Single-station passive positioning method and device for frequency hopping time division multiple access signal radiation source

Abstract

The invention discloses a single-station passive positioning method and device for a frequency hopping time division multiple access signal radiation source. According to the method, control and guard filtering of each frequency point is realized through a two-stage filtering mode of broadband filtering processing and narrowband frequency mixing filtering processing, a track is segmented according to target motion characteristics, the distance of a target radiation source is estimated by using the time difference of arrival of adjacent time slot signals, and a direction finding result is formed by combining a single-station beam, so that the direction finding accuracy of the target radiation source is improved. And an accurate positioning result of the target radiation source is obtained. According to the embodiment of the invention, broadband control, guard and interception can be realized, the positioning precision is higher, and the timeliness is higher.

Description

Technical Field

[0001] The present application belongs to the field of electronic communication technology, and in particular, relates to a single-station passive positioning method and device for a frequency-hopping time-division multiple access signal radiation source. Background Art

[0002] Frequency Hopping Spread Spectrum (FHSS) and Time Division Multiple Access (TDMA) signals are widely used in the field of electronic communications. However, the existing single-station passive positioning methods mainly process fixed-frequency signals and are not applicable to frequency-hopping TDMA signals with fast frequency hopping. In addition, the existing methods usually require multiple measurements from a moving base station, and the algorithm has poor timeliness and cannot achieve real-time positioning estimation of signals from a fixed single station. Summary of the invention

[0003] The embodiments of the present application provide a single-station passive positioning method and device for a frequency-hopping time-division multiple access signal radiation source, which is used to at least solve the problem that the single-station passive positioning method in the related art usually processes fixed-frequency signals and cannot be applied to frequency-hopping time-division multiple access signals.

[0004] In a first aspect, an embodiment of the present application provides a single-station passive positioning method for a frequency-hopping time-division multiple access signal radiation source, which is applied to a fixed single station, and the method includes:

[0005] According to a plurality of pre-divided frequency bands, receiving the radiation signal of the target radiation source in frequency bands, the radiation signal is a frequency hopping time division multiple access signal, and the plurality of frequency bands are divided according to the frequency hopping range of the radiation signal;

[0006] Broadband filtering and narrowband mixing filtering are performed in parallel on radiation signals corresponding to several frequency bands to obtain several narrowband filtered data;

[0007] Perform threshold detection on the narrowband filtered data to obtain the arrival time of each pulse, and sort them according to the order of arrival time to obtain several candidate time points after sorting;

[0008] The trajectory is segmented according to the target motion characteristics to obtain several uniform speed straight line segments;

[0009] For each uniform straight line segment, a radiation signal corresponding to each candidate time from a first moment corresponding to a first preset value before a preset moment to a second moment corresponding to a second preset value among the candidate time moments is determined as an observation value;

[0010] According to the arrival time difference between any two adjacent observation values, calculate the distance information between the target radiation source at the corresponding target time;

[0011] The position information of the target radiation source is calculated based on the distance information to the target radiation source at the target moment and the angle information of the target radiation source obtained by measuring the amplitude ratio of adjacent beams.

[0012] In a second aspect, an embodiment of the present application provides a single-station passive positioning device for a frequency-hopping time-division multiple access signal radiation source, which is applied to a fixed single station, and the device includes:

[0013] A receiving module, used for receiving the radiation signal of the target radiation source in frequency bands according to a plurality of pre-divided frequency bands, wherein the radiation signal is a frequency hopping time division multiple access signal, and the plurality of frequency bands are divided according to the frequency hopping range of the radiation signal;

[0014] A filtering module is used to perform broadband filtering and narrowband mixing filtering in parallel on radiation signals corresponding to several frequency bands to obtain several narrowband filtered data;

[0015] A sorting module is used to perform threshold detection on the narrowband filtered data to obtain the arrival time of each pulse, and sort the arrival times according to the order of arrival time to obtain a number of candidate time points after sorting;

