CN116819430A - Direction finding method for same-frequency signal under strong radiation source background - Google Patents

Direction finding method for same-frequency signal under strong radiation source background Download PDF

Info

Publication number
CN116819430A
CN116819430A CN202310787264.5A CN202310787264A CN116819430A CN 116819430 A CN116819430 A CN 116819430A CN 202310787264 A CN202310787264 A CN 202310787264A CN 116819430 A CN116819430 A CN 116819430A
Authority
CN
China
Prior art keywords
direction finding
radiation source
strong radiation
signal
determining
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202310787264.5A
Other languages
Chinese (zh)
Other versions
CN116819430B (en
Inventor
刘宁
张兴虎
万群
肖庆正
郑志东
常凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Electronic Science and Technology of China
Tongfang Industrial Co Ltd
Institute of Systems Engineering of PLA Academy of Military Sciences
Original Assignee
University of Electronic Science and Technology of China
Tongfang Industrial Co Ltd
Institute of Systems Engineering of PLA Academy of Military Sciences
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Electronic Science and Technology of China, Tongfang Industrial Co Ltd, Institute of Systems Engineering of PLA Academy of Military Sciences filed Critical University of Electronic Science and Technology of China
Priority to CN202310787264.5A priority Critical patent/CN116819430B/en
Publication of CN116819430A publication Critical patent/CN116819430A/en
Application granted granted Critical
Publication of CN116819430B publication Critical patent/CN116819430B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/14—Systems for determining direction or deviation from predetermined direction

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

The invention relates to a direction finding method of co-frequency signals under a strong radiation source background, and belongs to the technical field of radio direction finding. The invention uses the signal received by the antenna with the largest signal power as the template to process the correlation, and matches the correlation vector at the peak position of the synthesized correlation sequence with each direction vector in the direction vector set, and determines the direction corresponding to the maximum value in the matched value set as the interference source direction finding result at the peak position of the synthesized correlation sequence, thereby realizing the purpose of direction finding of the interference source under the co-location condition of the direction finding equipment and the strong radiation source.

Description

一种强辐射源背景下的同频信号的测向方法A direction finding method for co-frequency signals under the background of strong radiation sources

技术领域Technical field

本发明属于无线电测向技术领域，具体涉及一种强辐射源背景下的同频信号的测向方法。The invention belongs to the technical field of radio direction finding, and specifically relates to a direction finding method for co-frequency signals in the background of strong radiation sources.

背景技术Background technique

无线电频谱蕴含着巨大的经济价值、社会价值和国防军事价值，随着无线电作为广播、通信、雷达等装备的载体在信息传播、目标监测等方面所发挥的作用越来越重要，遇到有意或无意的无线电干扰的情况也越来越多，各种无线电干扰源对无线电通信、雷达等装备形成的威胁也越来越严重。The radio spectrum contains huge economic value, social value and national defense and military value. As radio plays an increasingly important role as a carrier of broadcasting, communications, radar and other equipment in information dissemination, target monitoring, etc., when encountering intentional or There are more and more cases of unintentional radio interference, and the threats posed by various radio interference sources to radio communications, radar and other equipment are becoming more and more serious.

目前，已有很多检测信号、确定信号来波方向的方法，包括干涉仪测向、常规波束形成测向、自适应波束形成测向、高分辨空间谱测向等方法。但是，在测向设备与强辐射源共址情况下，即测向设备在强辐射源附近工作时，检测干扰源辐射的信号、确定干扰源辐射的信号来波方向的测向设备一般只能工作在与共址强辐射源不同的时域、频域。当测向设备与共址强辐射源工作于相同的时域、频域时，由于受到远近效应的影响，测向设备接收到的远距离干扰源辐射的信号幅度远小于测向设备接收到的近距离共址强辐射的信号幅度，使得干涉仪、常规波束形成等检测信号、确定信号来波方向的方法只能检测到共址强辐射源的信号、确定共址强辐射源的信号来波方向，而难以检测干扰源辐射的信号、确定干扰源辐射的信号来波方向，限制了测向设备检测信号、确定信号来波方向的能力。为此，需要解决测向设备与强辐射源共址情况下测向设备与强辐射源工作于相同的时域、频域时的干扰源测向问题，以满足实时有效应对干扰源威胁、及时采取相应对抗措施的需求。At present, there are many methods for detecting signals and determining the direction of the signal, including interferometer direction finding, conventional beamforming direction finding, adaptive beamforming direction finding, and high-resolution spatial spectrum direction finding. However, when the direction finding equipment is co-located with a strong radiation source, that is, when the direction finding equipment is working near a strong radiation source, the direction finding equipment that detects the signal radiated by the interference source and determines the direction of the signal radiated by the interference source can generally only It works in a different time domain and frequency domain than the co-located strong radiation source. When the direction finding equipment and the co-located strong radiation source work in the same time domain and frequency domain, due to the influence of the near-far effect, the signal amplitude radiated by the long-distance interference source received by the direction finding equipment is much smaller than that of the near-distance interference source received by the direction finding equipment. The signal amplitude of the co-located strong radiation source makes the interferometer, conventional beamforming and other methods of detecting signals and determining the direction of the signal wave only detect the signal of the co-located strong radiation source and determine the wave direction of the signal from the co-located strong radiation source. , and it is difficult to detect the signal radiated by the interference source and determine the direction of the signal radiated by the interference source, which limits the ability of the direction finding equipment to detect the signal and determine the direction of the signal. To this end, it is necessary to solve the interference source direction finding problem when the direction finding equipment and the strong radiation source are co-located and work in the same time domain and frequency domain to meet the requirements of real-time and effective response to interference source threats and timely response. The need to take corresponding countermeasures.

