KR102221733B1 - Method and apparatus for real-time processing of signals received at the same time in a multistatic PCL(Passive Coherent Location) system - Google Patents

Abstract

In a method of processing signals received at the same time in real time in a multistatic PCL (Passive Coherent Location) system, receiving radio frequency (RF) signals from at least one transmission source, and for each of the RF signals, An index based on the reception time of each signal is set, frequency conversion and digital conversion are performed on RF signals to generate I/Q signal data blocks, and an index corresponding to each of the I/Q signal data blocks By comparison, I/Q signal data blocks received at the same time point are determined, and signal processing is simultaneously performed on each of the I/Q signal data blocks received at the same time point.

Description

Method and apparatus for real-time processing of signals received at the same time in a multistatic PCL (Passive Coherent Location) system Location) system}

The present disclosure relates to a method and apparatus for processing signals received at the same time point in real time in a multistatic PCL system.

The multistatic PCL (Passive Coherent Location) system is a system that detects and estimates the location of a target through signal processing with a direct signal radiated from a plurality of third transmission sources and a target reflected signal reflected and received from the target. .

Existing signal processing techniques use a method of limiting the size of electronic information data that is input and processed for real-time signal processing because there is a minimum execution time required for each step of the signal processing process, or hardware Methods to improve processing performance have been applied.

However, in this conventional method, since each step of the signal processing process is sequentially performed, a bottleneck may occur if the execution speed of each step is different, and if the size of input data is limited, it can be obtained through signal processing. There is a problem that a case in which the existing performance may be deteriorated.

It is to provide a method and apparatus for real-time processing of signals received at the same time point directly in a multi-static PCL system.

The technical problem to be achieved by the present embodiment is not limited to the technical problems as described above, and other technical problems may be inferred from the following embodiments.

According to an aspect of the present disclosure, a method of processing signals received at the same time in real time in a multistatic PCL (Passive Coherent Location) system comprises: receiving radio frequency (RF) signals from at least one transmission source ; For each of the RF signals, setting an index based on a reception time of each signal; Generating I/Q signal data blocks by performing frequency conversion and digital conversion on the RF signals; Comparing an index corresponding to each of the I/Q signal data blocks to determine I/Q signal data blocks received at the same time point; And simultaneously performing signal processing on each of the I/Q signal data blocks received at the same time point, wherein the signal processing comprises: I/Q signal data blocks received at the same time point. When a plurality of signal processing processes are performed for each, and the execution time of each of the plurality of signal processing processes exceeds a signal reception period, at least some of the I/Q signal data blocks received at the same time are omitted. And, the plurality of signal processing processes may include a process of performing digital beam forming, a process of removing an interference signal, a process of estimating a time difference and a frequency difference, and a process of estimating a position of a target.

In addition, the index may include information representing a reception time point at which each of the RF signals is received in a binary format.

In addition, the step of determining the I/Q signal data blocks received at the same time may include a space of a buffer storing I/Q signal data blocks received at the same time among the total space of the buffer in the multistatic PCL system. When the ratio is greater than or equal to a preset ratio, the step of omitting at least some of the I/Q signal data blocks received at the same time may be further included.

delete

Further, the performing of the signal processing may include: predicting an execution time of each of the plurality of signal processing processes; Comparing, for each of the plurality of signal processing processes, a maximum value of an execution time predicted in each signal processing process; And reallocating resources of the central processing unit in the multistatic PCL system in proportion to a maximum value of execution time predicted in each signal processing process, based on the comparison result.

Further, the performing of the signal processing may include: predicting an execution time of each of the plurality of signal processing processes; Comparing an execution time predicted in each signal processing process and a threshold time preset in each signal processing process for each of the plurality of signal processing processes; And reallocating resources of the central processing unit in the multistatic PCL system based on the comparison result.

In addition, the step of setting the index may further include verifying validity of electronic information included in each signal for each of the RF signals for which the index is set.

