-1,1,1,1,1]; or,

[0052] [c1,…,c 12 ] = ±[1,1,1,1,-1,1,1,-1,-1,-1,-1,1]; or,

[0053] [c1,…,c 12 ] = ±[1,-1,1,-1,-1,-1,-1,-1,1,-1,1]; or,

[0054] [c1,…,c 12 ] = ±[1,-1,1,1,-1,-1,-1,-1,-1,-1,1,1]; or,

[0055] [c1,…,c 12 ] = ±[1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,1]; or,

[0056] [c1,…,c 12 ] = ±[1,1,1,-1,-1,-1,-1,-1,-1,-1,1]; or,

[0057] [c1,…,c 12 ] = ±[-1,-1,-1,1,-1,-1,1,-1,1,1,-1]; or,

[0058] [c1,…,c 12 ] = ±[-1,1,1,1,-1,1,-1,-1,-1,-1,-1,-1]; or,

[0059] [c1,…,c 12 ] = ±[-1,-1,-1,1,-1,1,-1,1,1,-1]; or,

[0060] [c1,…,c 12 ] = ±[-1,1,1,1,-1,1,1,-1,1,-1,-1,-1]; or,

[0061] [c1,…,c 12] = ±[-1,-1,-1,1,1,-1,-1,-1,-1,-1,-1]; or,

[0062] [c1,…,c 12 ] = ±[-1,-1,1,-1,-1,1,-1,1,-1,-1,-1]; or,

[0063] [c1,…,c 12 ] = ±[1,-1,-1,-1,-1,1,1,1,1,-1,1]; or,

[0064] [c1,…,c 12 ] = ±[1,-1,1,1,1,1,-1,-1,-1,-1,1]; or,

[0065] [c1,…,c 12 ] = ±[-1,1,-1,-1,1,1,1,-1,-1,-1,-1]; or,

[0066] [c1,…,c 12 ] = ±[-1,-1,-1,-1,1,1,1,-1,-1,-1,1,-1]; or,

[0067] [c1,…,c 12 ] = ±[-1,1,1,-1,1,1,1,-1,1,-1,-1]; or,

[0068] [c1,…,c 12 ] = ±[-1,-1,1,-1,1,1,1,-1,1,1,-1]; or,

[0069] [c1,…,c 12 ] = ±[-1,-1,-1,-1,1,-1,1,-1,1,-1,1,-1]; or,

[0070] [c1,…,c 12 ]=±[-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1].

[0071] Exemplarily, for the 480MHz bandwidth, some MRU patterns and LTF sequences designed for the 640MHz bandwidth can be reused. For example, the RU / MRU of the 640MHz RU / MRU that is less than or equal to 5*996 is considered, and the pilot phase rotation caused by different P matrices is considered. Therefore, the LTF sequence corresponding to the first 480MHz or the last 480MHz can be intercepted from the LTF sequence of the 640MHz PPDU as the LTF sequence of the 480MHz PPDU. Based on the above scheme, a low PAPR sequence suitable for the 480MHz bandwidth can be quickly obtained, which can support large bandwidth signal transmission while improving signal transmission quality.

[0072] In a second aspect, a communication method is provided. The method may be executed by a receiving end or by a component (eg, a chip, a circuit, or a module, etc.) configured in the receiving end, and the present application does not limit the method.

[0073] The method includes: receiving a physical layer protocol data unit PPDU, the PPDU includes a first field, the first field carries a first sequence passing through a wireless channel, the first sequence at the receiving end of the wireless channel corresponds to a first bandwidth, and the first bandwidth is greater than 320MHz; performing channel estimation according to the first sequence passing through the wireless channel and a preset first sequence.

[0074] Exemplarily, the first bandwidth is 640 MHz or 480 MHz.

[0075] Based on the above scheme, by designing the first sequence (i.e., LTF sequence) with a bandwidth greater than 320MHz, signal transmission in future large bandwidth scenarios (such as 640MHz, 480MHz, etc.) is supported. At the same time, the first sequence has not only a low PAPR over the entire bandwidth, but also a low PAPR over RU / MRU. In addition, in the scenario of multi-spatial stream transmission, the PAPR of the first sequence in multiple spatial streams is also low, which facilitates the receiving end to obtain a more accurate channel estimation result based on the first sequence through the wireless channel and the preset first sequence, thereby ensuring the system transmission performance.

[0076] In conjunction with the second aspect, in certain implementations of the second aspect, the preset first sequence includes N subsequences, and any subsequence in the N subsequences is obtained by a base sequence and a parameter corresponding to the subsequence, such as by multiplying the base sequence by the parameter corresponding to the subsequence. The base sequence includes a first base sequence and a second base sequence, such as the first base sequence is LTF80MHz_4x_left, the first base sequence is LTF80MHz_4x_right, and the parameter corresponding to any subsequence may be ±1.

[0077] In combination with the second aspect, in some implementations of the second aspect, when the first bandwidth is 640 MHz, the parameters [c1, ..., c 16 ] satisfies one or more of the following:

[0078] [c9,c 10 ,c 11 ,c 12 ]=±[-c8,c7,-c6,c5];

[0079] [c 13 ,c 14 ,c 15 ,c 16 ]=±[-c4,c3,-c2,c1];

[0080] [c1,c2,c3,c4]=±[-c8,c7,-c6,c5];

[0081] [c9,c 10 ,c 11 ,c 12 ]=±[-c 13 ,c 14 ,-c 15 ,c 16 ].

[0082] In combination with the second aspect, in some implementations of the second aspect, when the first bandwidth is 640 MHz, the parameters [c1, ..., c 16 ] satisfies one or more of the following:

[0083] [c1,…,c 16 ] = ±[1,-1,1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1,1]; or,

[0084] [c1,…,c 16 ] = ±[1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,-1,1]; or,

[0085] [c1,…,c 16 ] = ±[1,1,-1,1,-1,-1,-1,-1,-1,-1,1,-1,1,1,-1]; or,

[0086] [c1,…,c 16 ] = ±[-1,1,1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,1]; or,

[0087] [c1,…,c 16] = ±[1,1,-1,1,-1,-1,-1,1,-1,1,-1,1,1,-1,1,1]; or,

[0088] [c1,…,c 16 ] = ±[-1,1,1,1,-1,1,1,-1,-1,-1,-1,-1,1,-1,1,1]; or,

[0089] [c1,…,c 16 ] = ±[1,1,-1,1,-1,-1,-1,1,-1,-1,-1,-1,-1,-1,-1]; or,

[0090] [c1,…,c 16 ] = ±[-1,-1,1,-1,-1,1,-1,-1,-1,-1,-1,1,-1,1,1]; or,

[0091] [c1,…,c 16 ] = ±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1,1,-1,1]; or,

[0092] [c1,…,c 16 ] = ±[1,-1,1,1,1,1,-1,-1,-1,-1,1,1,-1,1]; or,

[0093] [c1,…,c 16 ] = ±[1,-1,1,-1,-1,-1,-1,1,1,1,-1,-1,-1,-1]; or,

[0094] [c1,…,c 16 ] = ±[-1,-1,-1,-1,1,1,1,-1,-1,-1,-1,-1,1,-1,1]; or,

[0095] [c1,…,c 16 ] = ±[1,-1,-1,-1,-1,1,1,-1,1,1,1,-1,1,-1,-1]; or,

[0096] [c1,…,c 16 ] = ±[-1,-1,1,-1,1,1,1,-1,1,1,-1,-1,-1,-1,-1,1]; or,

[0097] [c1,…,c 16 ] = ±[1,-1,1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,1,-1]; or,

[0098] [c1,…,c 16 ]=±[-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,1].

[0099] In combination with the second aspect, in some implementations of the second aspect, when the first bandwidth is 480 MHz, the parameters [c1,…,c 12 ]Meet any of the following:

[0100] [c1,…,c 12 ] = ±[1,-1,1,1,1,-1,-1,-1,-1,-1,-1,-1]; or,

[0101] [c1,…,c 12 ] = ±[-1,-1,1,-1,-1,-1,-1,1,1,-1,1]; or,

[0102] [c1,…,c 12 ] = ±[1,1,-1,1,-1,-1,-1,-1,-1,-1,-1]; or,

[0103] [c1,…,c 12 ] = ±[-1,1,-1,-1,1,-1,-1,-1,1,-1,1]; or,

[0104] [c1,…,c 12 ] = ±[1,1,-1,1,-1,-1,-1,1,-1,1,-1]; or,

[0105] [c1,…,c 12 ] = ±[-1,1,1,-1,1,-1,-1,-1,1,-1,1,1]; or,

[0106] [c1,…,c 12 ] = ±[1,1,-1,1,-1,-1,-1,1,-1,1,-1]; or,

[0107] [c1,…,c 12 ] = ±[-1,1,-1,1,1,-1,-1,-1,1,-1,1,1]; or,

[0108] [c1,…,c 12 ] = ±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1]; or,

[0109] [c1,…,c 12] = ±[1,1,1,-1,-1,-1,-1,1,1,-1,1]; or,

[0110] [c1,…,c 12 ] = ±[1,-1,1,-1,-1,-1,-1,1,1,1,1]; or,

[0111] [c1,…,c 12 ] = ±[1,1,1,1,-1,-1,1,-1,-1,1,-1,1]; or,

[0112] [c1,…,c 12 ] = ±[1,-1,-1,-1,-1,1,-1,1,1,1,1]; or,

[0113] [c1,…,c 12 ] = ±[1,1,1,1,-1,1,1,-1,-1,-1,-1,1]; or,

[0114] [c1,…,c 12 ] = ±[1,-1,1,-1,-1,-1,-1,-1,1,-1,1]; or,

[0115] [c1,…,c 12 ] = ±[1,-1,1,1,-1,-1,-1,-1,-1,-1,1,1]; or,

[0116] [c1,…,c 12 ] = ±[1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,1]; or,

[0117] [c1,…,c 12 ] = ±[1,1,1,-1,-1,-1,-1,-1,-1,-1,1]; or,

[0118] [c1,…,c 12 ] = ±[-1,-1,-1,1,-1,-1,1,-1,1,1,-1]; or,

[0119] [c1,…,c 12 ] = ±[-1,1,1,1,-1,1,-1,-1,-1,-1,-1,-1]; or,

[0120] [c1,…,c 12 ] = ±[-1,-1,-1,1,-1,1,-1,1,1,-1]; or,

[0121] [c1,…,c12 ] = ±[-1,1,1,1,-1,1,1,-1,1,-1,-1,-1]; or,

[0122] [c1,…,c 12 ] = ±[-1,-1,-1,1,1,-1,-1,-1,-1,-1,-1]; or,

[0123] [c1,…,c 12 ] = ±[-1,-1,1,-1,-1,1,-1,1,-1,-1,-1]; or,

[0124] [c1,…,c 12 ] = ±[1,-1,-1,-1,-1,1,1,1,1,-1,1]; or,

[0125] [c1,…,c 12 ] = ±[1,-1,1,1,1,1,-1,-1,-1,-1,1]; or,

[0126] [c1,…,c 12 ] = ±[-1,1,-1,-1,1,1,1,-1,-1,-1,-1]; or,

[0127] [c1,…,c 12 ] = ±[-1,-1,-1,-1,1,1,1,-1,-1,-1,1,-1]; or,

[0128] [c1,…,c 12 ] = ±[-1,1,1,-1,1,1,1,-1,1,-1,-1]; or,

[0129] [c1,…,c 12 ] = ±[-1,-1,1,-1,1,1,1,-1,1,1,-1]; or,

[0130] [c1,…,c 12 ] = ±[-1,-1,-1,-1,1,-1,1,-1,1,-1,1,-1]; or,

[0131] [c1,…,c 12 ]=±[-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1].

[0132] The beneficial effects of the above-mentioned second aspect and some implementation methods of the second aspect can be referred to the relevant description of the first aspect, which will not be repeated here.

[0133] In a third aspect, a communication device is provided. The device may be a transmitting end or a component in the transmitting end (eg, a chip, a circuit or a module, etc.), which is not limited in the present application.

[0134] The device includes: a processing unit, used for generating a physical layer protocol data unit PPDU, the PPDU includes a first field, the first field is used to carry a first sequence, the first sequence is used for a receiving end to perform channel estimation, the first sequence corresponds to a first bandwidth, and the first bandwidth is greater than 320MHz; a transceiver unit, used for sending the PPDU to the receiving end.

[0135] The transceiver unit can perform the reception and transmission processing in the aforementioned first aspect, and the processing unit can perform other processing except reception and transmission in the aforementioned first aspect.

[0136] The technical effects of the device shown in the third aspect above can refer to the technical effects in the first aspect and its possible designs.

[0137] In a fourth aspect, a communication device is provided. The device may be a receiving end or a component in the receiving end (eg, a chip, a circuit or a module, etc.), which is not limited in the present application.

