Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and apparatus. The method may be applied to a WLAN system that supports IEEE 802.11ax next-generation WiFi protocols such as 802.11be, WiFi 7 or EHT and 802.11 series protocols such as 802.11be next-generation and WiFi 8, and may also be applied to a UWB-based wireless personal area network system, a sensing system, etc. The method comprises: a sending end generating a physical protocol data unit (PPDU), and sending 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 the receiving end to perform channel estimation, the first sequence corresponds to a first bandwidth, and the first bandwidth is greater than 320 MHz. In the solution of the present application, a channel estimation sequence corresponding to a bandwidth greater than 320 MHz is designed, so as to support signal transmission in a large-bandwidth (such as 640 MHz and 480 MHz) scenario.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on July 29, 2023, with application number 202310952235.X, and priority to the Chinese patent application with the invention name “Communication Method and Communication Device”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and more specifically, to a communication method and a communication device. Background Art

[0003] With the rapid growth of wireless traffic, users have increasingly 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 networks (WLANs) continue to develop and evolve to meet people's increasingly high requirements for wireless transmission.

[0004] Since the 802.11a / g standards, WLAN has evolved through the 802.11n, 802.11ac, 802.11ax, and finally 802.11be standards. 802.11be uses orthogonal frequency division multiple access (OFDMA) technology to support the transmission of physical layer protocol data units (PPDUs) with a maximum bandwidth of 320MHz, achieving ultra-high transmission rates and supporting a large number of users. However, the increased number of subcarriers in a large bandwidth results in a more severe peak-to-average power ratio (PAPR), causing nonlinear signal distortion and degrading system performance.

[0005] Summary of the Invention

[0006] 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.).

[0007] In a first aspect, a communication method is provided. The method can be executed by a transmitting end or by a component (eg, a chip, a circuit, or a module) configured in the transmitting end, and this application does not limit this.

[0008] The method includes: generating a physical layer protocol data unit (PPDU), the PPDU including a first field, the first field being used to carry a first sequence, the first sequence being used for channel estimation at a receiving end, the first sequence corresponding to a first bandwidth, the first bandwidth being greater than 320 MHz; and sending the PPDU to a receiving end.

[0009] 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.

[0010] 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, and this application does not limit this. For example, one communication scenario may be: the transmitting end is an AP and the receiving end is a STA; one communication scenario may be: the transmitting end is a STA and the receiving end is an AP; one communication scenario may be: the transmitting end is a STA and the receiving end is a STA; one communication scenario may be: the transmitting end is an AP and the receiving end is an AP.

[0011] Based on the above solution, by designing a first sequence (i.e., a long training field (LTF) sequence) corresponding to bandwidths greater than 320 MHz, signal transmission in future wide bandwidth scenarios (e.g., 640 MHz, 480 MHz, etc.) is supported. This first sequence has a low PAPR across the entire bandwidth and also has a low PAPR across the RU / MRU. In multi-spatial stream transmission scenarios, this first sequence also has a low PAPR across multiple spatial streams, thereby ensuring system transmission performance.

[0012] In conjunction with the first aspect, in certain implementations of the first aspect, the first sequence includes N subsequences, and any subsequence in the N subsequences is obtained based on 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 and the second base sequence is LTF80MHz_4x_right. The parameter corresponding to any subsequence can be ±1.

[0013] Based on the above solution, using the first base sequence and the second base sequence as the base sequence, any subsequence of the N subsequences in the first sequence obtained by multiplying the base sequence by ±1 can not only ensure a low PAPR across the entire bandwidth, but also a low PAPR per RU / MRU. In multi-spatial stream transmission scenarios, this first sequence also has a low PAPR across multiple spatial streams, fully ensuring communication performance for all users.

[0014] In combination with the first aspect, in some implementations of the first aspect, when the first bandwidth is 640 MHz, the parameters corresponding to the N subsequences [c1, ..., c 16 ]Meet one or more of the following:

[0015] [c9,c 10 ,c 11 ,c 12 ]=±[-c8,c7,-c6,c5];

[0016] [c 13 ,c 14 ,c 15 ,c 16 ]=±[-c4,c3,-c2,c1];

[0017] [c1,c2,c3,c4]=±[-c8,c7,-c6,c5];

[0018] [c9,c 10 ,c 11 ,c 12 ]=±[-c 13 ,c 14 ,-c 15 ,c 16 ].

[0019] For example, [c1, c2, c3, c4] corresponds to the first 160 MHz bandwidth, [c5, c6, c7, c8] corresponds 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 160MHz bandwidth. By limiting the parameters ci corresponding to at least two 160MHz bandwidths to meet the characteristics of the above-mentioned combined sequence, 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 conditions of the combined sequence, which can relatively reduce the amount of calculation, reduce the difficulty and complexity of calculation, and obtain the LTF sequence of the above-mentioned 640MHz PPDU faster and more accurately.

[0020] Optionally, the parameters ci corresponding to at least two 160MHz bandwidths are in symmetrical positions and the symmetrical points are not within any of the above 160MHz 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.

[0021] Based on the above solution, when the parameters corresponding to the first sequence meet the aforementioned symmetric splicing conditions, the 640MHz LTF sequence has a low PAPR across the entire bandwidth and a low PAPR on the corresponding RU / MRU. In multi-spatial stream transmission scenarios, the first sequence also has a low PAPR across multiple spatial streams, ensuring signal transmission quality and improving system transmission performance.

[0022] In conjunction with the first aspect, in certain implementations of the first aspect, when the first bandwidth is 640 MHz, parameters corresponding to the N subsequences satisfy any one of the following:

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

[0028] [c1,…,c 16 ]=±[-1,1,1,1,-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,-1,1]; or,

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

[0037] [c1,…,c 16 ]=±[1,-1,1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,1,-1,1]; or,

[0038] [c1,…,c 16 ]=±[-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,1].

[0039] Based on the above scheme, the parameters corresponding to the first sequence provided above [c1,…,c 16 ], which enables the corresponding first sequence to have a low PAPR across the entire bandwidth or per RU / MRU. Furthermore, in multi-spatial stream transmission scenarios, the PAPR of the first sequence across multiple spatial streams is also low, which makes subsequent channel estimation at the receiver more accurate and ensures system transmission performance.

[0040] In combination with the first aspect, in some implementations of the first aspect, when the first bandwidth is 480 MHz, the parameters corresponding to the first sequence [c1, ..., c 12 ]Meet any of the following:

[0041] [c1,…,c 12 ]=±[1,-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,-1,1]; or,

[0043] [c1,…,c 12 ]=±[1,1,-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]; or,

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

[0049] [c1,…,c 12 ]=±[1,-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]; or,

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

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

[0058] [c1,…,c12 ]=±[1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,1]; or,

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

[0069] [c1,…,c 12 ]=±[-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]; or,

[0071] [c1,…,c 12 ]=±[-1,-1,-1,-1,1,1,-1,1,-1,1,1,-1]; or,

[0072] [c1,…,c 12 ]=±[-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1].

[0073] For example, for the 480MHz bandwidth, some of the MRU patterns and LTF sequences designed for the 640MHz bandwidth can be reused. For example, considering the RU / MRU of the 640MHz that is less than or equal to 5*996, and considering the pilot phase rotation caused 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. Based on the above solution, a low PAPR sequence suitable for the 480MHz bandwidth can be quickly obtained, which supports large-bandwidth signal transmission while improving signal transmission quality.

[0074] In a second aspect, a communication method is provided. The method can be executed by a receiving end or by a component (for example, a chip, circuit or module, etc.) configured in the receiving end, and this application does not limit this.

[0075] The method includes: receiving 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 at the receiving end of the wireless channel corresponding to a first bandwidth, and the first bandwidth being greater than 320 MHz; and performing channel estimation based on the first sequence passing through the wireless channel and a preset first sequence.

[0076] Exemplarily, the first bandwidth is 640 MHz or 480 MHz.

[0077] Based on the above solution, by designing a first sequence (i.e., LTF sequence) for bandwidths greater than 320MHz, it supports signal transmission in future large bandwidth scenarios (such as 640MHz, 480MHz, etc.). Furthermore, this first sequence not only has a low PAPR across the entire bandwidth, but also a low PAPR across the RU / MRU. Furthermore, in multi-spatial stream transmission scenarios, the first sequence also has a low PAPR across multiple spatial streams, facilitating more accurate channel estimation results at the receiving end based on the first sequence passing through the wireless channel and a preset first sequence, thereby ensuring system transmission performance.

