Rapid signal capturing method and device for satellite communication, electronic equipment and storage medium

Abstract

The invention provides a satellite communication signal rapid capturing method and device, electronic equipment and a storage medium, and belongs to the technical field of communication. The method comprises the following steps: sampling a received signal at a first sampling rate and a second sampling rate respectively to obtain a first sampling signal and a second sampling signal; on this basis, correlation calculation is performed on the first sampling signal to determine the target sub-sampling signal, and the sampling frequency of the first sampling signal is equal to that of the first sampling signal in a preset proportion, so that the number of sampling points is reduced, and the calculation amount is reduced during correlation calculation; by performing segmentation parallel processing on the first sampling signal, the complexity of capturing the target signal in the time-frequency domain is reduced, and the capturing time is shortened; and finally, according to the target sub-sampling signal, determining a superposed enhanced signal in the second sampling signal, and analyzing the enhanced signal to obtain a target signal, so that the target signal can be accurately obtained in a low signal-to-noise ratio environment on the basis of reducing the calculation amount.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a method, device, electronic equipment and storage medium for rapid signal acquisition in satellite communication. Background Art

[0002] In mobile communications, a cell refers to the range that a base station signal can cover and is the basic unit of a wireless network. When a terminal device in a cell is turned on or switches cells, it needs to perform a cell search to ensure that the terminal device obtains time synchronization and frequency synchronization of the system. During the cell search process of the terminal, whether the primary synchronization signal (PSS) can be quickly captured determines the performance of the cell search and the initial best beam selection.

[0003] The related technology performs two-dimensional traversal search in the time domain and frequency domain. This method is not only time-consuming and computationally intensive, and wastes a large amount of computing resources, but also has a large Doppler frequency offset, making it difficult to correctly detect the signal. Summary of the invention

[0004] The present disclosure provides a method, device, electronic equipment and storage medium for rapid signal acquisition of satellite communication.

[0005] The first aspect of the present disclosure provides a method for quickly capturing a satellite communication signal, including: The received signal is sampled at a first sampling rate to obtain a first sampled signal; and the received signal is sampled at a second sampling rate to obtain a second sampled signal; wherein the first sampling rate is obtained by multiplying a preset ratio by the second sampling rate; After dividing the first sampling signal into at least two segments of first sub-sampling signals, for any first sub-sampling signal, extracting the amplitude-frequency response of the first sub-sampling signal; Determining a target sub-sampling signal based on a relationship between an amplitude-frequency response of each first sub-sampling signal and a preset threshold; According to the positioning of the target sub-sampling signal, a preset number of signals at corresponding positions in the second sampling signal are superimposed to obtain an enhanced signal; and the enhanced signal is positioned to obtain a target signal.

[0006] In an embodiment of the present disclosure, extracting the amplitude-frequency response of the first sub-sampling signal includes: Calculate first related information between the first sub-sampled signal and a preset first local signal; The amplitude-frequency response of the first sub-sampled signal is extracted according to the first related information.

[0007] In the embodiment of the present disclosure, determining the target sub-sampling signal based on the relationship between the amplitude-frequency response of each first sub-sampling signal and a preset threshold value includes: If there is a signal whose amplitude-frequency response is greater than a preset threshold value among the first sub-sampled signals, determining the signal whose amplitude-frequency response is greater than the preset threshold value as a target sub-sampled signal; If there is no signal with an amplitude-frequency response greater than a preset threshold value in each first sub-sampled signal, recalculating the amplitude-frequency response of the first sub-sampled signal for any sampling point of the preset first local signal; If the amplitude-frequency response of the sampling point is greater than the preset threshold, the first sub-sampled signal is determined to be the target sub-signal; if the amplitude-frequency responses corresponding to all sampling points in the first sub-sampled signal are less than the preset threshold, the target sub-sampled signal does not exist in the first sub-sampled signal.

[0008] In an embodiment of the present disclosure, the method of locating the target sub-sampling signal and superimposing a preset number of signals at corresponding positions in the second sampling signal to obtain an enhanced signal includes: Determining a position of the target sub-sampling signal in the first sampling signal; A preset number of second sub-sampling signals corresponding to the positions are screened from the second sampling signals, and the second sub-sampling signals are superimposed to obtain an enhanced signal.

