Single-symbol joint sensing and communication integrated waveform generation, transmission and reception method, system and medium

Abstract

The application belongs to the technical field of communication and sensing, and specifically discloses a generation, transmission and reception method, system and medium of a single-symbol communication and sensing integrated waveform, wherein the generation and transmission method selects different Flag detection windows according to the sensing distance, adopts a puncturing mapping method, maps the time-frequency sequence to the blank position of the frequency domain comb according to the Flag, and obtains different repeated waveforms through time domain single-symbol period repetition; the reception method sets interval communication time slots and sensing time slots, performs communication reception in the communication time slots, performs sensing reception in the sensing time slots, and performs waveform merging and superposition according to the Flag during communication reception; and performs waveform truncation processing according to the Flag during sensing reception. By adopting the technical scheme, a Flag flag bit is added, and the transmission and reception perform different waveform generation and reception interception according to the Flag signal, a single-symbol far, middle and near transmission mapping and reception interception method is proposed, symbol interference is resisted, and time efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of communication sensing technology, and relates to a method, system and medium for generating, transmitting and receiving a single-symbol integrated sensing waveform. Background Technology

[0002] Research on the integration of communication and sensing has received widespread attention from academia and the wireless communication industry in recent years. Spectrum sharing between radar and communication can maximize the use of frequency band resources, enabling both systems to achieve greater bandwidth. Sharing hardware devices, including antenna arrays, RF transceiver components, and signal processing modules, between the two systems can significantly reduce the system's size, weight, power consumption, and price, saving costs and resources while improving system portability.

[0003] How to enable integrated systems to achieve better communication and sensing performance with lower resource consumption from the perspective of signal design is a hot research issue in the field of sensory communication.

[0004] Existing technical solutions include using time-division or frequency-division multiplexing to directly combine sensing signals and communication signals into a sensing signal, or using optimized OFDM signals as sensing signals to simultaneously perform sensing and communication functions.

[0005] For example, patent CN202211553853.9 proposes a time-frequency multiplexing operating mode for communication and sensing signal waveforms. The communication and sensing signals use the same frequency band during system operation, and within this band, the frequencies of the communication and sensing signals change over time according to a designed pattern, making full use of spectrum resources. This patent uses a time-frequency resource allocation method to achieve communication and sensing functions. The lack of resource sharing inevitably leads to additional time-frequency resource consumption, and the individual performance of communication and sensing will be significantly lower than that of a single-function system.

[0006] Patent CN201710170730.X proposes a design that embeds communication signals into each subcarrier of an OFDM radar signal, achieving integrated communication and radar signal design. It employs Gray coding combined with sequential cyclic shifting technology to simultaneously reduce the peak-to-average power ratio (PAPR) and main-sidelobe ratio of the integrated signal. Patent CN202111244523.7 proposes a radar-communication integration method based on OFDM signals, setting up an integrated OFDM (Orthogonal Frequency Division Multiplexing) comb spectrum signal for radar and communication. LFM radar sensing signals and communication signals are modulated onto subcarriers at different intervals, forming a unified sensing signal. Its sensing capability inherits the excellent performance of LFM while also carrying OFDM communication signals.

[0007] These two patents design OFDM signals to achieve a low peak-to-average power ratio (PAPR) similar to radar sensing signals, either as a whole or in part, for OFDM symbols and their subcarriers. However, the frequency domain information extraction from the echo signal at the receiver requires the correct solution of the OFDM signal. Therefore, the ranging delay depends on the cyclic prefix (CP) in the time domain signal, meaning the echo delay cannot exceed the CP's duration. Patent 3 uses an extremely long CP (25 μs) to ensure this characteristic, but this is uncommon in practical communication systems. The biggest problem with existing technologies is that standard CP cannot support long-range detection, while traditional methods use a two-symbol cycle, which consumes two symbols. Summary of the Invention

[0008] The purpose of this invention is to provide a method, system, and medium for generating, transmitting, and receiving a single-symbol synesthetic waveform, thereby overcoming resource waste and improving time efficiency.

[0009] To achieve the above objectives, the basic solution of this invention is: a method for generating and transmitting a single-symbol syn-sensing integrated waveform, comprising the following steps:

[0010] Different Flag detection windows are selected based on the sensing distance. A punch mapping method is used to map different frequency domain intervals according to the Flag, mapping the time-frequency sequence to the blank position of the frequency domain comb. The time domain single symbol periodic repetition is used to obtain different repetitive waveforms.