[0078] 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 and the second base sequence is LTF80MHz_4x_right, and the parameter corresponding to any subsequence can be ±1.

[0079] In conjunction with the second aspect, in certain implementations of the second aspect, when the first bandwidth is 640 MHz, the parameters corresponding to the first sequence [c1, ..., c 16 ]Meet one or more of the following:

[0080] [c9,c 10 ,c 11 ,c 12 ]=±[-c8,c7,-c6,c5];

[0081] [c 13 ,c 14 ,c 15 ,c 16 ]=±[-c4,c3,-c2,c1];

[0082] [c1,c2,c3,c4]=±[-c8,c7,-c6,c5];

[0083] [c9,c 10 ,c 11 ,c 12 ]=±[-c 13 ,c 14 ,-c 15 ,c 16 ].

[0084] In conjunction with the second aspect, in certain implementations of the second aspect, when the first bandwidth is 640 MHz, the parameters corresponding to the first sequence [c1, ..., c 16]Meet one or more of the following:

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

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

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

[0099] [c1,…,c 16 ]=±[1,-1,1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,1,-1,1]; or,

[0100] [c1,…,c 16 ]=±[-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,1].

[0101] In conjunction with the second aspect, in certain implementations of the second aspect, when the first bandwidth is 480 MHz, the parameters corresponding to the first sequence [c1, ..., c 12 ]Meet any of the following:

[0102] [c1,…,c 12 ]=±[1,-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,-1,1]; or,

[0104] [c1,…,c 12 ]=±[1,1,-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]; or,

[0106] [c1,…,c12 ]=±[1,1,-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,-1,1,1]; or,

[0110] [c1,…,c 12 ]=±[1,-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]; or,

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

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

[0121] [c1,…,c 12 ]=±[-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,-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,-1]; or,

[0130] [c1,…,c 12 ]=±[-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]; or,

[0132] [c1,…,c 12 ]=±[-1,-1,-1,-1,1,1,-1,1,-1,1,1,-1]; or,

[0133] [c1,…,c 12 ]=±[-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1].

[0134] The beneficial effects of the above-mentioned second aspect and certain implementation methods of the second aspect can be referred to the corresponding description of the first aspect, and will not be repeated here.

[0135] 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 this application.

[0136] The device includes: a processing unit, used to generate a physical layer protocol data unit PPDU, the PPDU including a first field, the first field being used to carry a first sequence, the first sequence being used for a receiving end to perform channel estimation, the first sequence corresponding to a first bandwidth, and the first bandwidth being greater than 320 MHz; and a transceiver unit, used to send the PPDU to a receiving end.

[0137] 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.

[0138] 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.

[0139] 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 this application.

[0140] The device includes: a transceiver unit, configured to 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; and a processing unit, configured to perform channel estimation based on the first sequence passing through the wireless channel and a preset first sequence.

[0141] 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.

[0142] 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.

[0143] In a fifth aspect, a communication device is provided, comprising a processor configured to call and execute a computer program stored in a memory and control a transceiver to transmit and receive signals, so that the communication device performs the method as described in any of the first or second aspects, 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.

[0144] In a sixth aspect, a communication device is provided, comprising a processor configured to process data and / or information so as to execute the method of any of the first or second aspects, or any possible implementation of these aspects. Optionally, the communication device may further comprise a communication interface configured to receive data and / or information and transmit the received data and / or information to the processor. Optionally, the communication interface may further be configured to output the data and / or information processed by the processor.

[0145] In a seventh aspect, a chip is provided, comprising a processor configured to execute a program or instruction to cause the chip to perform the method of any one of the first or second aspects, or any possible implementation of these aspects. Optionally, the chip may further comprise a memory configured to store the program or instruction. Optionally, the chip may further comprise the transceiver.

[0146] In an eighth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, which 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.

[0147] In a ninth aspect, a computer program product is provided, comprising a computer program code for implementing a method as in any of the first aspect or the second aspect, or any possible implementation of any of these aspects.

[0148] In a tenth aspect, a communication system is provided, comprising the communication device according to the third and fourth aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0149] FIG1 is a schematic diagram of an application scenario applicable to an embodiment of the present application;

[0150] FIG2 is a schematic diagram of a corresponding MRU pattern in an 80 MHz bandwidth provided by an embodiment of the present application;

[0151] FIG3 is a schematic structural diagram of a multi-stream LTF sequence provided in an embodiment of the present application;

[0152] FIG4 is a flow chart of a communication method 700 provided in an embodiment of the present application;

[0153] Figures (a) to (i) in Figure 5 are schematic diagrams of MRU patterns provided in an embodiment of the present application when the bandwidth is 640 MHz;

[0154] 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;

[0155] FIG7 is a schematic structural diagram of a communication device 1000 provided in an embodiment of the present application;

[0156] FIG8 is a schematic structural diagram of a communication device 2000 provided in an embodiment of the present application;

[0157] FIG9 is a schematic structural diagram of a chip system 3000 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0158] The technical solution in this application will be described below with reference to the accompanying drawings.

[0159] 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.

[0160] Although the embodiments of the present application are mainly described by taking the deployment of a WLAN network, especially a network using the IEEE 802.11 system standard as an example, it will be readily understood by those skilled in the art 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 a BLUETOOTH network, a high-performance wireless local area network (HIPERLAN), a wireless wide area network (WWAN), a wireless personal area network (WPAN), or other networks now known or developed in the future. 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.

[0161] 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), world-wide 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.

[0162] The above-mentioned communication system applicable to the present application is only an example, and the communication system applicable to the present application is not limited to this. It is described uniformly here and will not be repeated below.

[0163] FIG1 is a schematic diagram of an application scenario applicable to an embodiment of the present application. As shown in FIG1 , the communication method provided by the present application is applicable to communication between stations (STAs), wherein the station can be an AP-type station or a non-access point-type station (none access point station, non-AP STA), respectively referred to as AP and non-AP stations. 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-AP STA1, non-AP STA2), and is also applicable to communication between APs (for example, communication between AP1 and AP2), as well as communication between non-AP STAs and non-AP STAs (for example, communication between non-AP STA2 and non-AP STA3).

[0164] For example, an access point is a node that allows a terminal (e.g., a mobile phone) to access a wired (or wireless) network. It is primarily deployed in homes, buildings, and campuses, with a typical coverage radius of tens to hundreds of meters. Of course, it can also be deployed outdoors. An access point acts as a bridge between wired and wireless networks, connecting wireless network clients together and then connecting the wireless network to the Ethernet.

[0165] 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., and the embodiments of the present application are not limited thereto. 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, and 802.11ay.

[0166] A non-AP site may be a wireless communication chip, a wireless sensor, or a wireless communication terminal, and may also be referred to as a user, user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or 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 capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle 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, and the embodiments of the present application are not limited thereto. A non-AP site may be a device that supports the WLAN standard. For example, a non-AP station may support one or more standards in 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.

[0167] Exemplary non-AP sites can be mobile phones, tablets, 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.

[0168] 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 used for sending and receiving packet structures respectively, 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.

[0169] 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.

[0170] (1) Resource unit (RU):

[0171] The 802.11ax standard introduces OFDMA technology, allowing a single bandwidth to be divided into multiple RUs. RU types include 26-tone RU, 52-tone RU, 106-tone RU, 242-tone RU, 484-tone RU, 996-tone RU, and 2×996-tone RU. Each RU can be assigned to a single user, enabling more refined spectrum resource division and more flexible frequency resource scheduling.

[0172] (2) Multiple resource unit (MRU):

[0173] The 802.11be standard defines a new frequency resource unit (MRU), allowing multiple RUs to be allocated to the same user, enabling more flexible frequency resource allocation. The standard defines two small MRU types: 52+26-tone MRU and 106+26-tone MRU. The standard defines two large MRU types: 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.

[0174] The standard currently defines corresponding MRU patterns and LTF sequences for different bandwidths, such as 20MHz, 40MHz, 80MHz, 160MHz, and 320MHz. For example, Figure 2 shows a diagram of the corresponding MRU patterns in an 80MHz bandwidth. In the 802.11be standard, the 484+242-tone MRU patterns in an 80MHz bandwidth include 484+242-tone MRU1, 484+242-tone MRU2, 484+242-tone MRU3, and 484+242-tone MRU4, a total of four MRU patterns.