According to another aspect, in a computer-readable recording medium in which a program for implementing a method of processing signals received at the same time in real time in a multistatic PCL (Passive Coherent Location) system is recorded, the method The step of receiving radio frequency (RF) signals from at least one transmission source; For each of the RF signals, setting an index based on a reception time of each signal; Generating I/Q signal data blocks by performing frequency conversion and digital conversion on the RF signals; Comparing an index corresponding to each of the I/Q signal data blocks to determine I/Q signal data blocks received at the same time point; And simultaneously performing signal processing on each of the I/Q signal data blocks received at the same time point, wherein the signal processing module includes, for each of the I/Q signal data blocks received at the same time point. When performing a plurality of signal processing processes and the execution time of each of the plurality of signal processing processes exceeds a signal reception period, at least some of the I/Q signal data blocks received at the same time are omitted, and the The plurality of signal processing processes may include a process of performing digital beam forming, a process of removing an interference signal, a process of estimating a time difference and a frequency difference, and a process of estimating a position of a target.

According to another aspect, in a computer program stored in a medium to execute a method of processing signals received at the same time in real time in a multistatic (Multistatic) Passive Coherent Location (PCL) system in combination with hardware, the method comprises: Receiving radio frequency (RF) signals from at least one transmission source; For each of the RF signals, setting an index based on a reception time of each signal; Generating I/Q signal data blocks by performing frequency conversion and digital conversion on the RF signals; Comparing an index corresponding to each of the I/Q signal data blocks to determine I/Q signal data blocks received at the same time point; And simultaneously performing signal processing on each of the I/Q signal data blocks received at the same time point, wherein the signal processing comprises: I/Q signal data blocks received at the same time point. When a plurality of signal processing processes are performed for each, and the execution time of each of the plurality of signal processing processes exceeds a signal reception period, at least some of the I/Q signal data blocks received at the same time are omitted. And, the plurality of signal processing processes may include a process of performing digital beam forming, a process of removing an interference signal, a process of estimating a time difference and a frequency difference, and a process of estimating a position of a target.

1 is a diagram for describing an example of a multistatic PCL (Passive Coherent Location) system.
2 is a diagram for describing an example of each module constituting a multistatic PCL system.
3 is a flowchart illustrating an example of a signal processing algorithm of a multistatic PCL system.
4 is a diagram illustrating an example of a case where the execution time is different for each step of a signal processing process.
5 is a diagram illustrating an example of a case where the execution time is the same for each step of a signal processing process.
6 is a diagram illustrating an example of redistributing resources of a central processing unit according to execution time of each step of a signal processing process.
7 is a diagram illustrating an example of a deliberate omission algorithm that omits at least some of I/Q signal data blocks.
8 is a flowchart illustrating an example of a method of processing signals received at the same time point in real time in a multistatic PCL (Passive Coherent Location) system.

The terms used in the embodiments were selected from general terms that are currently widely used as possible while considering the functions in the embodiments, but this varies depending on the intention or precedent of a technician engaged in the relevant technical field, the emergence of new technologies, etc. I can. In addition, in a specific case, there are terms that are arbitrarily selected, and in this case, the meaning will be described in detail in the description of the corresponding embodiment. Accordingly, the terms used in the present embodiments should be defined based on the meaning of the term and the contents of the present embodiments, not a simple name of the term.

In the descriptions of the embodiments, when a part is said to be connected to another part, this includes not only the case that it is directly connected, but also the case that it is electrically connected with another component interposed therebetween. . In addition, when a part includes a certain component, it means that other components may be further included, rather than excluding other components unless specifically stated to the contrary.

Terms such as "consist of" or "includes" used in the present embodiments should not be construed as necessarily including all of the various components, or various steps described in the specification, and some of the components or It should be construed that some steps may not be included, or may further include additional elements or steps.

The description of the following embodiments should not be construed as limiting the scope of the rights, and what those skilled in the art can easily infer should be construed as belonging to the scope of the embodiments. Hereinafter, embodiments for illustration only will be described in detail with reference to the accompanying drawings.

1 is a diagram for describing an example of a multistatic PCL (Passive Coherent Location) system.

Referring to FIG. 1, the multi-static PCL system 100 uses signals radiated from a plurality of transmission sources 110 #1 to #M, and radiation signals of a plurality of transmission sources 110 #1 to #M are targeted ( It is a system that estimates the position of the target 120 by using the signal reflected by 120). Meanwhile, other general-purpose elements other than the elements shown in FIG. 1 may be further included in the multistatic PCL system 100.