[0009] In the embodiment of the present disclosure, the step of locating and superimposing a preset number of signals at corresponding positions in the second sampling signal according to the target sub-sampling signal includes: Performing a coarse timing estimation on the position of the first sampling signal to obtain a first starting sampling point position of the target sub-sampling signal in the first sampling signal; A second starting sampling point position corresponding to the first starting sampling point position is determined in the second sampling signal, and a preset number of signals corresponding to the second starting sampling point position are used as the second sub-sampling signal.

[0010] In the embodiment of the present disclosure, the positioning of the enhanced signal to obtain the target signal includes: Calculate the amplitude-frequency response of the signal at each sampling point in the initial enhanced signal and the preset second local signal; The position corresponding to the sampling point with the maximum amplitude-frequency response of the preset second local signal is used as the starting position of the target signal, The target signal is acquired according to a starting position of the target signal.

[0011] In the embodiment of the present disclosure, the initial enhanced signal is the signal of each sampling point in the first half of the enhanced signal.

[0012] An embodiment of a second aspect of the present disclosure provides a device for quickly acquiring a signal in satellite communication, the device comprising: A sampling module, configured to sample a received signal at a first sampling rate to obtain a first sampled signal; and sample the received signal at a second sampling rate to obtain a second sampled signal; wherein the first sampling rate is obtained by multiplying a preset ratio by the second sampling rate; an extraction module, configured to extract an amplitude-frequency response of the first sub-sampling signal for any first sub-sampling signal after dividing the first sampling signal into at least two segments of first sub-sampling signals; A target sub-sampling signal determination module, configured to determine a target sub-sampling signal based on a relationship between an amplitude-frequency response of each first sub-sampling signal and a preset threshold; The target signal determination module is used to superimpose a preset number of signals at corresponding positions in the second sampling signal according to the target sub-sampling signal positioning to obtain an enhanced signal; and to position the enhanced signal to obtain a target signal.

[0013] An embodiment of the third aspect of the present disclosure provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in the first aspect or any optional implementation manner of the first aspect.

[0014] An embodiment of the fourth aspect of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, wherein the program is executed by a processor to implement the method described in the first aspect and any optional implementation manner of the first aspect.

[0015] The technical solution provided in the embodiments of the present disclosure has at least the following technical effects or advantages: The received signal is sampled at a first sampling rate to obtain a first sampling signal; and the received signal is sampled at a second sampling rate to obtain a second sampling signal; wherein the first sampling rate is obtained by multiplying a preset ratio by the second sampling rate; after dividing the first sampling signal into at least two segments of first sub-sampling signals, for any first sub-sampling signal, the amplitude-frequency response of the first sub-sampling signal is extracted; based on the relationship between the amplitude-frequency response of each first sub-sampling signal and a preset threshold, a target sub-sampling signal is determined; according to the positioning of the target sub-sampling signal, a preset number of signals at corresponding positions in the second sampling signal are superimposed to obtain an enhanced signal; and the enhanced signal is positioned to obtain a target signal.

[0016] Through the above implementation, the received signal is sampled at a first sampling rate and a second sampling rate respectively to obtain a first sampling signal and a second sampling signal; on this basis, a correlation calculation is performed on the first sampling signal to determine a target sub-sampling signal. Since the sampling frequency of the first sampling signal is a preset ratio of the first sampling signal, the number of sampling points is reduced, thereby reducing the amount of calculation when calculating the correlation; by performing segmented parallel processing on the first sampling signal and performing FFT on the output result, the complexity of capturing the target signal in the time-frequency domain is reduced, and the capture time is shortened; finally, according to the target sub-sampling signal, the superimposed enhanced signal is determined in the second sampling signal, and the enhanced signal is analyzed to obtain the target signal. On the basis of reducing the amount of calculation, the target signal can be accurately acquired in a low signal-to-noise ratio environment.

