Signal sending method, apparatus and device, and storage medium

Abstract

The present application provides a signal sending method, apparatus and device, and a storage medium. The signal sending method comprises: generating a first signal on the basis of at least one first sequence, where the first signal occupies at least one OFDM symbol or at least one OOK symbol in time domain; and sending the first signal.

Description

A signal sending method, device, apparatus and storage medium TECHNICAL FIELD The present application relates to the field of wireless communication, in particular to a signal sending method, device, apparatus and storage medium. BACKGROUND For the 5th Generation (5G) system, in addition to latency, reliability and availability, the energy efficiency of User Equipment (UE) is also crucial. Currently, 5G devices can need to be charged every week or every day according to the individual's usage time. Generally, a 5G device consumes tens of milliwatts of power in the Radio Resource Control (RRC) idle / inactive state and hundreds of milliwatts of power in the RRC connected state. Designing to extend the battery life is a necessary condition to improve energy efficiency and improve user experience. The power consumption of the UE depends on the length of the configured wake-up cycle, such as the paging cycle. To meet the battery life requirement, it is expected to use a valuable extended Discontinuous Reception (eDRX) cycle, which results in high latency and is not suitable for such services that require both battery life and low latency. Therefore, the introduction of a Low Power Wake-up signal (LP-WUS) mechanism is considered in the 3rd Generation Partnership Project (3GPP Rel-18). The low power wake-up mechanism involves a low power wake-up signal (LP-WUS), a low power synchronization signal (LP-SS), and a low power preamble (LP-Preamble). The waveform of the low power wake-up signal can be generated by an On-Off Keying (OOK) modulation method, which is called an OOK based LP-WUS. Currently, the generation and sending method of the OOK based LP-WUS has not been specifically determined. SUMMARY Therefore, the embodiments of the present application expect to provide a signal sending method, device, apparatus and storage medium. In a first aspect, the embodiments of the present application provide a signal sending method, comprising: generate a first signal according to at least one first sequence, wherein the first signal occupies at least one OFDM symbol or at least one OOK symbol in time domain; transmit the first signal. In a second aspect, an embodiment of the present application provides a signal transmission apparatus, comprising: a generating module configured to generate a first signal according to at least one first sequence, wherein the first signal occupies at least one OFDM symbol or at least one OOK symbol in time domain; a transmitting module configured to transmit the first signal. In a third aspect, an embodiment of the present application provides a signal transmission device, comprising: a memory configured to store a program; a processor configured to execute the program, when the program is executed, the signal transmission method according to any one of the implementations of the first aspect is executed. In a fourth aspect, an embodiment of the present application provides a nonvolatile storage medium, the storage medium comprises a stored program, when the program is executed, the signal transmission method according to any one of the implementations of the first aspect is executed. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram of a generation process of a first MC-OOK based LP-WUS; FIG. 2 is another schematic diagram of the generation process of the first MC-OOK based LP-WUS; FIG. 3 is a schematic diagram of a generation process of a second MC-OOK based LP-WUS; FIG. 4 is a flowchart of a signal transmission method according to an embodiment of the present application; FIG. 5 is a schematic diagram of a first signal generation according to an embodiment of the present application; FIG. 6 is a schematic diagram of a second signal generation according to an embodiment of the present application; FIG. 7 is a schematic diagram of a third signal generation according to an embodiment of the present application; FIG. 8 is a schematic diagram of a fourth signal generation according to an embodiment of the present application; FIG. 9 is a schematic diagram of a fifth signal generation according to an embodiment of the present application; FIG. 10 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present application; FIG. 11 is a schematic diagram of a signal transmission device according to an embodiment of the present application. DETAILED DESCRIPTION To make the application purposes, technical solutions and advantages of the present application more clear, the embodiments of the present application are described below with reference to the drawings, and it should be noted that the embodiments and features in the embodiments can be combined with each other in any manner without conflict. The low power wake-up mechanism involves LP-WUS, LP-SS, and LP-Preamble. The LP-WUS is used to carry low power wake-up information. The functions of the LP-SS include at least one of the following: performing Radio Resource Management (RRM) measurement by detecting the LP-SS, performing downlink synchronization by detecting the LP-SS, and performing frequency offset correction by detecting the LP-SS. The functions of the LP-Preamble include at least one of the following: performing RRM measurement by detecting the LP-Preamble, performing downlink synchronization by detecting the LP-Preamble, and performing frequency offset correction by detecting the LP-Preamble. In some embodiments, the transmission of the LP-Preamble is located before the transmission of the LP-WUS, and the terminal performs downlink synchronization and / or frequency offset correction by detecting the LP-Preamble, thereby improving the detection performance of the terminal in detecting the LP-WUS. The waveforms of the above signals (LP-WUS / LP-SS / LP-Preamble) can be generated by OOK modulation, which is referred to as OOK based LP-WUS / LP-SS / LP-Preamble. In addition, the above signals can be carried by multiple subcarriers in the present application, that is, when the number of subcarriers occupied by the OOK based LP-WUS / LP-SS / LP-Preamble in the frequency spectrum is greater than 1, it is referred to as Multiple Subcarrier (MC)-OOK based LP-WUS / LP-SS / LP-Preamble. The generation method of the MC-OOK based LP-WUS / LP-SS / LP-Preamble will be described below by taking the MC-OOK based LP-WUS as an example. FIG. 1 is a schematic diagram of the generation process of a first MC-OOK based LP-WUS. This method can generate a time domain expression form of M MC-OOK based LP-WUS symbols, where M is greater than or equal to 1, and the generation method includes: Step 1: The data information sent on the M OOK symbols is S M , S M = [s0, s1, s2, s3..., s M-1 ] and the length of S M is M. The data information S MIt can also be referred to as at least one of the following: Coded bit information, Coded sequence information, Code word information. Step 2: Convert S M to data information Q K , according to the following formula: K Wherein, Q i has a length of K, K is greater than or equal to 1. Or Wherein, A0+A1+…A M-1 =K. Wherein, data The value of i can be configured, wherein 0≤i≤M-1. Step 3: Convert data information Q K to data information D K = [d0, d1, d2, d3, …, d K-1 ] through K-point Discrete Fourier Transform (DFT) / Fast Fourier Transform (FFT) operation. Optionally, D K may also be subjected to at least one of the following operations: Upward circular shift operation is performed on D K , and the size of the circular shift is Or Or K / 2. Wherein, is the upward rounding operator, is the downward rounding operator. Downward circular shift operation is performed on D K , and the size of the circular shift is Or Or K / 2. Wherein, is the upward rounding operator, is the downward rounding operator. Left circular shift operation is performed on D K , and the size of the circular shift is or or K / 2. Wherein, is a rounding up operator, is a rounding down operator. to D K perform a right cyclic shift operation with a size of or or K / 2. Wherein, is a rounding up operator, is a rounding down operator. to D K perform a FFTSHIFT operation, wherein FFTSHIFT is a function for shifting the zero frequency component of a Fourier transform to the center of the spectrum. For a vector X, FFTSHIFT(X) swaps the left and right halves of X or swaps the upper and lower halves of X. For a matrix X, FFTSHIFT(X) swaps the first and third quadrants, and the second and fourth quadrants. Step 4: Fill the data information D K on K subcarriers in the frequency domain; when the overall frequency domain bandwidth of the system includes N subcarriers, then perform an N-point Inverse Discrete Fourier Transform (IDFT) / Inverse Fast Fourier Transform (IFFT) operation on the filled data on the N subcarriers to obtain time domain data T N = [t0, t1, t2, t3, …, t N-1 ] of N sampling points. Wherein N is greater than or equal to 1. Wherein T N = [t0, t1, t2, t3, …, t N-1 ] is the sampling point data of M OOK time domain symbols. Wherein [t0, t1, t2, t3, …, t N / M-1 ] is the sampling point data of the first OOK time domain symbol in the M OOK time domain symbols, [t N / M , t N / M+1 , …, t 2N / M-1 ] is the sampling point data of the second OOK time domain symbol in the M OOK time domain symbols, and so on, [t (M-1)N / M , t(M-1)N / M+1, …, t N-1is the sample point data of the Mth OOK time domain symbol in the M OOK time domain symbols. Optionally, before the N-point IDFT / IFFT operation is performed, the data filled on the N subcarriers can also be subjected to at least one of the following operations: an upward circular shift operation is performed on the data, and the size of the circular shift is or or N / 2. Wherein, is a rounding up operator, is a rounding down operator. a downward circular shift operation is performed on the data, and the size of the circular shift is or or N / 2. Wherein, is a rounding up operator, is a rounding down operator. a left circular shift operation is performed on the data, and the size of the circular shift is or or N / 2. Wherein, is a rounding up operator, is a rounding down operator. a right circular shift operation is performed on the data, and the size of the circular shift is or or N / 2. Wherein, is a rounding up operator, is a rounding down operator. an FFTSHIFT operation is performed on the data, wherein FFTSHIFT is a function for moving the zero frequency component of the Fourier transform to the center of the spectrum. For a vector X, FFTSHIFT(X) exchanges the left and right halves of X or exchanges the upper and lower halves of X. For a matrix X, FFTSHIFT(X) exchanges the first and third quadrants, and the second and fourth quadrants. Step 5: N sample point time domain data T N = [t0, t1, t2, t3,..., t N-1Before sending, a cyclic prefix (CP) operation needs to be performed, i.e. Ncp sample points of tail part of time domain data T N are copied to the head part of time domain data T N to form (N+Ncp) sample points of time domain data, and then the (N+Ncp) sample points of data are sent out. In addition, when the number of frequency domain subcarriers allocated for the MC-OOK based LP-WUS symbol is not equal to K, for example, when the number of frequency domain subcarriers allocated for the MC-OOK based LP-WUS symbol is K1, where K1 is not equal to K, the process of step 4 is modified as follows: (1) process the data information D K = [d0, d1, d2, d3, …, d K-1 ] to convert D K into E K1 , where E K1 = [e0, e1, e2, e3, …, e K1-1 ] Optionally, at least one of the following operations can be performed on E K1 : perform an upward cyclic shift operation on E with a cyclic shift size of or or K1 / 2. Wherein, is a ceiling operator, is a floor operator; perform a downward cyclic shift operation on E K1 with a cyclic shift size of or or K1 / 2. Wherein, is a ceiling operator, is a floor operator; perform a left cyclic shift operation on E K1 with a cyclic shift size of or or K1 / 2. Wherein, is a ceiling operator, a floor operator; E K1 performing a right circular shift operation on E or or K1 / 2. Wherein, a ceiling operator, a floor operator; E K1 performing a FFTSHIFT operation, where FFTSHIFT is a function for shifting the zero frequency component of a Fourier transform to the center of the spectrum. For a vector X, FFTSHIFT(X) swaps the left and right halves of X or swaps the upper and lower halves of X. For a matrix X, FFTSHIFT(X) swaps the first and third