Signal sending method and device, equipment and storage medium

Abstract

The invention provides a signal sending method and device, equipment and a storage medium, and the method comprises the steps: generating a first signal according to at least one first sequence, and enabling the first signal to occupy at least one OFDM symbol or at least one OOK symbol in a time domain; and sending the first signal.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and in particular, to a signal sending method, apparatus, device, and storage medium. Background Art

[0002] For the fifth generation mobile communication system (5G), in addition to latency, reliability, and availability, the energy efficiency of user equipment (UE) is also crucial. Currently, 5G devices may need to be charged weekly or daily according to individual usage times. Generally, 5G devices consume dozens 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 battery life is a necessary condition for improving energy efficiency and user experience.

[0003] The power consumption of the UE depends on the configured wake-up cycle length, such as the paging cycle. To meet the battery life requirements, it is expected to use an extended discontinuous reception (eDRX) cycle with a higher value, which results in high latency and is not suitable for such services that require both battery life and low latency. Therefore, the 3rd Generation Partnership Project Release 18 (3GPP Rel-18) considers introducing a low power wake-up signal (LP-WUS) mechanism. 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 on-off keying (OOK) modulation, which is called an OOK-based low power wake-up signal (OOK based LP-WUS).

[0004] Currently, there is no specific determination of the generation and sending method of OOK based LP-WUS.

[0005] Content of the Application

[0006] In view of this, embodiments of this application are expected to provide a signal sending method, apparatus, device, and storage medium.

[0007] In a first aspect, an embodiment of the present application provides a signal sending method, including:

[0008] generating a first signal according to at least one first sequence, where the first signal occupies at least one OFDM symbol or at least one OOK symbol in the time domain;

[0009] sending the first signal.

[0010] In a first aspect, an embodiment of the present application provides a signal sending device, including:

[0011] a generating module configured to generate a first signal according to at least one first sequence, where the first signal occupies at least one OFDM symbol or at least one OOK symbol in the time domain;

[0012] a sending module configured to send the first signal.

[0013] In a first aspect, an embodiment of the present application provides a signal sending device, including:

[0014] a memory configured to store a program;

[0015] a processor configured to execute the program, and when the program is executed, perform the signal sending method according to any implementation manner of the first aspect.

[0016] In a first aspect, an embodiment of the present application provides a non-volatile storage medium, where the storage medium includes a stored program, and when the program runs, it performs the signal sending method according to any implementation manner of the first aspect. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the generation process of the first MC-OOK based LP-WUS;

[0018] Figure 2 is another schematic diagram of the generation process of the first MC-OOK based LP-WUS;

[0019] Figure 3 is a schematic diagram of the generation process of the second MC-OOK based LP-WUS;

[0020] Figure 4 is a flowchart of a signal sending method provided by an embodiment of the present application;

[0021] Figure 5 is a first signal generation schematic diagram provided by an embodiment of the present application;

[0022] Figure 6 is a second signal generation schematic diagram provided by an embodiment of the present application;

[0023] Figure 7 The third signal generation schematic diagram provided by the embodiment of the present application;

[0024] Figure 8 The fourth signal generation schematic diagram provided by the embodiment of the present application;

[0025] Figure 9 The fifth signal generation schematic diagram provided by the embodiment of the present application;

[0026] Figure 10 The structural schematic diagram of a signal sending device provided by the embodiment of the present application;

[0027] Figure 11 The structural schematic diagram of a signal sending device provided by the embodiment of the present application. Detailed implementation manners

[0028] To make the application purpose, technical solution and beneficial effects of the present application clearer and more obvious, the embodiments of the present application will be described below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0029] The low-power wake-up mechanism involves LP-WUS, LP-SS, and LP-Preamble.

[0030] Among them, LP-WUS is used to carry low-power wake-up information.

[0031] The functions of LP-SS include at least one of the following: performing radio resource management (RRM) measurement by detecting LP-SS, performing downlink synchronization by detecting LP-SS, and performing frequency offset correction by detecting LP-SS.

[0032] The functions of LP-Preamble include at least one of the following: performing RRM measurement by detecting LP-Preamble, detecting LP-Preamble for downlink synchronization, and detecting LP-Preamble for frequency offset correction.

[0033] In some embodiments, the transmission of LP-Preamble is before LP-WUS, and the terminal performs downlink synchronization and / or frequency offset correction by detecting LP-Preamble, thereby improving the detection performance of the terminal for detecting LP-WUS.

[0034] The waveforms of the above signals (LP-WUS / LP-SS / LP-Preamble) can be generated by OOK modulation, which is called OOK based LP-WUS / LP-SS / LP-Preamble. In addition, in this application, the above signals can be carried by multiple subcarriers. That is, when the number of subcarriers occupied by OOK based LP-WUS / LP-SS / LP-Preamble in the spectrum is greater than 1, it is called MultipleSubcarrier (MC)-OOK based LP-WUS / LP-SS / LP-Preamble.

[0035] Taking MC-OOK based LP-WUS as an example below, the generation method of MC-OOK based LP-WUS / LP-SS / LP-Preamble will be described.

[0036] Figure 1 It is a schematic diagram of the generation process of the first type of MC-OOK based LP-WUS: This method can generate the time-domain expression forms of M MC-OOK based LP-WUS symbols, where M is greater than or equal to 1, and the generation method includes:

[0037] Step 1: The data information sent on M OOK symbols is S M , define S M = [s 0 , s 1 , s 2 , s 3 ..., s M-1 and the length of S M is M. The data information S M can also be called at least one of the following: coded bit information, coded sequence information, code word information.

[0038] Step 2: Convert S M to data information Q K according to the following formula, where the length of Q K is K, and K is greater than or equal to 1.

[0039]

[0040] Or

[0041]

[0042] Among them, A 0 +A 1 +…A i +…+A M-1 =K.

[0043] Among them, the value of the data can be configured. Among them, 0 ≤ i ≤ M - 1.

[0044] Step 3: Perform a K-point Discrete Fourier Transform (DFT) / Fast Fourier Transform (FFT) operation on the data information Q K to obtain the data information D K =[d 0 , d 1 , d 2 , d 3 ,..., d K-1 .

[0045] Optionally, at least one of the following operations can also be performed on D K :

[0046] Perform an upward circular shift operation on D K , and the size of the circular shift is or or K / 2. Among them, is the ceiling operator, is the floor operator.

[0047] Perform a downward circular shift operation on D K , and the size of the circular shift is or or K / 2. Among them, is the ceiling operator, is the floor operator.

[0048] Perform a left circular shift operation on D K , and the size of the circular shift is or or K / 2. Among them, is the ceiling operator, is the floor operator.

[0049] Perform a right circular shift operation on D K , and the size of the circular shift is or or K / 2. Among them, is the ceiling operator, and is the floor operator.

[0050] Perform the FFTSHIFT operation on D K , where FFTSHIFT is a function used to move the zero-frequency component of the Fourier transform to the center of the spectrum. For the vector X, FFTSHIFT(X) swaps the left and right halves of X or swaps the upper and lower halves of X. For the matrix X, FFTSHIFT(X) swaps the first and third quadrants, and the second and fourth quadrants.

[0051] Step 4: Fill the data information D K onto K subcarriers in the frequency domain; when the overall frequency-domain bandwidth of the system includes N subcarriers, then perform the N-point Inverse Discrete Fourier Transform (IDFT) / Inverse Fast Fourier Transform (IFFT) operation on the filled data on the N subcarriers to obtain the time-domain data T of N sampling points N = [t 0 , t 1 , t 2 , t 3 ,..., t N-1 . Where N is greater than or equal to 1.

[0052] Among them, T N = [t 0 , t 1 , t 2 , t 3 ,..., t N-1 is the sampled point data of M OOK time-domain symbols.

[0053] Among them, [t 0 , t 1 , t 2 , t 3 ,..., t N / M-1 is the sampled point data of the first OOK time-domain symbol among M OOK time-domain symbols, [t N / M , t N / M+1 ,..., t 2N / M-1 is the sampled point data of the second OOK time-domain symbol among M OOK time-domain symbols, and so on, [t (M-1)N / M , t (M-1)N / M+1 ,..., t N-1 is the sampled point data of the Mth OOK time-domain symbol among M OOK time-domain symbols.

[0054] Optionally, before performing the N-point IDFT / IFFT operation, at least one of the following operations can also be performed on the data filled on the N subcarriers:

[0055] Perform a cyclic shift upward operation on the data, and the size of the cyclic shift is Or Or N / 2. Wherein, Is the ceiling operator, Is the floor operator.

[0056] Perform a cyclic shift downward operation on the data, and the size of the cyclic shift is Or Or N / 2. Wherein, Is the ceiling operator, Is the floor operator.

[0057] Perform a cyclic shift leftward operation on the data, and the size of the cyclic shift is Or Or N / 2. Wherein, Is the ceiling operator, Is the floor operator.

[0058] Perform a cyclic shift rightward operation on the data, and the size of the cyclic shift is Or Or N / 2. Wherein, Is the ceiling operator, Is the floor operator.

[0059] Perform the FFTSHIFT operation on the data, where FFTSHIFT is a function used to move the zero-frequency component of the Fourier transform to the center of the spectrum. For the vector X, FFTSHIFT(X) exchanges the left and right halves of X or exchanges the upper and lower halves of X. For the matrix X, FFTSHIFT(X) exchanges the first and third quadrants, and the second and fourth quadrants.

[0060] Step 5: The time-domain data T of N sampling points N =[t 0 ,t 1 ,t 2 ,t 3 ,...,t N-1 Before transmission, an operation of adding a cyclic prefix (CP) also needs to be performed, that is, copying the information of Ncp sampling points at the tail of the time-domain data T N Of the N sampling points to the time-domain data T of the N sampling points NRemove the header to form time-domain data of (N + Ncp) sampling points, and then send the data of these (N + Ncp) sampling points.

[0061] In addition, 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, the process of step 4 is modified as follows:

[0062] (1) Process the data information D K = [d 0 , d 1 , d 2 , d 3 ,..., d K-1 to convert D K into E K1 , where E K1 = [e 0 , e 1 , e 2 , e 3 ,..., e K1-1

[0063] Optionally, at least one of the following operations can also be performed on E K1 :

[0064] Perform an upward cyclic shift operation on D EK1 , and the size of the cyclic shift is or or K1 / 2. Among them, is the ceiling operator, is the floor operator;

[0065] Perform a downward cyclic shift operation on E K1 , and the size of the cyclic shift is or or K1 / 2. Among them, is the ceiling operator, is the floor operator;

[0066] Perform a left cyclic shift operation on E K1 , and the size of the cyclic shift is or or K1 / 2. Among them, is the ceiling operator, is the floor operator;

[0067] Perform a right cyclic shift operation on E K1 , and the size of the cyclic shift is or or K1 / 2. Among them, is the ceiling operator, is the floor operator;

[0068] Perform the FFTSHIFT operation on E K1 where FFTSHIFT is a function used to move the zero-frequency component of the Fourier transform to the center of the spectrum. For the vector X, FFTSHIFT(X) exchanges the left and right halves of X or exchanges the upper and lower halves of X. For the matrix X, FFTSHIFT(X) exchanges the first and third quadrants, and the second and fourth quadrants.

[0069] (2) Fill the data information E K1 onto K1 subcarriers in the frequency domain;

[0070] (3) When the overall frequency-domain bandwidth of the system includes N subcarriers, perform the N-point IDFT / IFFT operation on the filled data on the N subcarriers to obtain the time-domain data T of N sampling points N =[t 0 ,t 1 ,t 2 ,t 3 ,...,t N-1 . Among them, N is greater than or equal to 1.

[0071] Among them, T N =[t 0 ,t 1 ,t 2 ,t 3 ,...,t N-1 is the sampling point data of M OOK time-domain symbols.

[0072] Among them, [t 0 ,t 1 ,t 2 ,t 3 ,...,t N / M-1 is the sampling point data of the first OOK time-domain symbol among 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 among 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 among M OOK time-domain symbols.

[0073] Optionally, before performing the N-point IDFT / IFFT operation, at least one of the following operations can also be performed on the data filled on the N subcarriers:

[0074] Perform an upward circular shift operation on the data, and the size of the circular shift is Or Or N / 2. Wherein, Is the ceiling operator, Is the floor operator;

[0075] Perform a downward circular shift operation on the data, and the size of the circular shift is Or Or N / 2. Wherein, Is the ceiling operator, Is the floor operator;

[0076] Perform a left circular shift operation on the data, and the size of the circular shift is Or Or N / 2. Wherein, Is the ceiling operator, Is the floor operator;

[0077] Perform a right circular shift operation on the data, and the size of the circular shift is Or Or N / 2. Wherein, Is the ceiling operator, Is the floor operator;

[0078] Perform the FFTSHIFT operation on the data, where FFTSHIFT is a function used to move the zero-frequency component of the Fourier transform to the center of the spectrum. For the vector X, FFTSHIFT(X) exchanges the left and right halves of X or exchanges the upper and lower halves of X. For the matrix X, FFTSHIFT(X) exchanges the first and third quadrants, and the second and fourth quadrants.

[0079] The modified MC-OOK based LP-WUS generation process is as Figure 2 Shown, Figure 2 Is another generation process schematic diagram of the first type of MC-OOK based LP-WUS.

[0080] Figure 3 Is the generation process schematic diagram of the second type of MC-OOK based LP-WUS. This method can generate the time-domain expression form of M MC-OOK based LP-WUS symbols, where M is greater than or equal to 1, and the generation methods include:

[0081] Step 1: The data information transmitted on M OOK symbols is S M , define S M = [s 0 , s 1 , s 2 , s 3 ..., s M-1 and the length is M.

[0082] Step 2: Generate the data information M from S according to the following formula

[0083]

[0084] Or

[0085]

[0086] where, where, is an integer greater than or equal to 1. Further, is preferably N. Where, N is the number of sub - carriers included in the system bandwidth.

[0087] where, the value of the data can be configured. Where, 0 ≤ i ≤ M - 1.

[0088] Step 3: Pass the data information through the first processing module to obtain the data information D K = [d 0 , d 1 , d 2 , d 3 ,..., d K-1 T . Where, the first processing module includes at least one of the following operations:

[0089] (1) Generate the data information D from K

[0090]

[0091] where, Preferably, is the generalized inverse matrix of F. Where, (X) -1 is the operation of finding the inverse matrix of 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. Where, F is the matrix composed of K column elements in the IDFT Matrix, and the matrix F is ​A matrix of row K and column

[0092] Among them, the expression of the IDFT Matrix is

[0093]

[0094] Or

[0095]

[0096] Furthermore, the K column elements in the IDFT Matrix that make up F are in the position among the column elements of the IDFT Matrix, at least determined by the data information D K filled into K subcarrier positions or subcarrier indices in the frequency domain.

[0097] (2) Perform at least one of the following operations on D K :

[0098] Perform an upward circular shift operation on D K , and the size of the circular shift is Or Or K / 2. Among them, is the ceiling operator, is the floor operator;

[0099] Perform a downward circular shift operation on D K , and the size of the circular shift is Or Or K / 2. Among them, is the ceiling operator, is the floor operator;

[0100] Perform a left circular shift operation on D K , and the size of the circular shift is Or Or K / 2. Among them, is the ceiling operator, is the floor operator;

[0101] Perform a right circular shift operation on D K , and the size of the circular shift is Or Or K / 2. Among them, is the ceiling operator, is the floor operator;

[0102] Perform an operation on D KPerform the FFTSHIFT operation, where FFTSHIFT is a function used to move the zero-frequency component of the Fourier transform to the center of the spectrum. For vector X, FFTSHIFT(X) exchanges the left and right halves of X or exchanges the upper and lower halves of X. For matrix X, FFTSHIFT(X) exchanges the first and third quadrants and the second and fourth quadrants.

[0103] Step 4: Fill the data information D K onto K subcarriers in the frequency domain; when the overall frequency-domain bandwidth of the system includes N subcarriers, perform an N-point IDFT / IFFT operation on the filled data on the N subcarriers to obtain the time-domain data T of N sampling points N = [t 0 , t 1 , t 2 , t 3 ,..., t N-1 . Among them, N is greater than or equal to 1.

[0104] Among them, T N = [t 0 , t 1 , t 2 , t 3 ,..., t N-1 is the sampling point data of M OOK time-domain symbols.

[0105] Among them, [t 0 , t 1 , t 2 , t 3 ,..., t N / M-1 is the sampling point data of the first OOK time-domain symbol among 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 among 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 among M OOK time-domain symbols.