[0175] (3) Possible future bandwidth size:

[0176] In future WLAN standards, if a larger bandwidth appears, it is more likely to exist in the 6GHz frequency band. Because compared to the 2.4GHz and 5GHz frequency bands, 6GHz belongs to a new spectrum and has a larger bandwidth. In the 6GHz frequency band, there are four frequency bands: UNII-5, 6, 7, and 8. However, many countries only have the 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). Therefore, the possible future bandwidth forms defined in this application include but are not limited to 480MHz and 640MHz. For ease of description, the following embodiments mainly use 480MHz and 640MHz bandwidths as examples for illustration, which does not limit the technical solution of this application.

[0177] (4) Peak-to-average power ratio / PAPR:

[0178] Wireless signals have a constantly changing amplitude in the time domain, so their transmitted power is not constant. PAPR refers to the ratio of a signal's peak power to its average power over a period of time. Since an OFDM symbol is composed of multiple independently modulated subcarrier signals superimposed on each other, when the subcarriers have the same or similar phases, the superimposed signal is modulated by the same initial phase signal, resulting in a large instantaneous power peak and, in turn, a higher PAPR. Since typical power amplifiers have a limited dynamic range, MIMO-OFDM signals with large PAPRs are highly susceptible to entering the nonlinear region of the power amplifier, causing nonlinear distortion, significant spectrum spreading interference, and in-band signal distortion, severely degrading overall system performance.

[0179] (5) Long training field (LTF) sequence:

[0180] The LTF sequence can be used for channel estimation. Different bandwidths correspond to different LTF sequences.

[0181] Currently, there are 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; and unused subcarriers are neither data subcarriers nor pilot subcarriers. They include central direct current (DC) subcarriers, guard bands, and null subcarriers.

[0182] In a multi-stream scenario, in order to accurately estimate the spatial stream channel, the Wi-Fi standard proposes to maintain the orthogonality of the LTF sequences on each spatial stream by multiplying the LTF sequence on the data subcarrier using the P matrix.

[0183] Taking the number of spatial streams as 2 as an example, the corresponding P matrix is:

[0184] Taking the number of spatial streams as 4 as an example, the corresponding P matrix is:

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

[0186] Figure 3 is a schematic diagram of the construction of a multi-stream LTF sequence. As shown in Figure 3, 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 seen in the dotted box shown in Figure 3. The kth element LTFk of the LTF sequence is carried on the kth subcarrier, and the LTF of the nth OFDM symbol corresponding to the mth spatial stream is multiplied by the mth row and nth column element in the P matrix. Therefore, for the channel H k After that, the frequency domain signal Y received by the non-AP STA k It can be expressed as: Yk=HkP4*4LTF 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 multiple input multiple output (MIMO) channel corresponding to the k-th subcarrier can be estimated.

[0187] It should be understood that a RU / MRU includes data subcarriers and pilot subcarriers. The above-described LTF construction method applies only to data subcarriers. For pilot subcarriers, the corresponding LTF construction method is similar to that for data subcarriers, but the difference between the two is that the LTF construction method for pilot subcarriers uses the R matrix instead of the P matrix. The relationship between the R matrix and the P matrix is: R(m,n) = P(1,n), that is, each row of the R matrix is ​​equal to the first row of the P matrix. Therefore, the elements of the LTF sequence on the data subcarrier and the LTF sequence on the pilot subcarrier may be multiplied by different values, resulting in changes in the PAPR value of the designed LTF sequence. For details about the P matrix and the R matrix, please refer to the 802.11ac standard and are not detailed here.

[0188] Based on this, the present application provides a communication method and apparatus that designs LTF sequences for larger bandwidths (e.g., 640 MHz, 480 MHz, etc.). This LTF sequence not only has a low PAPR across the entire bandwidth, but also has a low PAPR across the RU / MRU. Furthermore, for multi-spatial stream transmission scenarios, this LTF sequence also has a low PAPR across multiple spatial streams, thereby ensuring system transmission performance.

[0189] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0190] 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 by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0191] 2) In this application, "at least one" means one or more, and "more" 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 previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items 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.

[0192] 3) Throughout this application, the terms "first," "second," and various numerical references are used for descriptive purposes only and are not intended to limit the scope of the embodiments of this application. For example, they are used to distinguish between different messages, rather than to describe a specific order or precedence. It should be understood that such references are interchangeable, where appropriate, to allow for the description of scenarios beyond the embodiments of this application.

[0193] 4) In this application, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes 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 such process, method, product or apparatus.

[0194] 5) In this application, "used to indicate" can include being used for direct indication and being used for indirect indication. When describing that a certain indication information is used to indicate A, it can include that the indication information directly indicates A or indirectly indicates A, and it does not mean that the indication information must carry A.

[0195] 6) In this application, "communication" may also be described as "data transmission", "information transmission", "data processing", etc. "Transmission" includes "sending" and "receiving".

[0196] 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 the scenario shown in FIG1 , but is not limited to this scenario.

[0197] 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 can 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.

[0198] Without loss of generality, the following describes in detail the communication method provided in the embodiments of the present application by taking the interaction between the transmitter and the receiver as an example. The transmitter involved in the embodiments 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.

[0199] FIG4 is a flow chart of a communication method 400 provided in an embodiment of the present application. As shown in FIG4 , the method includes the following steps.

[0200] S410: The transmitting end generates a PPDU.

[0201] The PPDU includes a first field, which is used to carry a first sequence, such as a UHR-LTF sequence. The first sequence is used by the receiving end for channel estimation. The first sequence corresponds to a first bandwidth greater than 320 MHz.

[0202] 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.

[0203] Optionally, the first sequence includes N subsequences, and any subsequence in the N subsequences is obtained based on 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 and the second base sequence is LTF80MHz_4x_right. The parameter corresponding to any subsequence can be ±1.

[0204] For example, the first base sequence may be a sequence corresponding to the left 40 MHz of 80 MHz (as shown below, LTF80MHz_4x_left), and the second base sequence may be a sequence corresponding to the right 40 MHz of 80 MHz (as shown below, LTF80MHz_4x_right). The first sequence corresponding to 640 MHz includes 16 subsequences, i.e., N=16, and the first sequence corresponding to 480 MHz includes 12 subsequences, i.e., N=12.

[0205] 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, by processing the base sequence, a longer LTF sequence, i.e., 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 symmetric 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 scenarios with multiple spatial streams transmitted, the PAPR of the first sequence in multiple spatial streams is also low, thereby ensuring system transmission performance. The symmetric splicing conditions of the combined sequence can be found in the detailed description below.

[0206] The following describes the LTF sequence of the 640 MHz PPDU and the LTF sequence of the 480 MHz PPDU.

[0207] (1) LTF sequence of 640MHz PPDU

[0208] 1.640MHz RU / MRU

[0209] For the 640MHz bandwidth, in addition to being compatible with the MRU modes defined in the 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), some other MRU modes will be introduced, including the following:

[0210] For example, an 8×996-tone MRU can be considered as four 2×996-tone RUs combined; or,

[0211] The 8×996-tone MRU can be viewed as the combination of two 4×996-tone RUs; or,

[0212] An 8×996-tone MRU can be considered as a 4×996-tone RU, or the combination of two 2×996-tone RUs.

[0213] It should be understood that the data subcarriers of an 8×996-tone MRU are composed of the combination of the data subcarriers of the multiple RUs that make up the 8×996-tone MRU, and the pilot subcarriers of an 8×996-tone MRU are composed of the pilot subcarriers of the multiple RUs that make up the 8×996-tone MRU. For example, if an 8×996-tone MRU is formed 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 the combination of the data subcarriers of the one 4×996-tone RU and the two 2×996-tone RUs, and the pilot subcarriers of the 8×996-tone MRU are composed of the combination of the pilot subcarriers of the one 4×996-tone RU and the two 2×996-tone RUs.

[0214] 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,

[0215] The 7×996-tone MRU can be viewed as the combination of three 2×996-tone RUs and one 996-tone RU; or,

[0216] 7×996-tone MRU can be considered as seven 996-tone RUs combined; or,

[0217] The 7×996-tone MRU can be considered as the combination of two 2×996-tone RUs and three 996-tone RUs.

[0218] It should be understood that the data subcarriers of a 7×996-tone MRU are composed of the combination of the data subcarriers of the multiple RUs that make up the 7×996-tone MRU, and the pilot subcarriers of a 7×996-tone MRU are composed of the pilot subcarriers of the multiple RUs that make up the 7×996-tone MRU. For example, if a 7×996-tone MRU is formed 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 the combination of the data subcarriers of the 4×996-tone RU, the 2×996-tone RU, and the 996-tone RU, and the pilot subcarriers of the 7×996-tone MRU are composed of the combination of the pilot subcarriers of the 4×996-tone RU, the 2×996-tone RU, and the 996-tone RU.

