CN117805726A - Three-baseline interferometer baseline configuration method and device, electronic equipment and storage medium - Google Patents
Three-baseline interferometer baseline configuration method and device, electronic equipment and storage medium Download PDFInfo
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Abstract
The invention discloses a three-baseline interferometer baseline configuration method, a three-baseline interferometer baseline configuration device, electronic equipment and a storage medium, and relates to the technical field of electronic countermeasure. The baseline configuration method of the three-baseline interferometer comprises the steps of establishing constraint functions of signal phase differences and signal incidence angles corresponding to each baseline in the three-baseline interferometer; based on the constraint function, solving an estimated value of the phase difference fuzzy progression corresponding to the base line 6 and taking the estimated value as an estimated value of the total length of the base line of the three-base line interferometer; performing multiple simulation tests on the signal incidence angles to obtain correct ambiguity resolution probability and direction finding error corresponding to each baseline combination; an optimal baseline length of the three-baseline interferometer is determined based on a set of baseline combinations that correspond to the greatest probability of correct solution ambiguity and/or a set of baseline combinations that correspond to the least direction finding error. The three-baseline interferometer baseline configuration method, the three-baseline interferometer baseline configuration device, the electronic equipment and the storage medium can enable the three-baseline interferometer to achieve higher direction finding precision.
Description
Technical Field
The invention belongs to the technical field of electronic countermeasure, and particularly relates to a three-baseline interferometer baseline configuration method, a three-baseline interferometer baseline configuration device, electronic equipment and a storage medium.
Background
The multi-baseline interferometer direction finding principle is that a plurality of receiving antenna array elements are on the same straight line, the receiving antenna array elements receive radiation source signals from far field conditions, the direction of the radiation source is determined by measuring the phase difference between every two antenna array elements, the multi-baseline interferometer can realize single pulse direction finding, and the multi-baseline interferometer has the advantages of high direction finding precision, high speed, simple structure and the like, is a preferable technical system for realizing high-precision direction finding of the radiation source, and is widely applied to modern electronic countermeasure systems.
The three-baseline interferometer is used as the most common one in the multi-baseline interferometers, is often used for high-precision direction finding of a radiation source, and the configuration of the baselines in the three-baseline interferometer influences the direction finding precision of the three-baseline interferometer, if the configuration of the baselines in the three-baseline interferometer is unreasonable, the error of the three-baseline interferometer is larger, and the direction finding precision of the three-baseline interferometer is reduced. Therefore, how to provide an effective solution to reasonably configure the baselines of the tri-baseline interferometer is of great importance to ensure the direction-finding accuracy of the tri-baseline interferometer.
Disclosure of Invention
The invention aims to provide a three-baseline interferometer baseline configuration method, a three-baseline interferometer baseline configuration device, electronic equipment and a storage medium, so as to ensure the direction finding precision of the three-baseline interferometer.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in a first aspect, the present invention provides a baseline configuration method for a three-baseline interferometer, including:
establishing a constraint function of signal phase difference and signal incidence angle corresponding to each baseline in a three-baseline interferometer, wherein the three-baseline interferometer comprises antenna array elements 1, 2, 3 and 4, and the antenna array elements 1 and 2, 2 and 3, 3 and 4, 1 and 3, 2 and 4 and 1 and 4 sequentially form baselines 1, 2, 3, 4, 5 and 6;
based on the constraint function, determining a value range expression of the phase difference fuzzy progression corresponding to the base line 6;
determining an expression of a signal incident angle based on a value range expression of the phase difference fuzzy progression corresponding to the base line 6;
determining the phase difference fuzzy progression corresponding to the base lines 1, 2, 3, 4 and 5 based on the expression of the signal incidence angle-/>Is an expression of (2);
solving the estimated value of the phase difference fuzzy series corresponding to the base line 6 when the mean square error between the phase difference fuzzy series corresponding to the base lines 1, 2, 3, 4 and 5 and the approximate integer of the phase difference fuzzy series is minimum；
Estimated value of phase difference blur level corresponding to base line 6Solving for the angle of incidence +.>Estimate of +.>；
For each group of baseline combinations, performing multiple simulation tests on the signal incident angles to obtain the correct deblurring probability corresponding to each baseline combinationAnd direction finding error (rms)>；
Based on the corresponding correct de-blurring probabilityMaximum set of baseline combinations and/or corresponding direction finding errors (rms)A minimum set of baseline combinations determines an optimal baseline length for the tri-baseline interferometer.