[0138] The device includes: a transceiver unit, used for receiving a physical layer protocol data unit PPDU, the PPDU includes a first field, the first field carries a first sequence passing through a wireless channel, the first sequence passing through the wireless channel corresponds to a first bandwidth, and the first bandwidth is greater than 320MHz; a processing unit, used for performing channel estimation according to the first sequence passing through the wireless channel and a preset first sequence.

[0139] The transceiver unit can perform the reception and transmission processing in the aforementioned second aspect, and the processing unit can perform other processing except reception and transmission in the aforementioned second aspect.

[0140] The technical effects of the device shown in the fourth aspect above can refer to the technical effects in the second aspect and its possible designs.

[0141] In a fifth aspect, a communication device is provided, comprising a processor, configured to call and run a computer program stored in a memory, and control a transceiver to send and receive signals, so that the communication device performs a method as in any aspect of the first aspect or the second aspect, or any possible implementation of these aspects. Optionally, the communication device may further include the memory, configured to store the computer program, and the communication device may further include the transceiver.

[0142] In a sixth aspect, a communication device is provided, comprising a processor, the processor being used to process data and / or information so that the method in any aspect of the first aspect or the second aspect, or any possible implementation of these aspects, is executed. Optionally, the communication device may also include a communication interface, the communication interface being used to receive data and / or information, and transmit the received data and / or information to the processor. Optionally, the communication interface is also used to output the data and / or information processed by the processor.

[0143] In a seventh aspect, a chip is provided, comprising a processor, the processor being used to run a program or an instruction, so that the chip executes the method in any aspect of the first aspect or the second aspect, or any possible implementation of these aspects. Optionally, the chip may also include a memory, the memory being used to store the program or the instruction. Optionally, the chip may also include the transceiver.

[0144] In an eighth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to implement a method as in any aspect of the first aspect or the second aspect, or any possible implementation of these aspects.

[0145] In a ninth aspect, a computer program product is provided, the computer program product comprising a computer program code, the computer program code being used to implement a method as in any aspect of the first aspect or the second aspect, or any possible implementation of any aspect of these aspects.

[0146] In a tenth aspect, a communication system is provided, comprising the communication device in the third and fourth aspects mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0147] Figure 1 It is a schematic diagram of an application scenario applicable to the embodiment of the present application;

[0148] Figure 2 This is a schematic diagram of a corresponding MRU pattern in an 80 MHz bandwidth provided in an embodiment of the present application;

[0149] Figure 3 It is a structural diagram of a multi-stream LTF sequence provided in an embodiment of the present application;

[0150] Figure 4 is a flow chart of a communication method 700 provided in an embodiment of the present application;

[0151] Figure 5 (a) to (i) are schematic diagrams of MRU patterns provided in an embodiment of the present application when the bandwidth is 640 MHz;

[0152] Figure 6 (a) to (h) are schematic diagrams of MRU patterns provided in an embodiment of the present application when the bandwidth is 480 MHz;

[0153] Figure 7 is a schematic structural diagram of a communication device 1000 provided in an embodiment of the present application;

[0154] Figure 8 is a schematic structural diagram of a communication device 2000 provided in an embodiment of the present application;

[0155] Fig. 9 It is a schematic structural diagram of a chip system 3000 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0156] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0157] The technical solution provided in the embodiments of the present application can be applicable to wireless local area network (WLAN) scenarios, for example, supporting the Institute of Electrical and Electronics Engineers (IEEE) 802.11 related standards, such as 802.11a / b / g standards, 802.11n standards, 802.11ac standards, 802.11ax standards, 802.11be standards, 802.11be next generation standards, 802.11ad standards, 802.11ay standards, UWB standards 802.15 series standards, and 802.11bf series standards.

[0158] Although the embodiments of the present application are mainly described by deploying a WLAN network, especially a network using the IEEE 802.11 system standard, it is easy for those skilled in the art to understand that the various aspects involved in the embodiments of the present application can be extended to other networks using various standards or protocols, such as BLUETOOTH networks, high-performance wireless local area networks (HIPERLAN), wireless wide area networks (WWAN), wireless personal area networks (WPAN) or other networks known now or developed later. Therefore, regardless of the coverage range and wireless access protocol used, the various aspects provided in the embodiments of the present application can be applied to any suitable wireless network.

[0159] The technical solutions of the embodiments of the present application can also be applied to various communication systems, such as: WLAN communication system, wireless fidelity (Wi-Fi) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) system or new radio (NR), sixth generation (6G) system, Internet of Things (IoT) network or vehicle to x (V2X), etc.

[0160] The above-mentioned communication system applicable to the present application is only an example for illustration, and the communication system applicable to the present application is not limited to this. A unified description is given here and no further elaboration is given below.

[0161] Figure 1 Schematic diagram of application scenarios applicable to the embodiments of the present application. Figure 1 As shown, the communication method provided by the present application is applicable to communication between stations (STA), wherein the station can be an AP-type station or a non-access point-type station (none access point station, non-AP STA), referred to as AP and non-AP stations, respectively. Specifically, the scheme of the present application is applicable to communication between an AP and one or more non-AP stations (for example, communication between AP1 and non-APSTA1, non-AP STA2), and is also applicable to communication between APs (for example, communication between AP1 and AP2), and communication between non-AP STAs and non-AP STAs (for example, communication between non-AP STA2 and non-AP STA3).

[0162] For example, an access point can be a node for a terminal (e.g., a mobile phone) to enter a wired (or wireless) network. It is mainly deployed in homes, buildings, and parks, with a typical coverage radius of tens to hundreds of meters. Of course, it can also be deployed outdoors. An access point is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect various wireless network clients together and then connect the wireless network to Ethernet.

[0163] Specifically, the access point can be a terminal or network device with a WiFi chip, and the network device can be a server, a router, a switch, a bridge, a computer, a mobile phone, a relay station, a vehicle-mounted device, a wearable device, a network device in a 5G network, a network device in a 6G network, or a network device in a public land mobile network (PLMN), etc., which is not limited in the embodiments of the present application. The access point can be a device that supports the Wi-Fi standard. For example, the access point can also support one or more standards of the IEEE 802.11 series such as 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11ad, 802.11ay, etc.

[0164] A non-AP site may be a wireless communication chip, a wireless sensor or a wireless communication terminal, etc., and may also be referred to as a user, user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. A non-AP site may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, an Internet of Things device, a wearable device, a terminal device in a 5G network, a terminal device in a 6G network or a terminal device in a PLMN, etc., and the embodiments of the present application are not limited to this. A non-AP site may be a device that supports the WLAN format. For example, the non-AP station may support one or more standards of the IEEE 802.11 series, such as 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ax, 802.11be, 802.11ad, and 802.11ay.

[0165] Exemplarily, non-AP sites can be mobile phones, tablet computers, set-top boxes, smart TVs, smart wearable devices, vehicle-mounted communication devices, computers, Internet of Things (IoT) nodes, sensors, smart homes such as smart cameras, smart remote controls, smart water and electricity meters, and sensors in smart cities.

[0166] The above-mentioned AP or non-AP site may include a transmitter, a receiver, a memory, a processor, etc., wherein the transmitter and the receiver are respectively used for sending and receiving packet structures, the memory is used to store signaling information and store preset values ​​agreed in advance, etc., and the processor is used to parse signaling information, process related data, etc.

[0167] In order to facilitate understanding of the technical solutions of the embodiments of the present application, some terms or concepts that may be involved in the embodiments of the present application are first briefly described.

[0168] (1) Resource unit (RU):

[0169] After the OFDMA technology was introduced in the 802.11ax standard, a bandwidth can be divided into multiple RUs. The types of RUs are: 26-toneRU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU, 996-tone RU and 2×996-tone RU. Each RU can be allocated to one user, so as to achieve a finer division of spectrum resources and more flexible frequency resource scheduling.

[0170] (2) Multiple resource unit (MRU):

[0171] The 802.11be standard defines a new frequency resource unit, namely MRU, which allows multiple RUs to be allocated to the same user, achieving more flexible frequency resource allocation. The small-size MRU in the standard includes two types: 52+26-tone MRU and 106+26-tone MRU. The large-size MRU types in the standard include: 484+242-tone MRU, 996+484-tone MRU, 996+484+242-tone MRU, 2×996+484-tone MRU, 3×996-tone MRU and 3×996+484-tone MRU.

[0172] For different bandwidths, such as 20MHz, 40MHz, 80MHz, 160MHz and 320MHz, the standard has currently defined the corresponding MRU patterns and LTF sequences. Figure 2The figure is a schematic diagram of the corresponding MRU patterns in the 80MHz bandwidth. In the 802.11be standard, the 484+242-tone MRU patterns in the 80MHz bandwidth include 484+242-tone MRU1, 484+242-tone MRU2, 484+242-tone MRU3 and 484+242-tone MRU4, a total of 4 MRU patterns.

[0173] (3) Possible bandwidth size in the future:

[0174] In future WLAN standards, if a larger bandwidth appears, it is more likely to exist in the 6GHz frequency band. Because compared with the 2.4GHz and 5GHz frequency bands, 6GHz belongs to a new spectrum and has a larger bandwidth. There are four frequency bands in the 6GHz frequency band: UNII-5, 6, 7, and 8. However, many countries only have a 500MHz bandwidth in UNII-5. It can be considered that the large bandwidth that may appear in future standards includes but is not limited to 480MHz and 640MHz. Because the current standard maximum bandwidth is 320MHz, the new bandwidth often appears in the form of doubling (e.g., 2×320MHz=640MHz) or halving (e.g., 320MHz+160MHz=480MHz), so the possible future bandwidth forms defined in this application include but are not limited to 480MHz and 640MHz. For the convenience of description, the following embodiments mainly use 480MHz and 640MHz bandwidths as examples for illustration, which does not constitute a limitation on the technical solution of this application.

[0175] (4) Peak-to-average power ratio / PAPR:

[0176] The amplitude of wireless signals is constantly changing in the time domain, so the transmission power of wireless signals is not constant. PAPR refers to the ratio of the peak power of a signal to the average power of the signal over a period of time. Since OFDM symbols are composed of multiple independently modulated subcarrier signals, when the phases of each subcarrier are the same or similar, the superimposed signal will be modulated by the same initial phase signal, thereby generating a larger instantaneous power peak, which further leads to a higher PAPR. Since the dynamic range of general power amplifiers is limited, MIMO-OFDM signals with large PAPR can easily enter the nonlinear region of the power amplifier, resulting in nonlinear distortion of the signal, causing obvious spectrum spread interference and in-band signal distortion, resulting in a serious degradation of the performance of the entire system.

[0177] (5) Long training field (LTF) sequence:

[0178] The LTF sequence can be used for channel estimation. Different bandwidths correspond to different LTF sequences.

[0179] There are currently three types of subcarriers: data subcarriers, pilot subcarriers, and unused subcarriers. Data subcarriers are used to transmit actual data; pilot subcarriers are used to provide phase information and parameter tracking; unused subcarriers are neither data subcarriers nor pilot subcarriers, and include central direct current (DC) subcarriers, guard bands, and null subcarriers.

[0180] In a multi-stream scenario, in order to accurately estimate the spatial stream channel, the WIFI standard proposes to keep the LTF sequences on each spatial stream orthogonal by multiplying the LTF sequence on the data subcarrier using the P matrix.

[0181] Taking the number of spatial streams as 2 as an example, the corresponding P matrix is:

[0182]

[0183] Taking the number of spatial streams as 4 as an example, the corresponding P matrix is:

[0184]

[0185] Taking the number of spatial streams as 6 as an example, the corresponding P matrix is:

[0186]

[0187] Figure 3 This is a schematic diagram of the construction of a multi-stream LTF sequence. Figure 3 As shown in the figure, the marked time is the cyclic shift delay (CSD) corresponding to each spatial stream. For the case where the number of spatial streams is less than 4, the corresponding LTF sequence can be found in Figure 3 The kth subcarrier carries the kth element LTF of the LTF sequence. k , and the LTF of the nth OFDM symbol corresponding to the mth spatial stream is multiplied by the element of the mth row and nth column in the P matrix, so for the channel H k After that, the frequency domain signal Y received by the non-AP STA k It can be expressed as: k =H k P 4*4 LTF k Since the P matrix is ​​an orthogonal matrix (for example, I is the identity matrix, * is the conjugate transpose of the matrix), so the channel on the kth subcarrier is In this way, the corresponding multiple input multiple output (MIMO) channel on the k-th subcarrier can be estimated.