[0219] For ease of understanding, the following diagram illustrates an 8×996-tone MRU and a 7×996-tone MRU when the bandwidth is 640MHz, in conjunction with Figure 5(a). As can be seen from Figure 5(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, for a total of eight MRU patterns. Thus, the 8×996-tone RUs encompass the entire bandwidth, while the 7×996-tone MRU occupies part of the 640MHz bandwidth, leaving the remaining 996 subcarriers available for data transmission by one or more other users.

[0220] 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,

[0221] The 6×996-tone MRU can be viewed as the combination of three 2×996-tone RUs; or,

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

[0223] The 6×996-tone MRU can be considered as the combination of two 2×996-tone RUs and two 996-tone RUs.

[0224] It should be understood that the data subcarriers of a 6×996-tone MRU are composed of the combination of the data subcarriers of the multiple RUs that make up the 6×996-tone MRU, and the pilot subcarriers of a 6×996-tone MRU are composed of the pilot subcarriers of the multiple RUs that make up the 6×996-tone MRU. For example, if a 6×996-tone MRU is formed 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 the combination of the data subcarriers of the two 2×996-tone RUs and the two 996-tone RUs, and the pilot subcarriers of the 6×996-tone MRU are composed of the combination of the pilot subcarriers of the two 2×996-tone RUs and the two 996-tone RUs.

[0225] 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,

[0226] A 5×996-tone MRU can be considered as two 2×996-tone RUs and one 996-tone RU combined; or,

[0227] A 5×996-tone MRU can be viewed as the result of merging five 996-tone RUs.

[0228] It should be understood that the data subcarriers of a 5×996-tone MRU are composed of a combination of the data subcarriers of the multiple RUs that make up the 5×996-tone MRU, and the pilot subcarriers of a 5×996-tone MRU are composed of the pilot subcarriers of the multiple RUs that make up the 5×996-tone MRU. For example, if a 5×996-tone MRU is formed by combining two 2×996-tone RUs and one 996-tone RU, then the data subcarriers of the 5×996-tone MRU are composed of a combination of the data subcarriers of the two 2×996-tone RUs and one 996-tone RU. The pilot subcarriers of a 5×996-tone MRU are composed of a combination of the pilot subcarriers of the two 2×996-tone RUs and one 996-tone RU.

[0229] For ease of understanding, the following diagram illustrates a 6×996-tone MRU and a 5×996-tone MRU for a 640 MHz bandwidth, with reference to Figure 5(b). As shown in Figure 5(b), the 6×996-tone MRU pattern includes four MRU patterns: 6×996-tone MRU 1, 6×996-tone MRU 2, 6×996-tone MRU 3, and 6×996-tone MRU 4. The 5×996-tone MRU pattern includes 12 MRU patterns: 5×996-tone MRU 1, ..., 5×996-tone MRU 12.

[0230] For example, a 4×996-tone MRU can be considered as two 2×996-tone RUs combined; or,

[0231] A 4×996-tone MRU can be viewed as a 2×996-tone RU, or as the result of combining two 996-tone RUs.

[0232] It should be understood that the data subcarriers of a 4×996-tone MRU are composed of the combination of the data subcarriers of the multiple RUs that make up the 4×996-tone MRU, and the pilot subcarriers of a 4×996-tone MRU are composed of the pilot subcarriers of the multiple RUs that make up the 4×996-tone MRU. For example, if a 4×996-tone MRU is formed 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 the combination of the data subcarriers of the 2×996-tone RU and the two 996-tone RUs, and the pilot subcarriers of the 4×996-tone MRU are composed of the combination of the pilot subcarriers of the 2×996-tone RU and the two 996-tone RUs.

[0233] For example, a 3×996-tone MRU can be considered as a combination of a 2×996-tone RU and a 996-tone RU.

[0234] It should be understood that the data subcarriers of a 3×996-tone MRU are composed of the combination of the data subcarriers of the multiple RUs that make up the 3×996-tone MRU, and the pilot subcarriers of a 3×996-tone MRU are composed of the pilot subcarriers of the multiple RUs that make up the 3×996-tone MRU. For example, if a 3×996-tone MRU is formed 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 the combination of the data subcarriers of the 2×996-tone RU and the 996-tone RU, and the pilot subcarriers of the 3×996-tone MRU are composed of the combination of the pilot subcarriers of the 2×996-tone RU and the 996-tone RU.

[0235] For ease of understanding, the following diagram illustrates a 4×996-tone MRU and a 3×996-tone MRU for a 640 MHz bandwidth, with reference to Figure 5(c). As shown in Figure 5(c), the 4×996-tone MRU pattern includes two MRU patterns: 4×996-tone MRU 1 and 4×996-tone MRU 2. The 3×996-tone MRU pattern includes eight MRU patterns: 3×996-tone MRU 1, ..., and 3×996-tone MRU 8.

[0236] For example, a 2×996-tone MRU can be considered as a combination of two 996-tone RUs.

[0237] It should be understood that the data subcarriers of a 2×996-tone MRU are composed of the combination of the data subcarriers of the multiple RUs that make up the 2×996-tone MRU, and the pilot subcarriers of the 2×996-tone MRU are composed of the pilot subcarriers of the multiple RUs that make up the 2×996-tone MRU. For example, if a 2×996-tone MRU is formed by combining two 996-tone RUs, then the data subcarriers of the 2×996-tone MRU are composed of the combination of the data subcarriers of the two 996-tone RUs, and the pilot subcarriers of the 2×996-tone MRU are composed of the combination of the pilot subcarriers of the two 996-tone RUs.

[0238] For ease of understanding, the following diagram illustrates a 2×996-tone MRU for a 640 MHz bandwidth, using Figure 5(d). As shown in Figure 5(d), the 2×996-tone MRU patterns include 2×996-tone MRU 1, ..., and 2×996-tone MRU 4, for a total of four MRU patterns.

[0239] 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

[0240] The 7×996+484-tone MRU can be viewed as the combination of three 2×996-tone RUs, one 996-tone RU, and one 484-tone RU; or,

[0241] 7×996+484-tone MRU can be viewed as seven 996-tone RUs combined with one 484-tone RU; or,

[0242] 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.

[0243] 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 the 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 the 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.

[0244] For ease of understanding, the following diagram illustrates a 7×996+484-tone MRU for a 640MHz bandwidth, with reference to Figure 5(e). As shown in Figure 5(e), the 7×996-tone MRU pattern includes 16 different MRU patterns: 7×996+484-tone MRU 1, ..., and 7×996+484-tone MRU 16.

[0245] 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

[0246] 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,

[0247] The 5×996+484-tone MRU can be viewed as the combination of five 996-tone RUs and one 484-tone RU.

[0248] It should be understood that the data subcarriers of a 5×996+484-tone MRU are composed of the combination of the data subcarriers of the multiple RUs that make up the 5×996+484-tone MRU, and the pilot subcarriers of the 5×996+484-tone MRU are composed of the pilot subcarriers of the multiple RUs that make up the 5×996+484-tone MRU. For example, if a 5×996+484-tone MRU is formed 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 the combination of the 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 the combination of the pilot subcarriers of the two 2×996-tone RUs, one 996-tone RU, and one 484-tone RU.

[0249] For ease of understanding, the following diagram illustrates a 5×996+484-tone MRU for a 640 MHz bandwidth, with reference to Figure 5(f). As shown in Figure 5(f), the 5×996+484-tone MRU patterns include 5×996+484-tone MRU 1, ..., and 5×996+484-tone MRU 24, for a total of 24 MRU patterns.

[0250] 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.

[0251] It should be understood that the data subcarriers of a 3×996+484-tone MRU are composed of the combination of the data subcarriers of the multiple RUs that make up the 3×996+484-tone MRU, and the pilot subcarriers of the 3×996+484-tone MRU are composed of the pilot subcarriers of the multiple RUs that make up the 3×996+484-tone MRU. For example, if a 3×996+484-tone MRU is formed 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 the combination of the data subcarriers of the 2×996-tone RU, the 996-tone RU, and the 484-tone RU, and the pilot subcarriers of the 3×996+484-tone MRU are composed of the combination of the pilot subcarriers of the 2×996-tone RU, the 996-tone RU, and the 484-tone RU.