Based on the disclosure, the invention establishes a constraint function of signal phase difference and signal incident angle corresponding to each baseline in the three-baseline interferometer, wherein the three-baseline interferometer comprises antenna array elements 1, 2, 3 and 4, and the antenna array elements 1 and 2, 2 and 3, 3 and 4, and 1 and 43. 2 and 4 and 1 and 4 form baselines 1, 2, 3, 4, 5 and 6 in sequence; based on the constraint function, determining a value range expression of the phase difference fuzzy progression corresponding to the base line 6; determining an expression of a signal incident angle based on a value range expression of the phase difference fuzzy progression corresponding to the base line 6; determining the phase difference fuzzy progression corresponding to the base lines 1, 2, 3, 4 and 5 based on the expression of the signal incidence angle-/>Is an expression of (2); solving the estimated value +.D. of the phase difference fuzzy progression corresponding to the base line 6 when the mean square error between the phase difference fuzzy progression corresponding to the base lines 1, 2, 3, 4 and 5 and the approximate integer of the phase difference fuzzy progression is minimum>The method comprises the steps of carrying out a first treatment on the surface of the Estimated value of phase difference blur level corresponding to base line 6 +.>Solving for the angle of incidence +.>Estimate of +.>The method comprises the steps of carrying out a first treatment on the surface of the For each group of baseline combinations, performing multiple simulation tests on the signal incident angles to obtain correct deblurring probability corresponding to each baseline combination>And direction finding error (rms)>The method comprises the steps of carrying out a first treatment on the surface of the Based on the corresponding correct disambiguation probability +.>Maximum set of baseline combinations and/or corresponding direction finding error (rms)/(x)>A minimum set of baseline combinations determines an optimal baseline length for the tri-baseline interferometer. Therefore, reasonable baseline configuration can be given under the condition that the total length of baselines of the three-baseline interferometer is fixed, so that the correct ambiguity resolution probability of the three-baseline interferometer is maximum and the direction finding error is minimum when the angle of incidence of signals is measured, and the three-baseline interferometer can achieve higher direction finding precision.
In one possible design, the constraint function is:
wherein,indicating the phase difference of the signal corresponding to the base line 1 formed by the base antenna array elements 1 and 2,/for the base line 1>Indicating the phase difference of the signal corresponding to the base line 2 formed by the base antenna array elements 2 and 3,/for the base line 2>Indicating the phase difference of the signal corresponding to the base line 3 formed by the base antenna array elements 3 and 4,/for the base line 3>Indicating the phase difference of the signals corresponding to the base line 4 formed by the base antenna array elements 1 and 3,/for the base line 4>Indicating the phase difference of the signals corresponding to the base line 5 formed by the base antenna elements 2 and 4,/for the base line>Indicating the phase difference of the signals corresponding to the base line 6 formed by the base antenna array elements 1 and 4,/for the base antenna array elements 1 and 4>Representing the angle of incidence of the signal +.>Indicates the phase difference blur level corresponding to baseline 1, +.>Indicates the phase difference blur level corresponding to baseline 2, +.>Indicates the phase difference blur level corresponding to baseline 3, +.>Indicates the phase difference blur level corresponding to baseline 4, +.>Indicating the phase difference blur level corresponding to baseline 5, +.>Represents the phase difference blur level corresponding to baseline 6, D represents the baseline total length of the three baseline interferometer,/->Representing signal wavelength, < >>The baseline length of baseline 1 is indicated,baseline length, denoted baseline 2,>the baseline length of baseline 3 is indicated.
In one possible design, the range of values of the phase difference blur level corresponding to the base line 6 is expressed as:
wherein,representing the maximum value of the angle of incidence of the signal, round () represents an approximate rounding.