quadrants, and the second and fourth quadrants. (2) filling the data information E K1 onto K1 subcarriers in the frequency domain; (3) when the overall frequency domain bandwidth of the system includes N subcarriers, then performing an N-point IDFT / IFFT operation on the filled data on the N subcarriers to obtain time domain data T N = [t0, t1, t2, t3, …, t N-1 ] of N sampling points. Wherein, N is greater than or equal to 1. Wherein, T N = [t0, t1, t2, t3, …, t N-1 ] is the sampling point data of M OOK time domain symbols. Wherein, [t0, t1, t2, t3, …, t N / M-1 ] is the sampling point data of the first OOK time domain symbol in the M OOK time domain symbols, [t N / M , t N / M+1 , …, t 2N / M-1 ] is the sampling point data of the second OOK time domain symbol in the M OOK time domain symbols, and so on, [t (M-1)N / M , t(M-1)N / M+1, …, t N-1 ] is the sampling point data of the Mth OOK time domain symbol in the M OOK time domain symbols. Optionally, before performing the N-point IDFT / IFFT operation, at least one of the following operations can be performed on the data filled on the N subcarriers: performing an up circular shift operation on the data, and the size of the circular shift is or Or N / 2. Wherein, This is the round-up operator. This is the floor operator; Perform a downward circular shift operation on the data, with the shift size being... or Or N / 2. Wherein, This is the round-up operator. This is the floor operator; Perform a left circular shift operation on the data, with the shift size being... or Or N / 2. Wherein, This is the round-up operator. This is the floor operator; Perform a right circular shift operation on the data, with the shift size being... or Or N / 2. Wherein, This is the round-up operator. This is the floor operator; The FFT operation is performed on the data, where FFT is a function used to shift the zero-frequency component of the Fourier transform to the center of the spectrum. For a vector X, FFT(X) swaps the left and right halves of X or swaps the top and bottom halves of X. For a matrix X, FFT(X) swaps the first and third quadrants, and the second and fourth quadrants. The modified MC-OOK based LP-WUS generation process is shown in Figure 2. Figure 2 is a schematic diagram of another generation process for the first type of MC-OOK based LP-WUS. Figure 3 is a schematic diagram of the second MC-OOK based LP-WUS generation process. This method can generate time-domain representations of M MC-OOK based LP-WUS symbols, where M is greater than or equal to 1. The generation methods include: Step 1: The data information sent on M OOK symbols is S M Define S M= [s0, s1, s2, s3,..., s N-1 ] and length is M. Step 2: generate data information D according to the following formula M Generate data information Or Wherein, Wherein, is an integer greater than or equal to 1. Further, The value of is preferably N. Wherein, N is the number of subcarriers included in the system bandwidth. Wherein, data The value of can be configured. Wherein, 0≤i≤M-1. Step 3: the data information D is obtained by passing through the first processing module After the first processing module, the data information D is obtained K = [d0, d1, d2, d3,..., d K-1 ] T . Wherein, the first processing module includes at least one of the following operations: (1) to Generate data information D according to the following formula K Wherein, Preferably, is the generalized inverse matrix of F. Wherein, (X) -1 is the operation of inverting the matrix X, (X) H is the operation of finding the conjugate transpose matrix of matrix X, (X) T is the operation of finding the transpose matrix of matrix X. Wherein, F is a matrix composed of K column elements in the IDFT Matrix, and the matrix F is a matrix of rows K columns. Wherein, the expression of IDFT Matrix is Or Further, the K column elements in the IDFT Matrix which constitute F are located in the IDFT Matrix Column elements, at least by data information DK K subcarrier locations or subcarrier indices filled into the frequency domain are determined. (2) D K performing at least one of: D K performing an up-circular shift operation with a size of or or K / 2. Wherein, is a ceiling operator, is a floor operator; D K performing a down-circular shift operation with a size of or or K / 2. Wherein, is a ceiling operator, is a floor operator; D K performing a left-circular shift operation with a size of or or K / 2. Wherein, is a ceiling operator, is a floor operator; D K performing a right-circular shift operation with a size of or or K / 2. Wherein, is a ceiling operator, is a floor operator; D K performing an FFTSHIFT operation, where FFTSHIFT is a function for shifting the zero frequency component of a Fourier transform to the center of the spectrum. For a vector X, FFTSHIFT(X) swaps the left and right halves of X or swaps the upper and lower halves of X. For a matrix X, FFTSHIFT(X) swaps the first and third quadrants, and the second and fourth quadrants. Step 4: The data information D KThe data is padded onto K subcarriers in the frequency domain. When the overall frequency bandwidth of the system includes N subcarriers, N-point IDFT / IFFT operations are performed on the padded data on the N subcarriers to obtain time-domain data T at N sampling points. N =[t0,t1,t2,t3,…t, N-1 ]. Where N is greater than or equal to 1. Among them, T N =[t0,t1,t2,t3,...,t N-1 ] represents the sampling point data of M OOK time-domain symbols. Where, [0,t1,t2,t3,…,t N / M-1 ] represents the sampling point data of the first OOK time-domain symbol out of M OOK time-domain symbols, [t N / M ,t N / M+1 ,…,t 2N / M-1 ] represents the sampling point data of the second OOK time-domain symbol out of M OOK time-domain symbols, and so on, [t (M-1)N / M ,t(M-1)N / M+1,…,t N-1 ] represents the sampling point data of the Mth OOK time-domain symbol out of M OOK time-domain symbols. Step 5: Time-domain data T from N sampling points N =[t0,t1,t2,t3,…,t N-1 Before sending, a CP operation needs to be performed, which involves adding time-domain data T from N sampling points. N The information from the last Ncp sampling points is copied to the time-domain data T of N sampling points. N The header is used to form time-domain data with (N+Ncp) sampling points, and then the data of these (N+Ncp) sampling points is sent out. Additionally, in step 4, when the number of frequency domain subcarriers allocated to the MC-OOK based LP-WUS symbol is not equal to K, for example, when the number of frequency domain subcarriers allocated to the MC-OOK based LP-WUS symbol is K1, where K1 is not equal to K, then the process of step 4 is as follows: (1) Data information D K =[d0,d1,d2,d3,…,d K-1 Process D K Convert to E K1 E K1 =[e0,e1,e2,e3,…,e K1-1 ]; (2) Transfer data information E K1 Fill the K1 subcarriers in the frequency domain; (3) When the frequency domain bandwidth of the system as a whole includes N subcarriers, then an N-point IDFT / IFFT operation is performed on the padding data on the N subcarriers to obtain time domain data T of N sampling points N = [t0, t1, t2, t3, … t, N-1 ]. Wherein, N is greater than or equal to 1. Wherein, T N = [t0, t1, t2, t3, … t, N-1 ] is the sampling point data of M OOK time domain symbols. Wherein, [t0, t1, t2, t3, … t, N / M-1 ] is the sampling point data of the first OOK time domain symbol in the M OOK time domain symbols, [t N / M , t N / M+1 , …, t 2N / M-1 ] is the sampling point data of the second OOK time domain symbol in the M OOK time domain symbols, and so on, [t (M-1)N / M , t(M-1)N / M+1, …, t N-1 ] is the sampling point data of the Mth OOK time domain symbol in the M OOK time domain symbols. In addition, the embodiments of the present application also supplement the MC-OOK based LP-WUS generation method shown in FIGS. 1-3 as follows: the data information S M is processed by the following method 1 or method 2 to obtain data information Q K or data information Method 1: The data information sent on the M OOK symbols is S M , S M includes M elements, that is, the length of S M is M, and is expressed as S M = [s0, s1, s2, s3…, s M-1 ]. Step 1: generate Es M based on the element s i in the data information S i . Exemplarily, Es i can satisfy the following formula: Wherein, x i = 0 or x i = s i , y i = 0 or y i = s i . Step 2: generate data information Q i based on Es Kor data information Among them, Q K = [Es0, Es1, ..., Es] M-1 ], Q K The length is K, where K is greater than or equal to 1. For example, K can be the number of subcarriers occupied by LP-WUS / LP-SS / LP-Preamble in the frequency domain. It should be noted that the number of subcarriers corresponding to the protection bandwidth configured in the frequency domain for LP-WUS / LP-SS / LP-Preamble is not counted in the K subcarriers. The length is in, It is an integer greater than or equal to 1. For example, The value of can be N. Here, N represents the number of subcarriers included in the system bandwidth. Method 2: The data information transmitted on M OOK symbols is S M S M It contains M elements, namely S M The length is M, denoted as S. M =[s0,s1,s2,s3…,s M-1 ]. Step 1: Based on data information S M element s in i Generate Es i . For example, Es i The following formula can be satisfied: in, or for B in i Elements, for example It can be The last B in i There are n elements, 0 ≤ b i ≤B i -1. or for C in i Elements, for example It can be The first C i There are elements, 0 ≤ c i ≤C i -1. Among them, data The value can be configured, 0≤i≤M-1. In some embodiments, data It consists of at least one of the following: (1) Length is sequence (2) Length is sequence for Center front an element or A zero element or A padding element, where the padding element can be any predefined element. (3) Length is sequence for Mid-back an element or A zero element or A padding element. For example, sequence It can be a binary random sequence, such as the Zadoff-Chu (ZC) sequence, the maximum length linear feedback shift register (M-sequence), or a pseudo noise (PN) sequence. The repetition of the binary random sequence can also be performed. In some embodiments, the data The combination of the above sequences can also be performed, for example: The combination of the above sequences can also be performed, for example: The combination of the above sequences can also be performed, for example: For example, one element of the above sequence is Wherein, 0≤a≤A i -1, the above sequence can be multiplied by and / or divided by and / or added by and / or subtracted by an element. Again multiplied by and / or divided by and / or added by and / or subtracted by an element. Step 2: Based on Es i Generate data information Q K Or data information Wherein, Q K = [Es0, Es1,..., Es M-1 ], The length of Q K is K, K is greater than or equal to 1. For example, K can be the number of subcarriers occupied by LP-WUS / LP-SS / LP-Preamble in frequency domain. It should be noted that the number of subcarriers corresponding to the guard bandwidth configured by LP-WUS / LP-SS / LP-Preamble in frequency domain is not counted in the K subcarriers. The length of Q Wherein, Is an integer greater than or equal to 1. For example, The value of Q It should be noted that the number of subcarriers corresponding to the guard bandwidth configured by LP-WUS / LP-SS / LP-Preamble in frequency domain is not counted in the K subcarriers. Figure 4 is a flow chart of a signal sending method provided by an embodiment of the present application, as shown in Figure 4, the signal sending method provided by the embodiment includes: At step S410, a first signal is generated according to at least one first sequence, wherein the first signal occupies at least one OFDM symbol or at least one OOK symbol in time domain. The signal sending method provided by the embodiment is used for generating any one of the LP-WUS, the LP-SS and the LP-Preamble, and the LP-WUS, the LP-SS and the LP-Preamble can be generated according to any one of the methods shown in FIG. 1 to FIG. 3. The LP-WUS, the LP-SS and the LP-Preamble can be generated by a base station. In the embodiment, the first signal is generated according to at least one first sequence, and the first sequence can be a binary sequence. The generated first signal occupies at least one OFDM symbol or at least one OOK symbol in time domain. In order to make the first signal occupy at least one OFDM symbol or at least one OOK symbol in time domain, the first sequence needs to satisfy certain characteristics. For example, when the first sequence is a binary sequence with a length of 16, for example, 1010 1010 1010 1010, and M=4 at this time, the binary sequence is divided into four parts, Part0=1010, Part1=1010, Part2=1010 and Part3=1010. Each part is the data information S in the embodiments shown in FIG. 1 to FIG. 3.