[0016] A division module is used to divide the trajectory into segments according to the target motion characteristics to obtain a number of uniform speed straight line segments;

[0017] A determination module, for determining, for each uniform straight line segment, a radiation signal corresponding to each candidate moment from a first moment corresponding to a first preset value before a preset moment to a second moment corresponding to a second preset value among a plurality of candidate moments as an observation value;

[0018] A first calculation module is used to calculate the distance information between the target radiation source and the target radiation source at the corresponding target time according to the arrival time difference between any two adjacent observation values;

[0019] The second calculation module is used to calculate the position information of the target radiation source according to the distance information between the target radiation source and the target radiation source at the target time and the angle information of the target radiation source obtained by adjacent beam amplitude ratio measurement.

[0020] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, the steps of the single-station passive positioning method of the frequency-hopping time-division multiple access signal radiation source as described in any one of the embodiments of the first aspect are implemented.

[0021] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having computer program instructions stored thereon. When the computer program instructions are executed by a processor, the steps of the single-station passive positioning method for a frequency-hopping time-division multiple access signal radiation source as described in any one of the embodiments of the first aspect are implemented.

[0022] In a fifth aspect, an embodiment of the present application provides a computer program product, which is stored in a storage medium and executed by at least one processor to implement the steps of a single-station passive positioning method for a frequency-hopping time-division multiple access signal radiation source as provided in the first aspect of an embodiment of the present application.

[0023] The single-station passive positioning method and device of the frequency-hopping time-division multiple access signal radiation source of the embodiment of the present application realizes the control and guard filtering of each frequency point through a two-stage filtering method of broadband filtering processing and narrowband mixing filtering processing, and divides the trajectory into segments according to the target motion characteristics, and estimates the distance of the target radiation source by using the arrival time difference of adjacent time slot signals. Combined with the single-station beamforming direction-finding result, the accurate positioning result of the target radiation source is obtained, which can realize broadband control and guard detection, has higher positioning accuracy, and is more timely. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 It is a flow chart of a single-station passive positioning method for a frequency-hopping time-division multiple access signal radiation source provided in an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of the process of broadband filtering provided by an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of the flow of narrowband mixing and filtering processing provided by an embodiment of the present application;

[0028] Figure 4 is a schematic diagram of the target motion trajectory division principle provided in an embodiment of the present application;

[0029] Figure 5 It is a schematic diagram of the target distance speed estimation principle provided by an embodiment of the present application;

[0030] Figure 6 It is a structural schematic diagram of a single-station passive positioning device of a frequency-hopping time-division multiple access signal radiation source provided in an embodiment of the present application;

[0031] Figure 7It is a structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0032] Reference numerals:

[0033] A single-station passive positioning device 600 for a frequency-hopping time-division multiple access signal radiation source, a receiving module 601, a filtering module 602, a sorting module 603, a dividing module 604, a determining module 605, a first calculating module 606, a second calculating module 607,

[0034] Electronic device 700 , processor 701 , memory 702 , communication interface 703 , bus 710 . DETAILED DESCRIPTION

[0035] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0037] Passive positioning is used to refer to a positioning technology means that during the positioning process, the positioning system itself does not emit any signal, and only relies on receiving the target radiation or reflected signal to determine the target's position.

[0038] Frequency Hopping Spread Spectrum (FHSS) is used to represent an important communication technology in satellite communications. It belongs to the spread spectrum communication system. It uses a pseudo-random sequence to continuously change the carrier frequency to expand the signal bandwidth to achieve the purpose of spread spectrum.

[0039] Time Division Multiple Access (TDMA) is used to refer to a communication technology for sharing transmission resources. It enables multiple users to use the common transmission medium in a time-sharing manner by allocating time slots, thereby realizing the sharing of channel resources.

[0040] Frequency-hopping time-division multiple access signals are widely used in the field of electronic communications. However, existing single-station passive positioning methods mainly process fixed-frequency signals and are not applicable to frequency-hopping TDMA signals with fast frequency hopping. In addition, existing methods usually require multiple measurements from a moving base station, and the algorithm has poor timeliness and cannot achieve real-time positioning estimation of signals from a fixed single station.