[0017] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will become apparent from the following description or be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present disclosure. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic diagram showing a method for quickly acquiring a satellite communication signal provided by an embodiment of the present disclosure is shown; Figure 2 A schematic diagram of a scenario in which a method for quickly acquiring a signal in satellite communication provided by an embodiment of the present disclosure is applicable is shown; Figure 3 A schematic diagram of collecting signals in a method for quickly capturing signals in satellite communication provided by an embodiment of the present disclosure is shown; Figure 4 A schematic diagram of capturing a signal in a method for quickly capturing a signal in satellite communication provided by an embodiment of the present disclosure is shown; Figure 5 A schematic diagram of a satellite communication signal rapid acquisition device provided by an embodiment of the present disclosure is shown; Figure 6 A schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure is shown; Figure 7 A schematic diagram of a storage medium provided by an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0019] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0020] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present disclosure should have the common meanings understood by those skilled in the art to which the present disclosure belongs.

[0021] The present disclosure provides a method for quickly capturing satellite communication signals. Figure 1 A method for quickly acquiring a satellite communication signal provided by an embodiment of the present disclosure is shown, which is executed by a terminal device receiving a signal and includes the following steps: In step S11 , the received signal is sampled at a first sampling rate to obtain a first sampled signal; and the received signal is sampled at a second sampling rate to obtain a second sampled signal.

[0022] The first sampling rate is obtained by multiplying the preset ratio by the second sampling rate.

[0023] For example, in the embodiment of the present disclosure, the transmitter of the synchronization signal and physical broadcast channel block (SynchronizationSignal and PBCH block, SSB) is set to a satellite. The satellite broadcasts SSB to the serving cell at a certain period, and each satellite beam contains an SSB, such as Figure 2 As shown, Lmax is the maximum number of SSBs in one cycle. In the embodiment of the present disclosure, the SSB cycle , the subcarrier spacing of SSB is 30KHz and the cell ID is 100.

[0024] The terminal device tunes its own receiving frequency, adjusts the azimuth and elevation of the receiving beam, scans each transmitting beam, down-converts and low-pass filters the signal received in the current beam, removes the carrier, and obtains the baseband signal. The terminal device adjusts the azimuth and elevation of the receiving beam, scans each transmitting beam, and assumes that the communication frequency band is n79, the SSB format is Case C, and the subcarrier spacing is 30KHz. , , the terminal tunes its receiving frequency to receive the signal in the current beam pair.

[0025] Set the second sampling rate to the normal sampling rate The first sampling rate is half of the second sampling rate. The baseband signal is sampled at half rate and normal rate in two ways at the same time. The sampling time lasts for 4 SSB cycles, i.e. 20ms, to obtain the first sampling signal and the second sampling signal in the time domain. and ,like Figure 3 As shown, and The number of sample points is 153600 and 307200 respectively.

[0026] Among them, one OFDM symbol includes 256 sampling points.

[0027] In step S12, after the first sampling signal is divided into at least two segments of first sub-sampling signals, the amplitude-frequency response of the first sub-sampling signal is extracted for any first sub-sampling signal.

[0028] For example, the half-sampled signal The average is Segment, that is , each signal includes The amplitude-frequency response of each signal segment is determined by the number of sample points. In the embodiment of the present disclosure, P can be greater than or equal to 2.

[0029] In some embodiments, extracting the amplitude-frequency response of the first sub-sampled signal in step S12 may also be achieved by: calculating first related information between the first sub-sampled signal and a preset first local signal; and extracting the amplitude-frequency response of the first sub-sampled signal according to the first related information.

[0030] Exemplarily, the preset first local signal is a primary synchronization signal (PSS) generated by the terminal device. The PSS signal can be generated by the following process: First, generate three m-sequences of length 127 according to the PSS sequence generation formula ,

[0031]

[0032]

[0033] in, , , .

[0034] Generate a resource block refGrid, which contains 240 subcarriers and 1 OFDM symbol. Put the three generated PSS sequences into the 127 subcarriers in the middle of refGrid, that is, the 57th to 183rd subcarriers, to obtain three frequency domain PSS signals, and then calculate three PSS time domain signals through IFFT. , , , the number of IFFT points is equal to .

[0035] In some embodiments of the present disclosure, each segment of the signal can be input into A correlation calculation is performed on the PMF to obtain the first correlation information between the PMF and the local PSS time domain signal. , .

[0036] in, .