[1010]

[1010] , Part2=

[1010] , Part3=

[1010] . Each part is the data information S in the embodiments shown in FIG. 1 to FIG. 3.

[1010] . Each part is the data information S in the embodiments shown in FIG. 1 to FIG. 3. M Then, the time domain expression form corresponding to the four OOK symbols is generated by using the method shown in FIG. 1 to FIG. 3. That is, the time domain expression of the first signal in the transmission of one OFDM symbol or four OOK symbols. At step S420, the first signal is sent. After the first signal is generated, the first signal can be sent. Since the first signal is generated by using at least one first sequence, when the first sequence is a binary sequence and the generated first signal occupies at least one OFDM symbol or at least one OOK symbol in time domain, the first sequence can be designed to make the first signal occupy very few OFDM symbols or OOK symbols in time domain. Therefore, the terminal only needs to detect the first signal in the time domain corresponding to a small number of symbols, which greatly reduces the power consumption of the terminal for detecting the wake-up signal. ​​In an embodiment of the present application, the first signal is generated according to the at least one first sequence, including: generating a second sequence according to the first sequence; and then generating the first signal according to the second sequence; wherein the second sequence includes the first sequence and at least one of the following: at least one padding element; and at least one element in the first sequence. That is, the first signal is generated according to the second sequence which is generated by adding at least one padding element to the first sequence or repeating at least one element in the first sequence. FIG. 5 is a diagram illustrating a first signal generation method according to an embodiment of the present application. As shown in FIG. 5, the first signal occupies N+4 OOK symbols. The first sequence information is carried in the N OOK symbols (OOK 0 to OOK (N-1)). The last two elements in the first sequence or two padding elements are carried in the OOK symbol X0 and the OOK symbol X1. The first two elements in the first sequence or two padding elements are carried in the OOK symbol Y0 and the OOK symbol Y1. FIG. 6 is a diagram illustrating a second signal generation method according to an embodiment of the present application. As shown in FIG. 6, the first signal occupies N+2 OOK symbols. The first sequence information is carried in the N OOK symbols (OOK 0 to OOK (N-1)). The last two elements in the first sequence or two padding elements are carried in the OOK symbol X0 and the OOK symbol X1. A time interval is configured after the first information, and the length of the time interval can be configured. Preferably, the length of the time interval is at least one OOK symbol or at least one OFDM symbol. In an embodiment, the first signal carries data information including M elements in M OOK symbols; wherein the M OOK symbols occupy resources in one OFDM symbol; and wherein M is an integer greater than 0. The data signal is, for example, S M , S M = [s0, s1, s2, s3, …, s M-1 ]. The data information S M = [s0, s1, s2, s3, …, s M-1 ] can be part of the first sequence or the second sequence. The first signal occupies part of the OFDM symbol including the M OOK symbols, and other OFDM symbols can not include M OOK symbols. In an embodiment, the M elements in the M OOK symbols include at least one non-zero element. In an embodiment, the first element and the last element in the M elements in the M OOK symbols carry the same information. In an embodiment, the M elements include A first-type elements and B second-type elements, and A and B satisfy at least one of the following: A is the same as B; A and B differ by 1; A and B differ by 2; A and B differ by less than or equal to M / 2; where M / 2 can be or i.e. rounding up or down M / 2. A and B differ by less than or equal to M / 4; where M / 4 can be or i.e. rounding up or down M / 4. wherein the combination of the first type of element and the second type of element comprises at least one of: the first type of element is zero and the second type of element is non-zero; the first type of element is -1 and the second type of element is 1. the first type of element is 0 and the second type of element is 1. In an embodiment, when M is 4, the number of B is 1; when M is 8, the number of B is 1 or 2. For example: when M=4, S M is at least one of: [1 0 0 0], [0 1 0 0], [0 0 1 0], [0 0 0 1], when M=8, S M is at least one of: [1 0 0 0 0 0 0 0], [0 1 0 0 0 0 0 0], [0 0 1 0 0 0 0 0], [0 0 0 1 0 0 0 0], [0 0 0 0 1 0 0 0], [0 0 0 0 0 1 0 0], [0 0 0 0 0 0 1 0], [0 0 0 0 0 0 0 1], when M=8, S M is at least one of: [1 0 0 0 0 0 0 0], [0 0 1 0 0 0 0 0], [0 0 0 0 1 0 0 0], [0 0 0 0 0 0 1 0], when M=8, S M is at least one of: [0 1 0 0 0 0 0 0], [0 0 0 1 0 0 0 0], [0 0 0 0 0 1 0 0], [0 0 0 0 0 0 0 1], when M=8, SM is at least one of the following: [1 0 0 0 0 0 0 0], [0 0 0 1 0 0 0 0], [0 0 0 0 0 0 1 0] When M = 8, S M is at least one of the following: [1 0 0 0 0 0 0 0], [0 0 0 0 1 0 0 0] In the above examples, the "1" can also be replaced by other non-zero elements. In the above examples, the "0" can be converted to "-1". In the above examples, the "1" can be converted to "0", and the "0" can be converted to "-1". In an embodiment, the first sequence comprises the third sequence and at least one of the following: at least one padding element; at least one element in the third sequence; that is, the first sequence can be generated from the third sequence, the first sequence can be the third sequence directly, or the first sequence can be composed of the third sequence and at least one padding element, or the first sequence can be composed of the third sequence and at least one cyclic shift element; the cyclic shift element is an element in the third sequence. It should be noted that the following description of the first sequence also applies to the second sequence or the third sequence. In an embodiment, the first sequence adopts Manchester code. The Manchester code rule is as follows: When the bit signal is 0, the coded information is 10; when the bit signal is 1, the coded information is 01. For example, in the embodiment of the present application, when the first sequence is 10101010, and each element in the first sequence adopts Manchester code, the first sequence is converted to 01 10 01 10 01 10 01 10. In an embodiment, when the first sequence comprises multiple groups of data information of M elements, the number of the second type of elements in the multiple groups of data information of M elements is the same, or the difference between the number of the second type of elements in the multiple groups of data information of M elements is less than or equal to TH0, where TH0 is a configurable value or a predefined value. That is, for the first sequence, when it comprises multiple S M = [s0, s1, s2, s3…, s M-1 ], the number of the second type of elements in the multiple S M is the same. The first sequence is transmitted in the LP-WUS or the LP-SS or the LP-Preamble, which occupies multiple OFDM symbols, and one OFDM symbol further comprises M OOKs, so it can be considered that the first sequence is allocated to multiple groups of {M OOK symbols}. In an embodiment, the first sequence satisfies at least one of the following: Corr1 A,d is less than or equal to a first threshold value; Corr2 A,d is less than or equal to a second threshold value; |Corr1 A,d is less than or equal to a third threshold value; |Corr2 A,d is less than or equal to a fourth threshold value; Corr1 A,d / AutoCorr A is less than or equal to a fifth threshold value; Corr2 A,d / AutoCorr A is less than or equal to a sixth threshold value; |Corr1 A,d / AutoCorr A is less than or equal to a seventh threshold value; |Corr2 A,d / AutoCorr A is less than or equal to an eighth threshold value; wherein, or or or wherein, a first sequence is denoted as Seq A , Seq A = [a0, a1, a2, a3…, a NA-1 ], wherein, a length of Seq A is N A . Preferably, N A =M*(a number of OFDM symbols occupied by the first signal). Preferably, elements in Seq A may be 0 and 1 or 1 and -1. In an embodiment, d takes at least one of the following values: {1}, {1, 2}, {1, 2, 3}, {1, 2, 3, 4}. Optionally, when M=1, d is {1}; when M=2, d is {1, 2}; when M=4, d is {1, 2, 3, 4}. Preferably, when M = 2, d is consecutive 1 or 2 starting from 1 in {1, 2}. Preferably, when M = 4, d is consecutive 1 or 2 or 3 or 4 starting from 1 in {1, 2, 3, 4}. The following is described with M = 2, and the sequence length is length 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32. It should be noted that the following sequence is not limited to the case of M = 2, and the following sequence can also be used in the case of M being other values. For example, when 1 OFDM symbol includes M = 2 OOK symbols, the first sequence length N seq = 8 carried by the first signal occupies 4 OFDM symbols, i.e. a total of 8 OOK symbols. The first sequence is as follows, where each row represents a first sequence. In addition, the "0", "1", "-1" in the following table can be replaced with each other. Optionally, the "0" in the first sequence in each of the following tables can be replaced with "-1". Optionally, the "0" in the first sequence in each of the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with a sequence length of 8, 1 "1", 1 "0" or "-1" is sent in M = 2 OOK symbols, as shown in Table 1. Table 1 For example, the 6th row in Table 1, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1] a total of 4 groups of consecutive 2 elements, and the elements in each group are sent in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 10, 1 "1", 1 "0" or "-1" is sent in M = 2 OOK symbols, as shown in Table 2. Table 2 For example, the 7th row in Table 2, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1] a total of 5 groups of consecutive 2 elements, and the elements in each group are sent in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 12, 1 "1", 1 "0" or "-1" is sent in M = 2 OOK symbols, as shown in Table 3. Table 3 For example, in the 8th row of Table 3, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1] totally 6 groups of 2 consecutive elements, and the elements in each group are transmitted in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with sequence length of 14, 1 "1", 1 "0" or "-1" is transmitted in M=2 OOK symbols, as shown in Table 4. Table 4 For example, in the 9th row of Table 4, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1] totally 7 groups of 2 consecutive elements, and the elements in each group are transmitted in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with sequence length of 16, 1 "1", 1 "0" or "-1" is transmitted in M=2 OOK symbols, as shown in Table 5. Table 5 For example, in the 10th row of Table 5, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1] totally 8 groups of 2 consecutive elements, and the elements in each group are transmitted in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with sequence length of 18, 1 "1", 1 "0" or "-1" is transmitted in M=2 OOK symbols, as shown in Table 6. Table 6 For example, in the 11th row of Table 6, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1] totally 9 groups of 2 consecutive elements, and the elements in each group are transmitted in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with sequence length of 20, 1 "1", 1 "0" or "-1" is transmitted in M=2 OOK symbols, as shown in Table 7. Table 7 For example, in the 12th row of Table 7, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1] totally 10 groups of 2 continuous elements, and the elements in each group are transmitted in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 22, 1 "1", 1 "0" or "-1" is transmitted in M = 2 OOK symbols, as shown in Table 8. Table 8 For example, in the 12th row of Table 7, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1] totally 10 groups of 2 continuous elements, and the elements in each group are transmitted in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 22, 1 "1", 1 "0" or "-1" is transmitted in M = 2 OOK symbols, as shown in Table 8. Table 8 For example, in the 12th row of Table 7, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1] totally 10 groups of 2 continuous elements, and the elements in each group are transmitted in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 22, 1 "1", 1 "0" or "-1" is transmitted in M = 2 OOK symbols, as shown in Table 8. Table 8 For example, in the 12th row of Table 7, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1] totally 10 groups of 2 continuous elements, and the elements in each group are transmitted in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 22, 1 "1", 1 "0" or "-1" is transmitted in M = 2 OOK symbols, as shown in Table 8. Table 11 For example, in the 16th row of Table 11, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1] totally 14 groups of continuous 2 elements, and the elements in each group are transmitted in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 30, 1 "1", 1 "0" or "-1" is transmitted in M = 2 OOK symbols, as shown in Table 12. Table 12 For example, in the 16th row of Table 11, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1] totally 14 groups of continuous 2 elements, and the elements in each group are transmitted in the corresponding 2 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 32, 1 "1", 1 "0" or "-1" is transmitted in M = 2 OOK symbols, as shown in Table 13. Table 13 For example, in the 16th row of Table 11, the first sequence includes [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1] totally 14 groups of continuous 2 elements, and the elements in each group are transmitted in the corresponding 2 OOK symbols in one OFDM symbol. The following is an example of M = 4, sequence length of length 8, 12, 16, 20, 24, 28, 32. It should be noted that the following sequence is not limited to the case of M = 4, and the following sequence can also be used in the case of M being other values. For example, when 1 OFDM symbol includes M = 4 OOK symbols, the first sequence length N seq= 8, occupying 2 OFDM symbols, i.e. occupying 8 OOK symbols in total. The first sequences are shown in the following table, in which each row represents a first sequence. In addition, the "0", "1", "-1" in the following table can be replaced with each other. Optionally, the "0" in the first sequences in the following tables can be replaced with "-1". Optionally, the "0" in the first sequences in the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequences with sequence length of 8, 1 "1" and 3 "0" or "-1" are sent in M = 4 OOK symbols, as shown in Table 14. Table 14 Taking the first row in Table 14 as an example, the first sequence includes [1, -1, -1, -1], [1, -1, -1, -1] totally 2 groups of consecutive 4 elements, and the elements in each group are sent in the corresponding 4 OOK symbols in one OFDM symbol. For the first sequences with sequence length of 8, 2 "1" and 2 "0" or "-1" are sent in M = 4 OOK symbols, as shown in Table 15. Table 15 Taking the first row in Table 15 as an example, the first sequence includes [1, 1, -1, -1], [-1, 1, -1, 1] totally 2 groups of consecutive 4 elements, and the elements in each group are sent in the corresponding 4 OOK symbols in one OFDM symbol. For example, when 1 OFDM symbol includes M = 4 OOK symbols, the first sequence length N seq = 12, occupying 3 OFDM symbols, i.e. occupying 12 OOK symbols in total. The first sequences are shown in the following table, in which each row represents a first sequence. In addition, the "0", "1", "-1" in the following table can be replaced with each other. Optionally, the "0" in the first sequences in the following tables can be replaced with "-1". Optionally, the "0" in the first sequences in the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequences with sequence length of 12, 1 "1" and 3 "0" or "-1" are sent in M = 4 OOK symbols, as shown in Table 16. Table 16 For example, in the first row of Table 16, the first sequence includes [-1, -1, 1, -1], [-1, -1, -1, 1], [-1, -1, -1, 1] in total 3 groups of 4 consecutive elements, and the elements in each group are transmitted in the corresponding 4 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 12, 2 "1"s, 2 "0"s or "-1"s are transmitted in M = 4 OOK symbols, as shown in Table 17. Table 17 For example, in the first row of Table 17, the first sequence includes [1, 1, -1, -1], [-1, -1, 1, 1], [-1, 1, -1, 1] in total 3 groups of 4 consecutive elements, and the elements in each group are transmitted in the corresponding 