In order to estimate the position of the target in all directions, the multi-static PCL system 100 may utilize a plurality of transmission sources 110 #1 to #M that exist at different positions and have different carrier frequencies. By utilizing a plurality of transmission sources 110 #1 to #M having different frequencies, it is possible to solve the problem of overlapping frequencies.

Each of the plurality of transmission sources 110 #1 to #M may be a transmission station for a broadcast signal. For example, the plurality of transmitters 110 may include at least one of FM radio, digital audio broadcasting (DAB), and digital video broadcasting-terrestrial (DVBT). However, the present invention is not limited thereto, and the plurality of transmission sources 110 may correspond to various signal sources that can be used for location detection of a target while operating independently of the multi-static PCL system 100.

The multi-static PCL system 100 may receive signals by separating the plurality of transmission sources 110 into a reference channel and a monitoring channel for each of #1 to #M. For example, in the multi-static PCL system 100, signals radiated from a plurality of transmission sources 110 #1 to #M are received through a line of sight (LOS) path between the corresponding transmission source and the multistatic PCL system 100. The signal data may be received, and a target reflected signal may be received by reflecting signals radiated from the plurality of transmission sources 110 #1 to #M to the target.

The multistatic PCL system 100 may detect the position of a target based on the acquired direct signal data and target reflected signal data.

2 is a diagram for describing an example of each module constituting a multistatic PCL system.

Referring to FIG. 2, the multistatic PCL system 100 may include a signal reception module 110, a signal processing module 120, a situation display module 130, and an operation data storage module 140.

The signal reception module 110 may include an antenna 111 and N signal measurement plates 112. For example, the antenna 111 may be an array antenna, and the array antenna consists of a plurality of antenna elements that are installed according to a certain arrangement to receive radio frequency (RF) signals transmitted from the plurality of transmission sources 110 Can be. The plurality of antenna elements constituting the array antenna may receive RF signals transmitted from the plurality of transmission sources 110 with different sizes and phases. In addition, antenna elements of the array antenna may be arranged according to various arrangement methods. Depending on the degree to which the antenna elements are spatially spaced apart, signals received by the antenna elements may have a specific phase difference from each other. For example, the antenna elements may be arranged according to a uniform circular array.

Each of the N signal measurement plates 112 receives RF signals #1 to #N input from each of a plurality of antenna elements #1 to #M constituting an array antenna, and a plurality of transmission sources 110 #1 to # In the wireless broadcasting service provided by M, bandpass filtering to remove signal components outside the entire frequency band specified in M can be performed and amplified with a low noise amplifier. Accordingly, each of the RF signals #1 to #N may be filtered to have only signal components of the entire frequency band used by the plurality of transmission sources 110 #1 to #M. Each of the N signal measuring plates 112 may convert into IF (Intermediate Frequency) signals #1 to #N suitable for digitization by an analog-digital converter (ADC) operation by performing frequency conversion after an amplification process.

In addition, each of the N signal measurement plates 112 may convert IF signals #1 to #N, respectively, to AD (Analog-Digital), thereby generating digitized ADC data #1 to #N. Thereafter, for each of the ADC data #1 to #L, each ADC data is passed through a DDC (Direct Digital Control Controller) that converts the transmission channels used in the plurality of transmission sources 110, #1 to #M, into baseband, respectively. , I/Q signals #1 to #N can be generated for each transmission source.

The signal processing module 120 may be composed of N signal processors 121 and may distribute and process electronic information collected from the N signal measuring plates 112. The signal processing module 120 may include N signal processors 121. The N signal processors 121 may receive I/Q signals from each of the N signal measuring plates 112 and perform a plurality of processing processes. For example, the plurality of processing processes are a process of performing digital beam forming step by step (step 1), a process of removing an interference signal (step 2), a process of estimating a time difference and a frequency difference (step 3). And estimating the position of the target (step 4).

The situation display module 130 may display a signal processing state and an operation state of each signal processor 121 constituting the signal processing module 120.

The operation data storage module 140 may store electronic information collected by each signal processor 121 constituting the signal processing module 120.

3 is a flowchart illustrating an example of a signal processing algorithm of a multistatic PCL system.

In step 300, the multistatic PCL system 100 may receive radio frequency (RF) signals from at least one transmission source.