[0252] For ease of understanding, the following diagram illustrates a 4×996-tone MRU and a 3×996+484-tone MRU for a 640 MHz bandwidth, with reference to Figure 5(g). As shown in Figure 5(g), the 4×996-tone MRU includes the 4×996-tone MRU pattern 1, and the 3×996+484-tone MRU patterns include 3×996+484-tone MRU 1, ..., and 3×996+484-tone MRU 16, for a total of 16 MRU patterns.

[0253] For example, a 2×996+484-tone MRU can be considered as a combination of two 996-tone RUs and one 484-tone RU.

[0254] It should be understood that the data subcarriers of a 2×996+484-tone MRU are composed of the combination of the data subcarriers of the multiple RUs that make up the 2×996+484-tone MRU, and the pilot subcarriers of the 2×996+484-tone MRU are composed of the pilot subcarriers of the multiple RUs that make up the 996+484-tone MRU. For example, if a 2×996+484-tone MRU is formed 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 the combination of the 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 the combination of the pilot subcarriers of the two 996-tone RUs and one 484-tone RU.

[0255] For ease of understanding, the following diagram illustrates a 2×996+484-tone MRU for a 640 MHz bandwidth, with reference to Figure 5(h). As shown in Figure 5(h), the 2×996+484-tone MRU patterns include 2×996+484-tone MRU 1, ..., and 2×996+484-tone MRU 24, for a total of 24 MRU patterns.

[0256] For example, a 996+484-tone MRU can be considered as a combination of a 996-tone RU and a 484-tone RU.

[0257] It should be understood that the data subcarriers of a 996+484-tone MRU are composed of the combination of the data subcarriers of the multiple RUs that make up the 996+484-tone MRU, and the pilot subcarriers of the 996+484-tone MRU are composed of the pilot subcarriers of the multiple RUs that make up the 996+484-tone MRU. For example, if a 996+484-tone MRU is formed by combining a 996-tone RU and a 484-tone RU, then the data subcarriers of the 996+484-tone MRU are composed of the combination of the data subcarriers of the 996-tone RU and the 484-tone RU, and the pilot subcarriers of the 996+484-tone MRU are composed of the combination of the pilot subcarriers of the 996-tone RU and the 484-tone RU.

[0258] For ease of understanding, the following diagram illustrates a 996+484-tone MRU for a 640MHz bandwidth, with reference to Figure 5(i). As shown in Figure 5(i), the 996+484-tone MRU patterns include 996+484-tone MRU 1, ..., and 996+484-tone MRU 16, for a total of 16 MRU patterns.

[0259] It should be understood that the above details the MRU pattern of 640 MHz. This embodiment does not limit how to obtain the above MRU pattern. The above merging method is only an example and does not constitute any limitation on the scope of protection of this application.

[0260] LTF sequence of 2.640MHz PPDU

[0261] The following constructs a 640 MHz LTF sequence for the RU / MRU described above, using LTF80MHz_4x_left and LTF80MHz_4x_right as base sequences. This LTF sequence not only achieves low PAPR across the entire 640 MHz bandwidth, but also across the 640 MHz RU / MRU. Furthermore, for multi-spatial stream transmission scenarios, this LTF sequence maintains low PAPR across all spatial streams, thereby ensuring user transmission performance.

[0262] 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]；,

[0263] 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]。,

[0264] Then the LTF sequence of the 640MHz PPDU is as follows:

[0265] 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):

[0266] (1)[c1,…,c 16 ]=±[1,-1,1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,1];

[0267] (2)[c1,…,c 16 ]=±[1,1,1,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,1,1,-1,1];

[0268] (3)[c1,…,c 16 ]=±[1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,1,1,-1];

[0269] (4)[c1,…,c 16 ]=±[-1,1,1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1,-1,1];

[0270] (5)[c1,…,c 16 ]=±[1,1,-1,1,-1,-1,-1,1,-1,1,-1,1,1,-1,1,1,-1];

[0271] (6)[c1,…,c 16 ]=±[-1,1,1,1,-1,1,1,-1,1,-1,-1,-1,-1,1,-1,1,1];

[0272] (7)[c1,…,c 16 ]=±[1,1,-1,1,-1,-1,-1,1,-1,-1,-1,-1,-1,-1,-1,-1];

[0273] (8)[c1,…,c 16 ]=±[-1,-1,1,-1,-1,1,-1,1,-1,-1,-1,-1,-1,1,-1,1];

[0274] (9)[c1,…,c 16 ]=±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1,1,1,-1,1];

[0275] (10)[c1,…,c 16 ]=±[1,-1,1,1,1,1,1,-1,-1,-1,-1,-1,1,1,1,-1,1];

[0276] (11)[c1,…,c 16 ]=±[1,-1,1,-1,-1,-1,-1,1,1,1,-1,-1,-1,-1,-1];

[0277] (12)[c1,…,c 16 ]=±[-1,-1,-1,-1,1,1,1,-1,-1,-1,-1,-1,-1,1,-1,1];

[0278] (13)[c1,…,c 16 ]=±[1,-1,-1,-1,-1,1,1,-1,1,1,1,-1,1,-1,-1,-1];

[0279] (14)[c1,…,c 16 ]=±[-1,-1,1,-1,1,1,1,-1,1,1,-1,-1,-1,-1,-1,-1,1];

[0280] (15)[c1,…,c 16 ]=±[1,-1,1,-1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,1,-1];

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

[0282] 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., 640MHz), the LTF sequence not only has a low PAPR over the entire bandwidth, but also has a low PAPR over RU / MRU. For multi-spatial stream transmission scenarios, the LTF sequence has a low PAPR over multiple spatial streams, thereby ensuring system transmission performance. In addition, considering each element c i The value of can be 1 or -1, then 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, it is necessary to conduct a lot of calculations and simulations 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 ] satisfies the symmetrical splicing conditions of the combined sequence, can overcome the above difficulties, reduce large computational simulations, reduce computational difficulty and complexity, and can determine the LTF sequence of the above-provided 640MHz PPDU more quickly and accurately.

[0283] Next, for the parameters [c1, c2, c3, ..., c 16 ] is used to illustrate the design method.

[0284] For example, for a real frequency domain sequence X(k), its corresponding time domain signal x(n) satisfies:

[0285] According to the above formula (1), the real part of the corresponding time domain signal x(n) is even symmetric (i.e., real(x(n)) = real(x(-n))), and the imaginary part is odd symmetric (i.e., image(x(n)) = -image(x(-n))). When the frequency domain sequence X(k) is even symmetric (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 symmetric (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 approximates the time-domain signals corresponding to the two half-length sequences. Therefore, although the combined sequence is longer, its PAPR is approximately equal to that of a half-length sequence, resulting in 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], the combined sequence can be [-b2, a2, -b1, a1, a1, b1, a2, b2] or [a2, -b2, a1, -b1, b1, a1, b2, a2].

[0286] According to the above principles, when designing parameters [c1, c2, c3, ..., c 16], the corresponding parameters ci of each symmetrical 160M bandwidth can satisfy the symmetrical splicing conditions of the above-mentioned combined sequence. 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 combined sequences are met, that is, one or more of the following are met:

[0287] [c9,c 10 ,c 11 ,c 12 ]=±[-c8,c7,-c6,c5] (2)

[0288] [c 13 ,c 14 ,c 15 ,c 16 ]=±[-c4,c3,-c2,c1] (3)

[0289] [c1,c2,c3,c4]=±[-c8,c7,-c6,c5] (4)

[0290] [c9,c 10 ,c 11 ,c 12 ]=±[-c 16 ,c 15 ,-c 14 ,c 13 ] (5)

[0291] That is, the above parameters (1) to (16) satisfy one or more of the above formulas (2) to (5).

[0292] In the first implementation, the above parameters (1) and (2) simultaneously satisfy formulas (2) to (5). Based on the parameters (1) and (2) and the RU / MRU shown in FIG5 , the PAPR results of the 640MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees) can be obtained. 0 degrees can indicate that the relative phase rotation angle between the pilot subcarrier and the data subcarrier corresponding to the LTF sequence is 0 degrees, 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 0 degrees, that is, the ratio of a certain element of the R matrix to the corresponding element in the P matrix is ​​1; The relative phase rotation angle between the pilot subcarriers and the data subcarriers 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; 60 degrees can indicate that the relative phase rotation angle between the pilot subcarriers and the data subcarriers 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 subcarriers and the data subcarriers 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), where n is an arbitrary integer and w=exp(j*pi / 3).