4 OOK symbols in one OFDM symbol. For example, when M = 4 OOK symbols are included in one OFDM symbol, the first sequence length N of the first signal borne is 16, and occupies 4 OFDM symbols, i.e., a total of 16 OOK symbols are occupied. seq = 16, occupies 4 OFDM symbols, i.e., a total of 16 OOK symbols are occupied. The first sequences are as follows, where each row represents a first sequence. In addition, the "0", "1", and "-1" in the following table can be replaced with each other. Optionally, the "0" in the first sequence in each of the following tables can be replaced with "-1". Optionally, the "0" in the first sequence in each of the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with a sequence length of 16, 1 "1", 3 "0"s or "-1"s are transmitted in M = 4 OOK symbols, as shown in Table 18. Table 18 For example, in the first row of Table 18, the first sequence includes [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1] in total 4 groups of 4 consecutive elements, and the elements in each group are transmitted in the corresponding 4 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 16, 2 "1"s, 2 "0"s or "-1"s are transmitted in M = 4 OOK symbols, as shown in Table 19 and Table 20. Table 19 Table 20 For example, the first sequence in the first row of Table 21 includes [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, -1, 1] totally 5 groups of 4 consecutive elements, and the elements in each group are transmitted in the corresponding 4 OOK symbols in one OFDM symbol. For example, when one OFDM symbol includes M = 4 OOK symbols, the first sequence carried by the first signal has a length N seq = 20, and occupies 5 OFDM symbols, i.e., totally 20 OOK symbols. The first sequences are shown in the following table, in which each row represents one first sequence. In addition, the "0", "1", and "-1" in the following table can be replaced with each other. Optionally, the "0" in the first sequence in each of the following tables can be replaced with "-1". Optionally, the "0" in the first sequence in each of the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with a sequence length of 20, one "1" is transmitted in M = 4 OOK symbols, and 3 "0"s or "-1"s are transmitted, as shown in Table 21. Table 21 For example, the first sequence in the first row of Table 21 includes [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, -1, 1] totally 5 groups of 4 consecutive elements, and the elements in each group are transmitted in the corresponding 4 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 20, two "1"s are transmitted in M = 4 OOK symbols, and 2 "0"s or "-1"s are transmitted, as shown in Table 22. Table 22 For example, the first sequence in the first row of Table 22 includes [1, 1, -1, -1], [-1, -1, 1, 1], [1, 1, -1, -1], [1, -1, 1, -1], [-1, 1, -1, 1] totally 5 groups of 4 consecutive elements, and the elements in each group are transmitted in the corresponding 4 OOK symbols in one OFDM symbol. For example, when one OFDM symbol includes M = 4 OOK symbols, the first sequence carried by the first signal has a length Nseq = 24, occupying 6 OFDM symbols, i.e. occupying 24 OOK symbols in total. The first sequences are shown in the following table, in which each row represents a first sequence. In addition, the "0", "1", "-1" in the following table can be replaced with each other. Alternatively, the "0" in the first sequences in the following tables can be replaced with "-1". Alternatively, the "0" in the first sequences in the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with a sequence length of 24, 1 "1", 3 "0" or "-1" are sent in M = 4 OOK symbols, as shown in Table 23. Table 23 Taking the first row in Table 23 as an example, the first sequence includes [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1], [-1, 1, -1, -1] a total of 6 groups of consecutive 4 elements, and the elements in each group are sent in the corresponding 4 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 24, 2 "1", 2 "0" or "-1" are sent in M = 4 OOK symbols, as shown in Table 24 and Table 25. Table 24 Table 25 Taking the first row in Table 24 as an example, the first sequence includes [-1, -1, 1, 1], [1, 1, -1, -1], [-1, -1, 1, 1], [1, -1, 1, -1], [1, -1, 1, -1], [-1, 1, 1, -1] a total of 6 groups of consecutive 4 elements, and the elements in each group are sent in the corresponding 4 OOK symbols in one OFDM symbol. Table 25 is a group of special sequences, and the 4 sequences in Table 25 are orthogonal or have low cross-correlation. For example, when 1 OFDM symbol includes M = 4 OOK symbols, the first sequence length N seq = 28, occupying 7 OFDM symbols, i.e. occupying 28 OOK symbols in total. The first sequences are shown in the following table, in which each row represents a first sequence. In addition, the "0", "1", "-1" in the following table can be replaced with each other. Alternatively, the "0" in the first sequences in the following tables can be replaced with "-1". Optionally, "0" in the first sequence in each of the following tables can be replaced by "1", and "1" can be replaced by "-1". For the first sequence with sequence length of 28, 1 "1" and 3 "0" or "-1" are sent in M=4 OOK symbols, as shown in Table 26. Table 26 For example, the first sequence in the first row of Table 26 includes [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1], [-1, 1, -1, -1], [-1, 1, -1, -1], [-1, 1, -1, -1], [-1, 1, -1, -1] totally 7 groups of 4 consecutive elements, and the elements in each group are sent in the corresponding 4 OOK symbols in one OFDM symbol. For the first sequence with sequence length of 28, 2 "1" and 2 "0" or "-1" are sent in M=4 OOK symbols, as shown in Table 27. Table 27 For example, the first sequence in the first row of Table 27 includes [-1, -1, 1, 1], [-1, 1, 1, -1], [1, -1, 1, -1], [-1, 1, -1, 1], [1, 1, -1, -1], [-1, -1, 1, 1], [1, 1, -1, -1] totally 7 groups of 4 consecutive elements, and the elements in each group are sent in the corresponding 4 OOK symbols in one OFDM symbol. For example, when M=4 OOK symbols are included in one OFDM symbol, the first sequence length N seq =32 carried by the first signal occupies 8 OFDM symbols, i.e. 32 OOK symbols in total. The first sequence is as follows, wherein each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced by each other. Optionally, "0" in the first sequence in each of the following tables can be replaced by "-1". Optionally, "0" in the first sequence in each of the following tables can be replaced by "1", and "1" can be replaced by "-1". For the first sequence with sequence length of 32, 1 "1" and 3 "0" or "-1" are sent in M=4 OOK symbols, as shown in Table 28. Table 28 For example, in the first row of Table 28, the first sequence includes [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, -1, 1], [-1, -1, -1, 1], [-1, -1, -1, 1], [-1, -1, -1, 1] totally 8 groups of 4 consecutive elements, and the elements in each group are transmitted in the corresponding 4 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 32, 2 "1"s, 2 "0"s or "-1"s are transmitted in M=4 OOK symbols, as shown in Table 29 and Table 30. Table 29 Table 30 For example, in the first row of Table 29, the first sequence includes [-1, 1, -1, 1], [1, -1, 1, -1], [-1, 1, -1, 1], [-1, -1, 1, 1], [1, 1, -1, -1], [-1, -1, 1, 1], [1, 1, -1, -1], [-1, -1, 1, 1] totally 8 groups of 4 consecutive elements, and the elements in each group are transmitted in the corresponding 4 OOK symbols in one OFDM symbol. Table 30 is a group of special sequences, and preferably, 4 consecutive sequences starting from the first row of Table 30 (i.e., starting from the first sequence) are selected as a group of sequences, which are preferably configured to be LP-SS or LP=Preamble. The selected 4 sequences in Table 20 are orthogonal or have low cross-correlation. The following is an example of M=8 and sequence length of 8, 16, 24, 32. It should be noted that the following sequences are not limited to the case of M=8, and the following sequences can also be used in the case of M being other values. For example, when 1 OFDM symbol includes M=8 OOK symbols, the first sequence carried by the first signal has a sequence length N seq =8, and occupies 1 OFDM symbol, i.e., a total of 8 OOK symbols. The first sequence is as follows, where each row represents a first sequence. In addition, the "0", "1", "-1" in the following table can be replaced with each other. Alternatively, the "0" in the first sequence in each of the following tables can be replaced with "-1". Alternatively, the "0" in the first sequence in each of the following tables can be replaced with "1", and the "1" can be replaced with "-1". For a first sequence of sequence length 8, M = 8 OOK symbols transmit 1 "1", 7 "0"s or "-1"s, as shown in Table 31. Table 31 As an example, the first sequence in the first row of Table 31 includes [1, 0, 0, 0, 0, 0, 0, 0] for a total of 1 set of 8 consecutive elements, with the elements in each set transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For a first sequence of sequence length 8, M = 8 OOK symbols transmit 2 "1"s, 6 "0"s or "-1"s, as shown in Table 32. Table 32 As an example, the first sequence in the first row of Table 32 includes [1, 0, 0, 0, 1, 0, 0, 0] for a total of 1 set of 8 consecutive elements, with the elements in each set transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For a first sequence of sequence length 8, M = 8 OOK symbols transmit 3 "1"s, 5 "0"s or "-1"s, as shown in Table 33. Table 33 As an example, the first sequence in the first row of Table 33 includes [1, 1, 0, 0, 0, 1, 0, 0] for a total of 1 set of 8 consecutive elements, with the elements in each set transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For a first sequence of sequence length 8, M = 8 OOK symbols transmit 4 "1"s, 4 "0"s or "-1"s, as shown in Table 34. Table 34 As an example, the first sequence in the first row of Table 34 includes [1, 1, 0, 0, 1, 0, 0, 1] for a total of 1 set of 8 consecutive elements, with the elements in each set transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For a first sequence of sequence length 8, M = 8 OOK symbols transmit 5 "1"s, 3 "0"s or "-1"s, as shown in Table 35. Table 35 As an example, the first sequence in the first row of Table 35 includes [1, 1, 0, 1, 0, 1, 0, 1] for a total of 1 set of 8 consecutive elements, with the elements in each set transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For example, when M = 8 OOK symbols are included in one OFDM symbol, the first sequence length N seq = 16 carried by the first signal occupies 2 OFDM symbols, i.e. 16 OOK symbols in total. The first sequences are shown in the following table, where each row represents one first sequence. In addition, the "0", "1", "-1" in the following table can be replaced with each other. Optionally, the "0" in the first sequences in the following tables can be replaced with "-1". Optionally, the "0" in the first sequences in the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with sequence length 16, 1 "1" and 7 "0" or "-1" are transmitted in M = 8 OOK symbols, as shown in Table 36. Table 36 For example, the first sequence in the first row of Table 36 includes [1, 0, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 0] a total of 2 groups of 8 consecutive elements, and the elements in each group are transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with sequence length 16, 2 "1" and 6 "0" or "-1" are transmitted in M = 8 OOK symbols, as shown in Table 37. Table 37 For example, the first sequence in the first row of Table 37 includes [1, 1, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, 0, 1, 0, 0] a total of 2 groups of 8 consecutive elements, and the elements in each group are transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with sequence length 16, 3 "1" and 5 "0" or "-1" are transmitted in M = 8 OOK symbols, as shown in Table 38. Table 38 For example, the first sequence in the first row of Table 38 includes [1, 1, 0, 0, 0, 1, 0, 0], [1, 0, 0, 0, 1, 0, 0, 1] a total of 2 groups of 8 consecutive elements, and the elements in each group are transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with sequence length 16, 4 "1" and 4 "0" or "-1" are transmitted in M = 8 OOK symbols, as shown in Table 39. Table 39 For example, in the first row of Table 39, the first sequence includes [1, 0, 1, 0, 1, 0, 1, 0], [1, 0, 1, 0, 1, 0, 1, 0] totally 2 groups of 8 consecutive elements, and the elements in each group are transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 16, 5 "1"s, 3 "0"s or "-1"s are transmitted in M = 8 OOK symbols, as shown in Table 40. Table 40 For example, in the first row of Table 40, the first sequence includes [1, 1, 0, 1, 0, 1, 0, 1], [0, 1, 1, 0, 1, 0, 1, 1] totally 2 groups of 8 consecutive elements, and the elements in each group are transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For example, when M = 8 OOK symbols are included in one OFDM symbol, the first sequence length N of the first signal borne is 24, and 3 OFDM symbols are occupied, i.e., 24 OOK symbols are occupied in total. seq = 24, and 3 OFDM symbols are occupied, i.e., 24 OOK symbols are occupied in total. The first sequences are as follows, wherein each row represents a first sequence. In addition, the "0", "1", and "-1" in the following table can be replaced with each other. Optionally, the "0" in the first sequence in each of the following tables can be replaced with "-1". Optionally, the "0" in the first sequence in each of the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with a sequence length of 24, 1 "1", 7 "0"s or "-1"s are transmitted in M = 8 OOK symbols, as shown in Table 41. Table 41 For example, in the first row of Table 41, the first sequence includes [1, 0, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 0] totally 3 groups of 8 consecutive elements, and the elements in each group are transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 24, 2 "1"s, 6 "0"s or "-1"s are transmitted in M = 8 OOK symbols, as shown in Table 42. Table 42 For example, in the first row of Table 42, the first sequence includes [1, 1, 0, 0, 0, 0, 0, 0], [1, 0, 0, 1, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 1] in total 3 groups of 8 consecutive elements, and the elements in each group are transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 24, M = 8 OOK symbols transmit 3 "1"s, 5 "0"s or "-1"s, as shown in Table 43. Table 43 For example, in the first row of Table 43, the first sequence includes [1, 1, 0, 0, 1, 0, 0, 0], [1, 0, 0, 1, 0, 0, 1, 0], [0, 1, 0, 0, 1, 0, 0, 1] in total 3 groups of 8 consecutive elements, and the elements in each group are transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 24, M = 8 OOK symbols transmit 4 "1"s, 4 "0"s or "-1"s, as shown in Table 44. Table 44 For example, in the first row of Table 44, the first sequence includes [1, 0, 1, 0, 1, 0, 1, 0], [1, 0, 1, 0, 1, 0, 1, 0], [1, 0, 1, 0, 1, 0, 1, 0] in total 3 groups of 8 consecutive elements, and the elements in each group are transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 24, M = 8 OOK symbols transmit 5 "1"s, 3 "0"s or "-1"s, as shown in Table 45. Table 45 For example, in the first row of Table 45, the first sequence includes [1, 1, 1, 1, -1, -1, 1, -1], [-1, -1, 1, 1, 1, 1, -1, 1], [1, 1, -1, 1, -1, 1, 1, -1] in total 3 groups of 8 consecutive elements, and the elements in each group are transmitted in the corresponding 8 OOK symbols in one OFDM symbol. For example, when 1 OFDM symbol includes M = 8 OOK symbols, the first sequence length N seq= 32, occupying 4 OFDM symbols, i.e. 32 OOK symbols in total. The first sequences are as follows, where each row represents a first sequence. In addition, the "0", "1", "-1" in the following tables can be replaced with each other. Optionally, the "0" in the first sequences in the following tables can be replaced with "-1". Optionally, the "0" in the first sequences in the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with a sequence length of 32, 1 "1" and 7 "0" or "-1" are sent in M = 8 OOK symbols, as shown in Table 46. Table 46 Taking the first row in Table 46 as an example, the first sequence includes [1, 0, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 0] a total of 4 groups of 8 consecutive elements, and the elements in each group are sent in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 32, 2 "1" and 6 "0" or "-1" are sent in M = 8 OOK symbols, as shown in Table 47. Table 47 Taking the first row in Table 47 as an example, the first sequence includes [1, 0, 0, 0, 0, 1, 0, 0], [0, 0, 1, 1, 0, 0, 0, 0], [1, 0, 0, 0, 0, 1, 0, 0], [0, 0, 1, 0, 0, 0, 0, 1] a total of 