In one possible design, the signal incident angle is expressed as
。
In one possible design, the baselines 1, 2, 3, 4, and 5 correspond to a phase difference blur level-/>The expression of (2) is:
。
in one possible design, the mean square error between the phase difference blur level corresponding to the base lines 1, 2, 3, 4, and 5 and the approximate integer of the phase difference blur level isWherein j->{/>，/>}，/>Represents the phase difference blur level corresponding to the base line j, +.>Representing an approximate rounding.
In one possible design, the estimate of the signal incident angle is expressed as:
。
in a second aspect, the present invention provides a three baseline interferometer baseline configuration apparatus, comprising:
the function construction unit is used for establishing constraint functions of signal phase differences and signal incidence angles corresponding to all baselines in the three-baseline interferometer, the three-baseline interferometer comprises antenna array elements 1, 2, 3 and 4, and the antenna array elements 1 and 2, 2 and 3, 3 and 4, 1 and 3, 2 and 4 and 1 and 4 sequentially form baselines 1, 2, 3, 4, 5 and 6;
the first determining unit is used for determining a value range expression of the phase difference fuzzy progression corresponding to the base line 6 based on the constraint function;
the second determining unit is used for determining an expression of the signal incident angle based on a value range expression of the phase difference fuzzy progression corresponding to the base line 6;
a third determining unit for determining the phase difference blur level corresponding to the base lines 1, 2, 3, 4 and 5 based on the expression of the signal incidence angle-/>Is an expression of (2);
a first operation unit for solving the estimated value of the phase difference blur level corresponding to the base line 6 when the mean square error between the phase difference blur level corresponding to the base lines 1, 2, 3, 4 and 5 and the approximate integer of the phase difference blur level is minimum；
A second operation unit for passing the estimated value of the phase difference fuzzy progression corresponding to the base line 6Solving for the angle of incidence +.>Estimate of +.>；
The simulation test unit is used for carrying out multiple simulation tests on the signal incident angles aiming at each group of baseline combinations to obtain correct ambiguity resolution probability corresponding to each baseline combinationAnd direction finding error (rms)>；
A fourth determination unit based on the corresponding correct disambiguation probabilityMaximum set of baseline combinations and/or corresponding direction finding error (rms)/(x)>A minimum set of baseline combinations determines an optimal baseline length for the tri-baseline interferometer.
In a third aspect, the present invention provides an electronic device comprising a memory, a processor and a transceiver in communication with each other in sequence, wherein the memory is configured to store a computer program, the transceiver is configured to send and receive messages, and the processor is configured to read the computer program and perform the three baseline interferometer baseline configuration method as described in the first aspect or any one of the possible designs of the first aspect.
In a fourth aspect, the present invention provides a computer readable storage medium having instructions stored thereon which, when executed on a computer, perform the three baseline interferometer baseline configuration method of the first aspect or any one of the possible designs of the first aspect.
In a fifth aspect, the invention provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the three baseline interferometer baseline configuration method as described in the first aspect or any one of the possible designs of the first aspect.
The beneficial effects are that:
the three-baseline interferometer baseline configuration method, the device, the electronic equipment and the storage medium provided by the invention can give out reasonable baseline configuration under the condition that the total length of the baselines of the three-baseline interferometer is fixed, so that the correct ambiguity resolution probability of the three-baseline interferometer is maximum and the direction finding error is minimum when the angle of incidence of signals is measured, thereby enabling the three-baseline interferometer to achieve higher direction finding precision and being convenient for practical application and popularization.
Drawings
FIG. 1 is a flow chart of a baseline configuration method for a three baseline interferometer provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a direction-finding antenna of a three-baseline interferometer provided in an embodiment of the present application;
FIG. 3 is a block diagram of a three baseline interferometer baseline configuration device according to an embodiment of the present application;
fig. 4 is a schematic block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the drawings is only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art. It should be noted that the description of these examples is for aiding in understanding the present invention, but is not intended to limit the present invention.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that for the term "and/or" that may appear herein, it is merely one association relationship that describes an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a alone, B alone, and both a and B; for the term "/and" that may appear herein, which is descriptive of another associative object relationship, it means that there may be two relationships, e.g., a/and B, it may be expressed that: a alone, a alone and B alone; in addition, for the character "/" that may appear herein, it is generally indicated that the context associated object is an "or" relationship.