[0041] At present, there are three main single-station passive positioning methods that have been made public. The first is a single-station passive positioning method based on a single baseline interferometer method, which uses an interferometer to measure the angle of the target and uses the phase change of the received signal to estimate the distance of the target; the second is a single-station direct positioning method based on a single motion array, which places the motion observation station at different observation positions at different times, and uses the target signal arrival angles measured at different positions to cross-estimate the target position parameters; the third is a direct positioning method based on subspace data fusion, which uses a single motion array to intercept the target radiation signal at different spatial positions to calculate the signal subspace and noise subspace, and then subspace-maps all possible target points in the effective area, and finally traverses the search for the target position.

[0042] It should be understood that the existing single-baseline interferometer single-station positioning method is affected by the observation angle. When the pitch angle between the reconnaissance station and the radiation source is large, the single-baseline model direction finding error is large and the positioning performance is seriously reduced. The single-station direct positioning method of a single motion array and the direct positioning method based on subspace data fusion require the reconnaissance station to be in different positions for measurement. Due to the limitations of geographical location and moving speed, the algorithm is not very timely. In addition, the existing single-station positioning algorithms are only applicable to fixed-frequency signals, and no research has been conducted on pseudo-random frequency hopping signals.

[0043] In order to solve the problems of the related art, the embodiments of the present application provide a single-station passive positioning method and device for a frequency-hopping time-division multiple access signal radiation source.

[0044] The single-station passive positioning method for the frequency-hopping time-division multiple access signal radiation source provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0045] Figure 1The flowchart of the single-station passive positioning method 100 for a frequency hopping time division multiple access signal radiation source according to an embodiment of the present application is shown. It should be noted that the single-station passive positioning method for a frequency hopping time division multiple access signal radiation source according to an embodiment of the present application can be applied to a single fixed station.

[0046] like Figure 1 As shown, the single-station passive positioning method 100 of the frequency-hopping time-division multiple access signal radiation source may specifically include the following steps:

[0047] S101, receiving a radiation signal from a target radiation source in frequency bands according to a plurality of pre-divided frequency bands, wherein the radiation signal is a frequency hopping time division multiple access signal, and the plurality of frequency bands are divided according to a frequency hopping range of the radiation signal;

[0048] S102, performing broadband filtering and narrowband mixing filtering in parallel on radiation signals corresponding to respective frequency bands to obtain data after narrowband filtering;

[0049] S103, performing threshold detection on the narrowband filtered data to obtain the arrival time of each pulse, and sorting the arrival times according to the order of arrival time to obtain a number of sorted candidate time points;

[0050] S104, dividing the trajectory into segments according to the target motion characteristics to obtain a number of uniform speed straight line segments;

[0051] S105, for each uniform speed straight line segment, determine the radiation signal corresponding to each candidate time from a first moment corresponding to a first preset value before the preset moment to a second moment corresponding to a second preset value among the candidate time points as an observation value;

[0052] S106, calculating the distance information between the target radiation source at the corresponding target time according to the arrival time difference between any two adjacent observation values;

[0053] S107, calculating the position information of the target radiation source according to the distance information from the target radiation source at the target time and the angle information of the target radiation source obtained by adjacent beam amplitude ratio measurement.

[0054] Therefore, the control and guard filtering of each frequency point is realized through the two-stage filtering method of broadband filtering and narrowband mixing filtering, and the trajectory is divided into segments according to the target motion characteristics. The arrival time difference of adjacent time slot signals is used to estimate the distance of the target radiation source. Combined with the single-station beamforming direction finding result, the accurate positioning result of the target radiation source is obtained, which can realize broadband control and guard detection, with higher positioning accuracy and higher timeliness. In addition, since the reconnaissance processing of frequency-hopping TDMA signals can be realized by a single station, the system hardware resources can be saved; there is no need to iteratively solve the target position, the amount of calculation is smaller and the complexity is lower.