4 groups of 8 consecutive elements, and the elements in each group are sent in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with a sequence length of 32, 3 "1" and 5 "0" or "-1" are sent in M = 8 OOK symbols, as shown in Table 48. Table 48 Taking the first row in Table 48 as an example, the first sequence includes [1, 0, 0, 1, 0, 0, 1, 0], [0, 1, 0, 0, 1, 0, 0, 1], [0, 1, 0, 1, 0, 0, 1, 0], [0, 1, 0, 0, 1, 0, 0, 1] a total of 4 groups of 8 consecutive elements, and the elements in each group are sent in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with sequence length of 32, 4 "1"s, 4 "0"s or "-1"s are sent in M=8 OOK symbols, as shown in Table 49. Table 49 For example, the first sequence in the first row of Table 49 includes [1, 0, 1, 0, 1, 0, 1, 0], [1, 0, 1, 0, 1, 0, 1, 0], [1, 0, 1, 0, 1, 0, 1, 0], [1, 0, 1, 0, 1, 0, 1, 0] totally 4 groups of consecutive 8 elements, and the elements in each group are sent in the corresponding 8 OOK symbols in one OFDM symbol. For the first sequence with sequence length of 32, 5 "1"s, 3 "0"s or "-1"s are sent in M=8 OOK symbols, as shown in Table 50. Table 50 For example, the first sequence in the first row of Table 50 includes [1, 1, 1, 1, -1, -1, 1, -1], [-1, -1, 1, 1, 1, -1, 1, 1], [-1, 1, 1, 1, -1, 1, -1, 1], [1, 1, 1, -1, -1, 1, -1, 1] totally 4 groups of consecutive 8 elements, and the elements in each group are sent in the corresponding 8 OOK symbols in one OFDM symbol. In an embodiment, a part of elements in the first sequence are sent in the first type of OOK symbols, and another part of elements are sent in the second type of OOK symbols; wherein the time domain position of the first type of OOK symbols is in the OFDM symbol, and the data position of the second type of OOK symbols is in the cyclic prefix of the OFDM symbol. FIG. 7 is a third signal generation diagram provided by an embodiment of the present application. As shown in FIG. 7, the first signal occupies N+4 OOK symbols. Of the N OOK symbols (OOK 0 to OOK (N-1)), the first sequence information is carried. The last two elements of the first sequence or two padding elements are carried in OOK symbol X0 and OOK symbol X1. The first two elements of the first sequence or two padding elements are carried in OOK symbol Y0 and OOK symbol Y1. FIG. 8 is a fourth signal generation diagram provided by an embodiment of the present application. As shown in FIG. 8, the first signal occupies N+2 OOK symbols. Of the N OOK symbols (OOK 0 to OOK (N-1)), the first sequence information is carried. The last two elements of the first sequence or two padding elements are carried in OOK symbol X0 and OOK symbol X1. A time interval of at least one OOK symbol or at least one OFDM symbol is further configured after the first information. The OOK symbols in FIG. 7 or FIG. 8 include the first type of OOK symbol and / or the second type of OOK symbol. In an embodiment, the second type of OOK symbol occupies all or part of the time domain resources of the cyclic prefix of the OFDM symbol. In an embodiment, the first type of OOK symbol and the second type of OOK symbol occupy the same frequency domain resources. In an embodiment, the element carried by the second type of OOK symbol is the same as the element in the first sequence carried by the last first type of OOK symbol of the M first type of OOK symbols in the corresponding OFDM symbol. In an embodiment, the time domain expression of the second type of OOK symbol is generated in the following manner: based on the time domain expression of the first length in the time domain expression of the last first type of OOK symbol of the M first type of OOK symbols in the corresponding OFDM symbol; or based on the time domain expression of the first length in the time domain expression of the corresponding OFDM symbol; wherein the first length is less than or equal to the length of the cyclic prefix in the OFDM symbol. In an embodiment, when the first signal occupies Y OFDM symbols, and each OFDM symbol includes M first type of OOK symbols and one second type of OOK symbol, the method includes at least one of the following: at least one first sequence is carried by the Y*M first type of OOK symbols; at least one first sequence is carried by the Y*M first type of OOK symbols and the Y second type of OOK symbols; wherein Y is an integer greater than or equal to 1. The following is an example when M=2, the sequence length is 8+4 or 8, 10+5 or 10, 12+6 or 12, 14+7 or 14, 2i+i or 2i, where i is an integer greater than or equal to 8. For example, when 1 OFDM symbol includes M=2 OOK symbols, the first sequence length carried by the first signal has two options, i.e. N seq =8+4 or N seq =8, occupying 4 OFDM symbols. When N seq =8+4, the first sequence occupies 12 OOK symbols, of which the number of OOK symbols of the first type is 8 and the number of OOK symbols of the second type is 4. When N seq =8, the first sequence occupies 8 OOK symbols, of which the number of OOK symbols of the first type is 8. The first sequence is as follows, where each row represents a first sequence. In addition, the "0", "1", "-1" in the following table can be replaced with each other. Optionally, the "0" in the first sequence in each of the following tables can be replaced with "-1". Optionally, the "0" in the first sequence in each of the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with a sequence length of 8, 1 "1", 1 "0" or "-1" is transmitted in the M=2 OOK symbols of the first type, as shown in Table 51, and for the first sequence with a sequence length of 12, 1 "1", 1 "0" or "-1" is transmitted in the M=2 OOK symbols of the first type, as shown in Table 52. Table 51 Table 52 For example, when 1 OFDM symbol includes M=2 OOK symbols, the first sequence length carried by the first signal has two options, i.e. N seq =10+5 or N seq =10, occupying 5 OFDM symbols. When N seq =10+5, the first sequence occupies 15 OOK symbols, of which the number of OOK symbols of the first type is 10 and the number of OOK symbols of the second type is 5. When N seq =10, the first sequence occupies 10 OOK symbols, of which the number of OOK symbols of the first type is 10. The first sequences are as follows, where each row represents a first sequence. In addition, the "0", "1", "-1" in the following tables can be replaced with each other. Alternatively, the "0" in the first sequences in the following tables can be replaced with "-1". Alternatively, the "0" in the first sequences in the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequences with a sequence length of 10, 1 "1", 1 "0" or "-1" is transmitted in the M=2 OOK symbols of the first type, as shown in Table 53. For the first sequences with a sequence length of 15, 1 "1", 1 "0" or "-1" is transmitted in the M=2 OOK symbols of the first type, as shown in Table 54. Table 53 Table 54 For example, when M=2 OOK symbols are included in 1 OFDM symbol, the first sequence length borne by the first signal has two options, i.e. N seq = 12+6 or N seq = 12, occupying 6 OFDM symbols. When N seq = 12+6, the first sequence occupies 18 OOK symbols, of which the number of OOK symbols of the first type is 12 and the number of OOK symbols of the second type is 6. When N seq = 12, the first sequence occupies 12 OOK symbols, of which the number of OOK symbols of the first type is 12. The first sequences are as follows, where each row represents a first sequence. In addition, the "0", "1", "-1" in the following tables can be replaced with each other. Alternatively, the "0" in the first sequences in the following tables can be replaced with "-1". Alternatively, the "0" in the first sequences in the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequences with a sequence length of 12, 1 "1", 1 "0" or "-1" is transmitted in the M=2 OOK symbols of the first type, as shown in Table 55. For the first sequences with a sequence length of 18, 1 "1", 1 "0" or "-1" is transmitted in the M=2 OOK symbols of the first type, as shown in Table 56. Table 55 Table 56 For example, when 1 OFDM symbol includes M = 2 OOK symbols, the first sequence length carried by the first signal has two options, i.e. N seq = 14 + 7 or N seq = 14, occupying 7 OFDM symbols. When N seq = 14 + 7, the first sequence occupies 21 OOK symbols, in which the number of OOK symbols of the first type is 14, and the number of OOK symbols of the second type is 7. When N seq = 14, the first sequence occupies 14 OOK symbols, in which the number of OOK symbols of the first type is 14. The first sequences are as follows, in which each row represents a first sequence. In addition, the "0", "1", "-1" in the following table can be replaced with each other. Optionally, the "0" in the first sequence in each of the following tables can be replaced with "-1". Optionally, the "0" in the first sequence in each of the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with a sequence length of 14, 1 "1", 1 "0" or "-1" is sent in the M = 2 OOK symbols of the first type, as shown in Table 57, and for the first sequence with a sequence length of 21, 1 "1", 1 "0" or "-1" is sent in the M = 2 OOK symbols of the first type, as shown in Table 58. Table 57 Table 58 For example, when 1 OFDM symbol includes M = 2 OOK symbols, the first sequence length carried by the first signal has two options, i.e. N seq = 2i + i or N seq = 2i, occupying i OFDM symbols. Wherein, i is an integer greater than or equal to 8. When N seq = 2i + i, the first sequence occupies 2i + i OOK symbols, in which the number of OOK symbols of the first type is 2i, and the number of OOK symbols of the second type is i. When N seq = 2i, the first sequence occupies 2i OOK symbols, in which the number of OOK symbols of the first type is 2i. The first sequences are as follows, in which each row represents a first sequence. In addition, the "0", "1", "-1" in the following table can be replaced with each other. Optionally, "0" in the first sequence in each of the following tables can be replaced by "-1". Optionally, "0" in the first sequence in each of the following tables can be replaced by "1", and "1" can be replaced by "-1". For the first sequence with a sequence length of 2i, 1 "1", 1 "0" or "-1" is transmitted in M=2 OOK symbols of the first type, for example, Seq1 or Seq2. For the first sequence with a sequence length of 2i+i, 1 "1", 1 "0" or "-1" is transmitted in M=2 OOK symbols of the first type, for example, Seq3 or Seq4, Seq3 corresponds to Seq1, and Seq4 corresponds to Seq2. The following is M=4, the sequence length is length 8+2 or 8, 12+3 or 12, 16+4 or 16, 20+5 or 20, 24+6 or 24, 28+7 or 28, 32+8 or 32. For example, when M=4 OOK symbols are included in 1 OFDM symbol, the first sequence length carried by the first signal has two options, i.e. N seq =8+2 or N seq =8, occupying 2 OFDM symbols. When N seq =8+2, the first sequence occupies 10 OOK symbols, of which the number of OOK symbols of the first type is 8, and the number of OOK symbols of the second type is 2. When N seq =8, the first sequence occupies 8 OOK symbols, of which the number of OOK symbols of the first type is 8. The first sequence is as follows, and each row in the table represents a first sequence. In addition, "0", "1", "-1" in the following table can be replaced with each other. Optionally, "0" in the first sequence in each of the following tables can be replaced by "-1". Optionally, "0" in the first sequence in each of the following tables can be replaced by "1", and "1" can be replaced by "-1". For the first sequence with a sequence length of 8, 1 "1", 3 "0" or "-1" is transmitted in M=4 OOK symbols of the first type, as shown in Table 59, and for the first sequence with a sequence length of 10, 1 "1", 3 "0" or "-1" is transmitted in M=4 OOK symbols of the first type, as shown in Table 60. Table 59 Table 60 For the first sequence with sequence length of 8, 2 "1"s, 2 "0"s or "-1"s are sent in the M=4 OOK symbols of the first type, as shown in Table 61. For the first sequence with sequence length of 10, 2 "1"s, 2 "0"s or "-1"s are sent in the M=4 OOK symbols of the first type, as shown in Table 62. Table 61 Table 62 For example, when M=4 OOK symbols are included in 1 OFDM symbol, the first sequence length carried by the first signal has two options, i.e. N seq = 12+3 or N seq = 12, occupying 3 OFDM symbols. When N seq = 12+3, the first sequence occupies 15 OOK symbols, in which the number of OOK symbols of the first type is 12 and the number of OOK symbols of the second type is 3. When N seq = 12, the first sequence occupies 12 OOK symbols, in which the number of OOK symbols of the first type is 12. The first sequences are as follows, in which each row represents a first sequence. In addition, "0", "1" and "-1" in the following tables can be replaced with each other. Optionally, "0" in the first sequences in the following tables can be replaced with "-1". Optionally, "0" in the first sequences in the following tables can be replaced with "1", and "1" can be replaced with "-1". For the first sequence with sequence length of 12, 1 "1", 3 "0"s or "-1"s are sent in the M=4 OOK symbols of the first type, as shown in Table 63. For the first sequence with sequence length of 15, 1 "1", 3 "0"s or "-1"s are sent in the M=4 OOK symbols of the first type, as shown in Table 64. Table 63 Table 64 For the first sequence with sequence length of 12, 2 "1"s, 2 "0"s or "-1"s are sent in the M=4 OOK symbols of the first type, as shown in Table 65. For the first sequence with sequence length of 15, 2 "1"s, 2 "0"s or "-1"s are sent in the M=4 OOK symbols of the first type, as shown in Table 66. Table 65 Table 66 For example, when one OFDM symbol includes M=4 OOK symbols, the first sequence length carried by the first signal has two options, i.e., N seq = 16+4 or N seq = 16, occupying 4 OFDM symbols. When N seq = 16+4, the first sequence occupies 20 OOK symbols, in which the number of OOK symbols of the first type is 16 and the number of OOK symbols of the second type is 4. When N seq = 16, the first sequence occupies 16 OOK symbols, in which the number of OOK symbols of the first type is 16. The first sequences are shown in the following tables, in which each row represents one first sequence. In addition, the "0", "1", "-1" in the following tables can be replaced with each other. Optionally, the "0" in the first sequences in the following tables can be replaced with "-1". Optionally, the "0" in the first sequences in the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with a sequence length of 16, 1 "1", 3 "0" or "-1" are sent in the M=4 OOK symbols of the first type, as shown in Table 67, and for the first sequence with a sequence length of 20, 1 "1", 3 "0" or "-1" are sent in the M=4 OOK symbols of the first type, as shown in Table 68. Table 67 Table 68 For the first sequence with a sequence length of 12, 2 "1", 2 "0" or "-1" are sent in the M=4 OOK symbols of the first type, as shown in Table 69, and for the first sequence with a sequence length of 15, 2 "1", 2 "0" or "-1" are sent in the M=4 OOK symbols of the first type, as shown in Table 70. Table 69 Table 70 For example, when one OFDM symbol includes M=4 OOK symbols, the first sequence length carried by the first signal has two options, i.e., N seq = 20+5 or N seq = 20, occupying 5 OFDM symbols. When Nseq When N = 20 + 5, the first sequence occupies 25 OOK symbols, of which the number of OOK symbols of the first type is 20 and the number of OOK symbols of the second type is 5. When N seq When N = 20, the first sequence occupies 20 OOK symbols, of which the number of OOK symbols of the first type is 20. The first sequence is as follows, wherein each row represents a first sequence. In addition, the "0", "1", "-1" in the following table can be replaced with each other. Optionally, the "0" in the first sequence in each of the following tables can be replaced with "-1". Optionally, the "0" in the first sequence in each of the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with a sequence length of 20, 1 "1", 3 "0" or "-1" are sent in the M = 4 OOK symbols of the first type, as shown in Table 71, and for the first sequence with a sequence length of 25, 1 "1", 3 "0" or "-1" are sent in the M = 4 OOK symbols of the first type, as shown in Table 72. Table 71 Table 72 For the first sequence with a sequence length of 20, 2 "1", 2 "0" or "-1" are sent in the M = 4 OOK symbols of the first type, as shown in Table 73, and for the first sequence with a sequence length of 25, 2 "1", 2 "0" or "-1" are sent in the M = 4 OOK symbols of the first type, as shown in Table 74. Table 73 Table 74 For example, when M = 4 OOK symbols are included in 1 OFDM symbol, the first sequence length borne by the first signal has two options, i.e. N