[0037] Each PMF has three impulse responses, Indicates impulse response, corresponding to 3 , set it to the time domain inverse sequence of the local PSS signal, that is, .at this time, No shifting was performed.

[0038] The received PSS signal is expressed as , ,in, is the PSS time domain signal at the transmitter, , is the channel response, is the Doppler frequency deviation, , is the sampling period, is the channel noise. The output of each PMF is the correlation value between the input segmented signal and the shifted PSS time domain signal (local PSS signal), which contains Doppler frequency shift information. The segment signal contains PSS, , then The output of a PMF is:

[0039]

[0040]

[0041]

[0042]

[0043]

[0044]

[0045] The above calculation process obtains the first relevant information. Next, the amplitude-frequency response of the first sub-sampling signal is extracted.

[0046] For PMF output The correlation values ​​are subjected to N-point Fast Fourier Transform (FFT) operation. If , you need to fill with zeros before calculating the FFT.

[0047] In the disclosed embodiment, the PMF outputs 600 correlation values, which are padded with zeros to obtain a correlation sequence of length 1024, which is aligned to perform an N-point FFT operation. , we can get the first The normalized amplitude-frequency response of the point is:

[0048]

[0049]

[0050] in, .

[0051] In step S13, a target sub-sampling signal is determined based on the relationship between the amplitude-frequency response of each first sub-sampling signal and a preset threshold.

[0052] Exemplarily, the N correlation values ​​output by the FFT are peak detected, that is, the peak values ​​are selected. The maximum modulus value in the output is compared with the preset threshold. If the maximum value exceeds the threshold, it means that PSS is detected and the target sub-sampling signal can be determined. .

[0053] In some embodiments, the above step S13 can also be implemented in the following manner: if there is a signal with an amplitude-frequency response greater than a preset threshold in each first sub-sampled signal, the signal with an amplitude-frequency response greater than the preset threshold is determined to be a target sub-sampled signal; if there is no signal with an amplitude-frequency response greater than the preset threshold in each first sub-sampled signal, the amplitude-frequency response of the first sub-sampled signal is recalculated for any sampling point of the preset first local signal; if the amplitude-frequency response of the sampling point is greater than the preset threshold, the first sub-sampled signal is determined to be a target sub-signal; if the amplitude-frequency responses corresponding to all sampling points in the first sub-sampled signal are less than the preset threshold, the target sub-sampled signal does not exist in the first sub-sampled signal.

[0054] Exemplarily, if the maximum value does not exceed the threshold, the impulse response of the PMF is delayed by one sample point and the process proceeds to step S12 to recalculate the correlation result after adjusting the phase of the local PSS signal, thereby implementing a traversal search of the PSS in the time domain.

[0055] If the maximum value of the FFT output result does not exceed the threshold after traversing all phases, it means that there is no PSS in the sampled signal, or the receiving frequency is too different from the carrier frequency used by the satellite to transmit SSB. In this case, it is necessary to tune the frequency again and try to capture PSS at other frequencies. Rotate right Sample points are traversed, .

[0056] After 100 shifts, it was found Greater than the threshold, the corresponding local .

[0057] If after 128 shifts If the threshold is still not exceeded, re-tune the receiver frequency and try to search for PSS at other frequencies.

[0058] In step S14, a preset number of signals at corresponding positions in the second sampling signal are superimposed according to the target sub-sampling signal positioning; and the enhanced signal is positioned to obtain a target signal.

[0059] Exemplarily, after determining the target sub-sampling signal, the SSB in the second sampling signal is superimposed, and then the precise timing estimation is performed according to the enhanced signal obtained after the superposition to obtain the target signal.

[0060] In some embodiments, the enhanced signal obtained in the above step S14 can also be determined in the following manner: determine the position of the target sub-sampling signal in the first sampling signal; screen a preset number of second sub-sampling signals corresponding to the position in the second sampling signal, and superimpose the second sub-sampling signals to obtain the enhanced signal.

[0061] Exemplarily, before superposition, the position of the target sub-sampling signal needs to be determined. Specifically, the position can be determined by coarse timing estimation. The determined position is superimposed with the signal at the corresponding position of the second sampling signal to obtain the corresponding enhanced signal.