In step 305, the multistatic PCL system 100 may set an index for each of the RF signals based on the reception time of each signal. For example, the signal measurement plate 112 may give each of the RF signals a unique index according to the time of reception before transmitting the electronic information of the collected signals to the signal processing module 120. The manner in which each of the N signal measuring plates 112 is assigned a unique index is shown in Table 1 below.

Item Signal plate number Collection number Signal handler number Processing step number When to receive One 3 2 5 Hour: 5 bits. 0~23h
Minute: 6 beats. 0~59m
Second: 6 bits. 0~59s

For example, the index assigned to the RF signal may be composed of fields indicating a signal measurement plate number, a collection number, a signal processor number, a processing step number, and a reception time point, respectively. Referring to [Table 1], for an arbitrary RF signal, the processing of the third signal collected at 17:23:20 by the signal measuring plate 1 is processed by the signal processor 2, and the processing process If the step of is 5, an index may be assigned as shown in [Table 1]. Meanwhile, the information included in the index assigned as shown in [Table 1] is expressed in a binary format, and can be expressed as shown in [Table 2].

Item Signal plate number Collection number Signal handler number Processing step number When to receive One 11 10 101 1010001011110001

In step 310, the multistatic PCL system 100 may generate inphase and quadrature (I/Q) signal data blocks by performing frequency conversion and digital conversion on RF signals. For example, each of the N signal measuring plates 112 may perform bandpass filtering to remove signal components outside of the entire frequency band specified in the RF signals and amplify them with a low noise amplifier. After the amplification process, each of the N signal measuring plates 112 may convert into IF (Intermediate Frequency) signals suitable for digitization by an analog-digital converter (ADC) operation by performing frequency conversion. Thereafter, each of the IF signals is converted to AD (Analog-Digital), generating digitized ADC data, and converting each of the transmission channels used in the plurality of transmission sources 110 #1 to #M into basebands. By passing through a DDC (Direct Digital Control Controller), I/Q signal data blocks can be generated.

In step 315, the multi-static PCL system 100 may verify the validity of each of the I/Q signal data blocks and integrate the result of the validation. For example, after each of the N signal processors 121 verify the validity of the input electronic information, it may notify the validity of one of the N signal processors 121 to one of the N signal processors 121, and notify the validity of the inputted electronic information. The received work signal processor can incorporate the validation results.

In step 320, the multistatic PCL system 100 may determine whether all of the I/Q signal data blocks are valid. For example, a signal processor incorporating a result of verifying the validity of electronic information from the N signal processors 121 may determine whether all of the I/Q signal data blocks are valid. If it is determined that all of the I/Q signal data blocks are valid, the process may proceed to step 325. If it is determined that not all of the I/Q signal data blocks are valid, the process may proceed to step 300.

In step 325, the multi-static PCL system 100 may put the I/Q signal data blocks into the signal processing queue. For example, one signal processor incorporating the results of verifying the validity of electronic information from the N signal processors 121 checks the validity of the electronic information collected by each signal processor 121, and then proceeds with signal processing. Can be notified to each signal processor 121. When the results of verifying the validity of the electronic information from the N signal processors 121 are combined and it is determined that each of the I/Q signal data blocks are valid, each signal processor 121 is In order to perform a step-by-step signal processing process, I/Q signal data blocks can be put into a signal processing queue.

In step 330, the multistatic PCL system 100 may compare indices corresponding to the I/Q signal data blocks. For example, each of the N signal processors 121 may share indices corresponding to I/Q signal data blocks with each other and compare the shared indices.

In step 335, the multistatic PCL system 100 may determine I/Q signal data blocks having the same index field corresponding to the reception time point. As described above in step 305, the index may include fields indicating a signal measurement plate number, a collection number, a signal processor number, a processing step number, and a reception time point, respectively. In this case, if the index field corresponding to the reception time point among the indexes corresponding to the I/Q signal data blocks is the same, it can be considered that the I/Q signal data blocks have been received at the same time point. Meanwhile, the multi-static PCL system 100 may determine I/Q signal data blocks having the same index field corresponding to a collection number and a processing step number as well as a reception time point. Through this, I/Q signal data blocks received by the signal receiving module at the same time and placed in the same processing step can be determined.