[0055] The specific implementation methods of the above steps are introduced below.

[0056] In some embodiments, in S101, in order to achieve full probability reception of broadband frequency hopping TDMA signals, the frequency hopping range of the frequency hopping signal [f L ,f H ] is divided into K sub-bands, and the frequency width of each sub-band is B = (f H -f L ) / K. Furthermore, the radiated signal may be received by the antenna in frequency bands, so that the signals of each sub-band (ie, each frequency band) can be processed in parallel subsequently.

[0057] In some embodiments, the specific implementation method of S102 may include performing the following steps in parallel for the radiation signals corresponding to several frequency bands: performing RF direct sampling on the radiation signal to obtain a sampled signal; performing digital down-conversion and broadband filtering extraction on the sampled signal according to the frequency band to obtain a broadband filtered extracted signal; and performing mixing processing, extraction and low-pass filtering on the broadband filtered extracted signal according to the local oscillator signals corresponding to several frequency points to obtain several narrowband filtered data, wherein the center frequency of the local oscillator signal is the frequency of the corresponding frequency point controlled by the frequency point.

[0058] Specifically, Figure 2 Schematic diagram of the process flow of broadband filtering is shown. Figure 3 A schematic diagram of the process flow of narrowband mixing and filtering is shown.

[0059] like Figure 2 As shown, in the broadband filtering process, after the radiation signal of the target radiation source is received by the antenna in frequency bands, that is, after the corresponding radiation signals are received in each frequency band from band 1 to band K, the back end performs RF direct sampling on the signals in each frequency band, and performs digital down-conversion and broadband filtering extraction on the sampled signals according to sub-bands to reduce the data rate to a processable range.

[0060] like Figure 3 As shown in the figure, in the narrowband mixing and filtering process, the frequencies of the M frequency points of the known frequency hopping TDMA signal [f1, f2, ..., f M ] as the center frequency of the local oscillator signal, the signal extracted by broadband filtering is mixed; then, in order to further reduce the data rate, the mixed data is extracted and low-pass filtered. Taking frequency band K as an example, the signal extracted by broadband filtering is mixed with the local oscillator signals 1 to M corresponding to its M frequency points, and after extraction and low-pass filtering, M narrowband data can be output.

[0061] In this way, through the above two-stage filtering structure, guard filtering of each frequency point can be realized, so that the full-band data can be separated to obtain filtering results corresponding to several frequency-hopping frequencies, which are narrowband data.

[0062] Furthermore, in some embodiments, in S103, M narrowband filtered data are read and threshold detection is performed on them respectively to measure the arrival time of each pulse, and the measurement results are rearranged according to the order of arrival time. In this way, several sorted candidate time points T1<T2<T3<…<T k <….

[0063] refer to Figure 4 , is a schematic diagram of the principle of dividing the target motion trajectory in S104. Figure 4 As shown, according to the target motion characteristics, such as target speed and direction, its motion trajectory is divided into several uniform straight line segments, so that the subsequent steps are performed in each uniform straight line segment.

[0064] In some embodiments, in S105, for each uniform straight line segment, the radiation signal corresponding to each candidate moment from the first moment corresponding to the first preset value before the preset moment to the second moment corresponding to the second preset value among the candidate moments is determined as the observation value, where the preset moment may be the current moment. That is, after rearrangement, in each uniform straight line segment, the first preset value N and the second preset value M may be selected based on application experience, where N and M are positive integers. Thus, the target point is located at N positions T before the k moment. k-1 , T k-2 ,…,T k-N and the following M positions T k+1 , T k+2 ,…,T k+N The transmitted radiation source signal is the observed value.