[0011] The working principle and beneficial effects of this basic scheme are as follows: This technical scheme utilizes the double-cycle repetition of a single symbol to achieve long-distance waveforms, with time-frequency mapping as frequency domain combing and time-domain single-symbol repetition. On the transmitting side, an additional puncturing mapping method is used to map the blank space of a slot to the combing blank space, overcoming the resource waste of combing. Furthermore, different repeating waveforms are selected based on the distance of the detection, choosing different flag detection windows to reduce ISI and improve efficiency.

[0012] Furthermore, the method for mapping the time-frequency sequence to the blank positions of the frequency domain comb is as follows:

[0013] Add blank mapping to the original process, and map different intervals kk according to Flag;

[0014] Let S[k] be a frequency domain sequence with N symbols, k = 0, 1, ..., N-1. The time domain representation of a discrete frequency domain sequence is as follows:

[0015]

[0016] Where e is the base of the natural logarithm, k is the subcarrier number, and N is the number of IFFT transform points;

[0017] Interpolating the frequency domain sequence S[k] at intervals of kk with 0s, we obtain a new frequency domain sequence S1[k], k = 0, 1, ..., 2N-1, which is characterized as:

[0018]

[0019] Where m is the subcarrier number, and S[m] is the value of the m-th subcarrier in S[k].

[0020] The new sequence is represented in the time domain as follows:

[0021]

[0022] have to

[0023]

[0024] g is a positive integer greater than 2.

[0025] By interpolating 0 into the frequency domain interval KK, a sensing signal with a time domain repeating period of two / three / four / ... / (g+2) cycles is obtained, enabling long-distance sensing.

[0026] By eliminating the need for punching and shortening, the sequence is mapped to the blank positions of the combing, thus overcoming the waste of combing resources.

[0027] The present invention also provides a method for receiving a single-symbol integrated sensing waveform, wherein communication time slots and sensing time slots are set at intervals, communication reception is performed in the communication time slots, and sensing reception is performed in the sensing time slots;

[0028] During communication reception, waveforms are merged and superimposed based on the Flag;

[0029] During sensing and reception, waveform truncation is performed based on the Flag.

[0030] This technical solution utilizes a single-symbol far-mid-near reception interception method to resist inter-symbol interference, achieving a time efficiency improvement of 100% compared to the traditional 2-symbol method.

[0031] Furthermore, the sensing and receiving method is as follows:

[0032] S41, Signal interception:

[0033] The sensing receiver opens a window to capture the echo signal half an OFDM symbol time after the timestamp of the sensing signal is emitted.

[0034] S42, Shutter Limit Processing:

[0035] The matching sequence is one of the two cycles of the transmitted sensing signal. After the time delay, the echo signal is regarded as the cyclic displacement of the matching sequence. The time delay is solved after obtaining the echo sequence.

[0036] S43, multi-cycle accumulation and backend processing:

[0037] After acquiring multiple cycles of sensing sequences, FFT is performed on the slow threshold dimension to obtain the speed information of the sensing target, and the sensing signal strength in the distance dimension is improved by pulse accumulation.

[0038] During sensing and reception, waveform truncation is performed based on the flag.

[0039] Furthermore, the specific steps of step S41 are as follows:

[0040] When Flag=0 and the number of complete symbol sampling points is N, the receiver opens a window at the next N / 2 points to collect the sensing signal echo.

[0041] When Flag=1 and the number of complete symbol sampling points is N, the receiver opens a window at the next N / 3 points to collect the sensing signal echo.

[0042] When Flag=2 and the number of complete symbol sampling points is N, the receiver opens a window at the following N / 4 points to collect the sensing signal echo;

[0043] When Flag = g and the number of complete symbol sampling points is N, the receiver opens a window at the following N / (g+2) points to collect the sensing signal echo.

[0044] Choose different flags based on distance (near, medium, or far) to save resources.

[0045] Furthermore, it also includes a step for recovering the maximum unambiguous distance:

[0046] If the problem of maximum ambiguity arises, the ambiguity can be resolved using the principle of coprime divisors. If the divisors are coprime, the simulated distance can be recovered using the Chinese Remainder Theorem.