[0106] Step 5: The time-domain data T of N sampling points N = [t 0 , t 1 , t 2 , t 3 ,..., t N-1 also needs to perform the CP addition operation before transmission, that is, the time-domain data T of N sampling points NCopy the Ncp sampling point information at the tail to the time-domain data T of N sampling points N To the head to form time-domain data of (N + Ncp) sampling points, and then send the data of these (N + Ncp) sampling points.

[0107] In addition, 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, the process of step 4 is as follows:

[0108] (1) Process the data information D K =[d 0 ,d 1 ,d 2 ,d 3 ,...,d K-1 , and convert D K into E K1 , where E K1 =[e 0 ,e 1 ,e 2 ,e 3 ,...,e K1-1 ;

[0109] (2) Fill the data information E K1 onto K1 subcarriers in the frequency domain;

[0110] (3) When the overall frequency-domain bandwidth of the system includes N subcarriers, perform N-point IDFT / IFFT operations on the filled data on the N subcarriers to obtain the time-domain data T N =[t 0 ,t 1 ,t 2 ,t 3 ,...,t N-1 . Among them, N is greater than or equal to 1.

[0111] Among them, T N =[t 0 ,t 1 ,t 2 ,t 3 ,...,t N-1 is the sampling point data of M OOK time-domain symbols.

[0112] Among them, [t 0 ,t 1 ,t 2 ,t 3 ,...,t N / M-1is the sampling point data of the first OOK time-domain symbol among 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 among 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 among M OOK time-domain symbols.

[0113] In addition, the embodiment of the present application further supplements the Figures 1-3 shown MC-OOK based LP-WUS generation method as follows: Process the data information S M through the following Method 1 or Method 2 to obtain the data information Q K or the data information

[0114] Method 1: The data information sent on M OOK symbols is S M , S M includes M elements, that is, the length of S M is M, denoted as S M = [s 0 , s 1 , s 2 , s 3 ..., s M-1 .

[0115] Step 1: Generate Es M based on the element s i in the data information S i .

[0116] Exemplarily, Es i can satisfy the following formula:

[0117]

[0118] where x i = 0 or x i = s i , y i = 0 or y i = s i .

[0119] Step 2: Generate the data information Q i based on Es K or the data information

[0120] where Q K = [Es 0 , Es1 ,...,Es M-1 ,

[0121] Q K has a length of K, where K is greater than or equal to 1. Exemplarily, K can be the number of subcarriers occupied by LP-WUS / LP-SS / LP-Preamble in the frequency domain.

[0122] It should be noted that the number of subcarriers corresponding to the guard bandwidth configured by LP-WUS / LP-SS / LP-Preamble in the frequency domain is not counted in the K subcarriers.

[0123] has a length of where is an integer greater than or equal to 1. Exemplarily, can take the value of N. Here, N is the number of subcarriers included in the system bandwidth.

[0124] Method 2: The data information sent on M OOK symbols is S M , S M includes M elements, that is, S M has a length of M, denoted as S M = [s 0 , s 1 , s 2 , s 3 ..., s M-1 .

[0125] Step 1: Generate Es M based on the element s i in the data information S i .

[0126] Exemplarily, Es i can satisfy the following formula:

[0127]

[0128] where or is the B i elements in, for example can be the last B i elements in, 0 ≤ b i ≤ B i - 1.

[0129] or is the C ini elements, such as can be the leading C in i elements, 0 ≤ c i ≤ C i - 1.

[0130] Among them, the data can be configured, 0 ≤ i ≤ M - 1.

[0131] In some embodiments, the data consists of at least one of the following:

[0132] (1) A sequence of length

[0133] (2) A sequence of length is for the first elements in or 0 elements or padding elements, where the padding elements can be any predefined elements.

[0134] (3) A sequence of length is for the last elements in or 0 elements or padding elements.

[0135] Exemplarily, the sequence can be a binary random sequence, such as a ZC sequence (Zadoff - Chu), a maximum length linear feedback shift register sequence (M sequence), a pseudo noise sequence (PN sequence), and the sequence can also be a repetition of a binary random sequence.

[0136] In some embodiments, the data can be a combination of the above sequences, for example:

[0137]

[0138] Exemplarily, the data can also be obtained by processing based on the elements of the above sequences. Taking as an example, one of its elements is​ where 0 ≤ a ≤ A i -1, and an element can be multiplied by and / or divided by and / or added to and / or subtracted from a further element.

[0139] Step 2: Generate data information Q based on Es i or data information K

[0140] where Q K = [Es 0 , Es 1 ,..., Es M-1 ,

[0141] The length of Q K is K, where K is greater than or equal to 1. Exemplarily, K can be the number of subcarriers occupied by LP-WUS / LP-SS / LP-Preamble in the frequency domain.

[0142] It should be noted that the number of subcarriers corresponding to the guard bandwidth configured by LP-WUS / LP-SS / LP-Preamble in the frequency domain is not counted among the K subcarriers.

[0143] The length of where is an integer greater than or equal to 1. Exemplarily, can take the value of N. Where N is the number of subcarriers included in the system bandwidth.

[0144] It should be pointed out that the embodiments of the present application can learn from or refer to each other. For example, for the same or similar steps, the method embodiments, system embodiments, and device embodiments can all refer to each other without limitation.

[0145] Figure 4 is a flowchart of a signal sending method provided by an embodiment of the present application. As Figure 4 shown, the signal sending method provided by this embodiment includes:

[0146] Step S410, generate a first signal according to at least one first sequence, where the first signal occupies at least one OFDM symbol or at least one OOK symbol in the time domain.

[0147] The signal sending method provided by this embodiment is used to generate any one of the signals of LP-WUS, LP-SS, and LP-Preamble. LP-WUS, LP-SS, and LP-Preamble can be based on Figures 1-3 ​Generated in any way. LP-WUS, LP-SS, and LP-Preamble can be generated by the base station.

[0148] In this embodiment, a 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 the time domain. In order for the first signal to occupy at least one OFDM symbol or at least one OOK symbol in the time domain, the first sequence needs to satisfy certain characteristics.

[0149] For example: when the first sequence is a binary sequence with a length of 16, such as 1010 1010 1010 1010, and at this time M = 4, the binary sequence is divided into 4 parts, namely Part0 =

[1010] , Part1 =

[1010] , Part2 =

[1010] , Part3 =

[1010] . Each Part is the Figures 1-3 data information S in the illustrated embodiment M , and then use Figures 1-3 the method shown to generate the time-domain expression forms corresponding to 4 OOK symbols. That is, the transmission time-domain expression of the first signal in one OFDM symbol or 4 OOK symbols.

[0150] Step S420, transmit the first signal.

[0151] After the first signal is generated, the first signal can be transmitted. Since the first signal is generated according to 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 the time domain, by designing the first sequence, the first signal can occupy very few OFDM symbols or OOK symbols in the time domain. Then the terminal only needs to detect the first signal in the time domain corresponding to a specific few symbols, greatly reducing the power consumption required for the terminal to detect the wake-up signal.

[0152] In an embodiment of the present application, generating a first signal according to at least one first sequence includes: generating a second sequence according to the first sequence; and then generating a 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; at least one element in the first sequence. That is, first generate a second sequence according to the first sequence, and then generate a first signal according to the second sequence. The second sequence can be generated by adding at least one padding element to the first sequence, or by repeating at least one element in the first sequence.

[0153] Figure 5 This is the first signal generation schematic diagram provided by the embodiment of the present application. For exampleFigure 5 As shown, the first signal transmission occupies N + 4 OOK symbols. Among them, N OOK symbols (OOK 0 to OOK(N - 1)) carry the first sequence information. The OOK symbol X0 and the OOK symbol X1 carry the information of the last 2 elements in the first sequence or the information of 2 padding elements. The OOK symbol Y0 and the OOK symbol Y1 carry the information of the first 2 elements in the first sequence or the information of 2 padding elements. Figure 6 This is the second signal generation schematic diagram provided by the embodiment of the present application. As Figure 6 shown, the first signal transmission occupies N + 2 OOK symbols. Among them, N OOK symbols (OOK 0 to OOK(N - 1)) carry the first sequence information. The OOK symbol X0 and the OOK symbol X1 carry the information of the last 2 elements in the first sequence or the information of 2 padding elements. After the first information, a time interval is further configured, and its length can be configured. Preferably, the time interval length is at least one OOK symbol or at least one OFDM symbol.

[0154] In one embodiment, the first signal transmits data information including M elements in M OOK symbols; among them, the resources occupied by the M OOK symbols are within one OFDM symbol; where M is an integer greater than 0. The data signal is, for example, S M , S M = [s 0 , s 1 , s 2 , s 3 ..., s M-1 . The data information S M = [s 0 , s 1 , s 2 , s 3 ..., s M-1 can be partial elements of the first sequence or the second sequence. Some OFDM symbols occupied by the first signal include M OOK symbols, and other OFDM symbols may not have M OOK symbols. In one embodiment, at least one of the M elements included in the M OOK symbols is a non - zero element.

[0155] In one embodiment, the first element and the last element among the M elements transmitted in the M OOK symbols carry the same information.

[0156] In one embodiment, the above - mentioned M elements include A first - type elements and B second - type elements, and A and B satisfy at least one of the following:

[0157] A is the same as B;

[0158] A differs from B by 1;

[0159] The difference between A and B is 2;

[0160] The difference between A and B is less than or equal to M / 2; where M / 2 can be Or That is, rounding up or down M / 2.

[0161] The difference between A and B is less than or equal to M / 4; where M / 4 can be Or That is, rounding up or down M / 4.

[0162] Among them, the combination of the first type of element and the second type of element includes at least one of the following:

[0163] The first type of element is a zero element, and the second type of element is a non-zero element;

[0164] The first type of element is -1, and the second type of element is 1.

[0165] The first type of element is 0, and the second type of element is 1.

[0166] In one embodiment, when M is 4, the number of B is 1; when M is 8, the number of B is 1 or 2.

[0167] For example: when M = 4, S M Is at least one of the following:

[0168] [1 0 0 0], [0 1 0 0], [0 0 1 0], [0 0 0 1],

[0169] When M = 8, S M Is at least one of the following:

[0170] [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],

[0171] When M = 8, S M Is at least one of the following:

[0172] [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],

[0173] When M = 8, S M Is at least one of the following:

[0174] [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 01],

[0175] When M = 8, S M is at least one of the following:

[0176] [1 0 0 0 0 0 0 0], [0 0 0 1 0 0 0 0], [0 0 0 0 0 0 1 0]

[0177] When M = 8, S M is at least one of the following:

[0178] [1 0 0 0 0 0 0 0], [0 0 0 0 1 0 0 0]

[0179] In the above examples, "1" can also be changed to other non - zero elements. In the above examples, "0" can be converted to "-1". In the above examples, "1" can be converted to "0", and "0" can be converted to "-1".

[0180] In one embodiment, the first sequence includes 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 by the third sequence, the first sequence can be directly the third sequence, or can be composed of the third sequence and at least one padding element, and the first sequence can also be composed of the third sequence and at least one cyclic shift element; the cyclic shift element is an element in the third sequence.

[0181] It should be noted that the following description of the first sequence also applies to the second sequence or the third sequence.

[0182] In one embodiment, the first sequence adopts Manchester coding.

[0183] The Manchester coding rule is:

[0184] When the bit signal is 0, the encoded information is 10; when the bit signal is 1, the encoded information is 01. For example, in the embodiments of the present application, when the first sequence is 10101010, and each element adopts Manchester coding, the first sequence is transformed into 01 10 01 10 01 10 01 10.

[0185] In one embodiment, when the first sequence includes multiple sets of data information of M elements, the number of second - type elements in the multiple sets of data information of M elements is the same, or the difference in the number of second - type elements in the multiple sets of data information of M elements is less than or equal to TH0, where the value of TH0 is configurable or a predefined value.

[0186] That is, for the first sequence, when it includes multiple S M =[s 0 ,s 1 ,s 2 ,s 3 ...,s M-1 , the number of second - type elements in the multiple S M is the same. The first sequence is sent in LP - WUS or LP - SS or LP - Preamble, which occupies multiple OFDM symbols, and one OFDM symbol includes M OOKs. Then it can be considered that the first sequence is allocated to multiple sets of {M OOK symbols}.

[0187] In one embodiment, the first sequence satisfies at least one of the following:

[0188] When d > 0, Corr1 A,d is less than or equal to the first threshold;

[0189] When d > 0, Corr2 A,d is less than or equal to the second threshold;

[0190] When d > 0, |Corr1 A,d | is less than or equal to the third threshold;

[0191] When d > 0, |Corr2 A,d | is less than or equal to the fourth threshold;

[0192] When d > 0, Corr1 A,d / AutoCorr A is less than or equal to the fifth threshold;

[0193] When d > 0, Corr2 A,d / AutoCorr A is less than or equal to the sixth threshold;

[0194] When d > 0, |Corr1 A,d / AutoCorr A | is less than or equal to the seventh threshold;

[0195] When d > 0, |Corr2 A,d / AutoCorr A | is less than or equal to the eighth threshold;

[0196] Among them,

[0197]

[0198] or

[0199]

[0200] or

[0201] or

[0202] Among them, the first sequence is represented by Seq A and Seq A = [a 0 , a 1 , a 2 , a 3 ..., a NA-1 , where the length of Seq A is N A .

[0203] Preferably, N A = M * (the number of OFDM symbols occupied by the first signal).

[0204] Preferably, the elements in Seq A can be 0 and 1 or 1 and -1.

[0205] In one embodiment, the value of d is at least one of the following: {1}, {1, 2}, {1, 2, 3}, {1, 2, 3, 4}.

[0206] Optionally, when M = 1, d is {1}; when M = 2, d is {1, 2}; when M = 4, d is {1, 2, 3, 4}.

[0207] Preferably, when M = 2, d is 1 or 2 consecutive ones starting from 1 in {1, 2}.

[0208] Preferably, when M = 4, d is 1 or 2 or 3 or 4 consecutive ones starting from 1 in {1, 2, 3, 4}.

[0209] The following takes M = 2, and the sequence lengths are 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 as an example for illustration. It should be noted that the following sequences are not limited to being used when M = 2, and the following sequences can also be used when M is other values.

[0210] Exemplarily, when there are M = 2 OOK symbols in one OFDM symbol, the length N of the first sequence carried by the first signal seq = 8, occupying 4 OFDM symbols, that is, a total of 8 OOK symbols are occupied. The first sequence is as follows in the table, where each row represents a first sequence. Additionally, the "0", "1", and "-1" in the following table can be replaced with each other.

[0211] Optionally, the "0" in the first sequence in each of the following tables can be replaced with "-1".

[0212] Optionally, the "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, the "1" can be replaced with "-1".

[0213] For the first sequence with a length of 8, 1 "1", 1 "0", or "-1" is sent in M = 2 OOK symbols, as shown in Table 1.

[0214] Table 1

[0215] 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 1 -1 -1 1 1 -1 -1 1 -1 1 1 -1 -1 1 1 -1

[0216] Taking the 6th row in Table 1 as an example, the first sequence includes a total of 4 groups of 2 consecutive elements: [1, -1], [-1, 1], [1, -1], [-1, 1]. The elements in each group are sent in the 2 OOK symbols corresponding to one OFDM symbol.

[0217] For the first sequence with a length of 10, 1 "1", 1 "0", or "-1" is sent in M = 2 OOK symbols, as shown in Table 2.

[0218] Table 2

[0219] 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1

[0220] Taking the 7th row in Table 2 as an example, the first sequence includes a total of 5 groups of 2 consecutive elements: [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1]. The elements in each group are sent in the 2 OOK symbols corresponding to one OFDM symbol.

[0221] For the first sequence with a length of 12, 1 "1", 1 "0", or "-1" is sent in M = 2 OOK symbols, as shown in Table 3.

[0222] Table 3

[0223]

[0224]

[0225] Taking the 8th row in Table 3 as an example, the first sequence includes a total of 6 groups of 2 consecutive elements: [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1]. The elements in each group are transmitted in 2 OOK symbols corresponding to one OFDM symbol.

[0226] For the first sequence with a length of 14, M = 1 "1", 1 "0", or " -1" is transmitted in 2 OOK symbols, as shown in Table 4.

[0227] Table 4

[0228] 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 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 0 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 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1

[0229] Taking the 9th row in Table 4 as an example, the first sequence includes a total of 7 groups of 2 consecutive elements: [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1]. The elements in each group are transmitted in 2 OOK symbols corresponding to one OFDM symbol.

[0230] For the first sequence with a length of 16, M = 1 "1", 1 "0", or " -1" is transmitted in 2 OOK symbols, as shown in Table 5.

[0231] Table 5

[0232] 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 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 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 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1

[0233] Taking the 10th row in Table 5 as an example, the first sequence includes a total of 8 groups of 2 consecutive elements: [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1]. The elements in each group are transmitted in 2 OOK symbols corresponding to one OFDM symbol.