[0065] Next, the arrival time difference Tr between any two adjacent observations can be calculated according to the following formula (1): ki , that is, the reconnaissance station receives T k+i With T k The arrival time difference at:

[0066] T ki =t k+i -t k ; (1)

[0067] Among them, t k+i Indicates that the radiation signal is at T k+i The signal arrival time at k Indicates that the radiation signal is at T kThe signal arrival time at , i∈[-N,M] and i is a positive integer, N is a first preset value, M is a second preset value, that is, i=-N,-N+1,…,-2,-1,1,2,…,M-1,M.

[0068] As an optional embodiment, S106 can be implemented through the following steps: calculating the corresponding transmission time interval based on the time slot characteristics of the radiation signal and the arrival time difference; constructing a matrix corresponding to all observation values ​​based on the transmission time interval; and when the matrix is ​​full rank, calculating the distance information between the target radiation source and the radiation speed information of the target radiation source at the corresponding target time.

[0069] In specific implementation, the corresponding transmission time interval is calculated according to the following formula (2):

[0070]

[0071] in, Indicates that the target is at T k+i The time slot sent is the same as T k The transmission time interval of the time slot; Tr ki represents the arrival time difference; T s represents the time of a single time slot; the symbol round(·) represents the rounding function.

[0072] In specific implementation, the matrix corresponding to all observations (i.e., N+M observations) includes:

[0073]

[0074] Specifically, Figure 5 Figure 2 shows a schematic diagram of the target distance and speed estimation principle. Figure 5 As shown, when the matrix A is full rank, the distance information between the target radiation source and the radiation speed information of the target radiation source at the corresponding target time K can be calculated according to the following formula (3):

[0075] X=α -1 b=(A T A) -1 A T B; (3)

[0076] in, r k At the target time T k The distance from the target radiation source, v k For T k The radiation speed at that time, u = v kx x k +v ky y k +vkz z k ,(x k ,y k ,z k ) are the coordinates in the x, y, and z directions, (v kx , v ky , v kz ) is the radiation velocity in the x, y, and z directions.

[0077] Furthermore, in some optional embodiments, the spatial observation area [-45°, 45°] can be divided into N beams, the width of the jth beam is Δθ=90° / (N-1), and the beam pointing is θ j =-45°+(j-1)·Δθ. The target angle θ is obtained by comparing the relative magnitudes of the envelope amplitudes of the output signals of adjacent beams. k In this way, the angle information of the target radiation source can be obtained by measuring the amplitude ratio of adjacent beams.

[0078] Thus, in S107, the target distance r k and target angle Θ k , the position coordinates of the target radiation source can be calculated according to the following formula (4):

[0079] x k =r k ·cos(Θ k ), y k =r k ·sin(Θ k ); (4)

[0080] Among them, cos(·) represents the sign of the cosine function, and sin(·) represents the sign of the sine function.

[0081] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0082] Based on the same technical concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides a single-station passive positioning device 600 for a frequency-hopping time-division multiple access signal radiation source, and the single-station passive positioning device 600 for a frequency-hopping time-division multiple access signal radiation source is applied to a fixed single station.

[0083] like Figure 6As shown, the single-station passive positioning device 600 of the frequency-hopping time-division multiple access signal radiation source may include:

[0084] The receiving module 601 is used to receive the radiation signal of the target radiation source in frequency bands according to a plurality of pre-divided frequency bands, wherein the radiation signal is a frequency hopping time division multiple access signal, and the plurality of frequency bands are divided according to the frequency hopping range of the radiation signal;

[0085] The filtering module 602 is used to perform broadband filtering and narrowband mixing filtering in parallel on the radiation signals corresponding to the respective frequency bands to obtain a plurality of narrowband filtered data;

[0086] The sorting module 603 is used to perform threshold detection on the narrow-band filtered data to obtain the arrival time of each pulse, and sort the arrival times according to the order of arrival time to obtain a number of candidate time points after sorting;

[0087] A division module 604 is used to divide the trajectory into segments according to the target motion characteristics to obtain a number of uniform speed straight line segments;

[0088] A determination module 605 is used to determine, for each uniform straight line segment, a radiation signal corresponding to each candidate moment from a first moment corresponding to a first preset value before a preset moment to a second moment corresponding to a second preset value among a plurality of candidate moments as an observation value;

[0089] A first calculation module 606, configured to calculate the distance information from the target radiation source at the corresponding target time according to the arrival time difference between any two adjacent observation values;

[0090] The second calculation module 607 is used to calculate the position information of the target radiation source according to the distance information between the target radiation source and the target radiation source at the target time and the angle information of the target radiation source obtained by measuring the amplitude ratio of adjacent beams.