seq = 24 + 6 or N seq = 24, occupying 6 OFDM symbols. When N seq = 24 + 6, the first sequence occupies 30 OOK symbols, of which the number of OOK symbols of the first type is 24 and the number of OOK symbols of the second type is 6. When N seq = 24, the first sequence occupies 24 OOK symbols, of which the number of OOK symbols of the first type is 24. The first sequences are as follows, where each row represents a first sequence. In addition, the "0", "1", and "-1" in the following tables can be replaced with each other. Alternatively, the "0" in the first sequences in the following tables can be replaced with "-1". Alternatively, the "0" in the first sequences in the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequences with a sequence length of 24, 1 "1", 3 "0" or "-1" are transmitted in the M=4 OOK symbols of the first type, as shown in Table 75, and for the first sequences with a sequence length of 30, 1 "1", 3 "0" or "-1" are transmitted in the M=4 OOK symbols of the first type, as shown in Table 76. Table 75 Table 76 For the first sequences with a sequence length of 24, 2 "1", 2 "0" or "-1" are transmitted in the M=4 OOK symbols of the first type, as shown in Table 77, and for the first sequences with a sequence length of 30, 2 "1", 2 "0" or "-1" are transmitted in the M=4 OOK symbols of the first type, as shown in Table 78. Table 77 Table 78 For example, when M=4 OOK symbols are included in 1 OFDM symbol, the first sequence length borne by the first signal has two options, i.e. N seq = 28 + 7 or N seq = 28, occupying 7 OFDM symbols. When N seq = 28 + 7, the first sequence occupies 35 OOK symbols, of which the number of OOK symbols of the first type is 28, and the number of OOK symbols of the second type is 7. When N seq = 28, the first sequence occupies 28 OOK symbols, of which the number of OOK symbols of the first type is 28. The first sequences are as follows, where each row represents a first sequence. In addition, the "0", "1", and "-1" in the following tables can be replaced with each other. Alternatively, the "0" in the first sequences in the following tables can be replaced with "-1". Alternatively, the "0" in the first sequences in the following tables can be replaced with "1", and the "1" can be replaced with "-1". For the first sequence with sequence length of 28, 1 "1", 3 "0" or "-1" are sent in the M=4 OOK symbols of the first type, as shown in Table 79, and for the first sequence with sequence length of 35, 1 "1", 3 "0" or "-1" are sent in the M=4 OOK symbols of the first type, as shown in Table 80. Table 79 Table 80 For the first sequence with sequence length of 28, 2 "1", 2 "0" or "-1" are sent in the M=4 OOK symbols of the first type, as shown in Table 81, and for the first sequence with sequence length of 35, 2 "1", 2 "0" or "-1" are sent in the M=4 OOK symbols of the first type, as shown in Table 82. Table 81 Table 82 For example, when M=4 OOK symbols are included in 1 OFDM symbol, there are two choices for the first sequence length of the first signal, i.e. N seq = 32 + 8 or N seq = 32, occupying 8 OFDM symbols. When N seq = 32 + 8, the first sequence occupies 40 OOK symbols, in which the number of OOK symbols of the first type is 32 and the number of OOK symbols of the second type is 8. When N seq = 32, the first sequence occupies 32 OOK symbols, in which the number of OOK symbols of the first type is 32. The first sequences are as follows, in which each row represents a first sequence. In addition, "0", "1", "-1" in the following tables can be replaced with each other. Optionally, "0" in the first sequences in the following tables can be replaced with "-1". Optionally, "0" in the first sequences in the following tables can be replaced with "1", and "1" can be replaced with "-1". For the first sequence with sequence length of 32, 1 "1", 3 "0" or "-1" are sent in the M=4 OOK symbols of the first type, as shown in Table 83, and for the first sequence with sequence length of 40, 1 "1", 3 "0" or "-1" are sent in the M=4 OOK symbols of the first type, as shown in Table 84. Table 83 Table 84 For the first sequence with sequence length of 32, 2 "1"s, 2 "0"s or "-1"s are sent in the M=4 OOK symbols of the first type, as shown in Table 85. For the first sequence with sequence length of 40, 2 "1"s, 2 "0"s or "-1"s are sent in the M=4 OOK symbols of the first type, as shown in Table 86. Table 85 Table 86 The following takes M=8, sequence length of length 8+1 or 8, 16+2 or 16, 24+3 or 24, 32+4 or 32 as an example. Exemplarily, when 1 OFDM symbol includes M=8 OOK symbols, the first sequence length borne by the first signal has two choices, i.e. N seq =8+1 or N seq =8, occupying 1 OFDM symbol. When N seq =8+1, the first sequence occupies 9 OOK symbols, in which the number of OOK symbols of the first type is 8 and the number of OOK symbols of the second type is 1. When N seq =8, the first sequence occupies 8 OOK symbols, in which the number of OOK symbols of the first type is 8. The first sequences are as follows, in which each row represents a first sequence. In addition, "0", "1" and "-1" in the following tables can be replaced with each other. Optionally, "0" in the first sequences in the following tables can be replaced with "-1". Optionally, "0" in the first sequences in the following tables can be replaced with "1", and "1" can be replaced with "-1". For the first sequence with sequence length of 8, 1 "1", 7 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 87. For the first sequence with sequence length of 9, 1 "1", 7 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 88. Table 87 Table 88 For the first sequence with a length of 8, the first type of M = 8 OOK symbols send 2 "1"s, 6 "0"s, or "-1", as shown in Table 89. For the first sequence with a length of 9, the first type of M = 8 OOK symbols send 2 "1"s, 6 "0"s, or "-1", as shown in Table 90. Table 89 Table 90 For the first sequence with a length of 8, three "1"s, five "0"s, or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 91. For the first sequence with a length of 9, three "1"s, five "0"s, or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 92. Table 91 Table 92 For the first sequence with a sequence length of 8, four "1", four "0" or "-1" are sent in the M = 8 OOK symbols of the first type, as shown in Table 93. For the first sequence with a sequence length of 9, four "1", four "0" or "-1" are sent in the M = 8 OOK symbols of the first type, as shown in Table 94. Table 93 Table 94 For the first sequence with a length of 9, the first type of M = 8 OOK symbols send 5 "1"s, 3 "0"s, or "-1", as shown in Table 95. Table 95 For example, when one OFDM symbol includes M = 8 OOK symbols, the length of the first sequence carried by the first signal has two options, namely N seq =16+2 or N seq =16, occupying 2 OFDM symbols. When N seq When =16+2, the first sequence occupies 18 OOK symbols, of which 16 are of type 1 OOK symbols and 2 are of type 2 OOK symbols. When N seq When =16, the first sequence occupies 16 OOK symbols, of which the number of OOK symbols of the first type is 16. The first sequences are as follows, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following tables can be replaced by each other. Alternatively, "0" in the first sequences in the following tables can be replaced by "-1". Alternatively, "0" in the first sequences in the following tables can be replaced by "1", and "1" can be replaced by "-1". For the first sequences with a sequence length of 16, 1 "1" and 7 "0" or "-1" are transmitted in the M=8 OOK symbols of the first type, as shown in Table 96, and for the first sequences with a sequence length of 18, 1 "1" and 7 "0" or "-1" are transmitted in the M=8 OOK symbols of the first type, as shown in Table 97. Table 96 Table 97 For the first sequences with a sequence length of 16, 2 "1" and 6 "0" or "-1" are transmitted in the M=8 OOK symbols of the first type, as shown in Table 98, and for the first sequences with a sequence length of 18, 2 "1" and 6 "0" or "-1" are transmitted in the M=8 OOK symbols of the first type, as shown in Table 99. Table 98 Table 99 For the first sequences with a sequence length of 16, 3 "1" and 5 "0" or "-1" are transmitted in the M=8 OOK symbols of the first type, as shown in Table 100, and for the first sequences with a sequence length of 18, 3 "1" and 5 "0" or "-1" are transmitted in the M=8 OOK symbols of the first type, as shown in Table 101. Table 100 Table 101 For the first sequences with a sequence length of 16, 4 "1" and 4 "0" or "-1" are transmitted in the M=8 OOK symbols of the first type, as shown in Table 102, and for the first sequences with a sequence length of 18, 4 "1" and 4 "0" or "-1" are transmitted in the M=8 OOK symbols of the first type, as shown in Table 103. Table 102 Table 103 For the first sequence with sequence length of 16, 5 "1"s, 3 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 104. For the first sequence with sequence length of 18, 5 "1"s, 3 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 105. Table 104 Table 105 For example, when M=8 OOK symbols are included in 1 OFDM symbol, the first sequence length of the first signal has two options, i.e. N seq = 24+3 or N seq = 24, occupying 3 OFDM symbols. When N seq = 24+3, the first sequence occupies 27 OOK symbols, of which the number of OOK symbols of the first type is 24 and the number of OOK symbols of the second type is 3. When N seq = 24, the first sequence occupies 24 OOK symbols, of which the number of OOK symbols of the first type is 24. The first sequences are as follows, wherein each row represents a first sequence. In addition, "0", "1" and "-1" in the following tables can be replaced with each other. Optionally, "0" in the first sequences in the following tables can be replaced with "-1". Optionally, "0" in the first sequences in the following tables can be replaced with "1", and "1" can be replaced with "-1". For the first sequence with sequence length of 24, 1 "1", 7 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 106. For the first sequence with sequence length of 27, 1 "1", 7 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 107. Table 106 Table 107 For the first sequence with sequence length of 24, 2 "1"s, 6 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 108. For the first sequence with sequence length of 27, 2 "1"s, 6 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 109. Table 108 Table 109 For the first sequence with sequence length of 24, 3 "1"s, 5 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 110, and for the first sequence with sequence length of 27, 3 "1"s, 5 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 111. Table 110 Table 111 For the first sequence with sequence length of 24, 4 "1"s, 4 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 112, and for the first sequence with sequence length of 27, 4 "1"s, 4 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 113. Table 112 Table 113 For the first sequence with sequence length of 24, 5 "1"s, 3 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 114, and for the first sequence with sequence length of 27, 5 "1"s, 3 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 115. Table 114 Table 115 For example, when M=8 OOK symbols are included in 1 OFDM symbol, the first sequence length carried by the first signal has two options, i.e. N seq = 32 + 4 or N seq = 32, occupying 4 OFDM symbols. When N seq = 32 + 4, the first sequence occupies 36 OOK symbols, of which the number of OOK symbols of the first type is 32 and the number of OOK symbols of the second type is 4. When N seq = 32, the first sequence occupies 32 OOK symbols, of which the number of OOK symbols of the first type is 32. The first sequences are as follows, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following tables can be replaced with each other. Alternatively, "0" in the first sequences in the following tables can be replaced with "-1". Alternatively, "0" in the first sequences in the following tables can be replaced with "1", and "1" can be replaced with "-1". For the first sequences with a sequence length of 32, 1 "1" and 7 "0"s or "-1"s are transmitted in the M=8 OOK symbols of the first type, as shown in Table 116. For the first sequences with a sequence length of 36, 1 "1" and 7 "0"s or "-1"s are transmitted in the M=8 OOK symbols of the first type, as shown in Table 117. Table 116 Table 117 For the first sequences with a sequence length of 32, 2 "1"s and 6 "0"s or "-1"s are transmitted in the M=8 OOK symbols of the first type, as shown in Table 118. For the first sequences with a sequence length of 36, 2 "1"s and 6 "0"s or "-1"s are transmitted in the M=8 OOK symbols of the first type, as shown in Table 119. Table 118 Table 119 For the first sequences with a sequence length of 32, 3 "1"s and 5 "0"s or "-1"s are transmitted in the M=8 OOK symbols of the first type, as shown in Table 120. For the first sequences with a sequence length of 36, 3 "1"s and 5 "0"s or "-1"s are transmitted in the M=8 OOK symbols of the first type, as shown in Table 121. Table 120 Table 121 For the first sequences with a sequence length of 32, 4 "1"s and 4 "0"s or "-1"s are transmitted in the M=8 OOK symbols of the first type, as shown in Table 122. For the first sequences with a sequence length of 36, 4 "1"s and 4 "0"s or "-1"s are transmitted in the M=8 OOK symbols of the first type, as shown in Table 123. Table 122 Table 123 For the first sequence with the sequence length of 32, 5 "1"s and 3 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 124, and for the first sequence with the sequence length of 36, 5 "1"s and 3 "0"s or "-1"s are sent in the M=8 OOK symbols of the first type, as shown in Table 125. Table 124 Table 125 In an embodiment, the first signal includes M OOK symbols in the time domain, and when M is greater than 1, the lengths of the M OOK symbols satisfy at least one of the following conditions: The sequences in the above Tables 1-125 are described by taking the first sequence as an example, and for the second sequence or the third sequence, the sequences in Tables 1-125 can also be generated. The lengths of the second OOK symbol to the Mth OOK symbol in the M OOK symbols are the same or the difference between the second OOK symbol and the Mth OOK symbol is less than or equal to TH1, where TH1 is a configurable value or a predefined value; The first OOK symbol includes at least the cyclic prefix of the OFDM symbol; The length of the first OOK symbol is the same as the lengths of the other M-1 OOK symbols or the difference between the other M-1 OOK symbols is less than or equal to TH2, where TH2 is a configurable value or a predefined value. Wherein the embodiments of the present application are described by taking M OOK symbols in one OFDM symbol, the first signal can occupy multiple OFDM symbols in the time domain, and each OFDM symbol includes M OOK symbols. That is, when M is greater than 1, the first signal is generated in a special way, and FIG. 9 is a fifth signal generation diagram provided by an embodiment of the present application, in which T i is the length of the (i+1)th OOK time domain symbol, which can be calculated by the number of time domain sampling points. Wherein 0≤i≤M-1, and i is an integer. In FIG. 9, T CP is the number of time domain sampling points occupied by the CP. In an embodiment, the first signal includes M OOK symbols in the time domain, and when M is greater than 1, the time domain expression of the first signal in the M OOK symbols is generated based on the first data (that is, the Q K in the embodiments shown in FIGS. 1-3), and the first data satisfies at least one of the following conditions: The lengths of the second data from the second second data to the Mth second data are the same or the difference between the second second data and the Mth second data is less than or equal to TH3, where TH3 is a configurable value or a predefined value. The length of the first second data is less than or equal to the lengths of the other M-1 second data. The sum of the lengths of the M second data is K, where K is less than or equal to the frequency domain subcarrier number configured by the first signal. The above two cases where M is greater than 1 correspond to the following two cases: 1. The lengths of the M OOK symbols need to satisfy at least one of the following: (1) For the length of the ith OOK symbol, when 1≤i≤M-1, T i are the same or approximately the same; (2) The length of the first OOK symbol is UT0=T0+T CP ; (3) UT0 and T i are the same or approximately the same, where 1≤i≤M-1. N OOK =(N FFT +N CP ) / M N1 OO K=N OOK / N ScalingFactor N2 OOK =(N OOK -N CP ) / N ScalingFactor 2. The data information Q K in