[0047] x = a1 (mod m1)

[0048] x = a² (mod m²)

[0049] x = a i (modm i )

[0050] Where x represents the original unambiguous distance, m1, m2, ... m i It is the distance of a multi-period fuzzy system; if m1, m2, ... m i Coprime values, where the values ​​are ambiguous, can be uniquely recovered; mod stands for modulo operation.

[0051]

[0052] in, t i For inverse element, ti M i =1 (mod mi), which can be recursively solved using the Euclidean algorithm; M i a is an intermediate variable in the formula. i This represents the fuzzy distance corresponding to the i-th Flag.

[0053] Due to frequency domain puncturing, dual-period and triple-period radars reduce the maximum unambiguous range, potentially leading to ambiguity at the maximum detection range. However, because dual-period and triple-period radars are coprime, the coprime nature of the corresponding periods in the Flag pattern can be utilized to restore performance against ambiguity.

[0054] Furthermore, the method for receiving communication is as follows:

[0055] S61, Signal Acquisition:

[0056] When the target user receiver receives the OFDM signal, it performs synchronization, confirms the start and end positions of the sensing pilot symbols, and removes the time domain signal CP.

[0057] S62, Pilot Acquisition:

[0058] Based on the value of Flag, the corresponding frequency domain pilot sequence is obtained;

[0059] S63, Channel Estimation and Subsequent Processing:

[0060] The obtained frequency domain pilot sequence is mapped onto the interpolated subcarriers to obtain pilots with higher signal-to-noise ratios. The communication link relies on these pilots to obtain more accurate channel estimation for the downlink channel.

[0061] During communication reception, waveforms are merged and superimposed based on the Flag, making the operation simple.

[0062] Furthermore, the specific steps of step S62 are as follows:

[0063] When Flag=0:

[0064] The time-domain signals of the two repetition cycles of the sensing pilot symbol are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. The subcarrier point length FFT (N / 2 points) is then applied to it to obtain its frequency-domain pilot sequence.

[0065] When Flag=1:

[0066] The time-domain signals of the three repetition cycles of the sensing pilot symbol are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. The subcarrier point length FFT (N / 3 points) is then applied to obtain its frequency-domain pilot sequence.

[0067] When Flag=2:

[0068] The time-domain signals of the four repetition cycles of the sensing pilot symbol are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. The subcarrier point length FFT (N / 4 points) is then applied to obtain its frequency-domain pilot sequence.

[0069] When Flag = g,

[0070] The time-domain signals of the (g+2) repetition cycles of the sensing pilot symbols are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. Then, the FFT (N / (g+2) points) of the subcarrier point length is performed on it to obtain its frequency-domain pilot sequence.

[0071] Based on the value of Flag, the corresponding frequency domain pilot sequence is obtained, which facilitates processing.

[0072] The present invention also provides a system for generating and transmitting a single-symbol synesthetic waveform, including a self-transmitting and self-receiving sensing system, wherein the sensing system executes the generation and transmission method described in the present invention to generate and transmit a single-symbol synesthetic waveform.

[0073] This system employs a single-symbol far-to-medium-to-near transmission mapping method to combat inter-symbol interference.

[0074] The present invention also provides a receiving system for a single-symbol synesthetic waveform, including a self-transmitting and self-receiving sensing system, wherein the sensing system executes the receiving method described in the present invention to receive the single-symbol synesthetic waveform.

[0075] By adding a Flag bit, different waveforms are generated and intercepted based on the Flag signal, improving work efficiency.

[0076] The present invention also provides a computer-readable storage medium storing a program for executing the generation and transmission method of the present invention, and / or storing a program for executing the receiving method of the present invention.

[0077] The corresponding methods are stored in a medium for easy installation and use on different devices. Attached Figure Description

[0078] Figure 1 This is a flowchart illustrating the method for generating and transmitting a single-symbol synesthetic waveform according to the present invention.

[0079] Figure 2 This is a flowchart illustrating the mapping method of the single-symbol syn-sensory integrated waveform generation and transmission method of the present invention;

[0080] Figure 3 This is a waveform diagram of a time-domain dual-cycle sensing signal generated by interpolating 0 in the frequency domain of the pilot sequence with Flag=0 in the single-symbol integrated sensing waveform generation and transmission method of the present invention.