[0062] The step of selecting the second sub-sampling signal corresponding to the position of the first sampling signal from the second sampling signal includes: A coarse timing estimation is performed on the position of the first sampling signal to obtain the first starting sampling point position of the target sub-sampling signal in the first sampling signal; a second starting sampling point position corresponding to the first starting sampling point position is determined in the second sampling signal, and the signal corresponding to the second starting sampling point position is used as the second sub-sampling signal.

[0063] Exemplarily, frequency offset and coarse timing are estimated:

[0064] Coarse Timing Estimate , that is, PSS in half-sampled signal The first starting sampling point in samples.

[0065] PSS The second starting sampling point position in .

[0066] Will The coarse timing estimation result in the normal sampling signal is converted to In the PSS The starting sample point position in , and k SSBs are superimposed to obtain an enhanced SSB signal.

[0067] The superposition process refers to superposition SSB in the SSB is superimposed once for each sampling point, and the starting sample point of the superposition is The superposition length is ,in, , is the number of sample points of an OFDM symbol. is the starting sample point of the superposition, each delay samples, superimposed The enhanced SSB signal is obtained at each sample point.

[0068] The enhanced signal is positioned to obtain the target signal, including: Calculate the signal of each sampling point in the initial enhanced signal and the amplitude-frequency response of the preset second local signal respectively; take the position corresponding to the sampling point with the largest amplitude-frequency response as the starting position of the target signal, and obtain the target signal according to the starting position of the target signal.

[0069] For example, the first half of the enhanced SSB signal is taken as the superimposed PSS signal, and the PSS detection algorithm is used to calculate its difference from the local The second correlation information of the PSS time domain signal is used to find the maximum correlation peak index. , calculate the PSS in The exact starting sample point position , achieving accurate timing estimation.

[0070] At this time, the local PSS time domain signal is different from that in step S12, which is reflected in the number of IFFT points. , and there is only one, corresponding to the one determined in step S5 There are many options for PSS detection algorithms, such as sliding cross-correlation algorithm, differential correlation algorithm, segment-based cross-correlation algorithm, and frequency-offset-resistant PSS detection algorithm based on time domain inverse sequence.

[0071] Taking the traditional cross-correlation algorithm as an example, the process of precise timing estimation is briefly introduced: Different from the PSS time domain signal in step S12, the local PSS time domain signal here is express, for , , the superimposed PSS signal is , , respectively calculated by sliding cross-correlation and The relevant results of

[0072] PSS The exact starting sample point position ,in, for The index of the maximum correlation value in .

[0073] like Figure 4 As shown, it is a schematic diagram of the above-mentioned satellite communication signal rapid capture method. The first sampling signal is divided into a sequence of P segments of length L; each segment signal is analyzed by a partial matched filter using the local PSS signal to obtain the first related information; the amplitude-frequency response of each segment signal is obtained by FFT calculation according to the first related information, and the peak value of the amplitude-frequency response is detected to obtain the target sub-sampling signal. Subsequently, the target sub-sampling signal is superimposed and accurately located to obtain the target signal.

[0074] Through the signal rapid capture method of satellite communication of the embodiment of the present application, the received signal is sampled at a first sampling rate and a second sampling rate respectively to obtain a first sampling signal and a second sampling signal; on this basis, a correlation calculation is performed on the first sampling signal to determine a target sub-sampling signal. Since the sampling frequency of the first sampling signal is a preset ratio of the first sampling signal, the number of sampling points is reduced, and thus the amount of calculation is reduced when calculating the correlation; by performing segmented parallel processing on the first sampling signal and performing FFT on the output result, the complexity of capturing the target signal in the time-frequency domain is reduced, and the capture time is shortened; finally, based on the target sub-sampling signal, the superimposed enhanced signal is determined in the second sampling signal, and the enhanced signal is analyzed to obtain the target signal. On the basis of reducing the amount of calculation, the target signal can be accurately acquired in a low signal-to-noise ratio environment.