the background art is further limited as follows, including at least one of the following: (1) When 1≤i≤M-1, A i are the same or approximately the same; (2) A0=A i -T CP / N ScalingFactor , where T CP / N ScalingFactor may be or i.e. rounding up or rounding down T CP / N ScalingFactor . Where A0+A1+…A i +…+A M-1 =K, K is K in the embodiments shown in FIGS. 1-3. wherein N ScalingFactor is an integer, configurable. Preferably, N ScalingFactor =N FFT / K, or N ScalingFactor =4 or 8 or 16. Wherein N FFT is the number of FFT or IFFT transform points, configurable. In the embodiments of the present application, three sequences, i.e., a first sequence, a second sequence, and a third sequence, and three data, i.e., a first data, a second data, and a third data, are involved. The length configuration of the first sequence, the second sequence, the third sequence, the first data, the second data, and the third data in the frequency domain is described as follows, wherein a fourth data is defined, and the fourth data includes at least one of the first data, the second data, the third data, the first sequence, the second sequence, and the third sequence. In an embodiment, when the subcarrier spacing of the first signal is 30 kHz or 120 kHz, the length of the fourth data is configured according to any of the following configuration modes: The difference between the length of the fourth data when the subcarrier spacing is 15 kHz or 60 kHz and twice the length of the fourth data when the subcarrier spacing of the first signal is 30 kHz or 120 kHz is less than or equal to TH4, wherein TH4 is configurable or a predefined value; that is, the length of the fourth data when the subcarrier spacing is 15 kHz or 60 kHz is twice or approximately twice the length of the fourth data when the subcarrier spacing of the first signal is 30 kHz or 120 kHz. The difference between the length of the fourth data when the subcarrier spacing is 15 kHz or 60 kHz and twice the length of the fourth data when the subcarrier spacing of the first signal is 30 kHz or 120 kHz is less than or equal to TH5, wherein TH5 is configurable or a predefined value; that is, the length of the fourth data when the subcarrier spacing is 15 kHz or 60 kHz is twice or approximately twice the length of the fourth data when the subcarrier spacing of the first signal is 30 kHz or 120 kHz. Preferably, the value of TH4 is 0; and preferably, the value of TH5 is 0. Specifically, when the SCS of the first signal is 30 kHz or 120 kHz, the length of the data W is configurable, wherein 0≤i≤M-1. Then, when the SCS of the first signal is 15 kHz or 60 kHz, the length of the data W i is twice the length of the data W i when the SCS is 30 kHz or 120 kHz; further, when the SCS of the first signal is 15 kHz or 60 kHz, the length of the data Wi W for SCS=30kHz or 120kHz i with 2 repetitions. In an embodiment, when the subcarrier spacing of the first signal configuration is 15kHz or 60kHz, the length of the fourth data is configured according to any one of the following configurations: the length of the fourth data when the subcarrier spacing is 30kHz or 120kHz is a fraction or half of the length of the fourth data when the subcarrier spacing of the first signal configuration is 15kHz or 60kHz; the length of the fourth data when the subcarrier spacing is 30kHz or 120kHz is a first or second half of the length of the fourth data when the subcarrier spacing of the first signal configuration is 15kHz or 60kHz. Specifically, when the SCS of the first signal configuration is 15kHz or 60kHz, the data W can be configured, where 0≤i≤M-1. Then, when the SCS of the first signal configuration is 30kHz or 120kHz, the length of the data W i is a fraction or half of the length of the data W i when the SCS is 15kHz or 60kHz. Further, when the SCS of the first signal configuration is 30kHz or 120kHz, the length of the data W i is a first or second half of the length of the data W i when the SCS is 15kHz or 60kHz. In an embodiment, the interval between the ath element and the a+1th element in one fourth data is P subcarriers. In an embodiment, the value of P is determined by the configured subcarrier spacing size or subcarrier spacing index in frequency domain of the first signal configuration. In an embodiment, the fourth data satisfies at least one of the following: the fourth data with subcarrier spacing 15kHz and M=4 uses the same sequence set or the same sequence length as the fourth data with subcarrier spacing 30kHz and M=2; the fourth data with subcarrier spacing 15kHz and M=2 uses the same sequence set or the same sequence length as the fourth data with subcarrier spacing 30kHz and M=1; the fourth data with subcarrier spacing 15kHz and M=1 is configured with independent sequence set or sequence length; the fourth data with subcarrier spacing 30kHz and M=4 is configured with independent sequence set or sequence length. In an embodiment, the fourth data satisfies at least one of the following: The fourth data configuration when the subcarrier spacing is 30 kHz and M is 4 is the same as the fourth data configuration when the subcarrier spacing is 120 kHz and M is 1. The fourth data configuration when the subcarrier spacing is 15 kHz and M is 4 is the same as the fourth data configuration when the subcarrier spacing is 60 kHz and M is 1. Specifically, the third data configuration configuration of SCS=30, M=4 can be used for SCS=120, M=1. The third data configuration configuration of SCS=15, M=4 can be used for corresponding SCS=60, M=1. When When The second data is The third data is Wherein, 0≤i≤M-1. Preferably, is a ZC sequence, or a sequence composed of a ZC sequence and a cyclic shift element thereof, or a sequence composed of a ZC sequence and a padding element. Preferably, The length when i=0 is smaller than the length when i>0. For example, when the subcarrier spacing SCS configured for the first signal is 30 kHz or 15 kHz, and the frequency domain resource configured therefor is 11 PRBs, a total of 132 subcarriers are included, then, A0+A1+…A i +…+A M-1 The preferred combination of A0, A1, …, A includes at least one of the following: (1) When M=4, A0=27, A1=A2=A3=35, then K=27+35*3=132. (2) When M=2, A0=62, A1=70, then K=62+70=132. (3) When M=4, A0=26, A1=A2=A3=35, then K=26+35*3=131. (4) When M=2, A0=61, A1=70, then K=61+70=131. (5) When M=4, A0=26, A1=A2=A3=34, then K=26+34*3=128. (6) When M=2, A0=60, A1=68, then the total number of SC=60+68=128. (7) When M=4, A0=25, A1=A2+A3=34, then K=25+34*3=127. (8) When M=2, A0=59, A1=68, then K=59+68=127. In an embodiment, the first signal occupies M OOK symbols in at least one OOK symbol in time domain, when M is greater than 1, a time domain expression of the first signal in the M OOK symbols is generated based on the first data, the first data satisfies at least one of the following: In the M second data constituting the first data, elements in the first J1 second data and the last J2 second data are zero elements, wherein J1 and J2 are both integers greater than or equal to 1; In the M second data constituting the first data, elements in the first J1 second data and the last J2 second data are the same; In the M second data constituting the first data, the element in the i-th second data is a zero element or a predefined element, wherein Or Or Or Or Or In the M second data constituting the first data, the element in the i-th second data is a zero element or a predefined element, wherein represents rounding down represents rounding up. Here, the data information Q K mentioned in the generation of the embodiments shown in FIG. 1-FIG. 3 i is further explained, including at least one of the following: The data information sent on the M OOK symbols is S M , S M includes M elements, i.e. the length of S M is M, and is expressed as S M =[s0,s1,s2,s3...s M-1 ]. The Es M is generated based on the element s i in the data information S i . When i≤J1, the elements in Es i are all zero elements; When i≥J2, the elements in Es i are all zero elements; When J1 i is generated according to the background art. In an embodiment, before the first signal is sent, the method further comprises: obtaining fifth data from the first data; and when the fifth data is mapped to the frequency domain subcarriers, an interval between an i-th element and an i+1-th element of K elements of the fifth data is H subcarriers, where 0≤i≤K-2. The first data can be transformed by K-point FFT / DFT to obtain the fifth data. Specifically, the data information Q K is obtained by K-point DFT / FFT operation K = [d0, d1, d2, d3, …, d K-1 ], D K When mapped to the frequency domain subcarriers, the following scheme is adopted: an interval between d i and d i+1 is H subcarriers, where 0≤i≤K-2. The information filled on the H subcarriers is preferably 0 elements. For example, the data information Q K is obtained by K-point DFT / FFT operation K = [d0, d1, d2, d3, …, d K-1 ], D K When mapped to the frequency domain subcarriers, it needs to be mapped to (H+1)*K subcarriers, and the specific mapping manner is as follows In an embodiment, the value of H is determined by the configured frequency domain subcarrier spacing size or frequency domain subcarrier spacing index of the first signal. For example, the carrier spacing index and the corresponding subcarrier spacing size are shown in Table 126. Table 126 The number of H is determined by the value of the frequency domain subcarrier spacing index (μ). For example, when μ=0, the corresponding Δf, that is, the subcarrier spacing (SCS), is SCS=15 kHz, and at this time H=1 For example, when μ=1, the corresponding SCS=30 kHz, and at this time H=0 For example, when μ=2, the corresponding SCS=60 kHz, and at this time H=1 For example, when μ=3, the corresponding SCS=120 kHz, and at this time H=0 For example: When the frequency domain subcarrier spacing size configured by the first signal is SCS=15 kHz, H=1. When the frequency domain subcarrier spacing size configured by the first signal is SCS=30 kHz, H=0. When the frequency domain subcarrier spacing size configured by the first signal is SCS=60 kHz, H=1. When the frequency domain subcarrier spacing size of the first signal configuration is SCS = 120 kHz, H = 0. In an embodiment, the first sequence, the second sequence, and the third sequence mentioned in the above embodiments can also be used for a synchronization sequence (including a preamble, a midamble, and a postamble) of an ambient Internet of Things (Ambient-IoT) downlink or an ambient Internet of Things (Ambient-IoT) uplink (device to reader). Internet of Things devices can be divided into most passive (without a battery), and the content considered in the signaling design and transmission is different from active terminals such as mobile phones. For passive Internet of Things Ambient-IoT (A-IOT) devices, the base station (or excitation source) needs to continuously send a high level to the Internet of Things device function or activate / charge the Internet of Things device. After the Internet of Things device is activated, it receives the downlink signaling sent by the base station and sends uplink signaling to the base station. In the study of A-IOT, the Internet of Things device (A-IoT device) is considered to be a tag, etc. The device type (Device type) is divided into three categories. Type 1 device: power consumption ~ 1 μW, without downlink (DL) or uplink (UL) amplifier, feedback uplink signal through backscatter. Type 2a device: power consumption ≤ a few hundred μW, with DL and / or UL amplifier, feedback uplink signal through backscatter. Type 2b device: power consumption ≤ a few hundred μW, with DL and / or UL amplifier, autonomously generates uplink signal. In the study of A-IOT, the reader that communicates with the A-IoT device is called a reader, and the reader can be a base station or a UE. The UE can be a mobile phone or other 5G terminal device. In A-IoT communication, since the A-IoT device is simple and cannot continuously maintain synchronization between the A-IoT device and the reader, a synchronization sequence may need to be sent for synchronization before each uplink (A-IoT device to reader) / downlink (reader to A-IoT device) communication. FIG. 10 is a structural schematic diagram of a signal sending device provided in an embodiment of the present application, as shown in FIG. 10, the signal sending device provided in the embodiment includes: The generating module 101 is configured to generate a first signal according to at least one first sequence, and the first signal occupies at least one OFDM symbol or at least one OOK symbol in the time domain; and the sending module 102 is configured to send the first signal. The signal sending device provided in the embodiment is arranged at the network side, and is used for executing the signal sending method in the embodiment shown in FIG. 4, and has similar implementation principles and technical effects, which will not be repeated here. FIG. 11 is a structural schematic diagram of a signal sending device provided in the embodiment, as shown in FIG. 11, the signal sending device includes a processor 111, a memory 112, a receiver 113 and a transmitter 114; the number of the processors 111 in the signal sending device can be one or more, and one processor 111 is taken as an example in FIG. 11; the processor 111, the memory 112, the receiver 113 and the transmitter 114 in the signal sending device can be connected through a bus or other manners, and the connection through the bus is taken as an example in FIG. 11. The memory 112 is a computer readable storage medium, which can be used to store software programs, computer executable programs and modules, such as the program instructions / modules (the generating module 101 and the sending module 102) corresponding to the signal sending method in the embodiment of FIG. 2. The processor 111 applies various functions of the signal sending device and data processing by running the software programs, instructions and modules stored in the memory 112, that is, the signal sending method is implemented. The memory 112 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application program required by a function; the data storage area can store data created according to the use of the signal sending device, etc. In addition, the memory 112 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device or other non-volatile solid-state storage device. The receiver 113 is any device / module with data receiving capability or a combination of multiple devices / modules with data receiving capability, and the transmitter 114 is any device / module with data sending capability or a combination of multiple devices / modules with data sending capability. The embodiment of the present application further provides a non-volatile storage medium, and the storage medium includes a stored program, characterized in that the program executes a signal sending method when running, and the method includes: generating a first signal according to at least one first sequence, wherein the first signal occupies at least one OFDM symbol or at least one OOK symbol in the time domain; and sending the first signal. In the embodiment, the storage medium can include but is not limited to: a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk and various program code storage media. Those skilled in the art can understand that all or some of the steps in the method disclosed above, the functional modules / units in the system and the device can be implemented as software, firmware, hardware and their appropriate combinations. In the hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component can have multiple functions, or one function or step can be performed by several physical components in cooperation. Some or all of the components can be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on computer-readable media, which can include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and that can be accessed by a computer. In addition, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and can include any information delivery medium. Although the embodiments disclosed in the present application are as above, the content is only the embodiment adopted for the purpose of facilitating the understanding of the technical solutions of the present application, and is not used to limit the present application. Any person skilled in the art without departing from the core technical solutions disclosed in the present application can make any modification and change in the implementation form and details, but the protection scope of the present application still needs to be limited within the scope defined by the appended claims.