[0091] In some embodiments, the filtering module 602 is specifically used to perform the following steps in parallel for the radiation signals corresponding to several frequency bands: directly sampling the radiation signal at RF to obtain a sampled signal; digitally down-converting and broadband filtering the sampled signal according to the frequency band to obtain a broadband filtered signal; mixing, extracting and low-pass filtering the broadband filtered signal according to the local oscillator signals corresponding to several frequency points to obtain several narrowband filtered data, wherein the center frequency of the local oscillator signal is the frequency of the corresponding frequency point controlled by the frequency point.

[0092] In some embodiments, the single-station passive positioning device 600 of the frequency-hopping time-division multiple access signal radiation source further includes a third calculation module ( Figure 6 (not shown), is used to calculate the arrival time difference Tr between any two adjacent observations according to the following formulaki :

[0093] T ki =t k+i -t k ;

[0094] Among them, t k+i Indicates that the radiation signal is at T k+i The signal arrival time at k Indicates that the radiation signal is at T k The signal arrival time at is, i∈[-N,M] and i is a positive integer, N is a first preset value, and M is a second preset value.

[0095] In some embodiments, the first calculation module 606 is specifically used to calculate the corresponding transmission time interval based on the time slot characteristics of the radiation signal and the arrival time difference; construct a matrix corresponding to all observation values ​​based on the transmission time interval; and when the matrix is ​​full rank, calculate the distance information between the target radiation source and the radiation speed information of the target radiation source at the corresponding target time.

[0096] Optionally, calculate the corresponding transmission time interval according to the following formula

[0097]

[0098] Among them, Tr ki represents the arrival time difference; T s represents the time of a single time slot; the symbol round(·) represents the rounding function.

[0099] Optionally, the matrix corresponding to all observations includes:

[0100]

[0101] Optionally, when the matrix is ​​full rank, the distance information from the target radiation source and the radiation speed information of the target radiation source at the corresponding target time are calculated according to the following formula:

[0102] X=α -1 b=(A T A) -1 A T B;

[0103] in, r k At the target time T k The distance from the target radiation source, v k For T k The radiation speed at that time, u = v kx x k +vky y k +v kz z k ,(x k ,y k ,z k ) are the coordinates in the x, y, and z directions, (v kx , v ky , v kz ) is the radiation velocity in the x, y, and z directions.

[0104] It should be noted that, for the convenience of description, the above device is described in various modules according to their functions. Of course, when implementing this application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0105] The device of the above embodiment is used to implement the single-station passive positioning method of the corresponding frequency-hopping time-division multiple access signal radiation source in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0106] Based on the same technical concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides an electronic device.

[0107] Figure 7 A more specific schematic diagram of the hardware structure of an electronic device provided by this embodiment is shown.

[0108] The electronic device 700 may include a processor 701 and a memory 702 storing computer program instructions.

[0109] Specifically, the processor 701 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0110] The memory 702 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 702 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 702 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 702 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 702 is a non-volatile solid-state memory.

[0111] In certain embodiments, the memory may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to one aspect of the present application.

[0112] The processor 701 reads and executes the computer program instructions stored in the memory 702 to implement any single-station passive positioning method for a frequency-hopping time-division multiple access signal radiation source in the above embodiments.

[0113] In some examples, the electronic device 700 may further include a communication interface 703 and a bus 710. Figure 7 As shown, the processor 701, the memory 702, and the communication interface 703 are connected via a bus 710 and communicate with each other.