In step 340, the multistatic PCL system 100 may predict an execution time for each step of the signal processing process. For example, the multistatic PCL system 100 performs a digital beam forming process (step 1), a process of removing an interference signal (step 2), a process of estimating a time difference (step 3), a frequency It is possible to estimate the time it takes to perform each of the process of estimating the difference (step 4) and the process of estimating the position of the target (step 5).

In step 345, the multistatic PCL system 100 may redistribute resources of the central processing unit by comparing the maximum value of execution time for each step of the predicted signal processing process. For example, the multistatic PCL system 100 may allocate resources of the central processing unit in proportion to the execution time of each step of the predicted signal processing process. In addition, the multistatic PCL system 100 may redistribute resources of the central processing unit by comparing the maximum value of the execution time for each step of the predicted signal processing process and a preset threshold value. The threshold of the execution time preset for each step may be set in consideration of a signal reception period.

In step 350, the multi-static PCL system 100, when the space of the buffer storing the same I/Q signal data blocks in the index field corresponding to the reception time is equal to or greater than a preset ratio, the index field corresponding to the reception time is the same I At least some of the /Q signal data blocks may be omitted. For example, each of the N signal processors 121 can secure real-time signal processing through such a deliberate omission algorithm.

In step 355, the multistatic PCL system 100 may transmit a signal processing state to the situation display module 130.

In step 360, the multi-static PCL system 100 may determine whether the signal processing process has ended. If the signal processing process has not been completed, the process proceeds to step 330.

4 is a diagram illustrating an example of a case where the execution time is different for each step of a signal processing process.

Referring to FIG. 4, a signal processing process is performed on each of the received I/Q signal data blocks #1 to #5, and the signal processing process may be processed in parallel for each step. For example, steps A, B, C, and D are each a process of performing digital beam forming (step 1), a process of removing an interference signal (step 2), and estimating a time difference and a frequency difference. It may correspond to each of the process (step 3) and the process of estimating the position of the target (step 4), but is not limited thereto.

4, the execution time is different for each of the steps A, B, C, and D. In particular, the execution time of step B is longer than that of steps A, C, and D, so that in each step processed in parallel It can be seen that it is impossible to process the signal in real time. In addition, a bottleneck may occur as the execution speed of each step is different, and a memory full phenomenon may occur due to an increase in processing target I/Q signal data blocks in the signal processing queue.

5 is a diagram illustrating an example of a case where the execution time is the same for each step of a signal processing process.

Referring to FIG. 5, a signal processing process is performed on each of the received I/Q signal data blocks #1 to #5 as in FIG. 4. In this case, unlike FIG. 4, each of the steps A, B, C, and D has the same execution speed, so that it is possible to process signals in real time in each step processed in parallel.

However, real-time processing is possible until the execution time of each step is within the signal reception period, and if the execution time exceeds the signal reception period, the electronic information of the received signal is intentionally omitted to process the signal in real time. This will be described later with reference to FIG. 7.

6 is a diagram illustrating an example of redistributing resources of a central processing unit according to execution time of each step of a signal processing process.

Referring to FIG. 6, when each step of the signal processing process is performed on received I/Q signal data blocks, the multistatic PCL system measures the signal processing execution time for each step, and according to the signal processing execution time. The resources of the central processing unit can be reallocated.

For example, each step of the signal processing process may include checking the validity of electronic information of received I/Q signal data blocks, step A, step B, step C, and step D. Steps A, B, C, and D are each a process of performing digital beam forming (step 1), a process of removing an interference signal (step 2), a process of estimating a time difference and a frequency difference (3 Step) and the process of estimating the position of the target (step 4), but are not limited thereto.

In the case of FIG. 6, since the signal processing execution time in step A of each step of the signal processing process is long, and the signal processing queue is increasing in step A, resources of the central processing unit can be concentrated in step A. Accordingly, it is possible to solve the bottleneck and enable real-time signal processing.

7 is a diagram illustrating an example of a deliberate omission algorithm that omits at least some of I/Q signal data blocks.

Referring to FIG. 7, I/Q signal data blocks having the same index field corresponding to a reception time point, that is, I/Q signal data blocks received at the same time point, are stored in buffers #1 to #8 in the multistatic PCL system. The signal processing process is performed.

At this time, if the space of the buffer storing I/Q signal data blocks received at the same time among the total space of buffers #1 to #8 in the multistatic PCL system is more than a preset ratio, the I/Q received at the same time At least some of the Q signal data blocks may be intentionally omitted.