[0234] For the first sequence with a length of 18, M = 1 "1", 1 "0", or " -1" is transmitted in 2 OOK symbols, as shown in Table 6.

[0235] Table 6

[0236] 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 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 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 1 0 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1

[0237] Taking the 11th row in Table 6 as an example, the first sequence includes a total of 9 groups of 2 consecutive elements: [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1]. The elements in each group are transmitted in 2 OOK symbols corresponding to one OFDM symbol.

[0238] For the first sequence with a length of 20, out of M = 2 OOK symbols, 1 "1", 1 "0", or " - 1" is sent, as shown in Table 7.

[0239] Table 7

[0240] 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 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 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 1 0 1 0 1 0 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1

[0241] Taking the 12th row in Table 7 as an example, the first sequence includes a total of 10 groups of 2 consecutive elements: [1, - 1], [- 1, 1], [1, - 1], [- 1, 1], [1, - 1], [- 1, 1], [1, - 1], [- 1, 1], [1, - 1], [- 1, 1]. The elements in each group are sent in 2 OOK symbols corresponding to one OFDM symbol.

[0242] For the first sequence with a length of 22, out of M = 2 OOK symbols, 1 "1", 1 "0", or " - 1" is sent, as shown in Table 8.

[0243] Table 8

[0244] 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 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 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 1 0 1 0 1 0 1 0 1 0 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1

[0245] Taking the 13th row in Table 8 as an example, the first sequence includes a total of 11 groups of 2 consecutive elements: [1, - 1], [- 1, 1], [1, - 1], [- 1, 1], [1, - 1], [- 1, 1], [1, - 1], [- 1, 1], [1, - 1], [- 1, 1], [1, - 1]. The elements in each group are sent in 2 OOK symbols corresponding to one OFDM symbol.

[0246] For the first sequence with a length of 24, out of M = 2 OOK symbols, 1 "1", 1 "0", or " - 1" is sent, as shown in Table 9.

[0247] Table 9

[0248] 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 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 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 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1

[0249] Taking the 14th row in Table 9 as an example, the first sequence includes a total of 12 groups of 2 consecutive elements: [1, - 1], [- 1, 1], [1, - 1], [- 1, 1], [1, - 1], [- 1, 1], [1, - 1], [- 1, 1], [1, - 1], [- 1, 1], [1, - 1], [- 1, 1]. The elements in each group are sent in 2 OOK symbols corresponding to one OFDM symbol.

[0250] For the first sequence with a length of 26, out of M = 2 OOK symbols, 1 "1", 1 "0", or " - 1" is sent, as shown in Table 10.

[0251] Table 10

[0252] 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 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 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 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1

[0253] Taking the 15th row in Table 10 as an example, the first sequence includes a total of 13 groups of consecutive 2 elements: [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1]. The elements in each group are sent in 2 OOK symbols corresponding to one OFDM symbol.

[0254] For the first sequence with a length of 28, M = send 1 "1", 1 "0" or "-1" in 2 OOK symbols, as shown in Table 11.

[0255] Table 11

[0256]

[0257]

[0258] Taking the 16th row in Table 11 as an example, the first sequence includes a total of 14 groups of consecutive 2 elements: [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1]. The elements in each group are sent in 2 OOK symbols corresponding to one OFDM symbol.

[0259] For the first sequence with a length of 30, M = send 1 "1", 1 "0" or "-1" in 2 OOK symbols, as shown in Table 12.

[0260] Table 12

[0261] 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 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 0 1 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 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 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 1 0 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 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 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1

[0262] Taking the 17th row in Table 12 as an example, the first sequence includes a total of 15 groups of consecutive 2 elements: [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [1, -1]. The elements in each group are sent in 2 OOK symbols corresponding to one OFDM symbol.

[0263] For the first sequence with a sequence length of 32, out of M = 2 OOK symbols, 1 "1", 1 "0", or "-1" is sent, as shown in Table 13.

[0264] Table 13

[0265]

[0266]

[0267] Taking the 18th row in Table 13 as an example, the first sequence includes a total of 16 groups of consecutive 2 elements: [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1], [1, -1], [-1, 1]. The elements in each group are sent in 2 OOK symbols corresponding to one OFDM symbol.

[0268] Below, taking M = 4 and sequence lengths of 8, 12, 16, 20, 24, 28, 32 as examples for illustration, it should be noted that the following sequences are not limited to being used when M = 4, and the following sequences can also be used when M is other values.

[0269] Exemplarily, when there are M = 4 OOK symbols in one OFDM symbol, the length N of the first sequence carried by the first signal seq = 8, occupying 2 OFDM symbols, that is, a total of 8 OOK symbols are occupied. The first sequence is as follows in the table, where each row represents a first sequence. Additionally, the "0", "1", and "-1" in the following table can be replaced with each other.

[0270] Optionally, the "0" in the first sequence in each of the following tables can be replaced with "-1".

[0271] Optionally, the "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, the "1" can be replaced with "-1".

[0272] For the first sequence with a sequence length of 8, out of M = 4 OOK symbols, 1 "1", 3 "0", or "-1" is sent, as shown in Table 14.

[0273] Table 14

[0274]

[0275]

[0276] Taking the first row in Table 14 as an example, the first sequence includes a total of 2 groups of 4 consecutive elements, namely [1, -1, -1, -1] and [1, -1, -1, -1]. The elements in each group are sent in 4 OOK symbols corresponding to one OFDM symbol.

[0277] For the first sequence with a length of 8, M = 2 "1"s, 2 "0"s or "-1"s are sent in 4 OOK symbols, as shown in Table 15.

[0278] Table 15

[0279] 1 1 -1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 1 1 -1 1 -1 1 1 0 0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 0 1 1

[0280] Taking the first row in Table 15 as an example, the first sequence includes a total of 2 groups of 4 consecutive elements, namely [1, 1, -1, -1] and [-1, 1, -1, 1]. The elements in each group are sent in 4 OOK symbols corresponding to one OFDM symbol.

[0281] Exemplarily, when there are M = 4 OOK symbols in one OFDM symbol, the length N of the first sequence carried by the first signal seq = 12, occupying 3 OFDM symbols, that is, a total of 12 OOK symbols are occupied. The first sequence is as follows in the table, where each row represents a first sequence. Additionally, "0", "1", and "-1" in the following table can be replaced with each other.

[0282] Optionally, "0" in the first sequence in the following tables can be replaced with "-1".

[0283] Optionally, "0" in the first sequence in the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0284] For the first sequence with a length of 12, M = 1 "1", 3 "0"s or "-1"s are sent in 4 OOK symbols, as shown in Table 16.

[0285] Table 16

[0286] -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 0 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 1 0 0 0 0 1

[0287] Taking the first row in Table 16 as an example, the first sequence includes a total of 3 groups of 4 consecutive elements, namely [-1, -1, 1, -1], [-1, -1, -1, 1], and [-1, -1, -1, 1]. The elements in each group are sent in 4 OOK symbols corresponding to one OFDM symbol.

[0288] For the first sequence with a length of 12, M = 2 "1"s, 2 "0"s or "-1"s are sent in 4 OOK symbols, as shown in Table 17.

[0289] Table 17

[0290] 1 1 -1 -1 -1 -1 1 1 -1 1 -1 1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 1 -1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 1 0 1 0 0 1 0 1 0 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

[0291] Taking the first row in Table 17 as an example, the first sequence includes a total of 3 groups of 4 consecutive elements: [1, 1, -1, -1], [-1, -1, 1, 1], and [-1, 1, -1, 1]. The elements in each group are sent in the 4 OOK symbols corresponding to them in one OFDM symbol.

[0292] Exemplarily, when there are M = 4 OOK symbols in one OFDM symbol, the length N of the first sequence carried by the first signal seq = 16, occupying 4 OFDM symbols, that is, a total of 16 OOK symbols are occupied. The first sequence is as follows in the table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0293] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0294] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0295] For the first sequence with a length of 16, 1 "1" and 3 "0" or "-1" are sent in M = 4 OOK symbols, as shown in Table 18.

[0296] Table 18

[0297]

[0298]

[0299] Taking the first row in Table 18 as an example, the first sequence includes a total of 4 groups of 4 consecutive elements: [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1]. The elements in each group are sent in the 4 OOK symbols corresponding to them in one OFDM symbol.

[0300] For the first sequence with a length of 16, 2 "1" and 2 "0" or "-1" are sent in M = 4 OOK symbols, as shown in Table 19 and Table 20.

[0301] Table 19

[0302]

[0303]

[0304] Table 20

[0305]

[0306]

[0307] Taking the first row in Table 19 as an example, the first sequence includes a total of 4 groups of 4 consecutive elements: [-1, 1, -1, 1], [1, 1, -1, -1], [-1, 1, -1, 1], [1, 1, -1, -1]. The elements in each group are transmitted in 4 OOK symbols corresponding to one OFDM symbol. Table 20 is a group of special sequences. It is preferred to select 4 consecutive sequences as a group of sequences starting from the first row of Table 20 (i.e., starting from the first sequence), and it is preferably configured for LP-SS or LP=Preamble. The 4 sequences selected in Table 20 are orthogonal to each other, or the cross-correlation is very low.

[0308] Exemplarily, when there are M = 4 OOK symbols in one OFDM symbol, the length N of the first sequence carried by the first signal seq = 20, occupying 5 OFDM symbols, that is, a total of 20 OOK symbols are occupied. The first sequence is as follows in the table, where each row represents a first sequence. In addition, the "0", "1", and "-1" in the following table can be replaced with each other.

[0309] Optionally, the "0" in the first sequence in the following tables can be replaced with "-1".

[0310] Optionally, the "0" in the first sequence in the following tables can be replaced with "1", and at the same time, the "1" can be replaced with "-1".

[0311] For the first sequence with a length of 20, 1 "1", 3 "0"s or "-1"s are sent among M = 4 OOK symbols, as shown in Table 21.

[0312] Table 21

[0313] -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 1 0 0 0 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 1 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1

[0314] Taking the first row in Table 21 as an example, the first sequence includes a total of 5 groups of 4 consecutive elements: [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, -1, 1]. The elements in each group are transmitted in 4 OOK symbols corresponding to one OFDM symbol.

[0315] For the first sequence with a length of 20, 2 "1"s, 2 "0"s or "-1"s are sent among M = 4 OOK symbols, as shown in Table 22.

[0316] Table 22

[0317]

[0318]

[0319] Taking the first row in Table 22 as an example, the first sequence includes a total of 5 groups of 4 consecutive elements: [1, 1, -1, -1], [-1, -1, 1, 1], [1, 1, -1, -1], [1, -1, 1, -1], [-1, 1, -1, 1]. The elements in each group are sent in 4 OOK symbols corresponding to them in one OFDM symbol.

[0320] Exemplarily, when there are M = 4 OOK symbols in one OFDM symbol, the length N of the first sequence carried by the first signal seq = 24, occupying 6 OFDM symbols, that is, a total of 24 OOK symbols are occupied. The first sequence is as follows in the table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0321] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0322] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0323] For the first sequence with a length of 24, 1 "1" and 3 "0"s or "-1"s are sent in M = 4 OOK symbols, as shown in Table 23.

[0324] Table 23

[0325]

[0326]

[0327] Taking the first row in Table 23 as an example, the first sequence includes a total of 6 groups of 4 consecutive elements: [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1], [-1, 1, -1, -1]. The elements in each group are sent in 4 OOK symbols corresponding to them in one OFDM symbol.

[0328] For the first sequence with a length of 24, 2 "1"s and 2 "0"s or "-1"s are sent in M = 4 OOK symbols, as shown in Table 24 and Table 25.

[0329] Table 24

[0330] -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1 1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 -1 1 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 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 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 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

[0331] Table 25

[0332] 1 1 -1 -1 1 1 -1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 1 -1 1 -1 1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 1 -1 -1 1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1

[0333] Taking the first row in Table 24 as an example, the first sequence includes a total of 6 groups of 4 consecutive elements: [-1, -1, 1, 1], [1, 1, -1, -1], [-1, -1, 1, 1], [1, -1, 1, -1], [1, -1, 1, -1], [-1, 1, 1, -1]. The elements in each group are sent in the 4 OOK symbols corresponding to one OFDM symbol. Table 25 is a group of special sequences, and the 4 sequences in Table 25 are orthogonal to each other, or have a very low cross-correlation.

[0334] Exemplarily, when there are M = 4 OOK symbols in one OFDM symbol, the length N of the first sequence carried by the first signal seq = 28, occupying 7 OFDM symbols, that is, a total of 28 OOK symbols are occupied. The first sequence is as follows in the table, where each row represents a first sequence. In addition, the "0", "1", and "-1" in the following table can be replaced with each other.

[0335] Optionally, the "0" in the first sequence in each of the following tables can be replaced with "-1".

[0336] Optionally, the "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, the "1" can be replaced with "-1".

[0337] For the first sequence with a length of 28, 1 "1" and 3 "0" or "-1" are sent in M = 4 OOK symbols, as shown in Table 26.

[0338] Table 26

[0339]

[0340]

[0341] Taking the first row in Table 26 as an example, the first sequence includes a total of 7 groups of 4 consecutive elements: [1, -1, -1, -1], [1, -1, -1, -1], [1, -1, -1, -1], [-1, 1, -1, -1], [-1, 1, -1, -1], [-1, 1, -1, -1], [-1, 1, -1, -1]. The elements in each group are sent in the 4 OOK symbols corresponding to one OFDM symbol.

[0342] For the first sequence with a length of 28, 2 "1" and 2 "0" or "-1" are sent in M = 4 OOK symbols, as shown in Table 27.

[0343] Table 27

[0344]

[0345]

[0346] Taking the first row in Table 27 as an example, the first sequence includes a total of 7 groups of 4 consecutive elements: [-1, -1, 1, 1], [-1, 1, 1, -1], [1, -1, 1, -1], [-1, 1, -1, 1], [1, 1, -1, -1], [-1, -1, 1, 1], [1, 1, -1, -1]. The elements in each group are sent in the 4 OOK symbols corresponding to them in one OFDM symbol.

[0347] Exemplarily, when there are M = 4 OOK symbols in one OFDM symbol, the length N of the first sequence carried by the first signal seq = 32, occupying 8 OFDM symbols, that is, a total of 32 OOK symbols are occupied. The first sequence is as shown in the following table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0348] Optionally, "0" in the first sequence in the following tables can be replaced with "-1".

[0349] Optionally, "0" in the first sequence in the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0350] For the first sequence with a length of 32, 1 "1", 3 "0"s or "-1"s are sent in M = 4 OOK symbols, as shown in Table 28.

[0351] Table 28

[0352]

[0353]

[0354] Taking the first row in Table 28 as an example, the first sequence includes a total of 8 groups of 4 consecutive elements: [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, 1, -1], [-1, -1, -1, 1], [-1, -1, -1, 1], [-1, -1, -1, 1], [-1, -1, -1, 1]. The elements in each group are sent in the 4 OOK symbols corresponding to them in one OFDM symbol.

[0355] For the first sequence with a length of 32, 2 "1"s, 2 "0"s or "-1"s are sent in M = 4 OOK symbols, as shown in Table 29 and Table 30.

[0356] Table 29

[0357]

[0358]

[0359] Table 30

[0360]

[0361]

[0362] Taking the first row in Table 29 as an example, the first sequence includes a total of 8 groups of 4 consecutive elements: [-1, 1, -1, 1], [1, -1, 1, -1], [-1, 1, -1, 1], [-1, -1, 1, 1], [1, 1, -1, -1], [-1, -1, 1, 1], [1, 1, -1, -1], [-1, -1, 1, 1]. The elements in each group are sent in 4 OOK symbols corresponding to an OFDM symbol. Table 30 is a set of special sequences. It is preferred to select 4 consecutive sequences as a set of sequences starting from the first row of Table 30 (i.e., starting from the first sequence), and it is preferably configured for LP-SS or LP = Preamble. The 4 sequences selected in Table 20 are orthogonal to each other or have a very low cross-correlation.

[0363] Taking M = 8 and sequence lengths of 8, 16, 24, and 32 as examples for illustration, it should be noted that the following sequences are not limited to being used when M = 8, and the following sequences can also be used when M is other values.

[0364] Exemplarily, when there are M = 8 OOK symbols in one OFDM symbol, the length N of the first sequence carried by the first signal seq = 8, occupying 1 OFDM symbol, that is, a total of 8 OOK symbols are occupied. The first sequence is as follows in the table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0365] Optionally, "0" in the first sequence in the following tables can be replaced with "-1".