[0293] 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 at different pilot phase rotation angles correspond to the RU / MRU patterns shown in Figure 5, as shown in Table 1 below:

[0294] Table 1

[0295] 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 RU / MRU shown in FIG5 , the PAPR results of the 640 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees, and 120 degrees) can be obtained, where the PAPR results of the RU / MRU at different phase rotation angles correspond one-to-one to the RU / MRU patterns shown in FIG5 , as shown in Table 2 below:

[0296] Table 2

[0297] In the third implementation, the above parameters (5) and (6) satisfy the above formulas (3) and (4) at the same time. Based on the parameters (5) and (6) and the RU / MRU shown in FIG5 , the PAPR results of the 640MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees) can be obtained, where the PAPR results of the RU / MRU at different phase rotation angles correspond one-to-one to the RU / MRU patterns shown in FIG5 , as shown in Table 3 below:

[0298] Table 3

[0299] 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 RU / MRU shown in FIG5 , the PAPR results of the 640 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees, and 120 degrees) can be obtained, where the PAPR results of the RU / MRU at different phase rotation angles correspond one-to-one to the RU / MRU patterns shown in FIG5 , as shown in Table 4 below:

[0300] Table 4

[0301] 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 RU / MRU shown in FIG5 , the PAPR results of the 640 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees, and 120 degrees) can be obtained. The PAPR results of the RU / MRU at different phase rotation angles correspond to the RU / MRU patterns shown in FIG5 , as shown in Table 5 below:

[0302] Table 5

[0303] 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 RU / MRU shown in FIG5 , the PAPR results of the 640 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees, and 120 degrees) can be obtained. The PAPR results of the RU / MRU at different phase rotation angles correspond to the RU / MRU patterns shown in FIG5 , as shown in Table 6 below:

[0304] Table 6

[0305] 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 RU / MRU shown in FIG5 , the PAPR results of the 640 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees, and 120 degrees) can be obtained, where the PAPR results of the RU / MRU at different phase rotation angles correspond one-to-one to the RU / MRU patterns shown in FIG5 , as shown in Table 7 below:

[0306] Table 7

[0307] 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 RU / MRU shown in FIG5 , the PAPR results of the 640 MHz RU / MRU at different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees, and 120 degrees) can be obtained, where the PAPR results of the RU / MRU at different phase rotation angles correspond one-to-one to the RU / MRU patterns shown in FIG5 , as shown in Table 8 below:

[0308] Table 8

[0309] The above description is mainly based on the 640MHz PPDU as an example. It should be understood that the RU / MRU pattern and LTF sequence corresponding to the 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 the MRU and LTF sequence for the 480MHz PPDU. The following is a specific description of the RU / MRU pattern and LTF sequence under the 480MHz PPDU.

[0310] (2) LTF sequence of 480MHz PPDU.

[0311] 1.480MHz RU / MRU

[0312] For the 480MHz bandwidth, the RU / MRU pattern 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.

[0313] 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,

[0314] 6×996-tone RU can be considered as three 2×996-tone RUs combined; or,

[0315] 6×996-tone RU can be considered as the combination of six 996-tone RUs; or,

[0316] 6×996-tone RU can be regarded as the combination of two 2×996-tone RU and two 996-tone RU.

[0317] 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

[0318] 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,

[0319] The 5×996+484-tone MRU can be viewed as the combination of five 996-tone RUs and one 484-tone RU.

[0320] As shown in (a) of Figure 6, a schematic diagram of a 6×996-tone MRU and a 5×996+484-tone MRU with a bandwidth of 480 MHz is shown. The 6×996-tone MRU includes 6×996-tone MRU 1. The 5×996+484-tone MRU pattern includes 5×996+484-tone MRU 1, ..., 5×996+484-tone MRU 12.

[0321] 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,

[0322] A 5×996-tone MRU can be considered as two 2×996-tone RUs and one 996-tone RU combined; or,

[0323] A 5×996-tone MRU can be viewed as the result of merging five 996-tone RUs.

[0324] As shown in (b) of FIG6 , which is a schematic diagram of a 5×996-tone MRU with a bandwidth of 480 MHz, the 5×996-tone MRU pattern includes 5×996-tone MRU 1, …, 5×996-tone MRU 6.

[0325] For example, a 4×996-tone MRU can be considered as two 2×996-tone RUs combined; or,

[0326] A 4×996-tone MRU can be viewed as a 2×996-tone RU, or as the result of combining two 996-tone RUs.

[0327] As shown in (c) of FIG6 , a schematic diagram of a 4×996-tone MRU with a bandwidth of 480 MHz is shown. The 4×996-tone MRU patterns include 4×996-tone MRU 1 and 4×996-tone MRU 2.

[0328] For example, a 3×996-tone MRU can be considered as a combination of a 2×996-tone RU and a 996-tone RU.

[0329] As shown in (d) of FIG6 , which is a schematic diagram of a 3×996-tone MRU with a bandwidth of 480 MHz, the 3×996-tone MRU pattern includes 3×996-tone MRU 1, …, 3×996-tone MRU 7.

[0330] For example, a 2×996-tone MRU can be considered as a combination of two 996-tone RUs.

[0331] As shown in (e) of FIG6 , which is a schematic diagram of a 2×996-tone MRU with a bandwidth of 480 MHz, the 2×996-tone MRU pattern includes 2×996-tone MRU 1, …, 2×996-tone MRU 3.

[0332] 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.

[0333] As shown in (f) of FIG6 , which is a schematic diagram of a 3×996+484-tone MRU with a bandwidth of 480 MHz, the 3×996+484-tone MRU patterns include 3×996+484-tone MRU 1, …, 3×996+484-tone MRU 16.

[0334] For example, a 2×996+484-tone MRU can be considered as a combination of two 996-tone RUs and one 484-tone RU.

[0335] As shown in (g) of FIG6 , which is a schematic diagram of a 2×996+484-tone MRU with a bandwidth of 480 MHz, the 2×996+484-tone MRU patterns include 2×996+484-tone MRU 1, …, 2×996+484-tone MRU 6.

[0336] For example, a 996+484-tone MRU can be considered as a combination of a 996-tone RU and a 484-tone RU.

[0337] As shown in (h) of FIG6 , which is a schematic diagram of a 996+484-tone MRU with a bandwidth of 480 MHz, the 996+484-tone MRU patterns include 996+484-tone MRU 1, …, 996+484-tone MRU 12.

[0338] It should be understood that the above details the MRU pattern in the case of 480MHz PPDU. This embodiment does not limit how to obtain the above MRU pattern. The above merging method is only an example and does not constitute any limitation on the scope of protection of this application.

[0339] LTF sequence of 2.480MHz PPDU

[0340] For example, a 480 MHz LTF sequence satisfies:

[0341] UHRLTF 3060,3060 ={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,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.

[0342] Among them, the parameters [c1,…,c 12 ] can be any one of the following (1) to (32):

[0343] (1)[c1,…,c 12 ]=±[1,-1,1,1,1,-1,-1,-1,-1,-1,-1,-1];

[0344] (2)[c1,…,c 12 ]=±[-1,-1,1,-1,-1,-1,-1,1,1,1,-1,1];

[0345] (3)[c1,…,c 12 ]=±[1,1,-1,1,-1,-1,-1,-1,-1,-1,-1,1];

[0346] (4)[c1,…,c 12]=±[-1,1,-1,-1,1,-1,-1,-1,1,-1,1,1];

[0347] (5)[c1,…,c 12 ]=±[1,1,-1,1,-1,-1,-1,1,-1,1,1,-1];

[0348] (6)[c1,…,c 12 ]=±[-1,1,1,-1,1,-1,-1,-1,1,-1,1,1];

[0349] (7)[c1,…,c 12 ]=±[1,1,-1,1,-1,-1,-1,1,1,-1,1,-1];

[0350] (8)[c1,…,c 12 ]=±[-1,1,-1,1,1,-1,-1,-1,1,-1,1,1];

[0351] (9)[c1,…,c 12 ]=±[1,-1,1,1,1,-1,-1,-1,-1,1,1,1];

[0352] (10)[c1,…,c 12 ]=±[1,1,1,-1,-1,-1,-1,1,1,1,-1,1];

[0353] (11)[c1,…,c 12 ]=±[1,-1,1,-1,-1,1,-1,-1,1,1,1,1];

[0354] (12)[c1,…,c 12 ]=±[1,1,1,1,-1,-1,1,-1,-1,1,-1,1];