[0114] The communication interface 703 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0115] Bus 710 includes hardware, software or both, and the parts of online data flow billing equipment are coupled to each other. For example, but not limitation, bus 710 may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front-end bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 710 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the present application considers any suitable bus or interconnection.

[0116] Exemplarily, the electronic device 700 may be a mobile phone, a tablet computer, a laptop computer, a PDA, an in-vehicle electronic device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA).

[0117] Based on the same technical concept, corresponding to any of the above-mentioned embodiments, the present application also provides a non-transitory computer-readable storage medium. The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any single-station passive positioning method of the frequency-hopping time-division multiple access signal radiation source in the above-mentioned embodiments is implemented. Examples of computer-readable storage media include non-transitory computer-readable storage media, such as portable disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, etc.

[0118] Based on the same technical concept, corresponding to any of the above-mentioned embodiments, the present application also provides a computer program product, which includes computer program instructions. In some embodiments, the computer program instructions can be executed by one or more processors of a computer so that the computer and / or the processor execute the single-station passive positioning method for a frequency-hopping time-division multiple access signal radiation source. Corresponding to the execution subject corresponding to each step in each embodiment of the single-station passive positioning method for a frequency-hopping time-division multiple access signal radiation source, the processor that executes the corresponding step may belong to the corresponding execution subject.

[0119] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0120] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0121] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0122] The above reference is according to the method of the embodiment of the present application, the flow chart of the device (system) and the computer program product and / or the block diagram described various aspects of the present application.It should be understood that each square box in the flow chart and / or the block diagram and the combination of each square box in the flow chart and / or the block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more square boxes of the flow chart and / or the block diagram.Such a processor can be but is not limited to a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit.It can also be understood that each square box in the block diagram and / or the flow chart and the combination of the square boxes in the block diagram and / or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

[0123] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application.

Claims

1. A single-station passive positioning method for a frequency-hopping time-division multiple access signal radiation source, characterized in that: Applied to a fixed single station, the method comprises: According to a plurality of pre-divided frequency bands, receiving the radiation signal of the target radiation source in frequency bands, the radiation signal is a frequency hopping time division multiple access signal, and the plurality of frequency bands are divided according to the frequency hopping range of the radiation signal; Broadband filtering and narrowband mixing filtering are performed in parallel on radiation signals corresponding to several frequency bands to obtain several narrowband filtered data; Perform threshold detection on the narrowband filtered data to obtain the arrival time of each pulse, and sort them according to the order of arrival time to obtain several candidate time points after sorting; The trajectory is segmented according to the target motion characteristics to obtain several uniform speed straight line segments; For each uniform straight line segment, a radiation signal corresponding to each candidate time from a first moment corresponding to a first preset value before a preset moment to a second moment corresponding to a second preset value among the candidate time moments is determined as an observation value; According to the arrival time difference between any two adjacent observation values, calculate the distance information between the target radiation source at the corresponding target time; The position information of the target radiation source is calculated based on the distance information from the target radiation source at the target moment and the angle information of the target radiation source obtained by measuring the amplitude ratio of adjacent beams.

2. The method according to claim 1, characterized in that The broadband filtering process and the narrowband mixing filtering process are performed in parallel on the radiation signals corresponding to the plurality of frequency bands to obtain a plurality of narrowband filtered data, including: The following steps are performed in parallel for the radiation signals corresponding to several frequency bands: Perform radio frequency direct sampling on the radiation signal to obtain a sampled signal; The sampled signal is digitally down-converted and subjected to wideband filtering extraction according to the frequency band to obtain a signal extracted by wideband filtering; According to the local oscillator signals corresponding to several frequency points, the signal extracted by broadband filtering is mixed, extracted and low-pass filtered to obtain several narrow-band filtered data, wherein the center frequency of the local oscillator signal is the frequency of the corresponding frequency point through frequency point control.