[0075] Corresponding to the implementation of the above satellite communication signal rapid acquisition method, the present disclosure also provides a satellite communication signal rapid acquisition device for executing the above Figure 1 The signal rapid acquisition method of satellite communication of any embodiment is shown as follows: Figure 5 As shown, the satellite communication signal rapid acquisition device comprises: The sampling module 501 is used to sample the received signal at a first sampling rate to obtain a first sampled signal; and to sample the received signal at a second sampling rate to obtain a second sampled signal; wherein the first sampling rate is obtained by multiplying a preset ratio by the second sampling rate; An extraction module 502 is configured to extract an amplitude-frequency response of the first sub-sampling signal for any first sub-sampling signal after dividing the first sampling signal into at least two segments of first sub-sampling signals; A target sub-sampling signal determination module 503 is used to determine a target sub-sampling signal based on a relationship between an amplitude-frequency response of each first sub-sampling signal and a preset threshold; The target signal determination module 504 is configured to superimpose a preset number of signals at corresponding positions in the second sampling signal according to the target sub-sampling signal positioning to obtain an enhanced signal; and to position the enhanced signal to obtain a target signal.

[0076] The satellite communication signal rapid acquisition device provided in the above-mentioned embodiment of the present disclosure and the satellite communication signal rapid acquisition method provided in the embodiment of the present disclosure are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0077] The present disclosure also provides an electronic device for executing the above-mentioned satellite communication signal rapid acquisition method. Figure 6, which shows a schematic diagram of an electronic device provided by some embodiments of the present disclosure. Figure 6 As shown, the electronic device includes: a processor 600, a memory 601, a bus 602 and a communication interface 603, wherein the processor 600, the communication interface 603 and the memory 601 are connected via the bus 602; the memory 601 stores a computer program that can be run on the processor 600, and the processor 600 executes the aforementioned Figure 1 Any of the illustrated embodiments provides a method for quickly acquiring a satellite communication signal.

[0078] The memory 601 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 603 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0079] The bus 602 may be an ISA bus, a PCI bus, or an EISA bus. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory 601 is used to store programs. After receiving the execution instruction, the processor 600 executes the program. Figure 1 Any of the illustrated embodiments discloses a method for quickly acquiring a satellite communication signal that can be applied to the processor 600 or implemented by the processor 600 .

[0080] The processor 600 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 600 or the instruction in the form of software. The above processor 600 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present disclosure can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present disclosure can be directly embodied as a hardware decoding processor to be executed, or a combination of hardware and software modules in the decoding processor can be executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 601, and the processor 600 reads the information in the memory 601 and completes the steps of the above method in combination with its hardware.

[0081] The electronic device provided by the embodiment of the present disclosure and the method for rapid signal acquisition of satellite communication provided by the embodiment of the present disclosure are based on the same inventive concept and have the same beneficial effects as the methods adopted, operated or implemented by them.

[0082] The present disclosure also provides a computer-readable storage medium corresponding to the satellite communication signal rapid acquisition method provided in the above embodiment. Figure 7 The computer-readable storage medium shown is a CD 30 on which a computer program (ie, a program product) is stored. When the computer program is executed by a processor, the method for rapid satellite communication signal acquisition provided in any of the aforementioned embodiments will be executed.

[0083] It should be noted that examples of the computer-readable storage medium may also include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical or magnetic storage media, which are not listed here one by one.

[0084] The computer-readable storage medium provided by the above-mentioned embodiments of the present disclosure and the method for rapid satellite communication signal acquisition provided by the embodiments of the present disclosure are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0085] It should be noted that: In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present disclosure can be practiced without these specific details. In some instances, well-known structures and technologies are not shown in detail so as not to obscure the understanding of this description.

[0086] Similarly, it should be understood that in order to streamline the present disclosure and help understand one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present disclosure, the various features of the present disclosure are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be interpreted as reflecting the following schematic diagram: the claimed disclosure requires more features than the features explicitly recorded in each embodiment. Inventive aspects are less than all the features of the single embodiment disclosed above. Therefore, the implementation method that follows the specific embodiment is explicitly incorporated into the specific embodiment, wherein each embodiment itself serves as a separate embodiment of the present disclosure.

[0087] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present disclosure and to form different embodiments.

[0088] The above description is only a preferred specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present disclosure should be covered by the protection scope of the present disclosure.