[0366] Optionally, "0" in the first sequence in the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0367] For the first sequence with a length of 8, 1 "1" and 7 "0"s or "-1"s are sent among M = 8 OOK symbols, as shown in Table 31.

[0368] Table 31

[0369]

[0370]

[0371] Taking the first row in Table 31 as an example, the first sequence includes [1, 0, 0, 0, 0, 0, 0, 0], a total of 1 group of 8 consecutive elements, and the elements in each group are sent in 8 OOK symbols corresponding to one OFDM symbol.

[0372] For the first sequence with a length of 8, M = send 2 "1"s, 6 "0"s or "-1"s in 8 OOK symbols, as shown in Table 32.

[0373] Table 32

[0374]

[0375]

[0376] Taking the first row in Table 32 as an example, the first sequence includes [1, 0, 0, 0, 1, 0, 0, 0], a total of 1 group of 8 consecutive elements, and the elements in each group are sent in 8 OOK symbols corresponding to one OFDM symbol.

[0377] For the first sequence with a length of 8, M = send 3 "1"s, 5 "0"s or "-1"s in 8 OOK symbols, as shown in Table 33.

[0378] Table 33

[0379] 1 1 0 0 0 1 0 0 1 1 0 0 0 0 1 0 1 1 0 0 0 0 0 1 1 0 0 0 1 1 0 0 1 0 0 0 0 1 1 0 0 1 1 0 0 0 0 1 0 1 0 0 0 1 1 0 0 1 0 0 0 0 1 1 0 0 1 1 0 0 0 1 1 1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 1 1 1 -1

[0380] Taking the first row in Table 33 as an example, the first sequence includes [1, 1, 0, 0, 0, 1, 0, 0], a total of 1 group of 8 consecutive elements, and the elements in each group are sent in 8 OOK symbols corresponding to one OFDM symbol.

[0381] For the first sequence with a length of 8, M = send 4 "1"s, 4 "0"s or "-1"s in 8 OOK symbols, as shown in Table 34.

[0382] Table 34

[0383] 1 1 0 0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 0 1 1 1 -1 -1 -1 1 -1 1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 1 1 1 -1

[0384] Taking the first row in Table 34 as an example, the first sequence includes [1, 1, 0, 0, 1, 0, 0, 1], a total of 1 group of 8 consecutive elements, and the elements in each group are sent in 8 OOK symbols corresponding to one OFDM symbol.

[0385] For the first sequence with a sequence length of 8, among the M = 8 OOK symbols, 5 "1"s, 3 "0"s or "-1"s are transmitted, as shown in Table 35.

[0386] Table 35

[0387]

[0388]

[0389] Taking the first row in Table 35 as an example, the first sequence includes a total of 1 group of 8 consecutive elements [1, 1, 0, 1, 0, 1, 0, 1], and the elements in each group are transmitted in the 8 OOK symbols corresponding to one OFDM symbol.

[0390] Exemplarily, when there are M = 8 OOK symbols in one OFDM symbol, the length N of the first sequence carried by the first signal seq = 16, occupying 2 OFDM symbols, that is, a total of 16 OOK symbols are occupied. The first sequence is as follows, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0391] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0392] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0393] For the first sequence with a sequence length of 16, among the M = 8 OOK symbols, 1 "1", 7 "0"s or "-1"s are transmitted, as shown in Table 36.

[0394] Table 36

[0395] 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1

[0396] Taking the first row in Table 36 as an example, the first sequence 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 8 OOK symbols corresponding to one OFDM symbol.

[0397] For the first sequence with a sequence length of 16, among the M = 8 OOK symbols, 2 "1"s, 6 "0"s or "-1"s are transmitted, as shown in Table 37.

[0398] Table 37

[0399]

[0400]

[0401] Taking the first row in Table 37 as an example, the first sequence includes a total of 2 groups of 8 consecutive elements: [1, 1, 0, 0, 0, 0, 0, 0] and [1, 0, 0, 0, 0, 1, 0, 0]. The elements in each group are sent in 8 OOK symbols corresponding to one OFDM symbol.

[0402] For the first sequence with a length of 16, M = 3 "1"s, 5 "0"s or "-1"s are sent in 8 OOK symbols, as shown in Table 38.

[0403] Table 38

[0404] 1 1 0 0 0 1 0 0 1 0 0 0 1 0 0 1 1 1 0 0 0 1 0 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 1 0 0 0 1 1 0 0 0 1 1 0 0 1 0 0 0 1 1 0 0 0 1 0 0 1 1 0 0 1 0 0 0 1 0 0 1 0 0 0 1 1 1 0 0 0 1 1 0 0 0 1 0 0 1 0 0 1 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 -1 1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 1 1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 1

[0405] Taking the first row in Table 38 as an example, the first sequence includes a total of 2 groups of 8 consecutive elements: [1, 1, 0, 0, 0, 1, 0, 0] and [1, 0, 0, 0, 1, 0, 0, 1]. The elements in each group are sent in 8 OOK symbols corresponding to one OFDM symbol.

[0406] For the first sequence with a length of 16, M = 4 "1"s, 4 "0"s or "-1"s are sent in 8 OOK symbols, as shown in Table 39.

[0407] Table 39

[0408] 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 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 1 1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 1 1 -1 1 1 1 -1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 1 1 -1 -1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 -1 1

[0409] Taking the first row in Table 39 as an example, the first sequence includes a total of 2 groups of 8 consecutive elements: [1, 0, 1, 0, 1, 0, 1, 0] and [1, 0, 1, 0, 1, 0, 1, 0]. The elements in each group are sent in 8 OOK symbols corresponding to one OFDM symbol.

[0410] For the first sequence with a length of 16, M = 5 "1"s, 3 "0"s or "-1"s are sent in 8 OOK symbols, as shown in Table 40.

[0411] Table 40

[0412] 1 1 0 1 0 1 0 1 0 1 1 0 1 0 1 1 1 1 0 1 1 0 1 0 1 0 1 0 1 0 1 1 1 1 0 1 0 1 1 0 1 0 1 0 1 0 1 1 1 1 0 1 0 1 0 1 0 1 0 1 1 0 1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 -1 1 -1 -1 1 -1 1 1 1 1 1 -1 1 1 1 -1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 1 -1 1 1 1 -1 1 1 -1 1 1 1 -1 1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 1 -1 1 1 1 -1 1 1 -1 -1 -1 1 1 1 -1 1 1 1 1 1 -1 1 -1 -1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 1 1 1 -1 1

[0413] Taking the first row in Table 40 as an example, the first sequence includes a total of 2 groups of 8 consecutive elements: [1, 1, 0, 1, 0, 1, 0, 1] and [0, 1, 1, 0, 1, 0, 1, 1]. The elements in each group are sent in 8 OOK symbols corresponding to one OFDM symbol.

[0414] Exemplarily, when one OFDM symbol includes M = 8 OOK symbols, the length N of the first sequence carried by the first signal seq= 24, occupying 3 OFDM symbols, that is, a total of 24 OOK symbols are occupied. The first sequence is as follows in the table, where each row represents a first sequence. Additionally, the "0", "1", and "-1" in the following table can be replaced with each other.

[0415] Optionally, the "0" in the first sequence in each of the following tables can be replaced with "-1".

[0416] Optionally, the "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, the "1" can be replaced with "-1".

[0417] For the first sequence with a length of 24, M = 1 "1" is sent among 8 OOK symbols, and 7 "0"s or "-1"s, as shown in Table 41.

[0418] Table 41

[0419] 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 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 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 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 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 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 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 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1

[0420] Taking the first row in Table 41 as an example, the first sequence includes a total of 3 groups of 8 consecutive elements: [1, 0, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 0]. The elements in each group are sent in the 8 OOK symbols corresponding to one OFDM symbol.

[0421] For the first sequence with a length of 24, M = 2 "1"s are sent among 8 OOK symbols, and 6 "0"s or "-1"s, as shown in Table 42.

[0422] Table 42

[0423]

[0424]

[0425] Taking the first row in Table 42 as an example, the first sequence includes a total of 3 groups of 8 consecutive elements: [1, 1, 0, 0, 0, 0, 0, 0], [1, 0, 0, 1, 0, 0, 0, 0], [1, 0, 0, 0, 0, 0, 0, 1]. The elements in each group are sent in the 8 OOK symbols corresponding to one OFDM symbol.

[0426] For the first sequence with a length of 24, M = 3 "1"s are sent among 8 OOK symbols, and 5 "0"s or "-1"s, as shown in Table 43.

[0427] Table 43

[0428]

[0429]

[0430] Taking the first row in Table 43 as an example, the first sequence includes a total of 3 groups of 8 consecutive elements: [1, 1, 0, 0, 1, 0, 0, 0], [1, 0, 0, 1, 0, 0, 1, 0], and [0, 1, 0, 0, 1, 0, 0, 1]. The elements in each group are transmitted in 8 OOK symbols corresponding to them in one OFDM symbol.

[0431] For the first sequence with a length of 24, M = 4 "1"s, 4 "0"s or "-1"s are transmitted in 8 OOK symbols, as shown in Table 44.

[0432] Table 44

[0433]

[0434]

[0435] Taking the first row in Table 44 as an example, the first sequence includes a total of 3 groups of 8 consecutive elements: [1, 0, 1, 0, 1, 0, 1, 0], [1, 0, 1, 0, 1, 0, 1, 0], and [1, 0, 1, 0, 1, 0, 1, 0]. The elements in each group are transmitted in 8 OOK symbols corresponding to them in one OFDM symbol.

[0436] For the first sequence with a length of 24, M = 5 "1"s, 3 "0"s or "-1"s are transmitted in 8 OOK symbols, as shown in Table 45.

[0437] Table 45

[0438] 1 1 1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 1 1 1 -1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 -1 1 1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 1 1 -1 1 -1 -1 -1 1 1 1 1 1 1 1 -1 1 -1 1 1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 1 1 1 -1 -1 -1 -1 1 1 -1 1 1 1 1 -1 1 -1 1 1 -1 1 1 1 -1 1 -1 -1 1 1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 1 1 -1 1 -1 1 1 1 -1 -1 1 1 1 1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 1 1 1 -1 1 1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 1 1 1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 1 1 1 -1 1 1 -1 1 -1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 1 1 -1 1 -1 1 1 1 -1 1 1 1 1 -1 -1 -1 1 -1 -1 1 1 1 1 -1 1 1 -1 -1 1 1 1 1 1 -1 1 1 -1 1 -1 1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 1 1 1 1 -1 1 1 -1 1 -1 1 -1 1 1 1 1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 -1 1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 -1 1 1 -1 -1 1 1 1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 1 1 1 -1 1 -1 -1 1 1 1 -1 1 1 -1 1 -1 -1 -1 1 1 1 1 1 -1 1 -1 -1 1 1 1 -1 1 1 1 -1 1 -1 1 1 -1 -1 -1 1 -1 1 1 1 1 1 -1 -1 1 1 1 -1 1 1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 1 1 1 1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 1 1 1 -1 1 -1 1 1 1 1 -1

[0439] Taking the first row in Table 45 as an example, the first sequence includes a total of 3 groups of 8 consecutive elements: [1, 1, 1, 1, -1, -1, 1, -1], [-1, -1, 1, 1, 1, 1, -1, 1], and [1, 1, -1, 1, -1, 1, 1, -1]. The elements in each group are transmitted in 8 OOK symbols corresponding to them in one OFDM symbol.

[0440] Exemplarily, when one OFDM symbol includes M = 8 OOK symbols, the length N of the first sequence carried by the first signal seq = 32, occupying 4 OFDM symbols, that is, a total of 32 OOK symbols are occupied. The first sequence is as follows in the table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0441] Optionally, "0" in the first sequence in the following tables can be replaced with "-1".

[0442] Optionally, the "0" in the first sequence in the following tables can be replaced by "1", and at the same time, "1" can be replaced by "-1".

[0443] For the first sequence with a length of 32, M = 1 "1" is sent among 8 OOK symbols, and 7 "0"s or "-1"s, as shown in Table 46.

[0444] Table 46

[0445] 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 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 1 0 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 1 0 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 1 0 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 1 0 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 1 0 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 1 0 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 1

[0446] Taking the first row in Table 46 as an example, the first sequence includes a total of 4 groups of 8 consecutive elements: [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]. The elements in each group are sent in the 8 OOK symbols corresponding to one OFDM symbol.

[0447] For the first sequence with a length of 32, M = 2 "1"s are sent among 8 OOK symbols, and 6 "0"s or "-1"s, as shown in Table 47.

[0448] Table 47

[0449] 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 1 0 0 0 0 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 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 1 0 0 0 0 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1

[0450] Taking the first row in Table 47 as an example, the first sequence includes a total of 4 groups of 8 consecutive elements: [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]. The elements in each group are sent in the 8 OOK symbols corresponding to one OFDM symbol.

[0451] For the first sequence with a length of 32, M = 3 "1"s are sent among 8 OOK symbols, and 5 "0"s or "-1"s, as shown in Table 48.

[0452] Table 48

[0453]

[0454]

[0455]

[0456] Taking the first row in Table 48 as an example, the first sequence includes a total of 4 groups of 8 consecutive elements: [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]. The elements in each group are transmitted in the 8 OOK symbols corresponding to one OFDM symbol.

[0457] For the first sequence with a length of 32, M = 4 "1"s, 4 "0"s or "-1"s are transmitted in 8 OOK symbols, as shown in Table 49.

[0458] Table 49

[0459]

[0460]

[0461]

[0462]

[0463]

[0464]

[0465]

[0466] Taking the first row in Table 49 as an example, the first sequence includes a total of 4 groups of 8 consecutive elements: [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]. The elements in each group are transmitted in the 8 OOK symbols corresponding to one OFDM symbol.

[0467] For the first sequence with a length of 32, M = 5 "1"s, 3 "0"s or "-1"s are transmitted in 8 OOK symbols, as shown in Table 50.

[0468] Table 50

[0469]

[0470]

[0471] Taking the first row in Table 50 as an example, the first sequence includes 4 groups of 8 consecutive elements: [1, 1, 1, 1, -1, -1, 1, -1], [-1, -1, 1, 1, 1, -1, 1, 1], [-1, 1, 1, 1, -1, 1, -1, 1], and [1, 1, 1, -1, -1, 1, -1, 1]. The elements in each group are sent in 8 OOK symbols corresponding to an OFDM symbol.

[0472] In one embodiment, a part of the elements in the first sequence are sent in OOK symbols of the first type, and another part of the elements are sent in OOK symbols of the second type; wherein, the time domain position of the OOK symbols of the first type is located in the OFDM symbol, and the data position of the OOK symbols of the second type is located in the cyclic prefix of the OFDM symbol.

[0473] Figure 7 This is the third signal generation schematic diagram provided by the embodiment of the present application. As Figure 7 shown, the first signal transmission occupies N + 4 OOK symbols. Among them, N OOK symbols (OOK 0 to OOK (N - 1)) carry the first sequence information. The OOK symbol X0 and the OOK symbol X1 carry the information of the last 2 elements in the first sequence or carry the information of 2 padding elements. The OOK symbol Y0 and the OOK symbol Y1 carry the information of the first 2 elements in the first sequence or carry the information of 2 padding elements. Figure 8 This is the fourth signal generation schematic diagram provided by the embodiment of the present application. As Figure 8 shown, the first signal transmission occupies N + 2 OOK symbols. Among them, N OOK symbols (OOK 0 to OOK (N - 1)) carry the first sequence information. The OOK symbol X0 and the OOK symbol X1 carry the information of the last 2 elements in the first sequence or carry the information of 2 padding elements. After the first information, a time interval is further configured, and its length is at least one OOK symbol or at least one OFDM symbol. Figure 7 Or Figure 8 The OOK symbols in include OOK symbols of the first type and / or OOK symbols of the second type.

[0474] In one embodiment, the OOK symbols of the second type occupy all or part of the time domain resources of the cyclic prefix of the OFDM symbol.

[0475] In one embodiment, the OOK symbols of the first type and the OOK symbols of the second type occupy the same frequency domain resources.

[0476] In one embodiment, the elements carried by the OOK symbols of the second type are the same as the elements in the first sequence carried by the last OOK symbol of the M OOK symbols of the first type in the corresponding OFDM symbol.

[0477] In one embodiment, the time-domain expression of the second type of OOK symbol is generated in the following manner:

[0478] It is generated based on the time-domain expression of the first length in the time-domain expression of the last first-type OOK symbol among the M first-type OOK symbols in the corresponding OFDM symbol;

[0479] Or it is generated 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.