In order to ensure the direction-finding precision of the three-baseline interferometer, the embodiment of the application provides a three-baseline interferometer baseline configuration method, a device, electronic equipment and a storage medium.
The method for configuring the baseline of the three-baseline interferometer provided in the embodiment of the present application will be described in detail below.
As shown in fig. 1, a flowchart of a three baseline interferometer baseline configuration method provided in the first aspect of the embodiments of the present application may include, but is not limited to, such steps S101-S105.
S101, establishing a constraint function of signal phase difference and signal incidence angle corresponding to each baseline in the three-baseline interferometer.
As shown in fig. 2, the tri-baseline interferometer includes antenna elements 1, 2, 3, and 4, the antenna elements 1 and 2, 2 and 3, 3 and 4, 1 and 3, 2 and 4, and 1 and 4 constituting baselines 1, 2, 3, 4, 5, and 6 in this order.
In this embodiment, the frequency of the signal received by the antenna element is known, that is, the frequency of the signal received by the antenna element is determined. The constraint function of the signal phase difference and the signal incident angle corresponding to each baseline in the three-baseline interferometer can be expressed as follows:
（1）
wherein,indicating the phase difference of the signal corresponding to the base line 1 formed by the base antenna array elements 1 and 2,/for the base line 1>Indicating the phase difference of the signal corresponding to the base line 2 formed by the base antenna array elements 2 and 3,/for the base line 2>Indicating the phase difference of the signal corresponding to the base line 3 formed by the base antenna array elements 3 and 4,/for the base line 3>Indicating the phase difference of the signals corresponding to the base line 4 formed by the base antenna array elements 1 and 3,/for the base line 4>Indicating the phase difference of the signals corresponding to the base line 5 formed by the base antenna elements 2 and 4,/for the base line>Indicating the phase difference of the signals corresponding to the base line 6 formed by the base antenna array elements 1 and 4,/for the base antenna array elements 1 and 4>Representing the angle of incidence of the signal +.>Indicates the phase difference blur level corresponding to baseline 1, +.>Indicates the phase difference blur level corresponding to baseline 2, +.>Indicates the phase difference blur level corresponding to baseline 3, +.>Indicates the phase difference blur level corresponding to baseline 4, +.>Indicating the phase difference blur level corresponding to baseline 5, +.>Represents the phase difference blur level corresponding to baseline 6, D represents the baseline total length of the three baseline interferometer,/->Representing signal wavelength, < >>The baseline length of baseline 1 is indicated,baseline length, denoted baseline 2,>the baseline length of baseline 3 is indicated.
In this embodiment, the frequency of the signal received by the antenna element may be a median value of the frequency range of the signal received by the antenna element or an average value of the frequencies of the received signals.
S102, determining a value range expression of the phase difference fuzzy progression corresponding to the base line 6 based on the constraint function.
、/>、/>、/>、/>And->All represent the phase difference of the signals received between the antenna array elements, the value range is +.>Between (I)>，j/>{/>，/>And the corresponding phase difference fuzzy progression. From formula (1)The expression of the phase difference blur level corresponding to the base line 6 can be deduced as follows:
（2）
assume thatθThe value of (C) is within [ ] range,/>]The range of the phase difference blur level corresponding to the base line 6 can be expressed as:
（3）
wherein,representing the maximum value of the angle of incidence of the signal, round () represents an approximate rounding.
S103, determining an expression of a signal incident angle based on a value range expression of the phase difference fuzzy progression corresponding to the base line 6.
Value range expression based on phase difference fuzzy progression corresponding to base line 6The signal incidence angle can be derived from equation (2) as:
（4）
s104, determining phase difference fuzzy progression corresponding to base lines 1, 2, 3, 4 and 5 based on the expression of the signal incidence angle-/>Is an expression of (2).