Claims

1. A method for signal transmission, comprising: generating a first signal according to at least one first sequence, wherein the first signal occupies at least one orthogonal frequency division multiplexing (OFDM) symbol or at least one on-off keying (OOK) symbol in time domain; transmitting the first signal.

2. The method of claim 1, wherein, The generating the first signal according to the at least one first sequence comprises: generating a second sequence according to the first sequence; generating the first signal according to the second sequence; wherein the second sequence comprises the first sequence and at least one of: at least one padding element; at least one element in the first sequence.

3. The method of claim 1, wherein, The first signal transmits data information comprising M elements in M OOK symbols; wherein the M OOK symbols occupy resources in one OFDM symbol; wherein M is an integer greater than 0.

4. The method of claim 3, wherein, At least one of the M elements is a non-zero element.

5. The method of claim 3, wherein, A first element and a last element in the M elements carry the same information.

6. The method of claim 3, wherein, The M elements comprise A first type of elements and B second type of elements, and A and B satisfy at least one of: A is the same as B; A and B differ by 1; A and B differ by 2; A and B differ by less than or equal to M / 2; A and B differ by less than or equal to M / 4.

7. The method of claim 6, wherein, A combination of the first type of elements and the second type of elements comprises at least one of: the first type of elements is a zero element, and the second type of elements is a non-zero element; the first type of elements is -1, and the second type of elements is 1. The first type of elements is 0, and the second type of elements is 1.

8. The method of claim 6, wherein, comprises: when M is 4, the number of B is 1; when M is 8, the number of B is 1 or 2.

9. The method of claim 1, wherein, The first sequence comprises a third sequence and at least one of: at least one padding element; at least one element in the third sequence.

10. The method of claim 9, wherein, The first sequence adopts Manchester coding.

11. The method of claim 7, wherein, When the first sequence comprises multiple groups of data information of the M elements, the number of the second type of elements in the multiple groups of data information of the M elements is the same or the difference between the number of the second type of elements in the multiple groups of data information of the M elements is less than or equal to TH0, wherein TH0 is a configurable value or a predefined value.

12. The method of claim 3, wherein, The first sequence satisfies at least one of: Corr1 A,d less than or equal to a first threshold value; Corr2 A,d less than or equal to a second threshold value; |Corr1 A,d | is less than or equal to a 3rd threshold value; |Corr2 A,d | is less than or equal to a fourth threshold value; Corr1 A,d / AutoCorr A is less than or equal to a 5th threshold value; Corr2 A,d / AutoCorr A is less than or equal to a 6th threshold value; |Corr1 A,d / AutoCorr A | is less than or equal to a seventh threshold value; |Corr2 A,d / AutoVCorr A | is less than or equal to an 8th threshold value; wherein, 0 < d < L, L < N A , or 0 < d < L, L < N A ; 0 < d ≤ L, L ≤ NNA, or 0 < d < L, L < N A ; or wherein the first sequence is represented by Seq A , Wherein, the Seq A The length of the Seq A .

13. The method of claim 12, wherein, d takes at least one of: {1}，{1，2}，{1，2，3}，{1，2，3，4}。 14. The method of claim 12, wherein, comprises at least one of: when M = 1, d is {1}; when M = 2, d is {1, 2}; when M = 4, d is {1, 2, 3, 4}.

15. The method according to any one of claims 1 to 14, wherein, A part of elements in the first sequence are transmitted in a first type of OOK symbol, and another part of elements are transmitted in a second type of OOK symbol; wherein a time domain position of the first type of OOK symbol is located in an OFDM symbol, and a data position of the second type of OOK symbol is located in a cyclic prefix of the OFDM symbol.

16. The method of claim 15, wherein, The second type of OOK symbol occupies all or part of time domain resources of the cyclic prefix of the OFDM symbol.

17. The method of claim 15, wherein, The first type of OOK symbol and the second type of OOK symbol occupy the same frequency domain resources.

18. The method of claim 15, wherein, The element carried by the second type of OOK symbol is the same as the element in the first sequence carried by the last one of the M first type of OOK symbols in the corresponding OFDM symbol.

19. The method of claim 15, wherein, The time domain expression of the second type of OOK symbol is generated by: generating the time domain expression of the first length based on the time domain expression of the last one of the M first type of OOK symbols in the corresponding OFDM symbol; or generating the time domain expression of the first length based on the time domain expression of the corresponding OFDM symbol; wherein the first length is less than or equal to the length of the cyclic prefix in the OFDM symbol.

20. The method of claim 15, wherein, When the first signal occupies Y OFDM symbols, 1 OFDM symbol includes M first type of OOK symbols and 1 second type of OOK symbol, the method comprises at least one of: carrying the at least one first sequence by Y*M first type of OOK symbols; carrying the at least one first sequence by Y*M first type of OOK symbols and Y second type of OOK symbols; wherein Y is an integer greater than or equal to 1.

21. The method according to any one of claims 1 to 14, wherein, The first signal comprises M OOK symbols in the at least one OOK symbol in the time domain, when M is greater than 1, the length of the M OOK symbols satisfies at least one of: the length from the second OOK symbol to the Mth OOK symbol in the M OOK symbols is the same or the difference in length between the second OOK symbol and the Mth OOK symbol is less than or equal to TH1, wherein TH1 is a configurable value or a predefined value; the first OOK symbol includes at least the cyclic prefix of the OFDM symbol; the length of the first OOK symbol is the same as the length of the other M-1 OOK symbols or the difference in length between the first OOK symbol and the other M-1 OOK symbols is less than or equal to TH2, wherein TH2 is a configurable value or a predefined value.

22. The method of any one of claims 1-14, wherein, When M is greater than 1, the time domain expression of the first signal in the M OOK symbols is generated based on the first data, and the first data satisfies at least one of: the length from the second second data to the Mth second data in the M second data constituting the first data is the same or the difference in length between the second second data and the Mth second data is less than or equal to TH3, wherein TH3 is a configurable value or a predefined value; the length of the first second data in the M second data constituting the first data is less than or equal to the length of the other M-1 second data; the sum of the lengths of the M second data in the M second data constituting the first data is K, wherein K is less than or equal to the number of frequency domain subcarriers configured by the first signal.

23. The method of claim 22, wherein, The second data is generated based on the third data, and the third data satisfies: the length of the third data corresponding to the first second data is less than or equal to the length of the third data corresponding to the other M-1 second data.

24. The method of claim 1, wherein, The length of the fourth data is configured according to any one of the following configurations when the subcarrier spacing of the first signal configuration is 30 kHz or 120 kHz: The difference between the length of the fourth data when the subcarrier spacing is 15 kHz or 60 kHz and twice the length of the fourth data when the subcarrier spacing of the first signal configuration is 30 kHz or 120 kHz is less than or equal to TH4, where TH4 is a configurable value or a predefined value; The difference between the length of the fourth data when the subcarrier spacing is 15 kHz or 60 kHz and the length after twice repetition of the length of the fourth data when the subcarrier spacing of the first signal configuration is 30 kHz or 120 kHz is less than or equal to TH5, where TH5 is a configurable value or a predefined value; The fourth data includes at least one of the following: first data, second data, third data, first sequence, second sequence, and third sequence.

25. The method of claim 1, wherein, The length of the fourth data is configured according to any one of the following configurations when the subcarrier spacing of the first signal configuration is 15 kHz or 60 kHz: The length of the fourth data when the subcarrier spacing is 30 kHz or 120 kHz is a part or half of the length of the fourth data when the subcarrier spacing of the first signal configuration is 15 kHz or 60 kHz; The length of the fourth data when the subcarrier spacing is 30 kHz or 120 kHz is the first half or the second half of the length of the fourth data when the subcarrier spacing of the first signal configuration is 15 kHz or 60 kHz; The fourth data includes at least one of the following: first data, second data, third data, first sequence, second sequence, and third sequence.

26. The method of claim 24 or 25, wherein, The interval between the a-th element and the a+1-th element in one fourth data is P subcarriers.

27. The method of claim 26, wherein, The value of P is determined by the frequency domain subcarrier spacing size or the frequency domain subcarrier spacing index of the configuration of the first signal.

28. The method of claim 3, wherein, The fourth data satisfies at least one of the following: The fourth data when the subcarrier spacing is 15 kHz and M is 4 uses the same sequence set or the same sequence length as the fourth data when the subcarrier spacing is 30 kHz and M is 2; The fourth data when the subcarrier spacing is 15 kHz and M is 2 uses the same sequence set or the same sequence length as the fourth data when the subcarrier spacing is 30 kHz and M is 1; The fourth data when the subcarrier spacing is 15 kHz and M is 1 is configured with an independent sequence set or sequence length; The fourth data when the subcarrier spacing is 30 kHz and M is 4 is configured with an independent sequence set or sequence length; The fourth data includes at least one of the following: first data, second data, third data, first sequence, second sequence, and third sequence.

29. The method of claim 3, wherein, The fourth data satisfies at least one of the following: The configuration of the fourth data when the subcarrier spacing is 30 kHz and M is 4 is the same as the configuration of the fourth data when the subcarrier spacing is 120 kHz and M is 1; The configuration of the fourth data when the subcarrier spacing is 15 kHz and M is 4 is the same as the configuration of the fourth data when the subcarrier spacing is 60 kHz and M is 1; The fourth data includes at least one of the first data, the second data, the third data, the first sequence, the second sequence, and the third sequence.

30. The method of any one of claims 1-14, wherein, The first signal occupies M OOK symbols in the at least one OOK symbol in the time domain, and when M is greater than 1, a time domain expression of the first signal in the M OOK symbols is generated based on the first data, and the first data satisfies at least one of the following conditions: In the M second data constituting the first data, the elements in the first J1 second data and the last J2 second data are zero elements, where J1 and J2 are integers greater than or equal to 1. In the M second data constituting the first data, the elements in the first J1 second data and the last J2 second data are the same. Among the M second data constituting the first data, the first or or or or or an element in the second data is a zero element or a predefined element, wherein denotes rounding down, represents rounding up.

31. The method of any one of claims 1-14, before the transmitting the first signal, further comprising: obtaining fifth data according to the first data; When mapping the fifth data to frequency domain subcarriers, in K data constituting the fifth data, an interval between an i-th element and an i+1-th element is H subcarriers, where 0≤i≤K-2.

32. The method of claim 31, wherein, The value of H is determined by a configured frequency domain subcarrier interval size or a frequency domain subcarrier interval index of the first signal.

33. A signal transmitting apparatus, comprising: a generating module configured to generate a first signal according to at least one first sequence, wherein the first signal occupies at least one OFDM symbol or at least one OOK symbol in the time domain; a transmitting module configured to transmit the first signal.

34. A signal transmitting device, comprising: a memory configured to store a program; a processor configured to execute the program, and when the program is executed, perform the signal transmitting method according to any one of claims 1-32.

35. A non-volatile storage medium, the storage medium comprising a stored program, and when the program is executed, perform the signal transmitting method according to any one of claims 1-32.

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