[0480] In one embodiment, when the first signal occupies Y OFDM symbols, and one OFDM symbol includes M first-type OOK symbols and one second-type OOK symbol, the method includes at least one of the following:

[0481] Carrying at least one first sequence by Y*M first-type OOK symbols;

[0482] Carrying at least one first sequence by Y*M first-type OOK symbols and Y second-type OOK symbols;

[0483] Where Y is an integer greater than or equal to 1.

[0484] Below, let M = 2, and the sequence length be 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.

[0485] Exemplarily, when one OFDM symbol includes M = 2 OOK symbols, there are two choices for the length of the first sequence carried by the first signal, that is, N seq = 8 + 4 or N seq = 8, occupying 4 OFDM symbols.

[0486] When N seq = 8 + 4, the first sequence occupies 12 OOK symbols, among which the number of first-type OOK symbols is 8 and the number of second-type OOK symbols is 4.

[0487] When N seq = 8, the first sequence occupies 8 OOK symbols, among which the number of first-type OOK symbols is 8.

[0488] The first sequence is as follows in the table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0489] Optionally, the "0" in the first sequence in the following tables can be replaced with "-1".

[0490] Optionally, the "0" in the first sequence in the following tables can be replaced with "1", and at the same time, the "1" can be replaced with "-1".

[0491] For the first sequence with a length of 8, 1 "1", 1 "0", or "-1" is sent in 2 OOK symbols of the first type, as shown in Table 51. For the first sequence with a length of 12, 1 "1", 1 "0", or "-1" is sent in 2 OOK symbols of the first type, as shown in Table 52.

[0492] Table 51

[0493] 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 0 1 1 0 1 0 0 1 1 0 1 0 1 0 0 1 1 0 0 1 1 0 0 1 0 1 1 0 0 1 1 0 1 0 1 0 0 1 1 0 1 0 0 1 0 1 1 0 0 1 0 1 0 1 0 1 1 0 1 0 0 1 0 1 1 0 0 1

[0494] Table 52

[0495]

[0496]

[0497] Exemplarily, when 2 OOK symbols of M are included in 1 OFDM symbol, there are two choices for the length of the first sequence carried by the first signal, that is, N seq = 10 + 5 or N seq = 10, occupying 5 OFDM symbols.

[0498] When N seq = 10 + 5, the first sequence occupies 15 OOK symbols, among which the number of OOK symbols of the first type is 10, and the number of OOK symbols of the second type is 5.

[0499] When N seq = 10, the first sequence occupies 10 OOK symbols, among which the number of OOK symbols of the first type is 10.

[0500] The first sequence is as follows in the table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0501] Optionally, the "0" in the first sequence in the following tables can be replaced with "-1".

[0502] Optionally, the "0" in the first sequence in the following tables can be replaced with "1", and at the same time, the "1" can be replaced with "-1".

[0503] For the first sequence with a length of 10, among the M = 2 OOK symbols of the first type, 1 "1", 1 "0" or "-1" is transmitted, as shown in Table 53. For the first sequence with a length of 15, among the M = 2 OOK symbols of the first type, 1 "1", 1 "0" or "-1" is transmitted, as shown in Table 54.

[0504] Table 53

[0505] 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 0 1 1 0 1 0 1 0 1 0 0 1 1 0 0 1 1 0 1 0 0 1 0 1 1 0 1 0 0 1 1 0 1 0 1 0 1 0 0 1 1 0 1 0 0 1 1 0 0 1 0 1 1 0 1 0 0 1 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0

[0506] Table 54

[0507]

[0508]

[0509] Exemplarily, when an OFDM symbol includes M = 2 OOK symbols, there are two choices for the length of the first sequence carried by the first signal, namely N seq = 12 + 6 or N seq = 12, occupying 6 OFDM symbols.

[0510] When N seq = 12 + 6, the first sequence occupies 18 OOK symbols, among which the number of OOK symbols of the first type is 12, and the number of OOK symbols of the second type is 6.

[0511] When N seq = 12, the first sequence occupies 12 OOK symbols, among which the number of OOK symbols of the first type is 12.

[0512] The first sequence is as follows in the table, where each row represents a first sequence. Additionally, "0", "1", and "-1" in the following table can be replaced with each other.

[0513] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0514] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0515] For the first sequence with a length of 12, among the M = 2 OOK symbols of the first type, 1 "1", 1 "0" or "-1" is transmitted, as shown in Table 55. For the first sequence with a length of 18, among the M = 2 OOK symbols of the first type, 1 "1", 1 "0" or "-1" is transmitted, as shown in Table 56.

[0516] Table 55

[0517] 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 0 1 1 0 0 1 0 1 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0

[0518] Table 56

[0519]

[0520]

[0521] Exemplarily, when there are M = 2 OOK symbols in one OFDM symbol, there are two choices for the length of the first sequence carried by the first signal, namely N seq = 14 + 7 or N seq = 14, occupying 7 OFDM symbols.

[0522] When N seq = 14 + 7, the first sequence occupies 21 OOK symbols, where the number of the first type of OOK symbols is 14 and the number of the second type of OOK symbols is 7.

[0523] When N seq = 14, the first sequence occupies 14 OOK symbols, where the number of the first type of OOK symbols is 14.

[0524] The first sequence is as shown in the following table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0525] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0526] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0527] For the first sequence with a length of 14, one of "1", "0", or "-1" is sent in the first type of M = 2 OOK symbols, as shown in Table 57. For the first sequence with a length of 21, one of "1", "0", or "-1" is sent in the first type of M = 2 OOK symbols, as shown in Table 58.

[0528] Table 57

[0529]

[0530]

[0531] Table 58

[0532] 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 0 1 0 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 1 1 0 1 1 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0

[0533] Exemplarily, when there are M = 2 OOK symbols in one OFDM symbol, there are two choices for the length of the first sequence carried by the first signal, namely Nseq = 2i + i or N seq = 2i, occupying i OFDM symbols. Wherein, i is an integer greater than or equal to 8.

[0534] When N seq = 2i + i, the first sequence occupies 2i + i OOK symbols, where the number of the first type of OOK symbols is 2i, and the number of the second type of OOK symbols is i.

[0535] When N seq = 2i, the first sequence occupies 2i OOK symbols, where the number of the first type of OOK symbols is 2i.

[0536] The first sequence is as follows in the table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0537] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0538] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0539] For the first sequence with a length of 2i, 1 "1", 1 "0", or "-1" is sent in the first type of M = 2 OOK symbols, for example, Seq1 or Seq2.

[0540]

[0541] For the first sequence with a length of 2i + i, 1 "1", 1 "0", or "-1" is sent in the first type of M = 2 OOK symbols, for example, Seq3 or Seq4, Seq3 corresponds to Seq1, and Seq4 corresponds to Seq2.

[0542]

[0543] Below, taking M = 4, the sequence lengths are 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.

[0544] Exemplarily, when there are M = 4 OOK symbols in 1 OFDM symbol, there are two choices for the length of the first sequence carried by the first signal, that is, N seq = 8 + 2 or N seq = 8, occupying 2 OFDM symbols.

[0545] When N seqWhen N = 8 + 2, the first sequence occupies 10 OOK symbols, among which the number of OOK symbols of the first type is 8, and the number of OOK symbols of the second type is 2.

[0546] When N seq = 8, the first sequence occupies 8 OOK symbols, among which the number of OOK symbols of the first type is 8.

[0547] The first sequence is as shown in the following table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0548] Optionally, "0" in the first sequence in the following tables can be replaced with "-1".

[0549] Optionally, "0" in the first sequence in the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0550] For the first sequence with a length of 8, 1 "1", 3 "0"s or "-1"s are sent among the M = 4 OOK symbols of the first type, as shown in Table 59. For the first sequence with a length of 10, 1 "1", 3 "0"s or "-1"s are sent among the M = 4 OOK symbols of the first type, as shown in Table 60.

[0551] Table 59

[0552] 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 0 1 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 1 0 0 1 0 1 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 0 1 0 0 1 0 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1

[0553] Table 60

[0554] 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 1 0 0 0 1 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 0 1 0 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1

[0555] For the first sequence with a length of 8, 2 "1"s, 2 "0"s or "-1"s are sent among the M = 4 OOK symbols of the first type, as shown in Table 61. For the first sequence with a length of 10, 2 "1"s, 2 "0"s or "-1"s are sent among the M = 4 OOK symbols of the first type, as shown in Table 62.

[0556] Table 61

[0557] 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 1 -1 1 1 -1 -1 1 1 -1 -1 -1 1 1 -1 -1 1 1

[0558] Table 62

[0559]

[0560]

[0561] Exemplarily, when an OFDM symbol includes M = 4 OOK symbols, there are two choices for the length of the first sequence carried by the first signal, that is, Nseq = 12 + 3 or N seq = 12, occupying 3 OFDM symbols.

[0562] When N seq = 12 + 3, the first sequence occupies 15 OOK symbols, among which the number of the first type of OOK symbols is 12, and the number of the second type of OOK symbols is 3.

[0563] When N seq = 12, the first sequence occupies 12 OOK symbols, among which the number of the first type of OOK symbols is 12.

[0564] The first sequence is as shown in the following table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0565] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0566] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0567] For the first sequence with a length of 12, 1 "1", 3 "0"s or "-1"s are sent among the first type of M = 4 OOK symbols, as shown in Table 63. For the first sequence with a length of 15, 1 "1", 3 "0"s or "-1"s are sent among the first type of M = 4 OOK symbols, as shown in Table 64.

[0568] Table 63

[0569] 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 0 0 1 0 1 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1

[0570] Table 64

[0571]

[0572]

[0573] For the first sequence with a length of 12, 2 "1"s, 2 "0"s or "-1"s are sent among the first type of M = 4 OOK symbols, as shown in Table 65. For the first sequence with a length of 15, 2 "1"s, 2 "0"s or "-1"s are sent among the first type of M = 4 OOK symbols, as shown in Table 66.

[0574] Table 65

[0575] 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 1 -1 -1 -1 1 1 -1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1

[0576] Table 66

[0577] 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 -1 1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 -1

[0578] Exemplarily, when there are M = 4 OOK symbols in one OFDM symbol, there are two choices for the length of the first sequence carried by the first signal, namely N seq = 16 + 4 or N seq = 16, occupying 4 OFDM symbols.

[0579] When N seq = 16 + 4, the first sequence occupies 20 OOK symbols, where the number of the first type of OOK symbols is 16 and the number of the second type of OOK symbols is 4.

[0580] When N seq = 16, the first sequence occupies 16 OOK symbols, where the number of the first type of OOK symbols is 16.

[0581] The first sequence is as follows in the table, where each row represents a first sequence. Additionally, "0", "1", and "-1" in the following table can be replaced with each other.

[0582] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0583] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0584] For the first sequence with a length of 16, 1 "1", 3 "0"s or "-1"s are sent among the first type of M = 4 OOK symbols, as shown in Table 67. For the first sequence with a length of 20, 1 "1", 3 "0"s or "-1"s are sent among the first type of M = 4 OOK symbols, as shown in Table 68.

[0585] Table 67

[0586]

[0587]

[0588] Table 68

[0589]

[0590]

[0591] For the first sequence with a length of 12, in the first type of M = 4 OOK symbols, 2 "1"s, 2 "0"s or "-1"s are sent, as shown in Table 69. For the first sequence with a length of 15, in the first type of M = 4 OOK symbols, 2 "1"s, 2 "0"s or "-1"s are sent, as shown in Table 70.

[0592] Table 69

[0593] 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 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 1 1 -1 -1 1 -1 -1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1 -1 -1 1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 -1 1 -1 -1 1 1

[0594] Table 70

[0595]

[0596]

[0597] Exemplarily, when an OFDM symbol includes M = 4 OOK symbols, there are two choices for the length of the first sequence carried by the first signal, namely N seq = 20 + 5 or N seq = 20, occupying 5 OFDM symbols.

[0598] When N seq = 20 + 5, the first sequence occupies 25 OOK symbols, among which the number of the first type of OOK symbols is 20 and the number of the second type of OOK symbols is 5.

[0599] When N seq = 20, the first sequence occupies 20 OOK symbols, among which the number of the first type of OOK symbols is 20.

[0600] The first sequence is as follows in the table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0601] Optionally, "0" in the first sequence in the following tables can be replaced with "-1".

[0602] Optionally, "0" in the first sequence in the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0603] For the first sequence with a length of 20, in the first type of M = 4 OOK symbols, 1 "1", 3 "0"s or "-1"s are sent, as shown in Table 71. For the first sequence with a length of 25, in the first type of M = 4 OOK symbols, 1 "1", 3 "0"s or "-1"s are sent, as shown in Table 72.

[0604] Table 71

[0605]

[0606]

[0607] Table 72

[0608]

[0609]

[0610] For the first sequence with a length of 20, in the first type, out of M = 4 OOK symbols, 2 "1"s, 2 "0"s or "-1"s are transmitted, as shown in Table 73. For the first sequence with a length of 25, in the first type, out of M = 4 OOK symbols, 2 "1"s, 2 "0"s or "-1"s are transmitted, as shown in Table 74.

[0611] Table 73

[0612] 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 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1 1 1 -1 -1 1 -1 -1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 1 -1 -1 1 -1 -1 1 1

[0613] Table 74

[0614] 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 -1 1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 1 1 -1 -1 1 1

[0615] Exemplarily, when one OFDM symbol includes M = 4 OOK symbols, there are two choices for the length of the first sequence carried by the first signal, i.e., N seq = 24 + 6 or N seq = 24, occupying 6 OFDM symbols.

[0616] When N seq = 24 + 6, the first sequence occupies 30 OOK symbols, among which the number of the first type of OOK symbols is 24 and the number of the second type of OOK symbols is 6.

[0617] When N seq = 24, the first sequence occupies 24 OOK symbols, among which the number of the first type of OOK symbols is 24.

[0618] The first sequence is as follows in the table, where each row represents a first sequence. Additionally, "0", "1", and "-1" in the following table can be replaced with each other.

[0619] Optionally, "0" in the first sequence in the following tables can be replaced with "-1".

[0620] Optionally, "0" in the first sequence in the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0621] For the first sequence with a length of 24, in the first type, 1 "1", 3 "0"s or "-1"s are sent among 4 OOK symbols, as shown in Table 75. For the first sequence with a length of 30, in the first type, 1 "1", 3 "0"s or "-1"s are sent among 4 OOK symbols, as shown in Table 76.

[0622] Table 75

[0623] 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1

[0624] Table 76

[0625]

[0626]

[0627] For the first sequence with a length of 24, in the first type, 2 "1"s, 2 "0"s or "-1"s are sent among 4 OOK symbols, as shown in Table 77. For the first sequence with a length of 30, in the first type, 2 "1"s, 2 "0"s or "-1"s are sent among 4 OOK symbols, as shown in Table 78.

[0628] Table 77

[0629] 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1

[0630] Table 78

[0631]

[0632]

[0633] Exemplarily, when an OFDM symbol includes M = 4 OOK symbols, there are two choices for the length of the first sequence carried by the first signal, namely N seq = 28 + 7 or N seq = 28, occupying 7 OFDM symbols.

[0634] When N seq = 28 + 7, the first sequence occupies 35 OOK symbols, among which the number of the first type of OOK symbols is 28 and the number of the second type of OOK symbols is 7.

[0635] When N seq = 28, the first sequence occupies 28 OOK symbols, among which the number of the first type of OOK symbols is 28.

[0636] The first sequence is as follows in the table, where each row represents a first sequence. Additionally, "0", "1", and "-1" in the following table can be replaced with each other.

[0637] Optionally, the "0" in the first sequence in the following tables can be replaced by "-1".

[0638] Optionally, the "0" in the first sequence in the following tables can be replaced by "1", and at the same time, the "1" can be replaced by "-1".

[0639] For the first sequence with a length of 28, for the first type, M = 1 "1", 3 "0"s or "-1"s are sent among 4 OOK symbols, as shown in Table 79. For the first sequence with a length of 35, for the first type, M = 1 "1", 3 "0"s or "-1"s are sent among 4 OOK symbols, as shown in Table 80.

[0640] Table 79

[0641]

[0642]

[0643] Table 80

[0644] 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 1 0 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1

[0645] For the first sequence with a length of 28, for the first type, M = 2 "1"s, 2 "0"s or "-1"s are sent among 4 OOK symbols, as shown in Table 81. For the first sequence with a length of 35, for the first type, M = 2 "1"s, 2 "0"s or "-1"s are sent among 4 OOK symbols, as shown in Table 82.

[0646] Table 81

[0647] 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 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 1 -1 1 -1 -1 1 1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 1 -1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 1 -1 1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 1 -1 -1 1 -1 1 -1 1 -1 -1 1 1 1 1 -1 -1

[0648] Table 82

[0649]

[0650]

[0651] Exemplarily, when there are M = 4 OOK symbols in 1 OFDM symbol, there are two choices for the length of the first sequence carried by the first signal, that is, N seq = 32 + 8 or N seq = 32, occupying 8 OFDM symbols.