Since the longer the base line is, the higher the direction finding accuracy is, assuming that the longest base line D corresponds toAs a true value, substituting the formula (4) into the first five terms of the formula (1) can obtain the retardation blur level +_corresponding to the baselines 1, 2, 3, 4 and 5>（j/>{/>，/>Expression }) is:
（5）
step S105, solving phases corresponding to the baselines 1, 2, 3, 4 and 5When the mean square error between the bit-difference fuzzy progression and the approximate integer of the phase-difference fuzzy progression is minimum, the estimated value of the phase-difference fuzzy progression corresponding to the base line 6。
Mean square error between the phase difference blur level corresponding to base lines 1, 2, 3, 4 and 5 and the approximate integer of the phase difference blur levelCan be expressed as:
（6）
solving the mean square errorEstimated value of phase difference blur level corresponding to minimum time base line 6 +.>。
S106, estimating the phase difference fuzzy progression corresponding to the base line 6Solving for the angle of incidence +.>Estimate of +.>。
Wherein, the expression of the estimated value of the signal incident angle can be expressed as:
（7）
s107, performing multiple simulation tests on the signal incident angles aiming at each group of baseline combinations to obtain correct deblurring probability corresponding to each baseline combinationAnd direction finding error (rms)>。
The sum of the baseline lengths of baselines 1, 2, and 3 constitutes the baseline total length of the three baseline interferometer, baseline 1 baseline length is usedIndicating that the baseline length of baseline 2 is +.>Indicating that the baseline length of baseline 3 is +.>And (3) representing.
Determining a set of values to be calculated 、/>And->Of (1), e.g.)>{/>，/>}，/>{/>，}, and satisfy->，i/>{/>，/>-thereby determining->Group baseline combinations.
The simulation test can simulate the simulation at a certain fixed frequency, and the baseline combination of each group is%) Multiple simulations are performed for the same or different signal incidence angles, and the signal incidence angle estimation value of each simulation signal is recorded asWhereinnRepresenting the total number of simulations. And if the error between the signal incidence angle of the simulation signal and the signal incidence angle estimated value in the simulation process is smaller than a preset threshold value (such as 3 degrees), judging that the signal is correctly deblurred. Assuming that the number of times of correct defuzzification is q, the correct defuzzification probability can be expressed as +.>Direction finding error (rms)>Can be expressed as。
In the embodiment of the application, the angle of the incident angle of the signal during simulation is adjustable and the range of the angle is-45 degrees to 45 degrees.
S108, based on the corresponding correct ambiguity resolution probabilityAnd determining the optimal baseline length of the three-baseline interferometer by using the largest group of baseline combinations and/or the group of baseline combinations with the smallest corresponding direction finding errors.
In the embodiment of the application, the corresponding correct deblurring probabilityMaximum set of baseline combinations and corresponding direction finding error (rms)>The smallest set of baseline combinations may or may not be the same set of baseline combinations. If the same group of baseline combinations is adopted, the same group of baseline combinations can be directly adopted as the optimal baseline length combination of the three-baseline interferometer. If the baseline combination is not the same, one of the two baseline combinations may be considered the optimal baseline length combination for the three baseline interferometer.
In one or more embodiments, if the corresponding correct defuzzification probability isMaximum set of baseline combinations and corresponding direction finding error (rms)>The smallest set of baseline combinations is not the same set of baseline combinations. According to the two groups of baseline combinations, the corresponding correct solution ambiguity probability distribution and direction finding error distribution under different frequency sampling points in the signal frequency range can be counted, then the corresponding correct solution ambiguity probability distribution and direction finding error distribution under different frequency sampling points in the signal frequency range of the two groups of baseline combinations are compared, and the group of baseline combinations with the better corresponding correct solution ambiguity probability distribution (namely, the overall higher correct solution ambiguity probability) and the better corresponding direction finding error distribution (namely, the overall lower direction finding error) can be used as the optimal baseline length combination of the three-baseline interferometer.
For example, the signal frequency range is 92Ghz-97Ghz, so that the correct deblurring probability distribution and the direction finding error distribution corresponding to the two groups of baseline combinations at the frequency sampling points of 92Ghz, 93Ghz, 94Ghz, 95Ghz, 96Ghz and 97Ghz can be counted.