For example, the signal processing module in the multistatic PCL system may skip and process a buffer storing I/Q signal data blocks in the multistatic PCL system at a ratio of the signal acquisition time to the signal processing execution time. 7, buffers #1, #3, and #5 in the multistatic PCL system are selected to process I/Q signal data blocks stored in the selected buffer, and I/Q signal data blocks stored in the remaining buffers are intentionally omitted. Thus, real-time processing can be made possible.

8 is a flowchart illustrating an example of a method of processing signals received at the same time point in real time in a multistatic PCL (Passive Coherent Location) system.

In step 810, the multistatic PCL system may receive radio frequency (RF) signals from at least one transmission source. The at least one transmitter may include at least one of FM radio, digital audio broadcasting (DAB), and digital video broadcasting-terrestrial (DVBT). The multistatic PCL system may receive RF signals transmitted from at least one transmission source through an array antenna, for example, with different magnitudes and phases.

In step 820, the multistatic PCL system may set an index based on the reception time of each of the RF signals. The index may be composed of fields indicating a signal measurement plate number, a collection number, a signal processor number, a processing step number, and a reception time point, respectively. In addition, the index may include information representing a reception point at which each of the RF signals is received in a binary format.

In step 830, the multistatic PCL system may generate inphase and quadrature (I/Q) signal data blocks by performing frequency conversion and digital conversion on RF signals.

In step 840, the multistatic PCL system may determine the I/Q signal data blocks received at the same time by comparing the indexes corresponding to each of the I/Q signal data blocks. In this case, if the index field corresponding to the reception time point among the indexes corresponding to the I/Q signal data blocks is the same, it can be considered that the I/Q signal data blocks have been received at the same time point. Meanwhile, the multi-static PCL system may determine I/Q signal data blocks having the same index field corresponding to a collection number and a processing step number as well as a reception time point.

In step 850, the multistatic PCL system may simultaneously perform signal processing on each of the I/Q signal data blocks received at the same time point. The multistatic PCL system can perform a plurality of signal processing processes for each of the I/Q signal data blocks received at the same time point, and the plurality of signal processing processes are a process of performing digital beam forming and interference. It may include a process of removing a signal, a process of estimating a time difference and a frequency difference, and a process of estimating a position of a target.

Meanwhile, the above-described embodiments of the present invention can be written in a program that can be executed on a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable recording medium. In addition, the structure of the data used in the above-described embodiment of the present invention can be recorded on a computer-readable recording medium through various means. The computer-readable recording medium includes a storage medium such as a magnetic storage medium (eg, ROM, floppy disk, hard disk, etc.), and an optical reading medium (eg, CD-ROM, DVD, etc.).

Claims (10)