[0652] When N seq = 32 + 8, the first sequence occupies 40 OOK symbols, among which the number of the first type of OOK symbols is 32, and the number of the second type of OOK symbols is 8.

[0653] When Nseq When = 32, the first sequence occupies 32 OOK symbols, and the number of OOK symbols of the first type among them is 32.

[0654] The first sequence is as follows in the table, where each row represents a first sequence. Additionally, "0", "1", and "-1" in the following table can be replaced with each other.

[0655] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0656] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0657] For the first sequence with a length of 32, among the M = 4 OOK symbols of the first type, 1 "1", 3 "0"s or "-1"s are sent, as shown in Table 83. For the first sequence with a length of 40, among the M = 4 OOK symbols of the first type, 1 "1", 3 "0"s or "-1"s are sent, as shown in Table 84.

[0658] Table 83

[0659]

[0660]

[0661] Table 84

[0662] 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 1 0 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1

[0663] For the first sequence with a length of 32, among the M = 4 OOK symbols of the first type, 2 "1"s, 2 "0"s or "-1"s are sent, as shown in Table 85. For the first sequence with a length of 40, among the M = 4 OOK symbols of the first type, 2 "1"s, 2 "0"s or "-1"s are sent, as shown in Table 86.

[0664] Table 85

[0665]

[0666]

[0667] Table 86

[0668]

[0669]

[0670] Below, take M = 8, and the sequence lengths are 8 + 1 or 8, 16 + 2 or 16, 24 + 3 or 24, 32 + 4 or 32 as examples.

[0671] Exemplarily, when there are M = 8 OOK symbols in one OFDM symbol, there are two choices for the length of the first sequence carried by the first signal, namely N seq = 8 + 1 or N seq = 8, occupying one OFDM symbol.

[0672] When N seq = 8 + 1, the first sequence occupies 9 OOK symbols, among which the number of the first type of OOK symbols is 8, and the number of the second type of OOK symbols is 1.

[0673] When N seq = 8, the first sequence occupies 8 OOK symbols, among which the number of the first type of OOK symbols is 8.

[0674] The first sequence is as shown in the following table, where each row represents a first sequence. Additionally, "0", "1", and "-1" in the following table can be replaced with each other.

[0675] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0676] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0677] For the first sequence with a length of 8, 1 "1", 7 "0" or "-1" are sent among the first type of M = 8 OOK symbols, as shown in Table 87. For the first sequence with a length of 9, 1 "1", 7 "0" or "-1" are sent among the first type of M = 8 OOK symbols, as shown in Table 88.

[0678] Table 87

[0679] 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

[0680] Table 88

[0681] 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0

[0682] For the first sequence with a length of 8, 2 "1", 6 "0" or "-1" are sent among the first type of M = 8 OOK symbols, as shown in Table 89. For the first sequence with a length of 9, 2 "1", 6 "0" or "-1" are sent among the first type of M = 8 OOK symbols, as shown in Table 90.

[0683] Table 89

[0684]

[0685]

[0686] Table 90

[0687]

[0688]

[0689] For the first sequence with a length of 8, for the first type, among M = 8 OOK symbols, 3 "1"s, 5 "0"s or "-1"s are sent, as shown in Table 91. For the first sequence with a length of 9, for the first type, among M = 8 OOK symbols, 3 "1"s, 5 "0"s or "-1"s are sent, as shown in Table 92.

[0690] Table 91

[0691] 1 0 1 0 1 0 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 0 1 0 1 0 0 1 0 1 0 1 0 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 0 1 0 1 0 0 1 0 1 0 1 0 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 0 1 0 1 0 1 1 1 -1 -1 -1 -1 1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 1

[0692] Table 92

[0693]

[0694]

[0695] For the first sequence with a length of 8, for the first type, among M = 8 OOK symbols, 4 "1"s, 4 "0"s or "-1"s are sent, as shown in Table 93. For the first sequence with a length of 9, for the first type, among M = 8 OOK symbols, 4 "1"s, 4 "0"s or "-1"s are sent, as shown in Table 94.

[0696] Table 93

[0697] 1 0 0 1 1 0 1 0 0 1 1 0 1 0 0 1 0 1 0 0 1 0 1 1 1 1 1 -1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 1 1 1 -1 -1 -1 1 -1 1 1 -1 1 1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 1 1 -1 -1 -1 1 -1 1 1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 1 1 -1 1

[0698] Table 94

[0699]

[0700]

[0701] For the first sequence with a length of 9, for the first type, among M = 8 OOK symbols, 5 "1"s, 3 "0"s or "-1"s are sent, as shown in Table 95.

[0702] Table 95

[0703] -1 1 1 1 1 -1 -1 1 -1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 1 1 -1 -1 1 1 1 1 -1 1

[0704] Exemplarily, when 1 OFDM symbol includes M = 8 OOK symbols, there are two choices for the length of the first sequence carried by the first signal, namely N seq = 16 + 2 or N seq= 16, occupying 2 OFDM symbols.

[0705] When N seq = 16 + 2, the first sequence occupies 18 OOK symbols, among which the number of the first type of OOK symbols is 16 and the number of the second type of OOK symbols is 2.

[0706] When N seq = 16, the first sequence occupies 16 OOK symbols, among which the number of the first type of OOK symbols is 16.

[0707] The first sequence is as follows in the table, where each row represents a first sequence. Additionally, "0", "1", and "-1" in the following table can be replaced with each other.

[0708] Optionally, "0" in the first sequence in the following tables can be replaced with "-1".

[0709] Optionally, "0" in the first sequence in the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0710] For the first sequence with a length of 16, among the first type of M = 8 OOK symbols, 1 "1", 7 "0" or "-1" are sent, as shown in Table 96. For the first sequence with a length of 18, among the first type of M = 8 OOK symbols, 1 "1", 7 "0" or "-1" are sent, as shown in Table 97.

[0711] Table 96

[0712]

[0713]

[0714] Table 97

[0715] 0 1 0 0 0 0 0 0 0 0 1 0 0 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 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0

[0716] For the first sequence with a length of 16, among the first type of M = 8 OOK symbols, 2 "1", 6 "0" or "-1" are sent, as shown in Table 98. For the first sequence with a length of 18, among the first type of M = 8 OOK symbols, 2 "1", 6 "0" or "-1" are sent, as shown in Table 99.

[0717] Table 98

[0718] 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 0 1 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1

[0719] Table 99

[0720]

[0721]

[0722] For the first sequence with a length of 16, among the M = 8 OOK symbols of the first type, 3 "1"s, 5 "0"s or "-1"s are sent, as shown in Table 100. For the first sequence with a length of 18, among the M = 8 OOK symbols of the first type, 3 "1"s, 5 "0"s or "-1"s are sent, as shown in Table 101.

[0723] Table 100

[0724] 1 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 1 0 0 1 0 0 0 1 1 0 0 1 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 1 0 1 0 0 0 1 1 0 0 1 0 0 1 0 0 1 0 1 1 -1 1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 1 -1 -1 1

[0725] Table 101

[0726] 0 1 1 0 0 1 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 0 1 1 0 0 1 0 0 1 0 0 1 0 0 0 0 1 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 0 1 0 0 1 1 0 0 1 0 0 0 1 1 0 0 0 1 0 0 1 0 0 1 0 -1 1 1 -1 1 -1 -1 -1 -1 -1 -1 1 1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 1 1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 1 -1 -1 1

[0727] For the first sequence with a length of 16, among the M = 8 OOK symbols of the first type, 4 "1"s, 4 "0"s or "-1"s are sent, as shown in Table 102. For the first sequence with a length of 18, among the M = 8 OOK symbols of the first type, 4 "1"s, 4 "0"s or "-1"s are sent, as shown in Table 103.

[0728] Table 102

[0729] 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 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 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 0 1 1 0 1 1 0 1 0 1 0 1 0 0 0 1 0 1 0 1 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 1 1 1 -1 -1 -1 -1 1 -1 1 1 -1 -1 1 -1 1 1 1 1 -1 -1 -1 -1 1 -1 1 -1 -1 1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 1 -1 -1 1 1 1 -1 1 1 1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 1 -1 1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 -1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 1 1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 -1 1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 1 1 1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 1 -1 -1 1 1 -1 1

[0730] Table 103

[0731]

[0732]

[0733] For the first sequence with a length of 16, among the M = 8 OOK symbols of the first type, 5 "1"s, 3 "0"s or "-1"s are sent, as shown in Table 104. For the first sequence with a length of 18, among the M = 8 OOK symbols of the first type, 5 "1"s, 3 "0"s or "-1"s are sent, as shown in Table 105.

[0734] Table 104

[0735]

[0736]

[0737] Table 105

[0738] -1 1 1 1 1 1 -1 -1 -1 -1 1 1 -1 1 -1 1 1 -1 -1 1 1 1 1 -1 1 -1 -1 1 1 1 1 -1 1 -1 -1 1 -1 1 1 1 1 -1 1 -1 -1 -1 -1 1 1 -1 1 1 1 -1 1 1 -1 1 -1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 1 -1 -1 1 1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 1 1 1 -1 -1 1 1 1 -1 1

[0739] Exemplarily, when there are M = 8 OOK symbols in one OFDM symbol, there are two choices for the length of the first sequence carried by the first signal, namely N seq = 24 + 3 or N seq = 24, occupying 3 OFDM symbols.

[0740] When N seq = 24 + 3, the first sequence occupies 27 OOK symbols, among which the number of the first type of OOK symbols is 24, and the number of the second type of OOK symbols is 3.

[0741] When N seq = 24, the first sequence occupies 24 OOK symbols, among which the number of the first type of OOK symbols is 24.

[0742] The first sequence is as shown in the following table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0743] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0744] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0745] For the first sequence with a length of 24, 1 "1", 7 "0"s or "-1"s are sent among the first type of M = 8 OOK symbols, as shown in Table 106. For the first sequence with a length of 27, 1 "1", 7 "0"s or "-1"s are sent among the first type of M = 8 OOK symbols, as shown in Table 107.

[0746] Table 106

[0747] 1 0 0 0 0 0 0 0 1 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 1 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 1 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 1 0 0 0 0 0 0 0 1 0

[0748] Table 107

[0749] 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 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 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 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 0

[0750] For the first sequence with a length of 24, 2 "1"s, 6 "0"s or "-1"s are sent among the first type of M = 8 OOK symbols, as shown in Table 108. For the first sequence with a length of 27, 2 "1"s, 6 "0"s or "-1"s are sent among the first type of M = 8 OOK symbols, as shown in Table 109.

[0751] Table 108

[0752]

[0753]

[0754] Table 109

[0755] 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1

[0756] For the first sequence with a length of 24, for the first type, M = 8 OOK symbols transmit 3 "1"s, 5 "0"s or "-1"s, as shown in Table 110. For the first sequence with a length of 27, for the first type, M = 8 OOK symbols transmit 3 "1"s, 5 "0"s or "-1"s, as shown in Table 111.

[0757] Table 110

[0758]

[0759]

[0760] Table 111

[0761] 0 1 0 1 0 0 1 0 0 0 1 0 0 1 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 0 1 0 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 1 0 0 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 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 1 0 0 1 0 0 1 0 0 0 1 0 1 0 0 1 0 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 1 0 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 1 0 0 0 1 0 0 1 0 1 0 1 1 -1 -1 -1 -1 1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 1 1 -1 -1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 -1 1 -1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 -1 -1 1 1 1 -1 -1 -1 -1 1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 1 1 1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 -1 -1 -1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 1 -1 -1 -1 1 -1 1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 -1 -1 -1 1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 -1 1 -1 1

[0762] For the first sequence with a length of 24, for the first type, M = 8 OOK symbols transmit 4 "1"s, 4 "0"s or "-1"s, as shown in Table 112. For the first sequence with a length of 27, for the first type, M = 8 OOK symbols transmit 4 "1"s, 4 "0"s or "-1"s, as shown in Table 113.

[0763] Table 112

[0764] 1 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 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 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 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 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 1 0 1 0 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 0 1

[0765] Table 113

[0766]

[0767]

[0768]

[0769] For the first sequence with a length of 24, for the first type, M = 8 OOK symbols transmit 5 "1"s, 3 "0"s or "-1"s, as shown in Table 114. For the first sequence with a length of 27, for the first type, M = 8 OOK symbols transmit 5 "1"s, 3 "0"s or "-1"s, as shown in Table 115.

[0770] Table 114

[0771] 1 1 1 1 -1 -1 -1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 1 1 -1 1 -1 1 1 1 -1 -1 -1 1 1 -1 1 -1 1 1 -1 1 1 1 1 1 1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 1 -1 1 -1 -1 1 1 1 1 1 1 -1 1 1 -1 1 -1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 1 1 -1 -1 -1 1 1 1 1 -1 1 -1 1 1 -1 -1 -1 1 1 1 1 -1 1 -1 -1 1 1 1 1 1 -1 1 1 -1 1 -1 1 1 -1 -1 -1 1 1 1 -1 1 -1 1 1 -1 1 1 1 1 1 1 -1 -1 1 -1 1 -1 1 1 1 1 -1 -1 1 1 1 -1 -1 1 -1 1 -1 -1 1 -1 1 1 1 1 1 -1 1 1 1 1 -1 -1 -1 1 1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 -1 1 -1 1 1 1 -1 -1 1 1 -1 1 1 1 1 1 1 -1 -1 -1 -1 1 1 1 1 -1 1 -1 -1 1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 1 -1 1 1 1 1 -1 1 -1 -1 -1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 1 1 -1 1 1 1 1 -1 1 -1 -1 -1 1 1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 -1 1 1 1 1 -1 1 -1 -1 -1 1 1 -1 1 1 1 -1 -1 1 -1 1 1 1 1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 1 1 1

[0772] Table 115

[0773] 1 1 1 1 1 -1 -1 -1 1 1 1 -1 1 -1 -1 1 1 1 -1 1 1 -1 1 1 -1 1 -1 1 1 1 1 -1 -1 -1 1 1 1 -1 1 -1 1 1 -1 1 1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 1 -1 -1 -1 1 1 1 -1 1 -1 -1 1 1 1 1 -1 1 1 -1 1 1 -1 1 -1 1 1 1 -1 -1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 1 -1 1 -1 1 1 1 -1 -1 -1 1 1 1 1 1 -1 1 -1 -1 1 1 1 -1 1 1 -1 1 1 -1 1 -1 1 1 1 -1 -1 -1 1 1 1 1 -1 1 -1 1 1 -1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 1 -1 1 1 1 1 -1 -1 1 1 1 1 -1 -1 1 -1 1 1 -1 -1 1 -1 1 1 1 1 -1 1 -1 1 1 1 1 -1 -1 -1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 1 1 -1 1 1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 1 -1 1 1 1 -1 1 -1 -1 1 -1 1 1 1 1 -1 -1 1 1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 1 1 1 1 -1 1 -1 -1 1 1 1 -1 -1 1 1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 1 -1 -1 1 1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 1 1 1 -1 -1 1 -1 1 1 1 1 -1 -1 1 1 1 1 -1 1 -1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 1 1 -1 1 1 1

[0774] Exemplarily, when there are M = 8 OOK symbols in one OFDM symbol, there are two choices for the length of the first sequence carried by the first signal, namely N seq = 32 + 4 or N seq = 32, occupying 4 OFDM symbols.

[0775] When N seq = 32 + 4, the first sequence occupies 36 OOK symbols, among which the number of the first type of OOK symbols is 32, and the number of the second type of OOK symbols is 4.

[0776] When N seq = 32, the first sequence occupies 32 OOK symbols, among which the number of the first type of OOK symbols is 32.

[0777] The first sequence is as shown in the following table, where each row represents a first sequence. In addition, "0", "1", and "-1" in the following table can be replaced with each other.

[0778] Optionally, "0" in the first sequence in each of the following tables can be replaced with "-1".

[0779] Optionally, "0" in the first sequence in each of the following tables can be replaced with "1", and at the same time, "1" can be replaced with "-1".

[0780] For the first sequence with a length of 32, 1 "1", 7 "0"s or "-1"s are sent among the first type of M = 8 OOK symbols, as shown in Table 116. For the first sequence with a length of 36, 1 "1", 7 "0"s or "-1"s are sent among the first type of M = 8 OOK symbols, as shown in Table 117.

[0781] Table 116

[0782] 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 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 1 0 0 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 1 0 0 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 1 0

[0783] Table 117

[0784] 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 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 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 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

[0785] For the first sequence with a length of 32, 2 "1"s, 6 "0"s or "-1"s are sent among the first type of M = 8 OOK symbols, as shown in Table 118. For the first sequence with a length of 36, 2 "1"s, 6 "0"s or "-1"s are sent among the first type of M = 8 OOK symbols, as shown in Table 119.