The invention provides a baseline configuration method of a three-baseline interferometer, which comprises the steps of establishing constraint functions of signal phase differences and signal incidence angles corresponding to baselines in the three-baseline interferometer, wherein the three-baseline interferometer comprises antenna array elements 1, 2, 3 and 4, antenna array elements 1 and 2, 2 and 3, 3 and 4, 1 and 3, 2 and 4 and 1 and 4 sequentially form baselines 1, 2, 3, 4, 5 and 6; based on the constraint function, solving the estimated value of the phase difference fuzzy series corresponding to the base line 6 when the mean square error between the phase difference fuzzy series corresponding to the base lines 1, 2, 3, 4 and 5 and the approximate integer of the phase difference fuzzy series is minimumThe method comprises the steps of carrying out a first treatment on the surface of the Estimated value of phase difference blur level corresponding to base line 6 +.>Solving for the angle of incidence +.>Estimate of +.>The method comprises the steps of carrying out a first treatment on the surface of the For each group of baseline combinations, performing multiple simulation tests on the signal incident angles to obtain correct deblurring probability corresponding to each baseline combination>And direction finding error (rms)>The method comprises the steps of carrying out a first treatment on the surface of the Based on the corresponding correct disambiguation probability +.>Maximum set of baseline combinations and/or corresponding direction finding error (rms)/(x)>Minimum set of baselinesCombining, determining the optimal baseline length of the three-baseline interferometer. Therefore, reasonable baseline configuration can be given under the condition that the total length of baselines of the three-baseline interferometer is fixed, so that the correct ambiguity resolution probability of the three-baseline interferometer is maximum and the direction finding error is minimum when the three-baseline interferometer measures the incident angle of signals, the three-baseline interferometer can achieve higher direction finding precision, and practical application and popularization are facilitated.
Referring to fig. 3, a second aspect of the embodiments of the present application provides a baseline configuration apparatus for a tri-baseline interferometer, the baseline configuration apparatus for a tri-baseline interferometer comprising:
the function construction unit is used for establishing constraint functions of signal phase differences and signal incidence angles corresponding to all baselines in the three-baseline interferometer, the three-baseline interferometer comprises antenna array elements 1, 2, 3 and 4, and the antenna array elements 1 and 2, 2 and 3, 3 and 4, 1 and 3, 2 and 4 and 1 and 4 sequentially form baselines 1, 2, 3, 4, 5 and 6;
the first determining unit is used for determining a value range expression of the phase difference fuzzy progression corresponding to the base line 6 based on the constraint function;
the second determining unit is used for determining an expression of the signal incident angle based on a value range expression of the phase difference fuzzy progression corresponding to the base line 6;
a third determining unit for determining the phase difference blur level corresponding to the base lines 1, 2, 3, 4 and 5 based on the expression of the signal incidence angle-/>Is an expression of (2);
a first operation unit for solving the estimated value of the phase difference blur level corresponding to the base line 6 when the mean square error between the phase difference blur level corresponding to the base lines 1, 2, 3, 4 and 5 and the approximate integer of the phase difference blur level is minimum；
A second arithmetic unit for passing through the base line 6Estimation value of corresponding phase difference fuzzy progressionSolving for the angle of incidence +.>Estimate of +.>；
The simulation test unit is used for carrying out multiple simulation tests on the signal incident angles aiming at each group of baseline combinations to obtain correct ambiguity resolution probability corresponding to each baseline combinationAnd direction finding error (rms)>；
A fourth determination unit based on the corresponding correct disambiguation probabilityMaximum set of baseline combinations and/or corresponding direction finding error (rms)/(x)>A minimum set of baseline combinations determines an optimal baseline length for the tri-baseline interferometer.
The working process, working details and technical effects of the baseline configuration device for a three-baseline interferometer provided in the second aspect of the present embodiment may be referred to in the first aspect of the embodiment, and are not repeated herein.
As shown in fig. 4, a third aspect of the embodiment of the present application provides an electronic device, including a memory, a processor, and a transceiver, which are sequentially communicatively connected, where the memory is configured to store a computer program, the transceiver is configured to send and receive a message, and the processor is configured to read the computer program, and perform the baseline configuration method of the three-baseline interferometer according to the first aspect of the embodiment.
The working process, working details and technical effects of the electronic device provided in the third aspect of the present embodiment may be referred to in the first aspect of the present embodiment, and are not described herein again.