[0081] Figure 4This is a flowchart illustrating the receiving method of the single-symbol integrated sensing waveform of the present invention;

[0082] Figure 5 This is a schematic diagram of the sensing and receiving process of the single-symbol integrated sensing waveform receiving method of the present invention;

[0083] Figure 6 This is a schematic diagram of the sensing signal echo of different Flags during the sensing reception of the single-symbol integrated sensing waveform receiving method of the present invention.

[0084] Figure 7 This is a schematic diagram of the communication reception process of the single-symbol integrated sensing waveform receiving method of the present invention. Detailed Implementation

[0085] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0086] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0087] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0088] This invention discloses a method for generating and transmitting a single-symbol integrated sensing waveform, addressing the two-symbol problem in long-distance scenarios by compressing two symbols into one symbol for long-distance transmission. For example... Figure 1 As shown, the method for generating and transmitting a single-symbol synesthetic waveform includes the following steps:

[0089] The process involves generating bit information, performing code block segmentation and CRC processing to obtain LDPC / polar codes, and then performing puncturing, rate matching, code block concatenation, scrambling / modulation / layer mapping / PRB mapping, etc.

[0090] Based on the sensing distance (pre-set period, e.g., near-near, medium-far, near-near, medium-far), different flags are selected for the detection window (the larger the flag, the farther the distance). Figure 2 As shown, a punched mapping method is used to map different frequency domain intervals according to the Flag, mapping the time-frequency sequence to the blank positions of the frequency domain comb. The time domain repeats periodically with a single symbol, resulting in different repeating waveforms (e.g., double-period, communication uses double waveforms + superposition; sensing uses only a single waveform; 3-period, communication uses 3 waveforms + superposition; sensing uses only a single waveform). The Flag is a flag bit for air interface transmission, added to the PUCCH control channel, configured by the transmitter, and embedded in the frame format. After the receiver decrypts it, different operations are performed on the receiver.

[0091] Compared to traditional long-distance waveforms with two symbols and short-distance waveforms with one symbol, this invention uses double-cycle repetition of a single symbol to achieve long-distance waveforms, with time-frequency mapping as frequency domain combing and time-domain single-symbol repetition. To overcome the resource waste of combing, the transmitting side adopts an additional puncturing mapping method, mapping the blank space of a slot to the blank space of the combing, that is, mapping the original puncturing position to the blank space of the new waveform.

[0092] In a preferred embodiment of the present invention, the method for mapping the time-frequency sequence to the blank positions of the frequency domain comb is as follows:

[0093] Add blank mappings to the original process, and map different intervals kk according to Flag. The mapping table is as follows:

[0094] Table 1. Mapping Table

[0095] Flag=1 Kk = 2 Flag=2 Kk = 3

[0096] Let S[k] be a frequency domain sequence with N symbols, k = 0, 1, ..., N-1. The time domain representation of a discrete frequency domain sequence is as follows:

[0097]

[0098] Where e is the base of the natural logarithm, k is the subcarrier number, and N is the number of IFFT transform points;

[0099] Interpolating the frequency domain sequence S[k] at intervals of kk with 0s, we obtain a new frequency domain sequence S1[k], k = 0, 1, ..., 2N-1, which is characterized as:

[0100]

[0101] Where m is the subcarrier number, and S[m] is the value of the m-th subcarrier in S[k].

[0102] The new sequence is represented in the time domain as follows:

[0103]

[0104] have to

[0105]

[0106] g is a positive integer greater than 2.

[0107] like Figure 3 As shown, a sensing signal with a time-domain repeating cycle of two / three / four / ... / (g+2) is obtained by interpolating 0 through the frequency domain interval KK, which can realize long-distance sensing.

[0108] Normal punch mapping selects to discard or repeat some bits and then sequentially maps them to the corresponding time-frequency resources based on the relationship between the input bitstream length N of the rate matching and the actual number of bits transmitted in the channel E. This invention eliminates the original punching and shortening, and maps the sequence to the blank positions of the combing, thus overcoming the waste of combing resources.

[0109] This invention also provides a method for receiving a single-symbol integrated sensing waveform, such as... Figure 4 As shown, communication time slots and sensing time slots are set at intervals. Communication reception is performed in the communication time slots, and sensing reception is performed in the sensing time slots.

[0110] During communication reception, waveforms are merged and superimposed based on the Flag;

[0111] During sensing and reception, waveform truncation is performed based on the Flag.