[0355] (13)[c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,1,-1,1,1,1,1];

[0356] (14)[c1,…,c 12 ]=±[1,1,1,1,-1,1,1,-1,-1,-1,-1,1];

[0357] (15)[c1,…,c 12 ]=±[1,-1,1,-1,-1,-1,-1,-1,1,1,-1,1];

[0358] (16)[c1,…,c12 ]=±[1,-1,1,1,-1,-1,-1,-1,-1,1,-1,1];

[0359] (17)[c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,-1,-1,-1,1,1,1];

[0360] (18)[c1,…,c 12 ]=±[1,1,1,-1,-1,-1,1,-1,-1,-1,-1,1];

[0361] (19)[c1,…,c 12 ]=±[-1,-1,-1,1,-1,-1,1,-1,1,1,1,-1];

[0362] (20)[c1,…,c 12 ]=±[-1,1,1,1,-1,1,-1,-1,1,-1,-1,-1];

[0363] (21)[c1,…,c 12 ]=±[-1,-1,-1,1,-1,1,1,-1,1,1,1,-1];

[0364] (22)[c1,…,c 12 ]=±[-1,1,1,1,-1,1,1,-1,1,-1,-1,-1];

[0365] (23)[c1,…,c 12 ]=±[-1,-1,-1,1,1,-1,1,-1,-1,1,-1,-1];

[0366] (24)[c1,…,c 12 ]=±[-1,-1,1,-1,-1,1,-1,1,1,-1,-1,-1];

[0367] (25)[c1,…,c 12 ]=±[1,-1,-1,-1,-1,1,1,1,1,1,-1,1];

[0368] (26)[c1,…,c 12 ]=±[1,-1,1,1,1,1,1,-1,-1,-1,-1,1];

[0369] (27)[c1,…,c 12 ]=±[-1,1,-1,-1,1,1,1,1,-1,-1,-1,-1];

[0370] (28)[c1,…,c 12 ]=±[-1,-1,-1,-1,1,1,1,-1,-1,-1,1,-1];

[0371] (29)[c1,…,c 12 ]=±[-1,1,1,-1,1,1,1,-1,1,-1,-1];

[0372] (30)[c1,…,c 12 ]=±[-1,-1,1,-1,1,1,1,-1,1,1,-1];

[0373] (31)[c1,…,c 12 ]=±[-1,-1,-1,-1,1,1,-1,1,-1,1,1,-1];

[0374] (32)[c1,…,c 12 ]=±[-1,1,1,-1,1,-1,1,-1,-1,-1,-1,-1].

[0375] 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).

[0376] In summary, by designing an LTF sequence corresponding to a bandwidth greater than 320MHz to support signal transmission in future large bandwidth scenarios (such as 480MHz), the LTF sequence not only has a lower PAPR over the entire bandwidth, but also has a lower PAPR on RU / MRU. In 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. In addition, considering that the value of each element ci can be 1 or -1, for the LTF sequence of 480MHz PPDU, 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 for 480MHz, it is necessary to conduct a lot of calculations and simulations 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-mentioned 480MHz PPDU more quickly and accurately.

[0377] 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 RU / MRU shown in Figure 6, the PAPR results of the 480MHZ RU / MRU under different pilot phase rotation angles (such as 0 degrees, 180 degrees, 60 degrees and 120 degrees) can be obtained. 0 degrees can indicate that the relative phase rotation angle between the pilot subcarrier corresponding to the LTF sequence and the data subcarrier is 0 degrees, 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 corresponding to the LTF sequence and the data subcarrier is 18 0 degrees, that is, the ratio of a certain element of the R matrix to the corresponding element in the P matrix is ​​-1; 60 degrees can indicate that the relative phase rotation angle between the pilot subcarrier corresponding to the LTF sequence and the data subcarrier 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 corresponding to the LTF sequence and the data subcarrier 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), where n is an arbitrary integer and w=exp(j*pi / 3). Among them, the PAPR results of RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in Figure 6, as shown in Table 9 below:

[0378] Table 9

[0379] In the second implementation, the above parameters (3) and (4) are based on the LTF sequence corresponding to the above Table 2. The LTF sequence corresponding to the first 480 MHz is intercepted and used as the LTF sequence of the 480 MHz PPDU. Based on the parameter (3) or (4) and the RU / MRU shown in FIG6 , 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 , as shown in Table 10 below:

[0380] Table 10

[0381] In the third implementation, the above parameters (5) and (6) are based on the LTF sequence corresponding to the above Table 3. The LTF sequence corresponding to the first 480 MHz is intercepted and used as the LTF sequence of the 480 MHz PPDU. Based on the parameter (5) or (6) and the RU / MRU shown in FIG6 , 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 , as shown in Table 11 below:

[0382] Table 11

[0383] In the fourth implementation, the above parameters (7) and (8) are based on the LTF sequence corresponding to the above Table 4. The LTF sequence corresponding to the first 480 MHz is intercepted and used as the LTF sequence of the 480 MHz PPDU. Based on the parameter (7) or (8) and the RU / MRU shown in FIG6 , 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 , as shown in Table 12 below:

[0384] Table 12

[0385] In the fifth implementation, the above parameters (9) and (10) are based on the LTF sequence corresponding to the above Table 5. The LTF sequence corresponding to the first 480 MHz is intercepted and used as the LTF sequence of the 480 MHz PPDU. Based on the parameters (9) or (10) and the RU / MRU shown in FIG6 , 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 , as shown in Table 13 below:

[0386] Table 13

[0387] In the sixth implementation, the above parameters (11) and (12) are based on the LTF sequence corresponding to the above Table 6. The LTF sequence corresponding to the first 480 MHz is intercepted and used as the LTF sequence of the 480 MHz PPDU. Based on the parameters (11) or (12) and the RU / MRU shown in FIG6 , 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 , as shown in Table 14 below:

[0388] Table 14

[0389] In the seventh implementation, the above parameters (13) and (14) are based on the LTF sequence corresponding to the above Table 7. The LTF sequence corresponding to the first 480 MHz is intercepted and used as the LTF sequence of the 480 MHz PPDU. Based on the parameters (13) or (14) and the RU / MRU shown in FIG6 , 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 , as shown in Table 15 below:

[0390] Table 15

[0391] In the 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 RU / MRU shown in FIG6 , 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 , as shown in Table 16 below:

[0392] Table 16

[0393] In the ninth implementation, the parameters (17) and (18) are based on the LTF sequence corresponding to Table 1 above, and the LTF sequence corresponding to 480 MHz is truncated and used as the LTF sequence of the 480 MHz PPDU. Based on the parameters (17) or (18) and the RU / MRU shown in FIG6 above, 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 one by one, as shown in Table 17 below:

[0394] Table 17

[0395] In the tenth implementation, the parameters (19) and (20) are based on the LTF sequence corresponding to Table 2 above, and the LTF sequence corresponding to 480 MHz is truncated and used as the LTF sequence of the 480 MHz PPDU. Based on the parameters (19) or (20) and the RU / MRU shown in FIG6 above, 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 one by one, as shown in Table 18 below:

[0396] Table 18

[0397] In the eleventh implementation, the parameters (21) and (22) are based on the LTF sequence corresponding to Table 3 above, and the LTF sequence corresponding to 480 MHz is truncated and used as the LTF sequence of the 480 MHz PPDU. Based on the parameters (21) or (22) and the RU / MRU shown in FIG6 above, 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 one by one, as shown in Table 19 below:

[0398] Table 19

[0399] In the twelfth implementation, the parameters (23) and (24) are based on the LTF sequence corresponding to Table 4 above, and the LTF sequence corresponding to 480 MHz is truncated and used as the LTF sequence of the 480 MHz PPDU. Based on the parameters (23) or (24) and the RU / MRU shown in FIG6 above, 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 one by one, as shown in Table 20 below:

[0400] Table 20

[0401] In the thirteenth implementation, the parameters (25) and (26) are based on the LTF sequence corresponding to Table 5 above, and the LTF sequence corresponding to 480 MHz is truncated as the LTF sequence of the 480 MHz PPDU. Based on the parameters (25) or (26) and the RU / MRU shown in FIG6 above, 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 one by one, as shown in Table 21 below:

[0402] Table 21

[0403] In the fourteenth implementation, the parameters (27) and (28) are based on the LTF sequence corresponding to Table 6 above, and the LTF sequence corresponding to 480 MHz is truncated and used as the LTF sequence of the 480 MHz PPDU. Based on the parameters (27) or (28) and the RU / MRU shown in FIG6 above, 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 one by one, as shown in Table 22 below:

[0404] Table 22

[0405] In the fifteenth implementation, the parameters (29) and (30) are based on the LTF sequence corresponding to Table 7 above, 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 RU / MRU shown in FIG6 above, 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 one by one, as shown in Table 23 below:

[0406] Table 23

[0407] In the sixteenth implementation, the above parameters (31) and (32) are based on the LTF sequence corresponding to the above Table 8, and the LTF sequence corresponding to 480 MHz is truncated as the LTF sequence of the 480 MHz PPDU. Based on the parameter (31) or (32) and the RU / MRU shown in FIG6 , 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) can be obtained. The PAPR results of the RU / MRU at different pilot phase rotation angles correspond to the RU / MRU patterns shown in FIG6 , as shown in Table 24 below:

[0408] Table 24

[0409] 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 bandwidth size may be 2×480MHz in the future. The design of the MRU pattern and LTF sequence corresponding to the 2×480MHz bandwidth can refer to the above implementation method, and no further examples are given here.