[0786] Table 118

[0787] 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1 0 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 1

[0788] Table 119

[0789] 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 1 0 0 0 1 0 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1

[0790] For the first sequence with a length of 32, in the first type, among 8 OOK symbols, 3 "1"s, 5 "0"s or "-1"s are sent, as shown in Table 120. For the first sequence with a length of 36, in the first type, among 8 OOK symbols, 3 "1"s, 5 "0"s or "-1"s are sent, as shown in Table 121.

[0791] Table 120

[0792] 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 1 0 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 1 0 0 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 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 1 0 0 1 0 0 1 0 0 1 0 1 -1 1 -1 1 -1 -1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 1 1 -1 1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 1 1 -1 -1 1 -1 -1 1 -1 -1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 -1 1 -1 -1 1 -1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 -1 -1 1 1 1 -1 1 -1 -1 1 1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 -1 1 -1 -1 1

[0793] Table 121

[0794] 0 1 0 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 0 1 1 0 0 1 0 0 0 1 0 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 1 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 1 0 0 0 1 0 0 1 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 1 0 0 0 1 0 0 1 1 0 0 0 1 0 0 1 0 0 1 0 -1 1 -1 1 -1 1 -1 -1 -1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 -1 1 1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 1 -1 1 -1 -1 -1 -1 -1 -1 1 -1 1 1 -1 -1 -1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 -1 1 1 -1 -1 -1 1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 -1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 -1 -1 -1 -1 1 -1 -1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 1 1 -1 1 -1 -1 -1 -1 1 1 -1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 -1 1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 1 -1 -1 1 1 -1 -1 -1 1 -1 1 -1 -1 1 -1 1 -1 -1 1

[0795] For the first sequence with a length of 32, in the first type, among 8 OOK symbols, 4 "1"s, 4 "0"s or "-1"s are sent, as shown in Table 122. For the first sequence with a length of 36, in the first type, among 8 OOK symbols, 4 "1"s, 4 "0"s or "-1"s are sent, as shown in Table 123.

[0796] Table 122

[0797] 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 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 1 1 -1 1 -1 -1 -1 1 -1 1 1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 1 1 1 -1 1 -1 -1 -1 1 1 1 -1 1 -1 -1 -1 1 -1 1 1 -1 -1 1 1 -1 -1 -1 -1 1 -1 1 1 1 1 1 -1 1 -1 -1 -1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 -1 1 -1 -1 1 -1 1 -1 1 1 -1 1 1 -1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 -1 -1 1 -1 -1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 -1 1 -1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 1 1 -1 1 1 -1 -1 -1 1 -1 1 -1 -1 1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 1 1 1 1 -1 -1 -1 1 -1 -1 1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 1 1 1 -1 -1 1 -1 -1 -1 -1 1 1 -1 1 1 -1 -1 -1 -1 -1 1 1 1 1 1 -1 1 -1 -1 -1 1 1 -1 1 1 -1 1 -1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 1 -1 -1 1 1 1 -1 1 1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1

[0798] Table 123

[0799] 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 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 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 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 0 1 1 1 -1 1 -1 -1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 1 -1 1 -1 -1 -1 1 1 1 1 1 1 -1 1 -1 -1 -1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 1 1 -1 -1 1 1 -1 1 -1 -1 -1 1 -1 1 1 1 1 1 1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 -1 1 -1 1 1 1 1 -1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 -1 1 1 -1 -1 1 -1 1 -1 1 -1 1 -1 1 1 -1 1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 1 -1 -1 -1 -1 1 1 -1 -1 -1 1 1 -1 1 1 -1 1 -1 1 1 -1 -1 1 -1 -1 1 1 1 -1 1 -1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 -1 -1 1 1 -1 1 -1 1 -1 1 1 -1 -1 1 -1 1 -1 -1 -1 1 1 1 1 1 1 1 -1 -1 -1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 1 -1 1 -1 1 -1 -1 1 1 -1 1 -1 1 1 1 -1 -1 -1 -1 -1 -1 -1 1 1 1 1 -1 1 1 -1 -1 1 -1 -1 1 1 1 -1 1 -1 -1 1 1 -1 1 1 -1 -1 -1 1 -1 1 1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 1 1 1 1 -1 -1 1 -1 1 -1 -1 1 -1 1 1 1 1 1 -1 1 -1 -1 -1 1 -1 -1 -1 -1 1 1 1 1 -1 -1 1 1 1 -1 -1 1 -1 -1 -1 -1 -1 1 1 -1 1 1 -1 1 -1 -1 -1 -1 1 1 1 1 1 1 -1 1 -1 -1 -1 1 1 -1 -1 1 1 -1 1 -1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 1 -1 -1 1 1 -1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1 -1 -1 -1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 -1 1 1 -1 1 -1 1 1 1 -1 -1 -1 -1 -1 -1 1 -1 1 1 1 -1

[0800] For the first sequence with a length of 32, in the first type, among 8 OOK symbols, 5 "1"s, 3 "0"s or "-1"s are sent, as shown in Table 124. For the first sequence with a length of 36, in the first type, among 8 OOK symbols, 5 "1"s, 3 "0"s or "-1"s are sent, as shown in Table 125.

[0801] Table 124

[0802] -1 1 -1 1 -1 1 1 1 -1 -1 1 1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 -1 1 1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1 1 1 1 1 -1 1 -1 -1 1 1 1 1 1 1 -1 -1 -1 1 -1 1 1 -1 -1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 -1 1 -1 1 1 1 -1 1 -1 -1 -1 1 1 -1 1 1 1 -1 1 -1 1 1 1 -1 1 1 1 -1 -1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 -1 -1 1 1 1 1 1 -1 1 -1 1 -1 1 1 1 1 1 -1 1 -1 -1 1 1 1 -1 -1 1 1 -1 1 1 -1 1 1 1 1 1 -1 -1 1 1 1 1 -1 -1 -1 1 -1 -1 1 1 1 1 1 -1 1 -1 -1 1 1 1 -1 1 1 1 -1 1 -1 1 1 -1 1 1 -1 1 1 -1 -1 1 -1 -1 1 1 1 1 1 -1 1 -1 1 1 1 1 -1 -1 -1 1 -1 1 1 1 -1 1

[0803] Table 125

[0804] 1 -1 1 -1 1 -1 1 1 1 1 -1 -1 1 1 -1 1 1 1 1 1 1 -1 -1 1 -1 1 1 -1 -1 1 1 1 1 1 -1 -1 1 -1 1 -1 1 1 1 -1 1 1 1 1 1 -1 1 -1 -1 1 -1 1 1 1 1 1 -1 -1 -1 1 1 -1 1 1 -1 -1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 -1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 1 -1 1 -1 1 -1 -1 1 1 -1 1 1 1 1 -1 1 -1 1 1 1 -1 1 1 1 1 -1 -1 1 -1 1 1 -1 -1 1 1 1 -1 1 1 -1 1 -1 -1 -1 1 1 1 1 1 1 -1 1 -1 1 -1 1 1 1 1 1 1 -1 1 -1 -1 1 1 1 1 -1 -1 1 1 -1 1 1 -1 -1 1 1 1 1 1 -1 -1 1 1 1 1 1 -1 -1 -1 1 -1 -1 -1 1 1 1 1 1 -1 1 1 -1 -1 1 1 1 -1 1 -1 1 1 -1 1 -1 1 1 -1 1 1 1 -1 1 1 -1 -1 1 -1 -1 -1 1 1 1 1 1 -1 -1 1 -1 1 1 1 1 -1 -1 1 -1 1 -1 1 1 1 -1 1

[0805] In one embodiment, the first signal includes M OOK symbols in at least one OOK symbol in the time domain. When M>1, the lengths of the M OOK symbols satisfy at least one of the following:

[0806] The sequences in Table 1 - Table 125 above are illustrated by taking the first sequence as an example. For the second sequence or the third sequence, they can also be generated based on the sequences in Table 1 - Table 125.

[0807] The lengths of the M OOK symbols from the second OOK symbol to the Mth OOK symbol 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 configurable or a predefined value;

[0808] The first OOK symbol includes at least the cyclic prefix of the OFDM symbol;

[0809] 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 configurable or a predefined value.

[0810] In the embodiments of the present application, M OOK symbols in one OFDM symbol are used for illustration. The first signal may occupy multiple OFDM symbols in the time domain, and each OFDM symbol includes M OOK symbols.

[0811] That is, when M>1, the special generation method of the first signal Figure 9 is the fifth signal generation schematic diagram provided by the embodiments of the present application. Figure 9 In it, 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. Where 0≤i≤M - 1 and i is an integer. Figure 9 In it, T CP is the number of time domain sampling points occupied by the CP.

[0812] In one embodiment, the first signal includes M OOK symbols in at least one OOK symbol in the time domain. When M>1, based on the first data (that is, Figures 1-3 Q in the illustrated embodiment K ), the time domain expression of the first signal in the M OOK symbols is generated, and the first data satisfies at least one of the following:

[0813] Among the M second data that make up the first data, 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 configurable or a predefined value.

[0814] The length of the first second data is less than or equal to the lengths of the other M - 1 second data;

[0815] The sum of the lengths of the M second data is K, where K is less than or equal to the number of frequency domain sub - carriers configured by the first signal.

[0816] The above two cases where M > 1 correspond to the following two cases:

[0817] 1. The lengths of these M OOK symbols need to satisfy at least one of the following

[0818] (1) For the length of the i - th OOK symbol, when 1 ≤ i ≤ M - 1, T i takes the same or approximately the same value;

[0819] (2) The length of the first OOK symbol is UT 0 = T 0 + T CP ;

[0820] (3) UT 0 and T i take the same or approximately the same value, where 1 ≤ i ≤ M - 1.

[0821] N OOK =(N FFT + N CP ) / M

[0822] N1 OOK = N OOK / N ScalingFactor

[0823] N2 OOK =(N OOK - N CP ) / N ScalingFactor

[0824] 2. For the data information Q in the background art K , the following further restrictions are imposed, including at least one of the following:

[0825] (1) When 1 ≤ i ≤ M - 1, A i takes the same or approximately the same value;

[0826] (2) A 0 = A i - T CP / N ScalingFactor , where T CP / N ScalingFactor can be or That is, for T CP / N ScalingFactorRounding up or rounding down.

[0827] Wherein, A 0 + A 1 + … A i + … + A M-1 = K, where K is Figures 1-3 the K in the illustrated embodiment.

[0828] Wherein, N ScalingFactor is an integer and can be configured.

[0829] Preferably, N ScalingFactor = N FFT / K, or N ScalingFactor = 4 or 8 or 16. Where N FFT is the number of points of FFT or IFFT transformation and can be configured.

[0830] In the embodiments of the present application, three sequences including a first sequence, a second sequence, and a third sequence, and three types of data including first data, second data, and third data are involved. The length configurations of the above-mentioned first sequence, second sequence, third sequence, first data, second data, and third data in the frequency domain will be described below. Among them, a fourth data is defined, and the fourth data includes at least one of the following: first data, second data, third data, first sequence, second sequence, and third sequence.

[0831] In one embodiment, when the subcarrier spacing configured for the first signal is 30 kHz or 120 kHz, the length of the fourth data is configured according to any one of the following configuration methods:

[0832] 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 configured for the first signal is 30 kHz or 120 kHz is less than or equal to TH4, where the value of TH4 can be configured or is 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 configured for the first signal is 30 kHz or 120 kHz;

[0833] The difference between the length of the fourth data when the subcarrier spacing is 15 kHz or 60 kHz and twice the repetition of the length of the fourth data when the subcarrier spacing configured for the first signal is 30 kHz or 120 kHz is less than or equal to TH5, where the value of TH5 can be configured or is a predefined value; that is, the length of the fourth data when the subcarrier spacing is 15 kHz or 60 kHz is twice the repetition or approximately twice the repetition of the length of the fourth data when the subcarrier spacing configured for the first signal is 30 kHz or 120 kHz.

[0834] Preferably, the value of TH4 is 0; preferably, the value of TH5 is 0.

[0835] Specifically, when the SCS of the first signal configuration is 30 kHz or 120 kHz, the value of the data can be configured, where 0 ≤ i ≤ M - 1. Then when the SCS of the first signal configuration is 15 or 60 kHz, the data W i has a length that 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 configuration is 15 or 60 kHz, the data W i is a double repetition of the data W i when the SCS is 30 kHz or 120 kHz.

[0836] In one embodiment, when the subcarrier spacing of the first signal configuration is 15 kHz or 60 kHz, the length of the fourth data is configured according to any one of the following configuration methods:

[0837] The length of the fourth data when the subcarrier spacing is 30 kHz or 120 kHz is 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;

[0838] The length of the fourth data when the subcarrier spacing is 30 kHz or 120 kHz or when the subcarrier spacing is 15 kHz or 60 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.

[0839] Specifically, when the SCS of the first signal configuration is 15 kHz or 60 kHz, the value of the data can be configured, where 0 ≤ i ≤ M - 1. Then when the SCS of the first signal configuration is 30 kHz or 120 kHz, the data W i has a length that is part or half of the length of the data W i when the SCS is 15 kHz or 60 kHz. Further, when the SCS of the first signal configuration is 30 kHz or 120 kHz, and the SCS is 15 or 60 kHz, the data W i is the first half or the second half of the data W i when the SCS is 15 kHz or 60 kHz.

[0840] In one embodiment, there is a spacing of H subcarriers between the a-th element and the (a + 1)-th element in a fourth data.

[0841] In one embodiment, the value of H is determined by the configured frequency-domain subcarrier spacing size or the frequency-domain subcarrier spacing index of the first signal.

[0842] In one embodiment, the fourth data satisfies at least one of the following:

[0843] When the subcarrier spacing is 15 kHz and M is 4, the fourth data 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;

[0844] When the subcarrier spacing is 15 kHz and M is 2, the fourth data 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;

[0845] When the subcarrier spacing is 15 kHz and M is 1, the fourth data configures an independent sequence set or sequence length;

[0846] When the subcarrier spacing is 30 kHz and M is 4, the fourth data configures an independent sequence set or sequence length.

[0847] In one embodiment, the fourth data satisfies at least one of the following:

[0848] When the subcarrier spacing is 30 kHz and M is 4, the configuration of the fourth data is the same as the configuration of the fourth data when the subcarrier spacing is 120 kHz and M is 1;

[0849] When the subcarrier spacing is 15 kHz and M is 4, the configuration of the fourth data is the same as the configuration of the fourth data when the subcarrier spacing is 60 kHz and M is 1.

[0850] Specifically, the configuration of the third data with SCS = 30 and M = 4 can be used for SCS = 120 and M = 1. The configuration of the third data with SCS = 15 and M = 4 can be used for the corresponding SCS = 60 and M = 1.

[0851] When then

[0852] The second data is The third data is where 0 ≤ i ≤ M - 1.

[0853] Preferably, it is a ZC sequence, or a sequence composed of a ZC sequence and its cyclic shift elements, or a sequence composed of a ZC sequence and padding elements.

[0854] Preferably, The length at i = 0 is less than the length at i > 0.

[0855] For example, when the subcarrier spacing SCS corresponding to the frequency-domain resources configured for the first signal is 30 kHz or 15 kHz, and the configured frequency-domain resources are 11 PRBs, which altogether include 132 subcarriers, then, A 0 +A 1 +…A i +…+A M-1 The preferred combinations of include at least one of the following:

[0856] (1) When M = 4, A0 = 27, A1 = A2 = A3 = 35, then K = 27 + 35 * 3 = 132.

[0857] (2) When M = 2, A0 = 62, A1 = 70, then K = 62 + 70 = 132.

[0858] (3) When M = 4, A0 = 26, A1 = A2 = A3 = 35, then K = 26 + 35 * 3 = 131.

[0859] (4) When M = 2, A0 = 61, A1 = 70, then K = 61 + 70 = 131.

[0860] (5) When M = 4, A0 = 26, A1 = A2 = A3 = 34, then K = 26 + 34 * 3 = 128.

[0861] (6) When M = 2, A0 = 60, A1 = 68, then the total number of SC = 60 + 68 = 128.

[0862] (7) When M = 4, A0 = 25, A1 = A2 + A3 = 34, then K = 25 + 34 * 3 = 127.

[0863] (8) When M = 2, A0 = 59, A1 = 68, then K = 59 + 68 = 127.