[0188] It should be understood that one RU / MRU includes data subcarriers and pilot subcarriers. The above-mentioned LTF construction method is only for data subcarriers. For pilot subcarriers, the corresponding LTF construction method is similar to the LTF construction method of data subcarriers, but the difference between the two is that the LTF construction method of pilot subcarriers uses R matrix instead of P matrix, where the relationship between R matrix and P matrix is: R(m,n)=P(1,n), that is, each row of R matrix is ​​equal to the first row of P matrix. Therefore, the elements of LTF sequence on data subcarriers and the elements of LTF sequence on pilot subcarriers may be multiplied by different values, resulting in changes in the PAPR value of the designed LTF sequence. For the specific contents of P matrix and R matrix, please refer to the 802.11ac standard, which will not be repeated here.

[0189] Based on this, the present application provides a communication method and apparatus, and designs an LTF sequence under a larger bandwidth (such as 640MHz, 480MHz, etc.), which has a lower PAPR not only in the entire bandwidth, but also in RU / MRU. In addition, for the scenario of multi-spatial stream transmission, the PAPR of the LTF sequence in multiple spatial streams is also low, thereby ensuring the system transmission performance.

[0190] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0191] 1) In this application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0192] 2) In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c. Where a, b and c can be single or multiple, respectively.

[0193] 3) In the present application, "first", "second" and various numerical references are used to distinguish for the convenience of description and are not used to limit the scope of the embodiments of the present application. For example, they are used to distinguish different messages, etc., rather than to describe a specific order or sequence. It should be understood that the objects described in this way can be interchanged where appropriate so as to be able to describe solutions other than the embodiments of the present application.

[0194] 4) In this application, the terms "comprises" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0195] 5) In this application, "used for indication" may include being used for direct indication and being used for indirect indication. When describing that a certain indication information is used for indicating A, it may include that the indication information directly indicates A or indirectly indicates A, but it does not mean that the indication information must carry A.

[0196] 6) In this application, "communication" may also be described as "data transmission", "information transmission", "data processing", etc. "Transmission" includes "sending" and "receiving".

[0197] The technical solution provided by the present application will be described in detail below with reference to the accompanying drawings. The embodiments of the present application can be applied to a variety of different scenarios, including Figure 1 The scenario shown is, but not limited to, that scenario.

[0198] It should be understood that the embodiments shown below do not particularly limit the specific structure of the execution subject of the method provided by the embodiments of the present application. As long as it is possible to communicate according to the method provided by the embodiments of the present application by running a program that records the code of the method provided by the embodiments of the present application, for example, the execution subject of the method provided by the embodiments of the present application may be a receiving device or a sending device, or a functional module in the receiving device or the sending device that can call and execute the program.

[0199] Without loss of generality, the following describes in detail the communication method provided in the embodiment of the present application by taking the interaction between the transmitter and the receiver as an example. The transmitter involved in the embodiment of the present application may be an access point (AP) or a non-access point (non-AP) station (STA); the receiver may be an AP or a STA, and the present application does not limit this. For example, a communication scenario may be: the transmitter is an AP and the receiver is an STA; a communication scenario may be: the transmitter is an STA and the receiver is an AP; a communication scenario may be: the transmitter is an STA and the receiver is an STA; a communication scenario may be: the transmitter is an AP and the receiver is an AP. Transmitter Receiver Transmitter Receiver For ease of understanding and description, the following embodiments are described by taking the example that the transmitter may be an AP and the receiver may be a STA.

[0200] Figure 4 is a flow chart of a communication method 400 provided in an embodiment of the present application, such as Figure 4 As shown, the following steps are included.

[0201] S410, the transmitting end generates a PPDU.

[0202] The PPDU includes a first field, and the first field is used to carry a first sequence, such as a UHR-LTF sequence. The first sequence is used for channel estimation at the receiving end, and the first sequence corresponds to a first bandwidth, and the first bandwidth is greater than 320 MHz.

[0203] Optionally, the first bandwidth is 640 MHz or 480 MHz, and the first sequence can be understood as a channel estimation sequence in a 640 MHz PPDU or a 480 MHz PPDU.

[0204] Optionally, the first sequence includes N subsequences, and any subsequence in the N subsequences is obtained according to the base sequence and the parameters corresponding to the subsequence, such as being obtained by multiplying the base sequence by the parameters corresponding to the subsequence. The base sequence includes a first base sequence and a second base sequence, such as the first base sequence is LTF80MHz_4x_left and the second base sequence is LTF80MHz_4x_right. The parameter corresponding to any subsequence can be ±1.

[0205] For example, the first base sequence may be a sequence corresponding to the left 40 MHz of 80 MHz (LTF80MHz_4x_left as shown below), and the second base sequence may be a sequence corresponding to the right 40 MHz of 80 MHz (LTF80MHz_4x_right as shown below). Then the first sequence corresponding to 640 MHz includes 16 subsequences, that is, N=16, and the first sequence corresponding to 480 MHz includes 12 subsequences, that is, N=12.

[0206] In an embodiment of the present application, LTF80MHz_4x_left and LTF80MHz_4x_right are used as base sequences, and any subsequence of the N subsequences in the first sequence is obtained by multiplying the base sequence by ±1. That is to say, by processing the base sequence, a longer LTF sequence, namely the first sequence, can be obtained to support signal transmission in future large bandwidth scenarios (such as 640MHz, 480MHz, etc.). Since at least two subsequences in the first sequence meet the symmetrical splicing condition, the first sequence not only has a lower PAPR over the entire bandwidth, but also has a lower PAPR on RU / MRU. In addition, for the scenario of multi-spatial stream transmission, the first sequence also has a lower PAPR in multiple spatial streams, thereby ensuring the system transmission performance. Among them, the symmetrical splicing condition of the combined sequence can be found in the specific description below.

[0207] Hereinafter, the related contents of the LTF sequence of the 640 MHz PPDU and the LTF sequence of the 480 MHz PPDU will be described.

[0208] (I) LTF sequence of 640MHz PPDU

[0209] 1.640MHz RU / MRU

[0210] For 640MHz bandwidth, in addition to being compatible with the MRU modes defined in 320MHz bandwidth (such as 484+242-tone MRU, 996+484-tone MRU, 2×996+484-tone MRU, 3×996-tone MRU and 3×996+484-tone MRU, etc.), some MRU modes will be introduced, including the following:

[0211] For example, an 8×996-tone MRU can be considered as a combination of four 2×996-tone RUs; or,

[0212] The 8×996-tone MRU can be viewed as the combination of two 4×996-tone RUs; or,

[0213] The 8×996-tone MRU can be considered as a 4×996-tone RU, two 2×996-tone RUs combined, and so on.

[0214] It should be understood that the data subcarriers of the 8×996-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 8×996-tone MRU, and the pilot subcarriers of the 8×996-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 8×996-tone MRU. For example, the 8×996-tone MRU is obtained by combining one 4×996-tone RU and two 2×996-tone RUs, then the data subcarriers of the 8×996-tone MRU are composed of a combination of data subcarriers of the one 4×996-tone RU and two 2×996-tone RUs, and the pilot subcarriers of the 8×996-tone MRU are composed of a combination of pilot subcarriers of the one 4×996-tone RU and two 2×996-tone RUs.

[0215] For example, a 7×996-tone MRU can be considered as a combination of a 4×996-tone RU, a 2×996-tone RU and a 996-tone RU; or,

[0216] The 7×996-tone MRU can be viewed as the combination of three 2×996-tone RUs and one 996-tone RU; or,

[0217] 7×996-tone MRU can be considered as seven 996-tone RUs combined; or,

[0218] The 7×996-tone MRU can be considered as the combination of two 2×996-tone RUs and three 996-tone RUs.

[0219] It should be understood that the data subcarriers of the 7×996-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 7×996-tone MRU, and the pilot subcarriers of the 7×996-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 7×996-tone MRU. For example, the 7×996-tone MRU is obtained by combining a 4×996-tone RU, a 2×996-tone RU and a 996-tone RU, then the data subcarriers of the 7×996-tone MRU are composed of a combination of data subcarriers of the 4×996-tone RU, a 2×996-tone RU and a 996-tone RU, and the pilot subcarriers of the 7×996-tone MRU are composed of a combination of pilot subcarriers of the 4×996-tone RU, a 2×996-tone RU and a 996-tone RU.

[0220] For ease of understanding, the following Figure 5 (a) in FIG. 1 shows a schematic diagram of 8×996-tone MRU and 7×996-tone MRU when the bandwidth is 640 MHz. Figure 5 As can be seen from (a), the 8×996-tone MRU pattern includes 8×996-tone MRU1, and the 7×996-tone MRU pattern includes 7×996-tone MRU 1, ..., 7×996-tone MRU 8, a total of 8 MRU patterns. It can be seen that the 8×996-tone RUs include the entire bandwidth, the 7×996-tone MRU occupies part of the 640MHz bandwidth, and the remaining 996 subcarriers can be used for data transmission by one or more other users.

[0221] For example, a 6×996-tone MRU can be considered as a combination of a 4×996-tone RU and a 2×996-tone RU; or,

[0222] The 6×996-tone MRU can be viewed as the combination of three 2×996-tone RUs; or,

[0223] 6×996-tone MRU can be considered as the combination of six 996-tone RUs; or,

[0224] The 6×996-tone MRU can be considered as the combination of two 2×996-tone RUs and two 996-tone RUs.

[0225] It should be understood that the data subcarriers of the 6×996-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 6×996-tone MRU, and the pilot subcarriers of the 6×996-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 6×996-tone MRU. For example, the 6×996-tone MRU is obtained by combining two 2×996-tone RUs and two 996-tone RUs, then the data subcarriers of the 6×996-tone MRU are composed of a combination of data subcarriers of the two 2×996-tone RUs and two 996-tone RUs, and the pilot subcarriers of the 6×996-tone MRU are composed of a combination of pilot subcarriers of the two 2×996-tone RUs and two 996-tone RUs.

[0226] For example, a 5×996-tone MRU can be considered as a combination of a 4×996-tone RU and a 996-tone RU; or,

[0227] The 5×996-tone MRU can be considered as the combination of two 2×996-tone RUs and one 996-tone RU; or,

[0228] 5×996-tone MRU can be regarded as the combination of five 996-tone RUs.

[0229] It should be understood that the data subcarriers of the 5×996-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 5×996-tone MRU, and the pilot subcarriers of the 5×996-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 5×996-tone MRU. For example, a 5×996-tone MRU is obtained by combining two 2×996-tone RUs and one 996-tone RU, and the data subcarriers of the 5×996-tone MRU are composed of a combination of data subcarriers of the two 2×996-tone RUs and one 996-tone RU. The pilot subcarriers of the 5×996-tone MRU are composed of a combination of pilot subcarriers of the two 2×996-tone RUs and one 996-tone RU.

[0230] For ease of understanding, the following Figure 5 (b) in FIG. 1 shows a schematic diagram of a 6×996-tone MRU and a 5×996-tone MRU when the bandwidth is 640 MHz. Figure 5As can be seen from (b) in FIG. 1 , the 6×996-tone MRU pattern includes 4 MRU patterns, namely 6×996-tone MRU 1, 6×996-tone MRU 2, 6×996-tone MRU 3 and 6×996-tone MRU 4, and the 5×996-tone MRU pattern includes 12 MRU patterns, namely 5×996-tone MRU 1, …, 5×996-tone MRU 12.

[0231] For example, a 4×996-tone MRU can be considered as two 2×996-tone RUs combined; or,

[0232] A 4×996-tone MRU can be viewed as a 2×996-tone RU, the combination of two 996-tone RUs, and so on.

[0233] It should be understood that the data subcarriers of the 4×996-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 4×996-tone MRU, and the pilot subcarriers of the 4×996-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 4×996-tone MRU. For example, the 4×996-tone MRU is obtained by combining a 2×996-tone RU and two 996-tone RUs, then the data subcarriers of the 4×996-tone MRU are composed of a combination of data subcarriers of the one 2×996-tone RU and two 996-tone RUs, and the pilot subcarriers of the 4×996-tone MRU are composed of a combination of pilot subcarriers of the one 2×996-tone RU and two 996-tone RUs.

[0234] For example, a 3×996-tone MRU can be considered as a combination of a 2×996-tone RU and a 996-tone RU.

[0235] It should be understood that the data subcarriers of the 3×996-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 3×996-tone MRU, and the pilot subcarriers of the 3×996-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 3×996-tone MRU. For example, the 3×996-tone MRU is obtained by combining a 2×996-tone RU and a 996-tone RU, then the data subcarriers of the 3×996-tone MRU are composed of a combination of data subcarriers of the 2×996-tone RU and a 996-tone RU, and the pilot subcarriers of the 3×996-tone MRU are composed of a combination of pilot subcarriers of the 2×996-tone RU and a 996-tone RU.

[0236] For ease of understanding, the following Figure 5 (c) in FIG. 1 shows a schematic diagram of a 4×996-tone MRU and a 3×996-tone MRU when the bandwidth is 640 MHz. Figure 5 As can be seen from (c) in the figure, the 4×996-tone MRU pattern includes 4×996-tone MRU 1 and 4×996-tone MRU 2, a total of 2 MRU patterns, and the 3×996-tone MRU pattern includes 3×996-tone MRU 1, ..., 3×996-tone MRU 8, a total of 8 MRU patterns.