3. The method according to claim 1, characterized in that Before calculating the distance information from the target radiation source at the corresponding target time according to the arrival time difference between any two adjacent observation values, the method further includes: The arrival time difference Tr between any two adjacent observations is calculated according to the following formula ki : Tr ki =t k+i -t k ; Among them, t k+i Indicates that the radiation signal is at T k+i The signal arrival time at k Indicates that the radiation signal is at T k The signal arrival time at is, i∈[-N,M] and i is a positive integer, N is a first preset value, and M is a second preset value.

4. The method according to claim 1, characterized in that: The step of calculating the distance information from the target radiation source at the corresponding target time according to the arrival time difference between any two adjacent observation values ​​includes: Calculating the corresponding transmission time interval according to the time slot characteristics of the radiation signal and the arrival time difference; According to the emission time interval, construct a matrix corresponding to all observation values; When the matrix is ​​of full rank, the distance information from the target radiation source and the radiation speed information of the target radiation source at the corresponding target time are calculated.

5. The method according to claim 4, characterized in that The calculating the corresponding transmission time interval according to the time slot characteristics of the radiation signal and the arrival time difference comprises: Calculate the corresponding transmission time interval according to the following formula Among them, Tr ki represents the arrival time difference; T s represents the time of a single time slot; the symbol round(·) represents the rounding function.

6. The method according to claim 4, characterized in that The matrix corresponding to all observations includes: When the matrix is ​​full rank, calculating the distance information between the target radiation source and the speed information of the target radiation source at the corresponding target time includes: When the matrix is ​​full rank, the distance information from the target radiation source and the radiation speed information of the target radiation source at the corresponding target time are calculated according to the following formula: X=a -1 b=(A T A) -1 A T B; in, r k At the target time T k The distance from the target radiation source, v k For T k The radiation speed at that time, u = v kx x k +v ky y k +v kz z k ,(x k ,y k ,z k ) are the coordinates in the x, y, and z directions, (v kx , v ky , v kz ) is the radiation velocity in the x, y, and z directions.

7. A single-station passive positioning device for a frequency-hopping time-division multiple access signal radiation source, characterized in that: Applied to a fixed single station, the device comprises: A receiving module, used for receiving the radiation signal of the target radiation source in frequency bands according to a plurality of pre-divided frequency bands, wherein the radiation signal is a frequency hopping time division multiple access signal, and the plurality of frequency bands are divided according to the frequency hopping range of the radiation signal; A filtering module is used to perform broadband filtering and narrowband mixing filtering in parallel on radiation signals corresponding to several frequency bands to obtain several narrowband filtered data; A sorting module is used to perform threshold detection on the narrow-band filtered data to obtain the arrival time of each pulse, and sort the arrival times according to the order of arrival time to obtain a number of candidate time points after sorting; A segmentation module is used to segment the trajectory according to the target motion characteristics to obtain a number of uniform speed straight line segments; A determination module, for determining, for each uniform straight line segment, a radiation signal corresponding to each candidate moment from a first moment corresponding to a first preset value before a preset moment to a second moment corresponding to a second preset value among a plurality of candidate moments as an observation value; A first calculation module is used to calculate the distance information between the target radiation source and the target radiation source at the corresponding target time according to the arrival time difference between any two adjacent observation values; The second calculation module is used to calculate the position information of the target radiation source according to the distance information between the target radiation source and the target radiation source at the target time and the angle information of the target radiation source obtained by adjacent beam amplitude ratio measurement.

8. An electronic device, characterized in that: The device comprises: a processor and a memory storing computer program instructions; when the processor calls the computer program instructions, the single-station passive positioning method for the frequency-hopping time-division multiple access signal radiation source as described in any one of claims 1-6 is implemented.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, which, when called by a processor, implement the single-station passive positioning method for a frequency-hopping time-division multiple access signal radiation source as described in any one of claims 1-6.

10. A computer program product, characterized in that When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the single-station passive positioning method for a frequency-hopping time-division multiple access signal radiation source as described in any one of claims 1-6.

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