[0112] This technical solution utilizes a single-symbol near-to-far reception interception method to combat inter-symbol interference, achieving a 100% improvement in time efficiency compared to the traditional two-symbol method. Different repeating waveforms are selected based on the distance of the detection (Flag) to reduce ISI. The RX is an integrated sensing device; during communication, waveforms are merged and superimposed based on the Flag; during sensing, waveforms are truncated based on the Flag.

[0113] In a preferred embodiment of the present invention, such as Figure 5 As shown, the sensing and receiving method is as follows:

[0114] S41, Signal interception:

[0115] The sensing receiver opens a window to capture the echo signal half an OFDM symbol time after the timestamp of the sensing signal is emitted.

[0116] S42, Shutter Limit Processing:

[0117] The matching sequence is one of the two cycles of the transmitted sensing signal. After the time delay, the echo signal is regarded as the cyclic displacement of the matching sequence. The time delay is solved after obtaining the echo sequence.

[0118] S43, multi-cycle accumulation and backend processing:

[0119] After acquiring multiple cycles of sensing sequences, FFT is performed on the slow threshold dimension to obtain the speed information of the sensing target. The intensity of the sensing signal in the distance dimension is improved by pulse accumulation. Subsequently, CFAR thresholding and Kalman filtering can be performed on the echo signal for tracking processing.

[0120] Compared to truncation with Flag=0, this results in a decrease in the matching peak energy and an increase in the main and side lobes. Introducing Flag=1 can yield a 1dB gain.

[0121] In a preferred embodiment of the present invention, such as Figure 6 As shown, the specific steps of step S41 are as follows:

[0122] When Flag=0 and the number of complete symbol sampling points is N, the receiver opens a window at the next N / 2 points to collect the sensing signal echo.

[0123] When Flag=1 and the number of complete symbol sampling points is N, the receiver opens a window at the next N / 3 points to collect the sensing signal echo.

[0124] When Flag=2 and the number of complete symbol sampling points is N, the receiver opens a window at the following N / 4 points to collect the sensing signal echo;

[0125] When Flag = g and the number of complete symbol sampling points is N, the receiver opens a window at the following N / (g+2) points to collect the sensing signal echo.

[0126] In a preferred embodiment of the present invention, the dual-period and triple-period radars, due to frequency domain punching operations, reduce the maximum unambiguous range of the radar, potentially leading to ambiguity at the maximum radar detection range. Since the dual-period and triple-period radars are coprime, the coprime nature of the corresponding periods in the Flag pattern can be utilized to restore performance against ambiguity.

[0127] If the problem of maximum ambiguity arises, the ambiguity can be resolved using coprime relationships:

[0128] Table 2. Maximum unambiguous distance of sensed signals repeated at different periods

[0129] 2 cycles Maximum unambiguous distance: 625m 3 cycles Maximum unambiguous distance: 416m

[0130] If the divisors are coprime, the simulated distance can be recovered using the Chinese Remainder Theorem:

[0131] x = a1 (mod m1)

[0132] x = a² (mod m²)

[0133] x = a i (modm i )

[0134] Where x represents the original unambiguous distance, m1, m2, ... m i It is the distance of a multi-period fuzzy system; if m1, m2, ... m i Coprime values, where the values ​​are ambiguous, can be uniquely recovered; mod stands for modulo operation.

[0135]

[0136] in, t i For inverse element, t i M i =1 (mod mi), which can be recursively solved using the Euclidean algorithm; M i a is an intermediate variable in the formula. i This represents the fuzzy distance corresponding to the i-th Flag.

[0137] In a preferred embodiment of the present invention, such as Figure 7 As shown, the method for receiving communication data is as follows:

[0138] S61, Signal Acquisition:

[0139] When the target user receiver receives the OFDM signal, it performs synchronization, confirms the start and end positions of the sensing pilot symbols, and removes the time domain signal CP.

[0140] S62, Pilot Acquisition:

[0141] Based on the value of Flag, the corresponding frequency domain pilot sequence is obtained;

[0142] S63, Channel Estimation and Subsequent Processing:

[0143] The obtained frequency domain pilot sequence is mapped onto the interpolated subcarriers to obtain pilots with higher signal-to-noise ratios. The communication link relies on these pilots to obtain more accurate channel estimation for the downlink channel.