[0237] For example, a 2×996-tone MRU can be considered as two 996-tone RUs combined.

[0238] It should be understood that the data subcarriers of the 2×996-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 2×996-tone MRU, and the pilot subcarriers of the 2×996-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 2×996-tone MRU. For example, if the 2×996-tone MRU is obtained by merging two 996-tone RUs, then the data subcarriers of the 2×996-tone MRU are composed of a combination of data subcarriers of the two 996-tone RUs, and the pilot subcarriers of the 2×996-tone MRU are composed of a combination of pilot subcarriers of the two 996-tone RUs.

[0239] For ease of understanding, the following Figure 5 (d) in FIG. 1 is a schematic diagram of a 2×996-tone MRU with a bandwidth of 640 MHz. Figure 5As can be seen from (d) in FIG. 1 , the 2×996-tone MRU pattern includes 2×996-tone MRU 1, …, 2×996-tone MRU 4, a total of 4 MRU patterns.

[0240] For example, a 7×996+484-tone MRU can be considered as a combination of a 4×996-tone RU, a 2×996-tone RU, a 996-tone RU and a 484-tone RU; or,

[0241] The 7×996+484-tone MRU can be considered as the combination of three 2×996-tone RUs, one 996-tone RU, and one 484-tone RU; or,

[0242] 7×996+484-tone MRU can be considered as seven 996-tone RUs combined with one 484-tone RU; or,

[0243] The 7×996+484-tone MRU can be considered as the combination of two 2×996-tone RUs, three 996-tone RUs and one 484-tone RU.

[0244] It should be understood that the data subcarriers of the 7×996+484-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 7×996+484-tone MRU, and the pilot subcarriers of the 7×996+484-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 7×996+484-tone MRU. For example, a 7×996+484-tone MRU is obtained by combining a 4×996-tone RU, a 2×996-tone RU, a 996-tone RU and a 484-tone RU. Then, the data subcarriers of the 7×996+484-tone MRU are composed of a combination of the data subcarriers of the 4×996-tone RU, the 2×996-tone RU, the 996-tone RU and the 484-tone RU, and the pilot subcarriers of the 7×996+484-tone MRU are composed of a combination of the pilot subcarriers of the 4×996-tone RU, the 2×996-tone RU, the 996-tone RU and the 484-tone RU.

[0245] For ease of understanding, the following Figure 5(e) in FIG. 1 is a schematic diagram of a 7×996+484-tone MRU with a bandwidth of 640 MHz. Figure 5 As can be seen from (e) in FIG. 7 , the 7×996-tone MRU pattern includes 7×996+484-tone MRU 1, …, 7×996+484-tone MRU 16, a total of 16 MRU patterns.

[0246] For example, a 5×996+484-tone MRU can be considered as a combination of a 4×996-tone RU, a 996-tone RU, and a 484-tone RU; or,

[0247] The 5×996+484-tone MRU can be considered as the combination of two 2×996-tone RUs, one 996-tone RU and one 484-tone RU; or,

[0248] 5×996+484-tone MRU can be regarded as the combination of five 996-tone RUs and one 484-tone RU.

[0249] It should be understood that the data subcarriers of the 5×996+484-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 5×996+484-tone MRU, and the pilot subcarriers of the 5×996+484-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 5×996+484-tone MRU. For example, the 5×996+484-tone MRU is obtained by combining two 2×996-tone RUs, one 996-tone RU and one 484-tone RU, then the data subcarriers of the 5×996+484-tone MRU are composed of a combination of data subcarriers of the two 2×996-tone RUs, one 996-tone RU and one 484-tone RU, and the pilot subcarriers of the 5×996+484-tone MRU are composed of a combination of pilot subcarriers of the two 2×996-tone RUs, one 996-tone RU and one 484-tone RU.

[0250] For ease of understanding, the following Figure 5 (f) in FIG. 1 shows a schematic diagram of a 5×996+484-tone MRU with a bandwidth of 640 MHz. Figure 5As can be seen from (f) in FIG. 5 , the 5×996+484-tone MRU patterns include 5×996+484-tone MRU 1, …, 5×996+484-tone MRU 24, a total of 24 MRU patterns.

[0251] For example, a 3×996+484-tone MRU can be considered as a combination of a 2×996-tone RU, a 996-tone RU, and a 484-tone RU.

[0252] It should be understood that the data subcarriers of the 3×996+484-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 3×996+484-tone MRU, and the pilot subcarriers of the 3×996+484-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 3×996+484-tone MRU. For example, the 3×996+484-tone MRU is obtained by combining a 2×996-tone RU, a 996-tone RU and a 484-tone RU, then the data subcarriers of the 3×996+484-tone MRU are composed of a combination of data subcarriers of the 2×996-tone RU, a 996-tone RU and a 484-tone RU, and the pilot subcarriers of the 3×996+484-tone MRU are composed of a combination of pilot subcarriers of the 2×996-tone RU, a 996-tone RU and a 484-tone RU.

[0253] For ease of understanding, the following Figure 5 (g) in FIG. 1 shows a schematic diagram of a 4×996-tone MRU and a 3×996+484-tone MRU when the bandwidth is 640 MHz. Figure 5 As can be seen from (g) in FIG. 1 , the 4×996-tone MRU includes the 4×996-tone MRU 1 pattern, and the 3×996+484-tone MRU pattern includes 3×996+484-tone MRU 1, …, 3×996+484-tone MRU 16, for a total of 16 MRU patterns.

[0254] For example, a 2×996+484-tone MRU can be considered as a combination of two 996-tone RUs and one 484-tone RU.

[0255] It should be understood that the data subcarriers of the 2×996+484-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 2×996+484-tone MRU, and the pilot subcarriers of the 2×996+484-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 996+484-tone MRU. For example, the 2×996+484-tone MRU is obtained by combining two 996-tone RUs and one 484-tone RU, then the data subcarriers of the 2×996+484-tone MRU are composed of a combination of data subcarriers of the two 996-tone RUs and one 484-tone RU, and the pilot subcarriers of the 2×996+484-tone MRU are composed of a combination of pilot subcarriers of the two 996-tone RUs and one 484-tone RU.

[0256] For ease of understanding, the following Figure 5 (h) in FIG. 1 shows a schematic diagram of a 2×996+484-tone MRU with a bandwidth of 640 MHz. Figure 5 As can be seen from (h) in FIG. 1 , the 2×996+484-tone MRU patterns include 2×996+484-tone MRU 1, …, 2×996+484-tone MRU 24, a total of 24 MRU patterns.

[0257] For example, a 996+484-tone MRU can be considered as a combination of a 996-tone RU and a 484-tone RU.

[0258] It should be understood that the data subcarriers of the 996+484-tone MRU are composed of a combination of data subcarriers of multiple RUs constituting the 996+484-tone MRU, and the pilot subcarriers of the 996+484-tone MRU are composed of pilot subcarriers of multiple RUs constituting the 996+484-tone MRU. For example, the 996+484-tone MRU is obtained by combining a 996-tone RU and a 484-tone RU, then the data subcarriers of the 996+484-tone MRU are composed of a combination of data subcarriers of the 996-tone RU and a 484-tone RU, and the pilot subcarriers of the 996+484-tone MRU are composed of a combination of pilot subcarriers of the 996-tone RU and a 484-tone RU.

[0259] For ease of understanding, the following Figure 5 (i) in FIG. 1 is a schematic diagram of a 996+484-tone MRU when the bandwidth is 640 MHz. Figure 5 As can be seen from (i) in FIG. 1 , the 996+484-tone MRU pattern includes 996+484-tone MRU1, …, 996+484-tone MRU 16, a total of 16 MRU patterns.

[0260] It should be understood that the above detailed description of the MRU pattern of 640 MHz does not limit how to obtain the above MRU pattern in this embodiment. The above merging method is only an example and does not constitute any limitation on the protection scope of this application.

[0261] LTF sequence for 2.640MHz PPDU

[0262] The following uses LTF80MHz_4x_left and LTF80MHz_4x_right as base sequences to construct a 640MHz LTF sequence for the above RU / MRU, so that the designed LTF sequence has a low PAPR not only on the entire 640MHz bandwidth, but also on the RU / MRU of 640MHz. In addition, for the scenario of multi-spatial stream transmission, the LTF sequence has a low PAPR on multiple spatial streams, thereby ensuring user transmission performance.

[0263] LTF80MHz_4x_left=[+1,-1,-1,-1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,-1,-1,+1,+1,-1,-1,+1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,-1,-1,-1,-1,-1,-1,-1,+1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,-1,+1,-1,-1,+1,-1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,+1,-1,-1,+1,+1,-1,-1,-1,-1,+1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,-1,+1,-1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,+1,+1,-1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,-1,+1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1,+1,-1,-1,+1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,+1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,-1,-1,-1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1]；,

[0264] LTF80MHz_4x_right=[-1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,-1,-1,+1,+1,-1,-1,+1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,-1,-1,-1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,-1,+1,+1,-1,-1,+1,+1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1,-1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1,+1,+1,+1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,-1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,+1,+1,-1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,+1,-1,-1,-1,-1,+1,+1,-1,+1,-1,+1,-1,+1,-1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,-1,-1,-1,-1,+1,-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,-1,+1,+1,-1,-1,+1,+1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,+1,+1,-1,+1,-1,+1,+1,-1,-1,-1,-1,-1,+1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,+1,+1,+1,-1]。,

[0265] The LTF sequence of the 640MHz PPDU is as follows:

[0266] LTF 4084,4084 ={c1*LTF80MHz_4x_left,05,c2*LTF80MHz_4x_right,0 23 ,c3*LTF80MHz_4x_left,05,c4*LTF80MHz_4x_right,0 23 ,c5*LTF80MHz_4x_left,05,c6*LTF80MHz_4x_right,0 23 ,c7*LTF80MHz_4x_left,05,c8*LTF80MHz_4x_right,0 23 ,c9*LTF80MHz_4x_left,05,c 10 *LTF80MHz_4x_right,0 23 ,c 11 *LTF80MHz_4x_left,05,c 12 *LTF80MHz_4x_right,0 23 ,c13 *LTF80MHz_4x_left,05,c 14 *LTF80MHz_4x_right,0 23 ,c 15 *LTF80MHz_4x_left,05,c 16 *LTF80MHz_4x_right. Among them, c i =1 or -1, i = 1, 2, 3, ..., 16. Among them, the parameters [c1, ..., c 16 ] can be any one of the following (1) to (16):

[0267] (1)[c1,…,c 16 ] = ±[1,-1,1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1];

[0268] (2)[c1,…,c 16 ] = ±[1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,-1,1];

[0269] (3)[c1,…,c 16 ] = ±[1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,1,-1];

[0270] (4)[c1,…,c 16 ] = ±[-1,1,1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,-1,1];

[0271] (5)[c1,…,c 16 ] = ±[1,1,-1,1,-1,-1,-1,1,-1,1,-1,1,1,-1,1,1,-1];

[0272] (6)[c1,…,c 16 ] = ±[-1,1,1,1,-1,1,1,-1,1,-1,-1,-1,-1,1,-1,1,1];

[0273] (7)[c1,…,c 16 ] = ±[1,1,-1,1,-1,-1,-1,1,-1,-1,-1,-1,-1,-1,-1,-1];

[0274] (8)[c1,…,c 16 ] = ±[-1,-1,1,-1,-1,1,-1,1,-1,-1,-1,-1,1,-1,1,1];

[0275] (9)[c1,…,c 16 ] = ±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1,1,-1,1];

[0276] (10)[c1,…,c 16 ] = ±[1,-1,1,1,1,1,1,-1,-1,-1,-1,1,1,1,-1,1];

[0277] (11)[c1,…,c 16 ] = ±[1,-1,1,-1,-1,-1,-1,1,1,1,-1,-1,-1,-1,-1];

[0278] (12)[c1,…,c 16 ] = ±[-1,-1,-1,-1,1,1,1,-1,-1,-1,-1,-1,-1,1,-1,1];

[0279] (13)[c1,…,c 16 ] = ±[1,-1,-1,-1,-1,1,1,-1,1,1,1,-1,1,-1,-1,-1];

[0280] (14)[c1,…,c 16 ] = ±[-1,-1,1,-1,1,1,1,-1,1,1,-1,-1,-1,-1,-1,-1,1];

[0281] (15)[c1,…,c 16 ] = ±[1,-1,1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,1,-1,1,-1];

[0282] (16)[c1,…,c 16 ]=±[-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,1].