[0864] In one embodiment, the first signal occupies M OOK symbols in at least one OOK symbol in the time domain. When M > 1, a time-domain expression of the first signal is generated based on the first data, and the first data satisfies at least one of the following:

[0865] Among the M second data that make up the first data, the elements in the first J1 second data and the last J2 second data are zero elements, where both J1 and J2 are integers greater than or equal to 1;

[0866] Among the M second data that make up the first data, the elements in the first J1 second data and the last J2 second data are the same;

[0867] Among the M second data that make up the first data, the or or or or or the elements in the second data are zero elements or predefined elements, where represents rounding down represents rounding up.

[0868] Here, regarding Figures 1-3 the data information Q in the illustrated embodiment K Es mentioned during the generation of i is further described, including at least one of the following:

[0869] the data information transmitted on M OOK symbols is S M , S M includes M elements, that is, S M has a length of M, denoted as S M = [s 0 , s 1 , s 2 , s 3 ..., s M-1 .

[0870] Based on the element s M in the data information S i generate Es i .

[0871] When i ≤ J1, the elements in Es i are all zero elements;

[0872] When i ≥ J2, the elements in Es i are all zero elements;

[0873] When J1 < i < J2, generate Es i according to the background technology.

[0874] In one embodiment, before sending the first signal, it further includes: obtaining the fifth data according to the first data; when mapping the fifth data to the frequency-domain subcarriers, among the K fifth data that make up the fifth data, the i-th element and the (i + 1)-th element are separated by H subcarriers, where 0 ≤ i ≤ K - 2. The first data can be obtained by performing a K-point FFT / DFT transformation on the fifth data.

[0875] Specifically, perform a K-point DFT / FFT operation on the data information Q K to obtain the data information D K = [d 0 , d 1 , d 2 , d 3 ,..., d K-1 , DK When mapping to frequency-domain subcarriers, the following scheme is adopted: d i and d i+1 are separated by H subcarriers, where 0 ≤ i ≤ K - 2. The information filled on the H subcarriers is preferably the 0 element.

[0876] For example: The data information Q K is subjected to a K-point DFT / FFT operation to obtain the data information D K = [d 0 , d 1 , d 2 , d 3 ,..., d K-1 , D K When mapping to frequency-domain subcarriers, it needs to be mapped to (H + 1)*K subcarriers. The specific mapping method is as follows

[0877] or

[0878]

[0879] In one embodiment, the value of H is determined by the configured frequency-domain subcarrier spacing size or the frequency-domain subcarrier spacing index of the first signal.

[0880] For example, the carrier spacing index and the corresponding subcarrier spacing size are shown in Table 126.

[0881] Table 126

[0882] μ <![CDATA[Δf = 2 μ ·15 [kHz]]]> 0 15 1 30 2 60 3 120 4 240

[0883] The number of H is determined by the value of the frequency-domain subcarrier spacing index (μ).

[0884] For example, when μ = 0, the corresponding Δf, that is, the subcarrier spacing (SCS), is SCS = 15 kHz, and at this time H = 1

[0885] For example, when μ = 1, the corresponding SCS = 30 kHz, and at this time H = 0

[0886] For example, when μ = 2, the corresponding SCS = 60, and at this time H = 1

[0887] For example, when μ = 3, the corresponding SCS = 120 kHz, and at this time H = 0

[0888] For example:

[0889] When the configured frequency-domain subcarrier spacing size of the first signal is SCS = 15 kHz, H = 1.

[0890] When the subcarrier spacing size of the first signal configuration is SCS = 30 kHz, H = 0.

[0891] When the subcarrier spacing size of the first signal configuration is SCS = 60 kHz, H = 1.

[0892] When the subcarrier spacing size of the first signal configuration is SCS = 120 kHz, H = 0.

[0893] In one embodiment, the first sequence, the second sequence, and the third sequence mentioned in the above embodiments can also be used as the downlink synchronization sequence of the passive Internet of Things (Ambient Internet of Things, Ambient-IoT) or the synchronization sequence of the uplink (from device to reader) (including the preamble, the midamble, and the postamble).

[0894] Internet of Things devices can be divided into mostly passive (without batteries), and the considerations in signaling design and transmission are different from those of active terminals such as mobile phones. For passive Ambient-IoT (A-IOT) devices, the base station (or excitation source) needs to continuously send high levels to the functions of the Internet of Things devices or activate / charge the Internet of Things devices. After the Internet of Things devices are activated, they receive the downlink signaling sent by the base station and send the uplink signaling to the base station.

[0895] In the research of A-IOT, Internet of Things devices (A-IoT devices) are considered to be tags, etc. The device type is divided into 3 categories. Type 1 device: power consumption ~ 1 μW, without downlink (DL) or uplink (UL) amplifiers, and feeds back the uplink signal through backscatter. Type 2a device: power consumption ≤ a few hundred μW, with DL and / or UL amplifiers, and feeds back the uplink signal through backscatter. Type 2b device: power consumption ≤ a few hundred μW, with DL and / or UL amplifiers, and autonomously generates the uplink signal.

[0896] In the research of A-IoT, the device 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 devices. In A-IoT communication, since A-IoT devices are simple and cannot continuously maintain the synchronization between A-IoT devices and readers, therefore, before each uplink (from A-IoT device to reader) / downlink (from reader to A-IoT device) communication, it may be necessary to send a synchronization sequence for synchronization.

[0897] Figure 10 A structural schematic diagram of a signal sending device provided by an embodiment of the present application, as Figure 10 shown, the signal sending device provided by this embodiment includes:

[0898] A generating module 101, 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 sending module 102, configured to send the first signal.

[0899] The signal sending device provided by this embodiment is arranged on the network side and is used to execute Figure 4 the signal sending method of the embodiment shown, and its implementation principle and technical effect are similar, which will not be elaborated here.

[0900] Figure 11 A structural schematic diagram of a signal sending device provided by an embodiment of the present application, as Figure 11 shown, the signal sending device includes a processor 111, a memory 112, a receiver 113, and a transmitter 114; the number of processors 111 in the signal sending device can be one or more, Figure 11 taking one processor 111 as an example; 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 means, Figure 11 taking the connection through a bus as an example.

[0901] The memory 112, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the Figure 2 program instructions / modules (generating module 101, sending module 102) corresponding to the signal sending method in the embodiment of the present application. The processor 111 runs the software programs, instructions, and modules stored in the memory 112, thereby applying various functions and data processing of the signal sending device, that is, implementing the above-mentioned signal sending method.

[0902] The memory 112 may mainly include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the signal sending device, etc. In addition, the memory 112 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0903] The receiver 113 is any device / module with data receiving capabilities or a combination of multiple devices / modules with data receiving capabilities, and the transmitter 114 is any device / module with data sending capabilities or a combination of multiple devices / modules with data sending capabilities.

[0904] The embodiment of the present application further provides a non-volatile storage medium. The storage medium includes a stored program, and is characterized in that when the program runs, it executes a signal sending method, and the method includes: generating a first signal according to at least one first sequence, where the first signal occupies at least one OFDM symbol or at least one OOK symbol in the time domain; and sending the first signal.

[0905] In this embodiment, the above storage medium may include but is not limited to: USB flash drives, read-only memories (ROMs), random access memories (RAMs), external hard drives, magnetic disks, or optical discs, etc., various media that can store program codes.

[0906] Those of ordinary skill in the art can understand that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, and their appropriate combinations. In the hardware implementation, the division of the functional modules / units mentioned above 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 executed by several physical components in cooperation. Some or all components can be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or be implemented as hardware, or be implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or a non-transitory medium) and a communication medium (or a transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing 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 technologies, CD-ROM, digital versatile discs (DVDs), or other optical disc storage, magnetic cartridges, tapes, magnetic disk storage, or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium generally contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0907] Although the embodiments disclosed in this application are as above, the content thereof is only an embodiment adopted for facilitating the understanding of the technical solution of this application, and is not used to limit this application. Any person skilled in the art within the technical field to which this application pertains may make any modifications and changes in the form of implementation and details without departing from the core technical solution disclosed in this application. However, the scope of protection defined by this application shall still be subject to the scope defined by the appended claims.

Claims

1. A signal sending method, characterized in that: include: 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; The first signal is sent.

2. The method according to claim 1, characterized in that The generating a first signal according to at least one first sequence comprises: generating a second sequence according to the first sequence; generating the first signal according to the second sequence; The second sequence includes the first sequence and at least one of the following: at least one fill element; At least one element of the first sequence.

3. The method according to claim 1, characterized in that The first signal sends data information including M elements in M ​​OOK symbols; Wherein, the resources occupied by the M OOK symbols are in one OFDM symbol; Wherein, M is an integer greater than 0.

4. The method according to claim 3, characterized in that The M elements include at least one non-zero element.

5. The method according to claim 3, characterized in that: The first element and the last element of the M elements carry the same information.

6. The method according to claim 3, characterized in that: The M elements include A first-category elements and B second-category elements, and A and B satisfy at least one of the following: A is the same as B; The difference between A and B is 1; The difference between A and B is 2; The difference between A and B is less than or equal to M / 2; The difference between A and B is less than or equal to M / 4.

7. The method according to claim 6, characterized in that The combination of the first type of elements and the second type of elements includes at least one of the following: The first type of elements are zero elements, and the second type of elements are non-zero elements; The first type element is -1, and the second type element is 1. The first type element is 0, and the second type element is 1.

8. The method according to claim 6, characterized in that include: 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 according to claim 1, characterized in that: The first sequence includes the third sequence and at least one of the following: at least one fill element; at least one element in the third sequence.

10. The method according to claim 9, characterized in that The first sequence adopts Manchester encoding.

11. The method according to claim 7, characterized in that When the first sequence includes multiple groups of data information of the M elements, the number of the second-category elements in the multiple groups of data information of the M elements is the same or the difference in the number of the second-category elements in the multiple groups of data information of the M elements is less than or equal to TH0, where the value of TH0 is configurable or a predefined value.

12. The method according to claim 1, characterized in that The first sequence satisfies at least one of the following: When d is greater than 0, Corr1 A,d Less than or equal to the first threshold; When d is greater than 0, Corr2 A,d Less than or equal to the second threshold; When d is greater than 0, |Corr1 A,d |Less than or equal to the third threshold; When d is greater than 0, |Corr2 A,d |Less than or equal to the 4th threshold; When d is greater than 0, Corr1 A,d / AutoCorr A Less than or equal to the fifth threshold; When d is greater than 0, Corr2 A,d / AutoCorr A Less than or equal to the sixth threshold; When d is greater than 0, |Corr1 A,d / AutoCorr A |Less than or equal to the 7th threshold; When d is greater than 0, |Corr2 A,d / AutoCorr A |Less than or equal to the 8th threshold; in, or or 0 <d≤L,L≤N A ; or Wherein, the first sequence is Seq A express, Among them, the Seq A The length is N A .

13. The method according to claim 12, characterized in that The value of d is at least one of the following: {1}，{1，2}，{1，2，3}，{1，2，3，4}。 14. The method according to claim 12, characterized in that Include at least one of the following: 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, characterized in that: A portion of the elements in the first sequence are sent in OOK symbols of a first type, and another portion of the elements are sent in OOK symbols of a second type; The time domain position of the first type of OOK symbol is located in the OFDM symbol, and the data position of the second type of OOK symbol is located in the cyclic prefix of the OFDM symbol.

16. The method according to claim 15, characterized in that The second type of OOK symbols occupies all or part of the time domain resources of the cyclic prefix of the OFDM symbol.

17. The method according to claim 15, characterized in that The first type of OOK symbols and the second type of OOK symbols occupy the same frequency domain resources.

18. The method according to claim 15, characterized in that The elements carried by the second-type OOK symbol are the same as the elements in the first sequence carried by the last first-type OOK symbol among the M first-type OOK symbols in the corresponding OFDM symbol.

19. The method according to claim 15, characterized in that The time domain representation of the second type of OOK symbol is generated as follows: Generate a time domain expression of a first length based on the time domain expression of the last OOK symbol of the first type in the M OOK symbols of the first type in the corresponding OFDM symbol; Or it is generated based on a time domain expression of a 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.

20. The method according to claim 15, characterized in that When the first signal occupies Y OFDM symbols, and one OFDM symbol includes M OOK symbols of the first type and one OOK symbol of the second type, the method includes at least one of the following: The at least one first sequence is carried by Y*M first-type OOK symbols; The at least one first sequence is carried by Y*M first-type OOK symbols and Y second-type 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, characterized in that: The first signal includes M OOK symbols of the at least one OOK symbol 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: The lengths of the M OOK symbols from the second OOK symbol to the Mth OOK symbol are the same or the difference between the second OOK symbol and the Mth OOK symbol is less than or equal to TH1, where the value of TH1 is configurable 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 other M-1 OOK symbols, and the difference between other M-1 OOK symbols is less than or equal to TH2, where the value of TH2 is configurable or a predefined value.

22. The method according to any one of claims 1 to 14, characterized in that: The first signal includes M OOK symbols of the at least one OOK symbol in the 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 first data, and the first data satisfies at least one of the following: Among the M second data constituting the first data, the lengths 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, wherein the value of TH3 is configurable or a predefined value. The length of the first second 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 is K, where K is less than or equal to the number of frequency domain subcarriers configured for the first signal.

23. The method according to claim 22, characterized in that The second data is generated based on 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 according to claim 1, characterized in that When the subcarrier spacing of the first signal configuration is 30 kHz or 120 kHz, the length of the fourth data is configured according to any one 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 configured by the first signal is 30 kHz or 120 kHz is less than or equal to TH4, where the value of TH4 is configurable or a predefined value; The difference between the length of the fourth data when the subcarrier spacing is 15kHz or 60kHz and the length after two repetitions of the fourth data length when the subcarrier spacing configured by the first signal is 30kHz or 120kHz is less than or equal to TH5, where the value of TH5 is configurable or a predefined value; The fourth data includes at least one of the following: first data, second data, third data, a first sequence, a second sequence, and a third sequence.

25. The method according to claim 1, characterized in that When the subcarrier spacing of the first signal configuration is 15 kHz or 60 kHz, the length of the fourth data is configured according to any one of the following configuration modes: When the subcarrier spacing is 30 kHz or 120 kHz, the length of the fourth data 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; When the subcarrier spacing is 30 kHz or 120 kHz or the subcarrier spacing is 15 kHz or 60 kHz, the length of the fourth data 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, a first sequence, a second sequence, and a third sequence.

26. The method according to claim 24 or 25, characterized in that There are H subcarriers between the ath element and the a+1th element in the fourth data.

27. The method according to claim 26, characterized in that The value of H is determined by the frequency domain subcarrier spacing size or the frequency domain subcarrier spacing index configured for the first signal.

28. The method according to claim 1, characterized in that The fourth data satisfies at least one of the following: The fourth data when the subcarrier spacing is 15 kHz and M is 4 and the fourth data when the subcarrier spacing is 30 kHz and M is 2 use the same sequence set or the same sequence length; The fourth data when the subcarrier spacing is 15 kHz and M is 2 and the fourth data when the subcarrier spacing is 30 kHz and M is 1 use the same sequence set or the same sequence length; The fourth data configuration when the subcarrier spacing is 15 kHz and M is 1 is an independent sequence set or sequence length; The fourth data configuration when the subcarrier spacing is 30 kHz and M is 4 is an independent sequence set or sequence length; The fourth data includes at least one of the following: first data, second data, third data, a first sequence, a second sequence, and a third sequence.

29. The method according to claim 1, characterized in that 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 following: first data, second data, third data, a first sequence, a second sequence, and a third sequence.

30. The method according to any one of claims 1 to 14, characterized in that: The first signal occupies M OOK symbols in the at least one OOK symbol in the 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 first data, and the first data satisfies at least one of the following: Among 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, wherein J1 and J2 are both integers greater than or equal to 1; Among 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 or or or or or The elements in the second data are zero elements or predefined elements, where Indicates rounding down. Indicates rounding up.

31. The method according to any one of claims 1 to 14, characterized in that: Before sending the first signal, the method further includes: Obtain fifth data according to the first data; When the fifth data is mapped to frequency domain subcarriers, among the K fifth data constituting the fifth data, an i-th element and an i+1-th element are spaced by H subcarriers, where 0≤i≤K-2.

32. The method according to claim 31, characterized in that The value of H is determined by the frequency domain subcarrier spacing size or the frequency domain subcarrier spacing index configured for the first signal.

33. A signal sending device, characterized in that: include: 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 sending module is configured to send the first signal.

34. A signal sending device, characterized in that: include: a memory configured to store a program; A processor is configured to execute a program, and when the program is executed, the signal sending method according to any one of claims 1 to 32 is performed.

35. A non-volatile storage medium, the storage medium comprising a stored program, characterized in that: When the program is executed, the signal sending method according to any one of claims 1 to 32 is executed.

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