[0144] In a preferred embodiment of the present invention, step S62 specifically comprises the following steps:

[0145] When Flag=0:

[0146] The time-domain signals of the two repetition cycles of the sensing pilot symbol are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. The subcarrier point length FFT (N / 2 points) is then applied to it to obtain its frequency-domain pilot sequence.

[0147] When Flag=1:

[0148] The time-domain signals of the three repetition cycles of the sensing pilot symbol are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. The subcarrier point length FFT (N / 3 points) is then applied to obtain its frequency-domain pilot sequence.

[0149] When Flag=2:

[0150] The time-domain signals of the four repetition cycles of the sensing pilot symbol are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. The subcarrier point length FFT (N / 4 points) is then applied to obtain its frequency-domain pilot sequence.

[0151] When Flag = g,

[0152] The time-domain signals of the (g+2) repetition cycles of the sensing pilot symbols are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. Then, the FFT (N / (g+2) points) of the subcarrier point length is performed on it to obtain its frequency-domain pilot sequence.

[0153] Based on the value of Flag, the corresponding frequency domain pilot sequence is obtained, which facilitates processing.

[0154] The present invention also provides a system for generating and transmitting a single-symbol synesthetic waveform, including a self-transmitting and self-receiving sensing system, wherein the sensing system executes the generation and transmission method described in the present invention to generate and transmit a single-symbol synesthetic waveform.

[0155] This system integrates communication and sensing, and the generated transmitted signals are consistent with those of communication and sensing. The received signals are truncated or superimposed according to the different communication and sensing conditions. A single-symbol far-to-medium-to-near transmission mapping method is used to resist inter-symbol interference.

[0156] The present invention also provides a receiving system for a single-symbol synesthetic waveform, including a self-transmitting and self-receiving sensing system, wherein the sensing system executes the receiving method described in the present invention to receive the single-symbol synesthetic waveform.

[0157] By adding a Flag bit, different waveforms are generated and intercepted based on the Flag signal, improving work efficiency.

[0158] The carrier frequency of the OFDM sensing reference signal is 2.6 GHz, configured as DDDSU, with 14 OFDM symbols per time slot (horizontal time domain unit on the horizontal axis). The 100 MHz bandwidth has 273 RBs, and each RB has 12 REs, where REs are subcarriers in the frequency domain.

[0159] The present invention also provides a computer-readable storage medium storing a program for executing the generation and transmission method described in the present invention, and / or storing a program for executing the receiving method described in the present invention. Storing the corresponding methods in the medium facilitates installation and use on different devices.

[0160] This invention proposes a single-symbol far-mid-near transmission mapping and reception interception method to combat inter-symbol interference, achieving a 100% improvement in time efficiency compared to the traditional 2-symbol method. By adding a Flag bit, different waveforms are generated and received based on the Flag signal. Reception is truncated during sensing gaps in the integrated sensing device, while reception during communication gaps is merged, saving resources.

[0161] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0162] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for generating and transmitting a single-symbol synesthetic waveform, characterized in that, Includes the following steps: Different Flag detection windows are selected based on the sensing distance. A punch mapping method is used to map different frequency domain intervals according to the Flag, mapping the time-frequency sequence to the blank position of the frequency domain comb. The time domain single symbol periodic repetition is used to obtain different repetitive waveforms. The method for mapping time-frequency sequences to blank spaces in the frequency domain comb is as follows: Add blank mapping to the original process, and map different intervals kk according to Flag; Suppose that the frequency domain sequence of N is symbolically... The time-domain representation of a discrete frequency domain sequence is as follows: ， in, It is the base of the natural logarithm. Where N is the subcarrier number and N is the number of IFFT transform points; For frequency domain sequences By interpolating zeros at intervals kk, a new frequency domain sequence is obtained. It is characterized as follows: ， in, It is the subcarrier sequence number. It is the value of the m-th subcarrier of S[k]; The new sequence is represented in the time domain as follows: ， have to flag=0, flag=1, flag=2, Flag = g, where g is a positive integer greater than 2; By interpolating 0 into the frequency domain interval KK, a sensing signal with a time domain periodic repetition of two / three / four / ... / (g+2) is obtained, enabling long-distance sensing.