[0283] In summary, by designing LTF sequences corresponding to bandwidths greater than 320MHz to support signal transmission in future large bandwidth scenarios (e.g., 640MHz), the LTF sequences have low PAPR not only in the entire bandwidth, but also in RU / MRU. For scenarios with multiple spatial streams, the PAPR of the LTF sequences is low in multiple spatial streams, thereby ensuring system transmission performance. In addition, considering each element c i The value of can be 1 or -1. For the LTF sequence of 640MHz PPDU, the parameters [c1,…,c 16The value of the element in ] can be 2 16 Considering the various RU / MRU styles and multi-spatial stream scenarios provided above, a lot of calculations and simulations are needed to determine the above parameters [c1,…,c 16 ] values. In contrast, the present application provides a design method to make the parameters [c1,…,c 16 ] The elements in ] meet the symmetrical splicing conditions of the combined sequence, which can overcome the above difficulties, reduce large calculation simulations, reduce the difficulty and complexity of calculations, and can determine the LTF sequence of the above-mentioned 640MHz PPDU more quickly and accurately.

[0284] Next, for the parameters [c1, c2, c3, …, c 16 ] is used to illustrate the design method.

[0285] Exemplarily, for a real number frequency domain sequence X(k), its corresponding time domain signal x(n) satisfies:

[0286]

[0287] According to the above formula (1), the real part of the corresponding time domain signal x(n) is even symmetrical (i.e., real(x(n))=real(x(-n))), and the imaginary part is odd symmetrical (i.e., image(x(n))=-image(x(-n))). When the frequency domain sequence X(k) is even symmetrical (i.e., X(k)=X(-k)), its time domain signal only contains the real part, and the real part signal is the same as the real part of the time domain signal corresponding to the half-edge sequence of X(k) (i.e., X(k), k>0, or X(k), k<0); when the frequency domain sequence X(k) is odd symmetrical (i.e., X(k)=-X(-k)), its time domain signal only contains the imaginary part, and the imaginary part signal is the same as the imaginary part of the time domain signal corresponding to the half-edge sequence of X(k) (i.e., X(k), k>0, or X(k), k<0). Therefore, when an odd symmetric sequence is superimposed with an even symmetric sequence, the time domain signal corresponding to the combined sequence is similar to the time domain signals corresponding to the two half-length sequences. Therefore, although the combined sequence is longer, its PAPR is approximately equal to the PAPR of the half-length half-length sequence, so the combined sequence has a lower PAPR. For example, if the even symmetric sequence is [a2, a1, a1, a2] and the odd symmetric sequence is [-b2, -b1, b1, b2], then the combined sequence can be [-b2, a2, -b1, a1, a1, b1, a2, b2] or [a2, -b2, a1, -b1, b1, a1, b2, a2].

[0288] According to the above principles, in the design parameters [c1, c2, c3, …, c 16], each symmetrical sequence within the 160M bandwidth can correspond to the parameter c i The symmetric splicing condition of the above combined sequence is satisfied. That is, in the 640MHz bandwidth, assuming that [c1, c2, c3, c4] corresponds to the first 160M sub-bandwidth, [c5, c6, c7, c8] corresponds to the second 160M sub-bandwidth, [c9, c 10 ,c 11 ,c 12 ] corresponds to the third 160M sub-bandwidth, [c 13 ,c 14 ,c 15 ,c 16 ] corresponds to the fourth 160M sub-bandwidth, then the parameters c corresponding to at least two 160M sub-bandwidths that are in symmetrical positions and whose symmetrical points are not within any of the above 160M sub-bandwidths are i The symmetric splicing conditions of the above-mentioned merged sequence are met, that is, one or more of the following are met:

[0289] [c9,c 10 ,c 11 ,c 12 ]=±[-c8,c7,-c6,c5] (2)

[0290] [c 13 ,c 14 ,c 15 ,c 16 ]=±[-c4,c3,-c2,c1] (3)

[0291] [c1,c2,c3,c4]=±[-c8,c7,-c6,c5] (4)

[0292] [c9,c 10 ,c 11 ,c 12 ]=±[-c 16 ,c 15 ,-c 14 ,c 13 ] (5)

[0293] That is, the above parameters (1) to (16) satisfy one or more of the above formulas (2) to (5).

[0294] In a first implementation, the above parameters (1) and (2) satisfy formula (2) to formula (5) at the same time. Based on the parameters (1) and (2) and the above Figure 5The RU / MRU shown in the figure can obtain the PAPR results of 640MHz RU / MRU under different pilot phase rotation angles (such as 0 degree, 180 degree, 60 degree and 120 degree). 0 degree can indicate that the relative phase rotation angle between the pilot subcarrier and the data subcarrier corresponding to the LTF sequence is 0 degree, that is, the ratio of a certain element of the R matrix to the corresponding element in the P matrix is ​​1; 180 degrees can indicate that the relative phase rotation angle between the pilot subcarrier and the data subcarrier corresponding to the LTF sequence is 180 degrees, that is, the ratio of a certain element of the R matrix to the corresponding element in the P matrix is ​​1. The ratio of the corresponding elements in the matrix is ​​-1; 60 degrees can indicate that the relative phase rotation angle between the pilot subcarrier and the data subcarrier corresponding to the LTF sequence is 60 degrees, that is, the ratio of a certain element of the R matrix to the corresponding element in the P matrix is ​​w^±(6n+1); 120 degrees can indicate that the relative phase rotation angle between the pilot subcarrier and the data subcarrier corresponding to the LTF sequence is 120 degrees, that is, the ratio of a certain element of the R matrix to the corresponding element in the P matrix is ​​w^±(6n+2), n is an arbitrary integer, w=exp(j*pi / 3).

[0295] That is to say, when designing the LTF sequence, the pilot subcarriers corresponding to the LTF sequence can be phase rotated according to the values ​​of the elements contained in the matrix R (i.e., the pilot phase rotation coefficients), so that the PAPR of the RU / MRU corresponding to the LTF is lower. Among them, the PAPR results of the RU / MRU under different pilot phase rotation angles are Figure 5 The RU / MRU styles shown correspond one to one, as shown in Table 1 below:

[0296] Table 1

[0297]

[0298]

[0299]

[0300] In the second implementation, the above parameters (3) and (4) also satisfy the above formulas (2) to (5). Based on the parameters (3) and (4) and the above Figure 5 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the RU / MRU of 640MHz at different pilot phase rotation angles (such as 0 degree, 180 degree, 60 degree and 120 degree), where the PAPR results of the RU / MRU at different phase rotation angles are Figure 5 The RU / MRU styles shown correspond one to one, as shown in Table 2 below:

[0301] Table 2

[0302]

[0303]

[0304]

[0305]

[0306] In the third implementation, the above parameters (5) and (6) satisfy the above formula (3) and formula (4) at the same time. Based on the parameters (5) and (6) and the above Figure 5 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the RU / MRU of 640MHz at different pilot phase rotation angles (such as 0 degree, 180 degree, 60 degree and 120 degree), where the PAPR results of the RU / MRU at different phase rotation angles are Figure 5 The RU / MRU styles shown correspond one to one, as shown in Table 3 below:

[0307] Table 3

[0308]

[0309]

[0310]

[0311]

[0312] In the fourth implementation, the above parameters (7) and (8) only satisfy the above formula (4). Based on the parameters (7) and (8) and the above formula Figure 5 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the RU / MRU of 640MHz at different pilot phase rotation angles (such as 0 degree, 180 degree, 60 degree and 120 degree), where the PAPR results of the RU / MRU at different phase rotation angles are Figure 5 The RU / MRU styles shown correspond one to one, as shown in Table 4 below:

[0313] Table 4

[0314]

[0315]

[0316]

[0317]

[0318] In the fifth implementation, the above parameters (9) and (10) only satisfy the above formula (4). Based on the parameters (9) and (10) and the above formula Figure 5The RU / MRU shown in FIG. 1 can obtain the PAPR results of the RU / MRU of 640MHz at different pilot phase rotation angles (such as 0 degree, 180 degree, 60 degree and 120 degree), where the PAPR results of the RU / MRU at different phase rotation angles are Figure 5 The RU / MRU styles shown correspond one to one, as shown in Table 5 below:

[0319] Table 5

[0320]

[0321]

[0322]

[0323]

[0324] In the sixth implementation, the above parameters (11) and (12) only satisfy the above formula (3). Based on the parameters (11) and (12) and the above formula Figure 5 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the RU / MRU of 640MHz at different pilot phase rotation angles (such as 0 degree, 180 degree, 60 degree and 120 degree), where the PAPR results of the RU / MRU at different phase rotation angles are Figure 5 The RU / MRU styles shown correspond one to one, as shown in Table 6 below:

[0325] Table 6

[0326]

[0327]

[0328]

[0329]

[0330] In the seventh implementation, the above parameters (13) and (14) only satisfy the above formula (3). Based on the parameters (13) and (14) and the above formula Figure 5 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the RU / MRU of 640MHz at different pilot phase rotation angles (such as 0 degree, 180 degree, 60 degree and 120 degree), where the PAPR results of the RU / MRU at different phase rotation angles are Figure 5 The RU / MRU styles shown correspond one to one, as shown in Table 7 below:

[0331] Table 7

[0332]

[0333]

[0334]

[0335]

[0336] In the eighth implementation, the above parameters (15) and (16) only satisfy the above formula (4). Based on the parameters (15) and (16) and the above formula Figure 5 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the RU / MRU of 640MHz at different pilot phase rotation angles (such as 0 degree, 180 degree, 60 degree and 120 degree), where the PAPR results of the RU / MRU at different phase rotation angles are Figure 5 The RU / MRU styles shown correspond one to one, as shown in Table 8 below:

[0337] Table 8

[0338]

[0339]

[0340]

[0341]

[0342] The above is mainly explained by taking 640MHz PPDU as an example. It should be understood that the RU / MRU pattern and LTF sequence corresponding to the above 640MHz are only examples given for ease of understanding and do not constitute a limitation on the technical solution of this application. This application also proposes a design scheme for MRU and LTF sequences for 480MHz PPDU. The following is a specific description of the RU / MRU pattern and LTF sequence under 480MHz PPDU.

[0343] (ii) LTF sequence of 480MHz PPDU.

[0344] 1.480MHz RU / MRU

[0345] For the 480MHz bandwidth, the RU / MRU style and LTF sequence corresponding to the above-mentioned 640MHz PPDU can be reused. For example, considering the RU / MRU less than or equal to 5*996 in the RU / MRU of the above-mentioned 640MHz PPDU, and considering the pilot phase rotation brought by different P matrices, the LTF sequence corresponding to the first 480MHz or the last 480MHz can be intercepted from the LTF sequence of the 640MHz PPDU as the LTF sequence of the 480MHz PPDU.

[0346] For example, a 6×996-tone RU can be considered as a combination of a 4×996-tone RU and a 2×996-tone RU; or,

[0347] The 6×996-tone RU can be considered as the combination of three 2×996-tone RUs; or,

[0348] 6×996-tone RU can be considered as the combination of six 996-tone RUs; or,

[0349] The 6×996-tone RU can be considered as the combination of two 2×996-tone RUs and two 996-tone RUs.

[0350] For example, a 5×996+484-tone MRU can be considered as a combination of a 4×996-tone RU, a 996-tone RU, and a 484-tone RU; or,

[0351] The 5×996+484-tone MRU can be considered as the combination of two 2×996-tone RUs, one 996-tone RU and one 484-tone RU; or,

[0352] 5×996+484-tone MRU can be regarded as the combination of five 996-tone RUs and one 484-tone RU.

[0353] like Figure 6 As shown in (a) in the figure, it is a schematic diagram of 6×996-tone MRU and 5×996+484-tone MRU when the bandwidth is 480 MHz. The 6×996-tone MRU includes 6×996-tone MRU 1. The 5×996+484-tone MRU style includes 5×996+484-tone MRU 1, …, 5×996+484-tone MRU 12.

[0354] For example, a 5×996-tone MRU can be considered as a combination of a 4×996-tone RU and a 996-tone RU; or,

[0355] The 5×996-tone MRU can be considered as the combination of two 2×996-tone RUs and one 996-tone RU; or,

[0356] 5×996-tone MRU can be regarded as the combination of five 996-tone RUs.

[0357] like Figure 6 As shown in (b) in FIG. 1 , it is a schematic diagram of a 5×996-tone MRU when the bandwidth is 480 MHz. The 5×996-tone MRU patterns include 5×996-tone MRU 1, …, 5×996-tone MRU 6.

[0358] For example, a 4×996-tone MRU can be considered as two 2×996-tone RUs combined; or,

[0359] A 4×996-tone MRU can be viewed as a 2×996-tone RU, the combination of two 996-tone RUs, and so on.

[0360] like Figure 6 As shown in (c) in FIG. 8 , it is a schematic diagram of a 4×996-tone MRU with a bandwidth of 480 MHz. The 4×996-tone MRU patterns include 4×996-tone MRU 1 and 4×996-tone MRU 2.