By way of specific example, the Memory may include, but is not limited to, random Access Memory (RAM), read Only Memory (ROM), flash Memory (Flash Memory), first-in-first-out Memory (FIFO), and/or first-in-last-out Memory (FILO), etc.; the processor may not be limited to a processor adopting architecture such as a microprocessor, ARM (Advanced RISC Machines), X86, etc. of the model STM32F105 series or a processor integrating NPU (neural-network processing units); the transceiver may be, but is not limited to, a WiFi (wireless fidelity) wireless transceiver, a bluetooth wireless transceiver, a general packet radio service technology (General Packet Radio Service, GPRS) wireless transceiver, a ZigBee protocol (low power local area network protocol based on the ieee802.15.4 standard), a 3G transceiver, a 4G transceiver, and/or a 5G transceiver, etc.
A fourth aspect of the present embodiment provides a computer readable storage medium storing instructions comprising the method for configuring a baseline of a three-baseline interferometer according to the first aspect of the present embodiment, i.e. the computer readable storage medium has instructions stored thereon, which when run on a computer, perform the method for configuring a baseline of a three-baseline interferometer according to the first aspect. The computer readable storage medium refers to a carrier for storing data, and may include, but is not limited to, a floppy disk, an optical disk, a hard disk, a flash Memory, and/or a Memory Stick (Memory Stick), etc., where the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
The working process, working details and technical effects of the computer readable storage medium provided in the fourth aspect of the present embodiment may be referred to in the first aspect of the present embodiment, and are not described herein.
A fifth aspect of the present embodiment provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the three baseline interferometer baseline configuration method according to the first aspect of the embodiment, wherein the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus.
The working process, working details and technical effects of the computer program product provided in the fifth aspect of the present embodiment may be referred to in the first aspect of the present embodiment, and are not described herein.
It should be understood that specific details are provided in the following description to provide a thorough understanding of the example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, a system may be shown in block diagrams in order to avoid obscuring the examples with unnecessary detail. In other instances, well-known processes, structures, and techniques may be shown without unnecessary detail in order to avoid obscuring the example embodiments.
Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the invention and is not intended to limit the scope of the invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for configuring a baseline of a three-baseline interferometer, comprising:
establishing a constraint function of signal phase difference and signal incidence angle corresponding to each baseline in a three-baseline interferometer, wherein the three-baseline interferometer comprises antenna array elements 1, 2, 3 and 4, and the antenna array elements 1 and 2, 2 and 3, 3 and 4, 1 and 3, 2 and 4 and 1 and 4 sequentially form baselines 1, 2, 3, 4, 5 and 6;
based on the constraint function, determining a value range expression of the phase difference fuzzy progression corresponding to the base line 6;
determining an expression of a signal incident angle based on a value range expression of the phase difference fuzzy progression corresponding to the base line 6;
determining the phase difference fuzzy progression corresponding to the base lines 1, 2, 3, 4 and 5 based on the expression of the signal incidence angle-/>Is an expression of (2);
solving the estimated value of the phase difference fuzzy series corresponding to the base line 6 when the mean square error between the phase difference fuzzy series corresponding to the base lines 1, 2, 3, 4 and 5 and the approximate integer of the phase difference fuzzy series is minimum；
Estimated value of phase difference blur level corresponding to base line 6Solving for the angle of incidence +.>Estimate of +.>；
For each group of baseline combinations, performing multiple simulation tests on the signal incident angles to obtain the correct deblurring probability corresponding to each baseline combinationAnd direction finding error (rms)>；
Based on the corresponding correct de-blurring probabilityMaximum set of baseline combinations and/or corresponding direction finding error (rms)/(x)>A minimum set of baseline combinations determines an optimal baseline length for the tri-baseline interferometer.