[0410] S420, the transmitting end sends the PPDU to the receiving end, and correspondingly, the receiving end receives the PPDU from the transmitting end.

[0411] For example, in 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. This embodiment does not limit the PPDU transmission method. For example, the description of the PPDU transmission method between the AP and the STA specified in existing or future protocols may be referred to, and will not be repeated here.

[0412] 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 resource.

[0413] 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.

[0414] 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.

[0415] It should be noted that, for ease of description, the communicating parties in this embodiment are referred to as AP and STA. However, 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, and STA can be replaced by non-AP station, non-AP STA, user, terminal device, etc., and the examples are not given here one by one.

[0416] S430: The receiving end performs channel estimation according to the first sequence passing through the wireless channel and a preset first sequence.

[0417] It should be understood that the preset first sequence is the first sequence in step S410. After parsing the received PPDU, the receiving end obtains the first sequence transmitted through the wireless channel and compares it with the preset first sequence to complete channel estimation. The specific implementation of channel estimation can be referenced to existing solutions and is not described here.

[0418] Based on the above technical solution, by designing low-PAPR LTF sequences suitable for larger bandwidths (such as 640 MHz or 480 MHz), we can ensure low PAPR across the entire bandwidth and also ensure low PAPR for the RU / MRU. In addition, in scenarios where multiple spatial streams are transmitted, the PAPR of multiple spatial streams is low, which can improve signal transmission quality and enhance user communication performance.

[0419] It should be understood that the size of the serial numbers of the above processes does 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.

[0420] 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 by each other, and the technical features in different embodiments can be combined to form new embodiments according to their internal logical relationships.

[0421] It should also be understood that in some of the above embodiments, devices in existing network architectures are mainly used as examples for illustrative purposes, 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 functions in the future are applicable to the embodiments of the present application.

[0422] It is understandable that in the above-mentioned various method embodiments, the methods and operations implemented by devices (such as APs and STAs) may also be implemented by components (such as chips or circuits) that can be used in the devices.

[0423] 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 explanation, and the present application is not limited to this. The AP can be replaced by a sending device, and the sending device can be a network device or a terminal device; the STA can be replaced by a receiving device, and the receiving device can be a network device or a terminal device.

[0424] It can also be understood that some optional features in the various embodiments of the present application may not depend on other features in certain scenarios, and may also be combined with other features in certain scenarios, without limitation.

[0425] The above describes the method embodiment of the present application, 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 parts not described in detail can be referred to the above method embodiment.

[0426] Figure 7 is a schematic diagram of a communication device provided in an embodiment of the present application. As shown in Figure 7, communication device 1000 may include a transceiver unit 1010 and / or a processing unit 1020. Transceiver unit 1010 can communicate with the outside world, and processing unit 1020 is used to process data / information. Transceiver unit 1010 may also be referred to as a communication interface or a communication unit.

[0427] In one 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 that performed by the transmitting end in the above method 700, wherein the processing unit 1020 is configured to perform processing-related operations of the transmitting end in the above method 700, and the transceiver unit 1010 is configured to perform transceiver-related operations of the transmitting end in the above method 700.

[0428] 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.

[0429] 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.

[0430] 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.

[0431] Optionally, in this implementation, the communication device 1000 may further include a processing unit 1020, and the processing unit 1020 is used to perform operations related to the processing of the receiving end in the above method embodiment 200.

[0432] 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 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 processing unit 1020 is used to perform channel estimation based on the first sequence passing through the wireless channel and a preset first sequence.

[0433] 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.

[0434] In another possible implementation, the communication device 1000 can implement the steps, actions, or methods related to the transmitting end in the above-mentioned method 700, or implement the steps, actions, or methods related to the receiving end in the above-mentioned method 700. The details of the communication device 1000 executing the above-mentioned method 700 have been described in detail in the above-mentioned method embodiment and are not repeated here for the sake of brevity.

[0435] 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 memory for executing one or more software or firmware programs, combined logic circuits, and / or other suitable components that support the described functionality.

[0436] 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 the corresponding software can be implemented by hardware. 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 transmitting 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.

[0437] In addition, the above-mentioned transceiver unit can also be a transceiver circuit (for example, it can include a receiving circuit and a transmitting circuit), and the processing unit can be a processing circuit. In an embodiment of the present application, the communication device 1000 can be the transmitting end or the receiving end in the aforementioned embodiment, or it can be a chip or a chip system, such as a system on chip (SoC). Among them, the transceiver unit can be an input and output circuit, a communication interface, and the processing unit can be a processor or microprocessor or integrated circuit integrated on the chip. This is not limited here.

[0438] Figure 8 is another schematic structural diagram of a communication device provided in an embodiment of the present application. As shown in Figure 8, the communication device 2000 includes: at least one processor 2010 and at least one transceiver 2020. The processor 2010 is coupled to a memory and is configured to execute instructions stored in the memory to control the transceiver 2020 to transmit and / or receive signals. Optionally, the communication device 2000 also includes a memory 2030 for storing instructions.

[0439] 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.

[0440] In another example, the transceiver 2020 is used to receive a PPDU, which 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.

[0441] It should be understood that the above content is only for illustrative purposes. The communication device 2000 can also implement the sending end, receiving end, or other steps, actions or methods related to the sending end and receiving end in the above method 700. For the sake of brevity, they will not be repeated here.

[0442] 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.

[0443] 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.

[0444] The processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or may be 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. The general-purpose processor may be a microprocessor or any conventional processor.

[0445] 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).

[0446] 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.

[0447] 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.

[0448] FIG9 is a schematic diagram of a chip system 3000 according to an embodiment of the present application. As shown in FIG9 , the chip system 3000 (or also referred to as a processing system) includes a logic circuit 3010 and an input / output interface 3020 .

[0449] Logic circuit 3010 may be a processing circuit in chip system 3000. Logic circuit 3010 calls instructions in a storage unit, enabling chip system 3000 to implement the methods and functions of various embodiments of the present application. Input / output interface 3020 may be an input / output circuit in chip system 3000, outputting information processed by logic circuit 3010 or inputting data or signaling information to be processed into logic circuit 3010 for processing.

[0450] 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.

[0451] 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.

[0452] 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 will not be repeated here for the sake of brevity.

[0453] 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.

[0454] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable medium, which stores program code. When the program code runs on a computer, the computer executes the method in the above method embodiment.

[0455] According to the method provided in the embodiments 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.

[0456] Those skilled 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 beyond the scope of this application.

[0457] Those skilled in the art will 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.

[0458] In the several embodiments provided in this 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 merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, 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.

[0459] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0460] 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.

[0461] 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, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method 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.

[0462] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection 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]; or, [c1,…,c 16 ] = ±[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]; or, [c1,…,c 16 ] = ±[-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]; or, [c1,…,c 16 ] = ±[-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]; or, [c1,…,c 16 ] = ±[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]; or, [c1,…,c 16 ] = ±[-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]; 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]; 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]; 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]; 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]; 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]; 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]; 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]; 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]; 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]; 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]; or, [c1,…,c 16 ] = ±[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]; or, [c1,…,c 16 ] = ±[-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]; or, [c1,…,c 16 ] = ±[-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]; or, [c1,…,c 16 ] = ±[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]; or, [c1,…,c 16 ] = ±[-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]; 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]; 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]; 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]; 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]; 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]; 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]; 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]; 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]; 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]; 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 .

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