[0361] For example, a 3×996-tone MRU can be considered as a combination of a 2×996-tone RU and a 996-tone RU.

[0362] like Figure 6 As shown in (d) in FIG. 1 , it is a schematic diagram of a 3×996-tone MRU when the bandwidth is 480 MHz. The 3×996-tone MRU pattern includes 3×996-tone MRU 1, …, 3×996-tone MRU 7.

[0363] For example, a 2×996-tone MRU can be considered as two 996-tone RUs combined.

[0364] like Figure 6 As shown in (e) in FIG. 1 , it is a schematic diagram of a 2×996-tone MRU with a bandwidth of 480 MHz. The 2×996-tone MRU patterns include 2×996-tone MRU 1, …, 2×996-tone MRU 3.

[0365] For example, a 3×996+484-tone MRU can be considered as a combination of a 2×996-tone RU, a 996-tone RU, and a 484-tone RU.

[0366] like Figure 6 As shown in (f) in FIG. 8 , it is a schematic diagram of a 3×996+484-tone MRU when the bandwidth is 480 MHz. The 3×996+484-tone MRU patterns include 3×996+484-tone MRU 1, …, 3×996+484-tone MRU 16.

[0367] For example, a 2×996+484-tone MRU can be considered as a combination of two 996-tone RUs and one 484-tone RU.

[0368] like Figure 6 As shown in (g) in FIG. 8 , it is a schematic diagram of a 2×996+484-tone MRU when the bandwidth is 480 MHz. The 2×996+484-tone MRU patterns include 2×996+484-tone MRU 1, …, 2×996+484-tone MRU 6.

[0369] For example, a 996+484-tone MRU can be considered as a combination of a 996-tone RU and a 484-tone RU.

[0370] like Figure 6 As shown in (h) in FIG. 8 , it is a schematic diagram of a 996+484-tone MRU when the bandwidth is 480 MHz. The 996+484-tone MRU pattern includes 996+484-tone MRU 1, …, 996+484-tone MRU 12.

[0371] It should be understood that the above detailed description of the MRU pattern in the case of 480MHz PPDU, this embodiment does not limit how to obtain the above MRU pattern, the above-provided merging method is only an example, and does not constitute any limitation on the protection scope of this application.

[0372] LTF sequence for 2.480MHz PPDU

[0373] Exemplarily, a 480 MHz LTF sequence satisfies:

[0374] UHRLTF 3060,3060 ={c1*LTF80MHz_4x_left,05,c2*LTF80MHz_4x_right,0 23 ,c3*LTF80MHz_4x_left,05,

[0375] c4*LTF80MHz_4x_right,0 23,c5*LTF80MHz_4x_left,05,c6*LTF80MHz_4x_right,0 23 ,c7*LTF80MHz_4x_left,05,c8*LTF80MHz_4x_right,0 23 ,c9*LTF80MHz_4x_left,c10*LTF80MHz_4x_right,0 23 ,c11*LTF80MHz_4x_left,05,c12*LTF80MHz_4x_right. Among them, c i =1 or -1, i=1,2,3,…,12.

[0376] Among them, the parameters [c1,…,c 12 ] can be any one of the following (1) to (32):

[0377] (1)[c1,…,c 12 ] = ±[1,-1,1,1,1,-1,-1,-1,-1,-1,-1,-1];

[0378] (2)[c1,…,c 12 ] = ±[-1,-1,1,-1,-1,-1,-1,1,1,-1,1];

[0379] (3)[c1,…,c 12 ] = ±[1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,-1];

[0380] (4)[c1,…,c 12 ] = ±[-1,1,-1,-1,1,-1,-1,-1,-1,1,-1,1];

[0381] (5)[c1,…,c 12 ] = ±[1,1,-1,1,-1,-1,-1,1,-1,1,-1];

[0382] (6)[c1,…,c 12 ] = ±[-1,1,1,-1,1,-1,-1,-1,-1,1,-1,1];

[0383] (7)[c1,…,c 12 ] = ±[1,1,-1,1,-1,-1,-1,1,-1,1,-1,-1];

[0384] (8)[c1,…,c 12]=±[-1,1,-1,1,1,-1,-1,-1,1,-1,1,1];

[0385] (9)[c1,…,c 12 ]=±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1];

[0386] (10)[c1,…,c 12 ]=±[1,1,1,-1,-1,-1,-1,1,1,1,-1,1];

[0387] (11)[c1,…,c 12 ]=±[1,-1,1,-1,-1,1,-1,-1,1,1,1,1];

[0388] (12)[c1,…,c 12 ]=±[1,1,1,1,-1,-1,1,-1,-1,1,-1,1];

[0389] (13)[c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,1,-1,1,1,1,1];

[0390] (14)[c1,…,c 12 ]=±[1,1,1,1,-1,1,1,-1,-1,-1,-1,1];

[0391] (15)[c1,…,c 12 ]=±[1,-1,1,-1,-1,-1,-1,-1,1,1,-1,1];

[0392] (16)[c1,…,c 12 ]=±[1,-1,1,1,-1,-1,-1,-1,-1,1,-1,1];

[0393] (17)[c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,-1,-1,-1,1,1,1];

[0394] (18)[c1,…,c 12 ]=±[1,1,1,-1,-1,-1,1,-1,-1,-1,-1,1];

[0395] (19)[c1,…,c 12 ]=±[-1,-1,-1,1,-1,-1,1,-1,1,1,1,-1];

[0396] (20)[c1,…,c 12 ]=±[-1,1,1,1,-1,1,-1,-1,1,-1,-1,-1];

[0397] (21)[c1,…,c 12 ]=±[-1,-1,-1,1,-1,1,1,-1,1,1,1,-1];

[0398] (22)[c1,…,c 12 ]=±[-1,1,1,1,-1,1,1,-1,1,-1,-1,-1];

[0399] (23)[c1,…,c 12 ]=±[-1,-1,-1,1,1,-1,1,-1,-1,1,-1,-1];

[0400] (24)[c1,…,c 12 ]=±[-1,-1,1,-1,-1,1,-1,1,1,-1,-1,-1];

[0401] (25)[c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,1,1,1,1,-1,1];

[0402] (26)[c1,…,c 12 ]=±[1,-1,1,1,1,1,1,-1,-1,-1,-1,1];

[0403] (27)[c1,…,c 12 ]=±[-1,1,-1,-1,1,1,1,1,-1,-1,-1,-1];

[0404] (28)[c1,…,c 12 ]=±[-1,-1,-1,-1,1,1,1,1,-1,-1,1,-1];

[0405] (29)[c1,…,c 12 ]=±[-1,1,1,-1,1,1,1,1,-1,1,-1,-1];

[0406] (30)[c1,…,c 12 ]=±[-1,-1,1,-1,1,1,1,1,-1,1,1,-1];

[0407] (31)[c1,…,c 12 ]=±[-1,-1,-1,-1,1,1,-1,1,-1,1,1,-1];

[0408] (32)[c1,…,c 12 ]=±[-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1].

[0409] That is, the above parameters [c1,…,c 12 ](1) to (32) can be regarded as the parameters [c1,…,c 16 ]Parameters corresponding to the LTF sequence of the first 480MHz or last 480MHz PPDU in (1) to (16).

[0410] In summary, by designing an LTF sequence corresponding to a bandwidth greater than 320MHz to support signal transmission in future large bandwidth scenarios (e.g., 480MHz), the LTF sequence has a lower PAPR not only in the entire bandwidth, but also in RU / MRU. In the scenario of multi-spatial stream transmission, the first sequence also has a lower PAPR in multiple spatial streams, thereby ensuring system transmission performance. In addition, considering each element c i The value of can be 1 or -1. For the LTF sequence of 480MHzPPDU, the parameters [c1,…,c 12 The value of the element in ] can be 2 12 Considering the various RU / MRU styles and multi-spatial stream scenarios provided above, a lot of calculations and simulations are needed to determine the above parameters [c1,…,c 12 In comparison, the technical solution of the present application can overcome the above difficulties, reduce large calculation simulations, reduce the difficulty and complexity of calculations, and can determine the LTF sequence of the above-provided 480MHz PPDU more quickly and accurately.

[0411] In the first implementation, the above parameters (1) and (2) are based on the LTF sequence corresponding to the above Table 1, and the LTF sequence corresponding to the first 480MHz is intercepted as the LTF sequence of the 480MHz PPDU. Based on the parameter (1) or (2), and the above Figure 6The RU / MRU shown in the figure can obtain the PAPR results of 480MHZ RU / MRU under different pilot phase rotation angles (such as 0 degree, 180 degree, 60 degree and 120 degree). 0 degree can indicate that the relative phase rotation angle between the pilot subcarrier and the data subcarrier corresponding to the LTF sequence is 0 degree, that is, the ratio of a certain element of the R matrix to the corresponding element in the P matrix is ​​1; 180 degrees can indicate that the relative phase rotation angle between the pilot subcarrier and the data subcarrier corresponding to the LTF sequence is 180 degrees, that is, the ratio of a certain element of the R matrix to the corresponding element in the P matrix is ​​1. The ratio of the corresponding elements in the matrix is ​​-1; 60 degrees can indicate that the relative phase rotation angle between the pilot subcarrier and the data subcarrier corresponding to the LTF sequence is 60 degrees, that is, the ratio of a certain element of the R matrix to the corresponding element in the P matrix is ​​w^±(6n+1); 120 degrees can indicate that the relative phase rotation angle between the pilot subcarrier and the data subcarrier corresponding to the LTF sequence is 120 degrees, that is, the ratio of a certain element of the R matrix to the corresponding element in the P matrix is ​​w^±(6n+2), n is an arbitrary integer, w=exp(j*pi / 3). Among them, the PAPR results of RU / MRU under different pilot phase rotation angles are the same as Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 9 below:

[0412] Table 9

[0413]

[0414]

[0415]

[0416] In the second implementation, the above parameters (3) and (4) are based on the LTF sequence corresponding to the above Table 2, and the LTF sequence corresponding to the first 480MHz is intercepted as the LTF sequence of the 480MHz PPDU. Based on the parameter (3) or (4), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 10 below:

[0417] Table 10

[0418]

[0419]

[0420]

[0421] In the third implementation, the above parameters (5) and (6) are based on the LTF sequence corresponding to the above Table 3, and the LTF sequence corresponding to the first 480MHz is intercepted as the LTF sequence of the 480MHz PPDU. Based on the parameter (5) or (6), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 11 below:

[0422] Table 11

[0423]

[0424]

[0425]

[0426] In a fourth implementation, the above parameters (7) and (8) are based on the LTF sequence corresponding to the above Table 4, and the LTF sequence corresponding to the first 480 MHz is intercepted as the LTF sequence of the 480 MHz PPDU. Based on the parameter (7) or (8), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 12 below:

[0427] Table 12

[0428]

[0429]

[0430]

[0431] In a fifth implementation, the above parameters (9) and (10) are based on the LTF sequence corresponding to the above Table 5, and the LTF sequence corresponding to the first 480 MHz is intercepted as the LTF sequence of the 480 MHz PPDU. Based on the parameter (9) or (10), and the above Figure 6The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 13 below:

[0432] Table 13

[0433]

[0434]

[0435] In a sixth implementation, the above parameters (11) and (12) are based on the LTF sequence corresponding to the above Table 6, and the LTF sequence corresponding to the first 480 MHz is intercepted as the LTF sequence of the 480 MHz PPDU. Based on the parameter (11) or (12), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 14 below:

[0436] Table 14

[0437]

[0438]

[0439] In the seventh implementation, the above parameters (13) and (14) are based on the LTF sequence corresponding to the above Table 7, and the LTF sequence corresponding to the first 480MHz is intercepted as the LTF sequence of the 480MHz PPDU. Based on the parameter (13) or (14), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 15 below:

[0440] Table 15

[0441]

[0442]

[0443]

[0444] In an eighth implementation, the above parameters (15) and (16) are based on the LTF sequence corresponding to the above Table 8, and the LTF sequence corresponding to the first 480 MHz is intercepted as the LTF sequence of the 480 MHz PPDU. Based on the parameter (15) or (16), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 16 below:

[0445] Table 16

[0446]

[0447]

[0448]

[0449] In a ninth implementation, the parameters (17) and (18) are based on the LTF sequence corresponding to Table 1, and the LTF sequence corresponding to 480 MHz is truncated as the LTF sequence of the 480 MHz PPDU, based on the parameters (17) or (18), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 17 below:

[0450] Table 17

[0451]

[0452]

[0453]

[0454] In a tenth implementation, the above parameters (19) and (20) are based on the LTF sequence corresponding to the above Table 2, and the LTF sequence corresponding to 480MHz is intercepted as the LTF sequence of the 480MHz PPDU, based on the parameter (19) or (20), and the above Figure 6The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 18 below:

[0455] Table 18

[0456]

[0457]

[0458]

[0459] In the eleventh implementation, the above parameters (21) and (22) are based on the LTF sequence corresponding to the above Table 3, and the LTF sequence corresponding to 480MHz is intercepted as the LTF sequence of the 480MHz PPDU, based on the parameter (21) or (22), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 19 below:

[0460] Table 19

[0461]

[0462]

[0463] In the twelfth implementation, the above parameters (23) and (24) are based on the LTF sequence corresponding to the above Table 4, and the LTF sequence corresponding to 480MHz is truncated as the LTF sequence of the 480MHz PPDU, based on the parameter (23) or (24), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 20 below:

[0464] Table 20

[0465]

[0466]

[0467] In the thirteenth implementation, the above parameters (25) and (26) are based on the LTF sequence corresponding to the above Table 5, and the LTF sequence corresponding to 480MHz is truncated as the LTF sequence of the 480MHz PPDU, based on the parameter (25) or (26), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 21 below:

[0468] Table 21

[0469]

[0470]

[0471]

[0472] In the fourteenth implementation, the above parameters (27) and (28) are based on the LTF sequence corresponding to the above Table 6, and the LTF sequence corresponding to 480MHz is truncated as the LTF sequence of the 480MHz PPDU, based on the parameter (27) or (28), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 22 below:

[0473] Table 22

[0474]

[0475]

[0476]

[0477] In a fifteenth implementation, the parameters (29) and (30) are based on the LTF sequence corresponding to Table 7, and the LTF sequence corresponding to 480 MHz is truncated as the LTF sequence of the 480 MHz PPDU, based on the parameters (29) or (30), and the above Figure 6The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 23 below:

[0478] Table 23

[0479]

[0480]

[0481]

[0482] In a sixteenth implementation, the parameters (31) and (32) are based on the LTF sequence corresponding to Table 8, and the LTF sequence corresponding to 480 MHz is truncated as the LTF sequence of the 480 MHz PPDU, based on the parameters (31) or (32), and the above Figure 6 The RU / MRU shown in FIG. 1 can obtain the PAPR results of the 480 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees), where the PAPR results of the RU / MRU at different pilot phase rotation angles are Figure 6 The RU / MRU styles shown correspond one to one, as shown in Table 24 below:

[0483] Table 24

[0484]

[0485]

[0486]

[0487] The above describes in detail the MRU patterns and LTF sequences corresponding to 640MHz and 480MHz. In this embodiment, the specific size of the bandwidth is not limited. For example, the future bandwidth size may be 2×480MHz. The design of the MRU pattern and LTF sequence corresponding to the 2×480MHz bandwidth can refer to the above implementation method, and examples will not be given one by one here.

[0488] S420, the transmitting end sends the PPDU to the receiving end, and correspondingly, the receiving end receives the PPDU from the transmitting end.

[0489] For example, taking the case where the transmitting end may be an AP and the receiving end may be an STA, the STA may be any one of one or more STAs. In this embodiment, no limitation is imposed on the transmission mode of the PPDU, and the description of the PPDU transmission mode between the AP and the STA specified in the existing protocol or future protocol may be referred to, which will not be described in detail here.

[0490] In an example, the transmitting end is an AP and the receiving end is an STA, and the AP can send downlink information (such as downlink data) to the STA based on the frequency resources.

[0491] In another example, the transmitting end is a STA and the receiving end is an AP, and the STA can send uplink information (such as uplink data) to the AP based on the frequency resource.

[0492] Optionally, the transmitting end is an AP and the receiving end is an AP; or, the transmitting end is an STA and the receiving end is an STA, which is not limited in this application.

[0493] It should be noted that, in this embodiment, for the sake of convenience of description, the two parties in communication are referred to as AP and STA, but it should be understood that the names of the communication devices in this embodiment are not limited, as long as they can achieve the corresponding functions. For example, AP can be replaced by access point, base station or terminal device, etc., and STA can be replaced by non-AP site, non-AP STA, user, terminal device, etc., and examples are not given one by one here.

[0494] S430: The receiving end performs channel estimation according to the first sequence passing through the wireless channel and a preset first sequence.

[0495] It should be understood that the preset first sequence is the first sequence of step S410. After receiving the PPDU and parsing it, the receiving end obtains the first sequence passing through the wireless channel and compares it with the preset first sequence to complete channel estimation. The specific implementation method of channel estimation can refer to the existing solution and is not described here.

[0496] Based on the above technical solution, by designing a low PAPR LTF sequence suitable for a larger bandwidth (for example, 640 MHz or 480 MHz), it is possible to ensure a low PAPR over the entire bandwidth and a low PAPR for the RU / MRU. In addition, in the scenario of multi-spatial stream transmission, the PAPRs of multiple spatial streams are low, which can improve the signal transmission quality and enhance the user's communication performance.

[0497] It should be understood that the sequence numbers of the above processes do not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0498] It should also be understood that in the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0499] It should also be understood that in some of the above embodiments, the devices in the existing network architecture are mainly used as examples for exemplary description, and it should be understood that the embodiments of the present application do not limit the specific form of the devices. For example, devices that can achieve the same function in the future are applicable to the embodiments of the present application.

[0500] It can be understood that in the above-mentioned various method embodiments, the methods and operations implemented by devices (such as AP and STA) can also be implemented by components (such as chips or circuits) that can be used in devices.

[0501] It can also be understood that in each embodiment of the present application, the interaction between AP and STA is mainly used as an example for illustrative description, and the present application is not limited to this. AP can be replaced by a sending device, and the sending device can be a network device or a terminal device; STA can be replaced by a receiving device, and the receiving device can be a network device or a terminal device.

[0502] It can also be understood that some optional features in the embodiments of the present application may not depend on other features in some scenarios, or may be combined with other features in some scenarios, without limitation.

[0503] The method embodiment of the present application is described above, and the corresponding device embodiment is briefly introduced below. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so the part not described in detail can refer to the previous method embodiment.

[0504] Figure 7 Schematic diagram of a communication device provided in an embodiment of the present application. Figure 7 As shown, the communication device 1000 may include a transceiver unit 1010 and / or a processing unit 1020. The transceiver unit 1010 may communicate with the outside, and the processing unit 1020 is used to process data / information. The transceiver unit 1010 may also be called a communication interface or a communication unit.

[0505] In a possible implementation, the communication device 1000 may be the transmitting end in the above method 700, or may be a chip for implementing the functions of the transmitting end in the above method 700. The communication device 1000 may implement a process corresponding to the execution of the transmitting end in the above method 700, wherein the processing unit 1020 is used to execute the processing-related operations of the transmitting end in the above method 700, and the transceiver unit 1010 is used to execute the transceiver-related operations of the transmitting end in the above method 700.

[0506] Exemplarily, the processing unit 1020 is used to generate a PPDU, the PPDU includes a first field, the first field is used to carry a first sequence, the first sequence is used for channel estimation, the first sequence corresponds to a first bandwidth, and the first bandwidth is greater than 320 MHz; the transceiver unit 1010 is used to send the PPDU.

[0507] It should be understood that the above content is only for illustrative purposes, and the communication device 1000 can also implement other steps, actions or methods related to the sending end in the above method 700, which will not be repeated here.

[0508] In another possible implementation, the communication device 1000 may implement a process corresponding to that performed by the receiving end in the above method embodiment 200, wherein the transceiver unit 1010 is used to perform the transceiver-related operations of the receiving end in the above method embodiment 200.

[0509] Optionally, in this implementation, the communication device 1000 may further include a processing unit 1020, and the processing unit 1020 is used to execute operations related to the processing of the receiving end in the above method embodiment 200.

[0510] Exemplarily, the transceiver unit 1010 is used to receive a physical layer protocol data unit PPDU, the PPDU includes a first field, the first field carries a first sequence passing through a wireless channel, the first sequence passing through the wireless channel corresponds to a first bandwidth, and the first bandwidth is greater than 320 MHz; the processing unit 1020 is used to perform channel estimation based on the first sequence passing through the wireless channel and a preset first sequence.

[0511] It should be understood that the above content is only for illustrative purposes, and the communication device 1000 can also implement other steps, actions or methods related to the receiving end in the above method 700, which will not be repeated here.

[0512] In another possible implementation, the communication device 1000 can implement the steps, actions or methods related to the transmitting end in the above method 700, or implement the steps, actions or methods related to the receiving end in the above method 700. The details of the communication device 1000 executing the above method 700 have been described in detail in the above method embodiment, and will not be repeated here for the sake of brevity.

[0513] It should be understood that the communication device 1000 herein is embodied in the form of a functional unit. The term "unit" herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (e.g., a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit, and / or other suitable components that support the described functions.

[0514] The above-mentioned communication device 1000 has the function of implementing the corresponding steps performed by the transmitting end in the above-mentioned method, or the above-mentioned communication device 1000 has the function of implementing the corresponding steps performed by the receiving end in the above-mentioned method. The functions can be implemented by hardware, or can be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions; for example, the transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor to respectively perform the transceiver operations and related processing operations in each method embodiment.

[0515] In addition, the above-mentioned transceiver unit may also be a transceiver circuit (for example, it may include a receiving circuit and a transmitting circuit), and the processing unit may be a processing circuit. In an embodiment of the present application, the communication device 1000 may be a transmitting end or a receiving end in the aforementioned embodiment, or may be a chip or a chip system, for example: a system on chip (SoC). Among them, the transceiver unit may be an input and output circuit, a communication interface, and the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip. This is not limited here.

[0516] Figure 8 is another schematic structural diagram of a communication device provided in an embodiment of the present application. Figure 8 As shown, the communication device 2000 includes: at least one processor 2010 and at least one transceiver 2020, the processor 2010 is coupled to the memory, and is used to execute instructions stored in the memory to control the transceiver 2020 to send signals and / or receive signals. Optionally, the communication device 2000 also includes a memory 2030 for storing instructions.

[0517] In one example, the processor 2010 is used to generate a PPDU, the PPDU includes a first field, the first field is used to carry a first sequence, the first sequence is used for channel estimation, the first sequence corresponds to a first bandwidth, and the first bandwidth is greater than 320 MHz; the transceiver 2020 is used to send the PPDU.

[0518] In another example, the transceiver 2020 is used to receive a PPDU, the PPDU includes a first field, the first field carries a first sequence passing through a wireless channel, the first sequence passing through the wireless channel corresponds to a first bandwidth, and the first bandwidth is greater than 320 MHz; the processor 2010 is used to perform channel estimation based on the first sequence passing through the wireless channel and a preset first sequence.

[0519] It should be understood that the above content is only for illustrative purposes. The communication device 2000 can also implement the transmitter, receiver, or other steps, actions or methods related to the transmitter and receiver in the above method 700. For the sake of brevity, they will not be repeated here.

[0520] It should be understood that in the communication device 2000 or the communication device 2200, the processor and the memory can be combined into a processing device, and the processor is used to execute the program code stored in the memory to implement the above functions. In specific implementation, the memory can also be integrated into the processor or independent of the processor.

[0521] It should also be understood that the transceiver 2020 or transceiver 2020 may include a receiver (or receiver) and a transmitter (or transmitter). The transceiver 2020 or transceiver 2020 may further include an antenna, and the number of antennas may be one or more. The transceiver 2020 or transceiver 2020 may be a communication interface or interface circuit.

[0522] The processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0523] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory and / or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0524] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0525] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0526] Fig. 9 FIG. 3 is a schematic diagram of a chip system 3000 provided in an embodiment of the present application. Fig. 9 As shown, the chip system 3000 (or may also be called a processing system) includes a logic circuit 3010 and an input / output interface (input / output interface) 3020.

[0527] Among them, the logic circuit 3010 can be a processing circuit in the chip system 3000. The logic circuit 3010 calls the instructions in the storage unit so that the chip system 3000 can implement the methods and functions of each embodiment of the present application. The input / output interface 3020 can be an input / output circuit in the chip system 3000, outputting information processed by the logic circuit 3010, or inputting data or signaling information to be processed into the logic circuit 3010 for processing.

[0528] For example, the logic circuit 3010 is used to generate a PPDU, the PPDU includes a first field, the first field is used to carry a first sequence, the first sequence is used for channel estimation at the receiving end, the first sequence corresponds to a first bandwidth, and the first bandwidth is greater than 320 MHz; the input / output interface 3020 is used to send the PPDU to the receiving end.

[0529] For example, the input / output interface 3020 is used to receive PPDU, the PPDU includes a first field, the first field carries a first sequence passing through the wireless channel, the first sequence passing through the wireless channel corresponds to a first bandwidth, and the first bandwidth is greater than 320 MHz; the logic circuit 3010 is used to perform channel estimation based on the first sequence passing through the wireless channel and a preset first sequence.