In a method of processing signals received at the same time in real time in a multistatic PCL (Passive Coherent Location) system,
Receiving radio frequency (RF) signals from at least one transmission source;
For each of the RF signals, setting an index based on a reception time of each signal;
Generating I/Q signal data blocks by performing frequency conversion and digital conversion on the RF signals;
Comparing an index corresponding to each of the I/Q signal data blocks to determine I/Q signal data blocks received at the same time point; And
And simultaneously performing signal processing on each of the I/Q signal data blocks received at the same time point,
The step of performing the signal processing,
Performing a plurality of signal processing processes for each of the I/Q signal data blocks received at the same time point,
Predict the execution time of each of the plurality of signal processing processes, reallocate resources of the central processing unit in the multistatic PCL system based on the predicted execution time,
When the execution time of each of the plurality of signal processing processes exceeds the signal reception period, at least some of the I/Q signal data blocks received at the same time are omitted,
The plurality of signal processing processes include a process of performing digital beam forming, a process of removing an interference signal, a process of estimating a time difference and a frequency difference, and a process of estimating a position of a target. The method of claim 1,
The index is,
A method including information representing a reception time point at which each of the RF signals is received in a binary format. The method of claim 1,
The step of determining the I/Q signal data blocks received at the same time point,
If the space of the buffer storing the I/Q signal data blocks received at the same time out of the total space of the buffer in the multistatic PCL system is more than a preset ratio, among the I/Q signal data blocks received at the same time The method further comprising omitting at least some. delete The method of claim 1,
The step of performing the signal processing,
Predicting an execution time of each of the plurality of signal processing processes;
Comparing, for each of the plurality of signal processing processes, a maximum value of an execution time predicted in each signal processing process; And
And reallocating resources of the central processing unit in the multistatic PCL system in proportion to the maximum value of the execution time predicted in each signal processing process, based on a result of comparing the maximum value of the execution time. The method of claim 1,
The step of performing the signal processing,
Predicting an execution time of each of the plurality of signal processing processes;
Comparing an execution time predicted in each signal processing process and a threshold time preset in each signal processing process for each of the plurality of signal processing processes; And
And reallocating resources of a central processing unit in the multistatic PCL system based on a result of comparing the execution time and the threshold time. The method of claim 1,
The step of setting the index,
The method further comprising verifying validity of electronic information included in each signal for each of the RF signals for which the index is set. In a device that processes signals received at the same time in real time in a multistatic PCL (Passive Coherent Location) system,
Receive radio frequency (RF) signals from at least one transmission source, set an index based on the reception time of each signal for each of the RF signals, and perform frequency conversion and digital conversion for the RF signals. A signal receiving module for generating I/Q signal data blocks; And
By comparing the indexes corresponding to each of the I/Q signal data blocks, the I/Q signal data blocks received at the same time point are determined, and a signal for each of the I/Q signal data blocks received at the same time point Including a signal processing module to perform processing,
The signal processing module,
Performing a plurality of signal processing processes for each of the I/Q signal data blocks received at the same time point,
Predict the execution time of each of the plurality of signal processing processes, reallocate resources of the central processing unit in the multistatic PCL system based on the predicted execution time,
When the execution time of each of the plurality of signal processing processes exceeds the signal reception period, at least some of the I/Q signal data blocks received at the same time are omitted,
The plurality of signal processing processes include a process of performing digital beam forming, a process of removing an interference signal, a process of estimating a time difference and a frequency difference, and a process of estimating a position of a target. In a computer-readable recording medium in which a program for real-time processing of signals received at the same time point in a multistatic PCL (Passive Coherent Location) system is recorded,
The above method,
Receiving radio frequency (RF) signals from at least one transmission source;
For each of the RF signals, setting an index based on a time point of reception of the respective signals;
Generating I/Q signal data blocks by performing frequency conversion and digital conversion on the RF signals;
Comparing an index corresponding to each of the I/Q signal data blocks to determine I/Q signal data blocks received at the same time point; And
And simultaneously performing signal processing on each of the I/Q signal data blocks received at the same time point,
The step of performing the signal processing,
Performing a plurality of signal processing processes for each of the I/Q signal data blocks received at the same time point,
Predict the execution time of each of the plurality of signal processing processes, reallocate resources of the central processing unit in the multistatic PCL system based on the predicted execution time,
When the execution time of each of the plurality of signal processing processes exceeds the signal reception period, at least some of the I/Q signal data blocks received at the same time are omitted,
The plurality of signal processing processes include a process of performing digital beam forming, a process of removing an interference signal, a process of estimating a time difference and a frequency difference, and a process of estimating a position of a target. In a computer program stored in a medium to execute a method of processing signals received at the same time in real time in a multistatic PCL (Passive Coherent Location) system combined with hardware,
The above method,
Receiving radio frequency (RF) signals from at least one transmission source;
For each of the RF signals, setting an index based on a reception time of each signal;
Generating I/Q signal data blocks by performing frequency conversion and digital conversion on the RF signals;
Comparing an index corresponding to each of the I/Q signal data blocks to determine I/Q signal data blocks received at the same time point; And
And simultaneously performing signal processing on each of the I/Q signal data blocks received at the same time point,
The step of performing the signal processing,
Performing a plurality of signal processing processes for each of the I/Q signal data blocks received at the same time point,
Predict the execution time of each of the plurality of signal processing processes, reallocate resources of the central processing unit in the multistatic PCL system based on the predicted execution time,
When the execution time of each of the plurality of signal processing processes exceeds the signal reception period, at least some of the I/Q signal data blocks received at the same time are omitted,
The plurality of signal processing processes include a process of performing digital beam forming, a process of removing an interference signal, a process of estimating a time difference and a frequency difference, and a process of estimating a position of a target.

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