2. A method for receiving a single-symbol integrated sensing waveform, characterized in that, Set the interval between communication time slots and sensing time slots, and perform communication reception in the communication time slots and sensing reception in the sensing time slots; During communication reception, waveforms are merged and superimposed based on the Flag; During sensing and reception, waveform truncation is performed based on the Flag; The sensing and receiving method is as follows: S41, Signal interception: The sensing receiver opens a window to capture the echo signal half an OFDM symbol time after the timestamp of the sensing signal is emitted. S42, Shutter Limit Processing: The matching sequence is one of the two cycles of the transmitted sensing signal. After the time delay, the echo signal is regarded as the cyclic displacement of the matching sequence. The time delay is solved after obtaining the echo sequence. S43, multi-cycle accumulation and backend processing: After acquiring multiple cycles of sensing sequences, FFT is performed on the slow threshold dimension to obtain the speed information of the sensing target, and the sensing signal strength in the distance dimension is improved by pulse accumulation. The specific steps of step S41 are as follows: When Flag=0 and the number of complete symbol sampling points is N, the receiver opens a window at the next N / 2 points to collect the sensing signal echo. When Flag=1 and the number of complete symbol sampling points is N, the receiver opens a window at the next N / 3 points to collect the sensing signal echo. When Flag=2 and the number of complete symbol sampling points is N, the receiver opens a window at the following N / 4 points to collect the sensing signal echo; When Flag=g, and the number of complete symbol sampling points is N, the receiver opens a window at the following N / (g+2) points to collect the sensing signal echo, where g is a positive integer greater than 2.

3. The method for receiving a single-symbol synesthetic waveform as described in claim 2, characterized in that, It also includes a step for recovering the maximum unambiguous distance: If the problem of maximum ambiguity arises, the ambiguity can be resolved using the principle of coprime divisors. If the divisors are coprime, the simulated distance can be recovered using the Chinese Remainder Theorem. ， ， ， Where x represents the original unambiguous distance, , It is a distance with multi-period ambiguity; if , Coprime values, where the values ​​are ambiguous, can be uniquely recovered; mod stands for modulo operation. ， in, For the reverse element, The Euclidean algorithm can be used recursively; , This represents the fuzzy distance corresponding to the i-th Flag.

4. The method for receiving a single-symbol synesthetic waveform as described in claim 3, characterized in that, The method for receiving communication data is as follows: S61, Signal Acquisition: When the target user receiver receives the OFDM signal, it performs synchronization, confirms the start and end positions of the sensing pilot symbols, and removes the time domain signal CP. S62, Pilot Acquisition: Based on the value of Flag, the corresponding frequency domain pilot sequence is obtained; S63, Channel Estimation and Subsequent Processing: The obtained frequency domain pilot sequence is mapped onto the interpolated subcarriers to obtain pilots with higher signal-to-noise ratios. The communication link relies on these pilots to obtain more accurate channel estimation for the downlink channel.

5. The method for receiving a single-symbol integrated sensing waveform as described in claim 4, characterized in that, The specific steps of step S62 are as follows: When Flag = 0: The time-domain signals of the two repetition cycles of the sensed pilot symbol are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. Then, an FFT (N / 2 points) is performed on it to obtain its frequency-domain pilot sequence. When Flag = 1: The time-domain signals of the three repetition cycles of the sensed pilot symbol are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. Then, an FFT (N / 3 points) is performed on it to obtain its frequency-domain pilot sequence. When Flag = 2: The time-domain signals of the four repetition cycles of the sensed pilot symbol are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. Then, an FFT (N / 4 points) is performed on it to obtain its frequency-domain pilot sequence. When Flag=g The time-domain signals of the (g+2) repetition cycles of the sensing pilot symbols are superimposed to obtain a pilot time-domain sequence with a higher signal-to-noise ratio. Then, the FFT of the subcarrier point length (N / (g+2) points) is performed on it to obtain its frequency-domain pilot sequence.

6. A system for generating and transmitting a single-symbol synesthetic waveform, characterized in that, The system includes a self-transmitting and self-receiving sensing system, which executes the method described in claim 1 to generate and transmit a single-symbol integrated sensing waveform.

7. A single-symbol integrated waveform receiving system, characterized in that, The system includes a self-transmitting and self-receiving sensing system, which performs the method described in any one of claims 2-5 to receive a single-symbol integrated sensing waveform.

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