2. Root of Chinese characterThe method of three baseline interferometer baseline configuration according to claim 1, wherein the constraint function is:
wherein,indicating the phase difference of the signal corresponding to the base line 1 formed by the base antenna array elements 1 and 2,/for the base line 1>Indicating the phase difference of the signal corresponding to the base line 2 formed by the base antenna array elements 2 and 3,/for the base line 2>Indicating the phase difference of the signal corresponding to the base line 3 formed by the base antenna array elements 3 and 4,/for the base line 3>Indicating the phase difference of the signals corresponding to the base line 4 formed by the base antenna array elements 1 and 3,/for the base line 4>Indicating the phase difference of the signals corresponding to the base line 5 formed by the base antenna elements 2 and 4,/for the base line>Indicating the phase difference of the signals corresponding to the base line 6 formed by the base antenna array elements 1 and 4,/for the base antenna array elements 1 and 4>Representing the angle of incidence of the signal +.>Indicates the phase difference blur level corresponding to baseline 1, +.>Indicates the phase difference blur level corresponding to baseline 2, +.>Indicates the phase difference blur level corresponding to baseline 3, +.>Indicates the phase difference blur level corresponding to baseline 4, +.>Indicating the phase difference blur level corresponding to baseline 5, +.>Represents the phase difference blur level corresponding to baseline 6, D represents the baseline total length of the three baseline interferometer,/->Representing signal wavelength, < >>Baseline length, denoted baseline 1,>baseline length, denoted baseline 2,>the baseline length of baseline 3 is indicated.
3. The three-baseline interferometer baseline configuration method according to claim 2, wherein the value range expression of the phase difference blur level corresponding to the baseline 6 is:
wherein,representation letterThe maximum value of the number incidence angle, round () represents an approximate rounding.
4. The method of three baseline interferometer baseline configuration according to claim 2, wherein the signal incident angle is expressed as
。
5. The method of three baseline interferometer baseline configuration according to claim 2, wherein the baselines 1, 2, 3, 4, and 5 correspond to a phase difference blur order-/>The expression of (2) is:
。
6. the method of three baseline interferometer baseline configuration according to claim 1, wherein the mean square error between the phase difference blur level and the approximate integer of the phase difference blur level corresponding to baselines 1, 2, 3, 4, and 5 isWherein j->{/>，/>}，/>Represents the phase difference blur level corresponding to the base line j, +.>Representing an approximate rounding.
7. The method of three baseline interferometer baseline configuration according to claim 2, wherein the expression of the estimated value of the signal incident angle is:
。
8. a three baseline interferometer baseline configuration device, comprising:
the function construction unit is used for establishing constraint functions of signal phase differences and signal incidence angles corresponding to all baselines in the three-baseline interferometer, the three-baseline interferometer comprises antenna array elements 1, 2, 3 and 4, and the antenna array elements 1 and 2, 2 and 3, 3 and 4, 1 and 3, 2 and 4 and 1 and 4 sequentially form baselines 1, 2, 3, 4, 5 and 6;
the first determining unit is used for determining a value range expression of the phase difference fuzzy progression corresponding to the base line 6 based on the constraint function;
the second determining unit is used for determining an expression of the signal incident angle based on a value range expression of the phase difference fuzzy progression corresponding to the base line 6;
a third determining unit for determining the phase difference blur level corresponding to the base lines 1, 2, 3, 4 and 5 based on the expression of the signal incidence angle-/>Is an expression of (2);
a first operation unit for solving the estimated value of the phase difference blur level corresponding to the base line 6 when the mean square error between the phase difference blur level corresponding to the base lines 1, 2, 3, 4 and 5 and the approximate integer of the phase difference blur level is minimum；
A second operation unit for passing the estimated value of the phase difference fuzzy progression corresponding to the base line 6Solving for the angle of incidence of the signalEstimate of +.>；
The simulation test unit is used for carrying out multiple simulation tests on the signal incident angles aiming at each group of baseline combinations to obtain correct ambiguity resolution probability corresponding to each baseline combinationAnd direction finding error (rms)>；
A fourth determination unit based on the corresponding correct disambiguation probabilityMaximum set of baseline combinations and/or corresponding direction finding error (rms)/(x)>A minimum set of baseline combinations determines an optimal baseline length for the tri-baseline interferometer.
9. An electronic device comprising a memory, a processor and a transceiver in communication with each other in sequence, wherein the memory is configured to store a computer program, the transceiver is configured to send and receive messages, and the processor is configured to read the computer program and perform the three baseline interferometer baseline configuration method of any one of claims 1-7.
10. A computer readable storage medium having instructions stored thereon which, when executed on a computer, perform the three baseline interferometer baseline configuration method of any one of claims 1 to 7.
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