Claims

1. A method for quickly capturing signals in satellite communication, characterized in that: The method comprises: The received signal is sampled at a first sampling rate to obtain a first sampled signal; and the received signal is sampled at a second sampling rate to obtain a second sampled signal; wherein the first sampling rate is obtained by multiplying a preset ratio by the second sampling rate; After dividing the first sampling signal into at least two segments of first sub-sampling signals, for any first sub-sampling signal, extracting the amplitude-frequency response of the first sub-sampling signal; Determining a target sub-sampling signal based on a relationship between an amplitude-frequency response of each first sub-sampling signal and a preset threshold; According to the positioning of the target sub-sampling signal, a preset number of signals at corresponding positions in the second sampling signal are superimposed to obtain an enhanced signal; and the enhanced signal is positioned to obtain a target signal.

2. The method according to claim 1, characterized in that The extracting the amplitude-frequency response of the first sub-sampling signal comprises: Calculate first related information between the first sub-sampled signal and a preset first local signal; The amplitude-frequency response of the first sub-sampled signal is extracted according to the first related information.

3. The method according to claim 2, characterized in that The step of determining the target sub-sampling signal based on the relationship between the amplitude-frequency response of each first sub-sampling signal and a preset threshold value includes: If there is a signal whose amplitude-frequency response is greater than a preset threshold value among the first sub-sampled signals, determining the signal whose amplitude-frequency response is greater than the preset threshold value as a target sub-sampled signal; If there is no signal with an amplitude-frequency response greater than a preset threshold value in each first sub-sampled signal, recalculating the amplitude-frequency response of the first sub-sampled signal for any sampling point of the preset first local signal; If the amplitude-frequency response of the sampling point is greater than the preset threshold, the first sub-sampled signal is determined to be the target sub-signal; if the amplitude-frequency responses corresponding to all sampling points in the first sub-sampled signal are less than the preset threshold, the target sub-sampled signal does not exist in the first sub-sampled signal.

4. The method according to claim 1, characterized in that: The method of locating the target sub-sampling signal and superimposing a preset number of signals at corresponding positions in the second sampling signal to obtain an enhanced signal includes: Determining a position of the target sub-sampling signal in the first sampling signal; A preset number of second sub-sampling signals corresponding to the positions are screened from the second sampling signals, and the second sub-sampling signals are superimposed to obtain an enhanced signal.

5. The method according to claim 4, characterized in that The method of locating and superimposing a preset number of signals at corresponding positions in the second sampling signal according to the target sub-sampling signal includes: Performing a coarse timing estimation on the position of the first sampling signal to obtain a first starting sampling point position of the target sub-sampling signal in the first sampling signal; A second starting sampling point position corresponding to the first starting sampling point position is determined in the second sampling signal, and a preset number of signals corresponding to the second starting sampling point position are used as the second sub-sampling signal.

6. The method according to claim 1, characterized in that The step of positioning the enhanced signal to obtain a target signal includes: Calculate the amplitude-frequency response of the signal at each sampling point in the initial enhanced signal and the preset second local signal; The position corresponding to the sampling point with the maximum amplitude-frequency response of the preset second local signal is used as the starting position of the target signal, The target signal is acquired according to a starting position of the target signal.

7. The method according to claim 6, characterized in that The initial enhanced signal is the signal of each sampling point in the first half of the enhanced signal.

8. A signal rapid acquisition device for satellite communication, characterized in that: The device comprises: A sampling module, configured to sample a received signal at a first sampling rate to obtain a first sampled signal; and sample the received signal at a second sampling rate to obtain a second sampled signal; wherein the first sampling rate is obtained by multiplying a preset ratio by the second sampling rate; an extraction module, configured to extract an amplitude-frequency response of the first sub-sampling signal for any first sub-sampling signal after dividing the first sampling signal into at least two segments of first sub-sampling signals; A target sub-sampling signal determination module, configured to determine a target sub-sampling signal based on a relationship between an amplitude-frequency response of each first sub-sampling signal and a preset threshold; The target signal determination module is used to superimpose a preset number of signals at corresponding positions in the second sampling signal according to the target sub-sampling signal positioning to obtain an enhanced signal; and to position the enhanced signal to obtain a target signal.

9. An electronic device comprising a memory, a processor and a computer program stored in the memory, wherein the processor implements the method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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