[0530] It should be understood that the details of the input / output interface 3020 and the logic circuit 3010 executing the above method have been described in detail in the above method embodiment, and for the sake of brevity, they will not be repeated here.

[0531] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, which includes: computer program code, when the computer program code is run on a computer, the computer executes the method in the above method embodiment.

[0532] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable medium, which stores a program code. When the program code runs on a computer, the computer executes the method in the above method embodiment.

[0533] According to the method provided in the embodiment of the present application, the present application also provides a system, which includes the aforementioned transmitting end and / or receiving end, namely AP and / or STA.

[0534] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0535] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0536] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0537] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0538] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0539] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0540] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: Applied to the sending end, the method includes: Generate a physical layer protocol data unit PPDU, where the PPDU includes a first field, where the first field is used to carry a first sequence, where the first sequence is used for a receiving end to perform channel estimation, where the first sequence corresponds to a first bandwidth, and where the first bandwidth is greater than 320 MHz; The PPDU is sent to the receiving end.

2. The method according to claim 1, characterized in that: The first sequence includes N subsequences, and any subsequence in the N subsequences is obtained according to a base sequence and a parameter corresponding to the subsequence.

3. The method according to claim 2, characterized in that When the first bandwidth is 640 MHz, the parameters corresponding to the N subsequences [c1, ..., c 16 ]Meet any of the following: [c1,…,c 16 ]=±[1,-1,1,1,1,-1,-1,-1,-1,1,-1,-1,-1,1,1,1]; or, [c1,…,c 16 ]=±[1,1,1,-1,-1,-1,1,-1,-1,-1,-1,1,1,1,-1,1]; or, [c1,…,c 16 ]=±[1,1,-1,1,-1,-1,-1,1,-1,-1,1,-1,1,1,1,-1]; or, [c1,…,c 16 ]=±[-1,1,1,1,-1,1,-1,-1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 16 ]=±[1,1,-1,1,-1,-1,-1,1,-1,1,1,-1,1,1,1,-1]; or, [c1,…,c 16 ]=±[-1,1,1,1,-1,1,1,-1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 16 ]=±[1,1,-1,1,-1,-1,-1,1,1,-1,1,-1,-1,1,-1,-1]; or, [c1,…,c 16 ]=±[-1,-1,1,-1,-1,1,-1,1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 16 ]=±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1,1,1,-1,1]; or, [c1,…,c 16 ]=±[1,-1,1,1,1,1,1,-1,-1,-1,-1,1,1,1,-1,1]; or, [c1,…,c 16 ]=±[1,-1,1,-1,-1,1,-1,-1,1,1,1,1,-1,-1,-1,-1]; or, [c1,…,c 16 ]=±[-1,-1,-1,-1,1,1,1,1,-1,-1,1,-1,-1,1,-1,1]; or, [c1,…,c 16 ]=±[1,-1,-1,-1,-1,1,1,-1,1,1,1,1,-1,1,-1,-1]; or, [c1,…,c 16 ]=±[-1,-1,1,-1,1,1,1,1,-1,1,1,-1,-1,-1,-1,1]; or, [c1,…,c 16 ]=±[1,-1,1,-1,-1,-1,-1,-1,1,1,-1,1,-1,1,1,-1]; or, [c1,…,c 16 ]=±[-1,1,1,-1,1,-1,1,1,-1,-1,-1,-1,-1,1,-1,1]。 4. The method according to claim 2, characterized in that: When the first bandwidth is 480 MHz, the parameters corresponding to the N subsequences [c1, ..., c 12 ]Meet any of the following: [c1,…,c 12 ]=±[1,-1,1,1,1,-1,-1,-1,-1,1,-1,-1]; or, [c1,…,c 12 ]=±[-1,-1,1,-1,-1,-1,-1,1,1,1,-1,1]; or, [c1,…,c 12 ]=±[1,1,-1,1,-1,-1,-1,1,-1,-1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,-1,-1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 12 ]=±[1,1,-1,1,-1,-1,-1,1,-1,1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,1,-1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 12 ]=±[1,1,-1,1,-1,-1,-1,1,1,-1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,-1,1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 12 ]=±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1]; or, [c1,…,c 12 ]=±[1,1,1,-1,-1,-1,-1,1,1,1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,1,-1,-1,1,-1,-1,1,1,1,1]; or, [c1,…,c 12 ]=±[1,1,1,1,-1,-1,1,-1,-1,1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,1,-1,1,1,1,1]; or, [c1,…,c 12 ]=±[1,1,1,1,-1,1,1,-1,-1,-1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,1,-1,-1,-1,-1,-1,1,1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,1,1,-1,-1,-1,-1,-1,1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,-1,-1,-1,1,1,1]; or, [c1,…,c 12 ]=±[1,1,1,-1,-1,-1,1,-1,-1,-1,-1,1]; or, [c1,…,c 12 ]=±[-1,-1,-1,1,-1,-1,1,-1,1,1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,1,1,-1,1,-1,-1,1,-1,-1,-1]; or, [c1,…,c 12 ] = ±[-1, -1, -1, 1, -1, 1, -1, 1, 1, -1]; or, [c1,…,c 12 ]=±[-1,1,1,1,-1,1,1,-1,1,-1,-1,-1]; or, [c1,…,c 12 ] = ±[-1, -1, -1, 1, 1, -1, 1, -1, -1, -1, -1]; or, [c1,…,c 12 ] = ±[-1, -1, 1, -1, -1, 1, -1, 1, -1, -1, -1]; or, [c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,1,1,1,1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,1,1,1,1,1,-1,-1,-1,-1,1]; or, [c1,…,c 12 ]=±[-1,1,-1,-1,1,1,1,1,-1,-1,-1,-1]; or, [c1,…,c 12 ]=±[-1,-1,-1,-1,1,1,1,1,-1,-1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,1,-1,1,1,1,1,-1,1,-1,-1]; or, [c1,…,c 12 ] = ±[-1, -1, 1, -1, 1, 1, 1, -1, 1, 1, -1]; or, [c1,…,c 12 ]=±[-1,-1,-1,-1,1,1,-1,1,-1,1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,1,-1,1,-1,1,1,-1,-1,-1,-1]。 5. A communication method, characterized in that: Applied to the receiving end, including: Receive a physical layer protocol data unit PPDU, the PPDU including a first field, the first field carrying a first sequence passing through a wireless channel, the first sequence passing through the wireless channel corresponding to a first bandwidth, the first bandwidth being greater than 320 MHz; Channel estimation is performed according to the first sequence passing through the wireless channel and a preset first sequence.

6. The method according to claim 5, characterized in that The preset first sequence includes N subsequences, and any subsequence in the N subsequences is obtained according to a base sequence and parameters corresponding to the subsequence.

7. The method according to claim 6, characterized in that When the first bandwidth is 640 MHz, the parameters corresponding to the N subsequences [c1, ..., c 16 ]Meet any of the following: [c1,…,c 16 ]=±[1,-1,1,1,1,-1,-1,-1,-1,1,-1,-1,-1,1,1,1]; or, [c1,…,c 16 ]=±[1,1,1,-1,-1,-1,1,-1,-1,-1,-1,1,1,1,-1,1]; or, [c1,…,c 16 ]=±[1,1,-1,1,-1,-1,-1,1,-1,-1,1,-1,1,1,1,-1]; or, [c1,…,c 16 ]=±[-1,1,1,1,-1,1,-1,-1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 16 ]=±[1,1,-1,1,-1,-1,-1,1,-1,1,1,-1,1,1,1,-1]; or, [c1,…,c 16 ]=±[-1,1,1,1,-1,1,1,-1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 16 ]=±[1,1,-1,1,-1,-1,-1,1,1,-1,1,-1,-1,1,-1,-1]; or, [c1,…,c 16 ]=±[-1,-1,1,-1,-1,1,-1,1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 16 ]=±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1,1,1,-1,1]; or, [c1,…,c 16 ]=±[1,-1,1,1,1,1,1,-1,-1,-1,-1,1,1,1,-1,1]; or, [c1,…,c 16 ]=±[1,-1,1,-1,-1,1,-1,-1,1,1,1,1,-1,-1,-1,-1]; or, [c1,…,c 16 ]=±[-1,-1,-1,-1,1,1,1,1,-1,-1,1,-1,-1,1,-1,1]; or, [c1,…,c 16 ]=±[1,-1,-1,-1,-1,1,1,-1,1,1,1,1,-1,1,-1,-1]; or, [c1,…,c 16 ]=±[-1,-1,1,-1,1,1,1,1,-1,1,1,-1,-1,-1,-1,1]; or, [c1,…,c 16 ]=±[1,-1,1,-1,-1,-1,-1,-1,1,1,-1,1,-1,1,1,-1]; or, [c1,…,c 16 ]=±[-1,1,1,-1,1,-1,1,1,-1,-1,-1,-1,-1,1,-1,1]。 8. The method according to claim 6, characterized in that When the first bandwidth is 480 MHz, the parameters corresponding to the N subsequences [c1, ..., c 12 ]Meet any of the following: [c1,…,c 12 ]=±[1,-1,1,1,1,-1,-1,-1,-1,1,-1,-1]; or, [c1,…,c 12 ]=±[-1,-1,1,-1,-1,-1,-1,1,1,1,-1,1]; or, [c1,…,c 12 ]=±[1,1,-1,1,-1,-1,-1,1,-1,-1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,-1,-1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 12 ]=±[1,1,-1,1,-1,-1,-1,1,-1,1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,1,-1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 12 ]=±[1,1,-1,1,-1,-1,-1,1,1,-1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,-1,1,1,-1,-1,-1,1,-1,1,1]; or, [c1,…,c 12 ]=±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1]; or, [c1,…,c 12 ]=±[1,1,1,-1,-1,-1,-1,1,1,1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,1,-1,-1,1,-1,-1,1,1,1,1]; or, [c1,…,c 12 ]=±[1,1,1,1,-1,-1,1,-1,-1,1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,1,-1,1,1,1,1]; or, [c1,…,c 12 ]=±[1,1,1,1,-1,1,1,-1,-1,-1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,1,-1,-1,-1,-1,-1,1,1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,1,1,-1,-1,-1,-1,-1,1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,-1,-1,-1,1,1,1]; or, [c1,…,c 12 ]=±[1,1,1,-1,-1,-1,1,-1,-1,-1,-1,1]; or, [c1,…,c 12 ]=±[-1,-1,-1,1,-1,-1,1,-1,1,1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,1,1,-1,1,-1,-1,1,-1,-1,-1]; or, [c1,…,c 12 ] = ±[-1, -1, -1, 1, -1, 1, -1, 1, 1, -1]; or, [c1,…,c 12 ]=±[-1,1,1,1,-1,1,1,-1,1,-1,-1,-1]; or, [c1,…,c 12 ] = ±[-1, -1, -1, 1, 1, -1, 1, -1, -1, -1, -1]; or, [c1,…,c 12 ] = ±[-1, -1, 1, -1, -1, 1, -1, 1, -1, -1, -1]; or, [c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,1,1,1,1,-1,1]; or, [c1,…,c 12 ]=±[1,-1,1,1,1,1,1,-1,-1,-1,-1,1]; or, [c1,…,c 12 ]=±[-1,1,-1,-1,1,1,1,1,-1,-1,-1,-1]; or, [c1,…,c 12 ]=±[-1,-1,-1,-1,1,1,1,1,-1,-1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,1,-1,1,1,1,1,-1,1,-1,-1]; or, [c1,…,c 12 ] = ±[-1, -1, 1, -1, 1, 1, 1, -1, 1, 1, -1]; or, [c1,…,c 12 ]=±[-1,-1,-1,-1,1,1,-1,1,-1,1,1,-1]; or, [c1,…,c 12 ]=±[-1,1,1,-1,1,-1,1,1,-1,-1,-1,-1]。 9. A communication device, characterized in that: The method comprises a unit or a module for executing the method as claimed in any one of claims 1 to 4.

10. A communication device, characterized in that: The method comprises a unit or a module for executing the method as claimed in any one of claims 5 to 8.

11. A communication device, characterized in that: The device comprises a processor, wherein the processor is configured to execute a computer program or instruction stored in a memory, so that the communication device performs the method according to any one of claims 1 to 4.

12. A communication device, characterized in that: The device comprises a processor, wherein the processor is configured to execute a computer program or instruction stored in a memory, so that the communication device performs the method according to any one of claims 5 to 8.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program or instruction, and when the computer program or instruction is executed on the communication device, the communication device executes the method as claimed in any one of claims 1 to 4, or executes the method as claimed in any one of claims 5 to 8.

14. A computer program product, characterized in that The computer program product comprises a computer program or instructions for executing the method according to any one of claims 1 to 4 , or comprises a computer program or instructions for executing the method according to any one of claims 5 to 8 .

Images