发明内容Contents of the invention

(一)要解决的技术问题(1) Technical problems to be solved

本发明要解决的技术问题是如何提供一种强辐射源背景下的同频信号的测向方法，以解决针对测向设备与强辐射源共址情况下由于强辐射源信号远远强于干扰信号导致干扰源难以检测、难以测向的问题。The technical problem to be solved by the present invention is how to provide a direction finding method for co-frequency signals in the context of a strong radiation source, so as to solve the problem that the strong radiation source signal is far stronger than the interference when the direction finding equipment and the strong radiation source are co-located. The signal causes interference sources to be difficult to detect and direction find.

(二)技术方案(2) Technical solutions

为了解决上述技术问题，本发明提出一种强辐射源背景下的同频信号的测向方法，该方法包括以下步骤：In order to solve the above technical problems, the present invention proposes a direction finding method for co-frequency signals under the background of strong radiation sources. The method includes the following steps:

S1、设置组成测向设备圆阵列的喇叭天线个数、搜索的方向个数和搜索的方向集合，与搜索的方向集合一一对应的方向向量集合，按照采样周期采集信号的样本数，峰值位置集合的个数K；S1. Set the number of horn antennas that make up the circular array of the direction finding equipment, the number of search directions, the search direction set, the direction vector set that corresponds to the search direction set, the number of signal samples collected according to the sampling period, and the peak position The number of sets K;

S2、在测向设备与强辐射源共址情况下，采集测向设备所有天线接收的信号，确定每个天线接收的信号功率，从而确定信号功率最大的天线接收的信号；S2. When the direction finding equipment is co-located with a strong radiation source, collect the signals received by all antennas of the direction finding equipment, determine the signal power received by each antenna, and thereby determine the signal received by the antenna with the largest signal power;

S3、以信号功率最大的天线接收的信号为模板，确定所有天线接收的信号相关序列，进而确定合成相关序列，并确定合成相关序列除了最高峰之外的前K个最高的峰值位置；S3. Use the signal received by the antenna with the highest signal power as a template to determine the signal correlation sequences received by all antennas, then determine the synthetic correlation sequence, and determine the top K highest peak positions of the synthetic correlation sequence except the highest peak;

S4、由合成相关序列峰值位置，确定对应的相关向量，并与方向向量集合中的每个方向向量进行匹配，确定合成相关序列峰值位置处的匹配值，匹配值集合中的最大值对应的方向即为合成相关序列峰值位置处的干扰源测向结果，进而确定测向设备与强辐射源共址情况下的干扰源测向结果。S4. Determine the corresponding correlation vector based on the peak position of the synthetic correlation sequence, and match it with each direction vector in the direction vector set. Determine the matching value at the peak position of the synthetic correlation sequence, and the direction corresponding to the maximum value in the matching value set. That is, the direction finding result of the interference source at the peak position of the synthesized correlation sequence is used to determine the direction finding result of the interference source when the direction finding equipment and the strong radiation source are co-located.

(三)有益效果(3) Beneficial effects

本发明提出一种强辐射源背景下的同频信号的测向方法，本发明的有益效果是：使用本发明提出的一种强辐射源背景下的同频信号的测向方法，利用喇叭天线组成的测向设备圆阵列接收信号，可在强辐射源信号压制干扰源辐射的脉冲信号的情况下抑制强辐射源信号对非主瓣进入的喇叭天线接收的信号的影响，提高对干扰源的检测性能；以信号功率最大的喇叭天线接收的信号为模板进行相关处理，通过合成相关序列峰值位置处的相关向量与方向向量集合中的每个方向向量进行匹配，可获得被动匹配滤波处理的信噪比增益，提高对干扰源的测向性能。因此，本发明可用于测向设备与强辐射源共址情况下测向设备与强辐射源工作于相同的时域、频域时的干扰源测向，为实时有效应对干扰源威胁、及时采取相应对抗措施提供干扰源的检测、测向信息。The present invention proposes a direction finding method for same-frequency signals in the background of strong radiation sources. The beneficial effects of the present invention are: using the direction finding method of same-frequency signals in the background of strong radiation sources, using a horn antenna The circular array of direction finding equipment receives signals, which can suppress the influence of the strong radiation source signal on the signal received by the horn antenna entering the non-main lobe when the strong radiation source signal suppresses the pulse signal radiated by the interference source, and improves the detection of the interference source. Detection performance; use the signal received by the horn antenna with the largest signal power as a template for correlation processing, and match the correlation vector at the peak position of the correlation sequence with each direction vector in the direction vector set to obtain the signal processed by passive matching filtering. Noise ratio gain improves direction finding performance against interference sources. Therefore, the present invention can be used to find the direction of interference sources when the direction finding equipment and the strong radiation source are co-located. When the direction finding equipment and the strong radiation source work in the same time domain and frequency domain, it can effectively respond to the threat of interference sources in real time and take timely measures. Corresponding countermeasures provide detection and direction finding information of interference sources.

具体实施方式Detailed ways

为使本发明的目的、内容和优点更加清楚，下面结合实施例，对本发明的具体实施方式作进一步详细描述。In order to make the purpose, content and advantages of the present invention clearer, specific implementation modes of the present invention will be further described in detail below in conjunction with examples.

本发明针对测向设备与强辐射源共址情况下由于强辐射源信号远远强于干扰信号导致干扰源难以检测、难以测向的问题，利用喇叭天线组成的测向设备圆阵列接收信号，以信号功率最大的天线接收的信号为模板进行相关处理，通过合成相关序列峰值位置处的相关向量与方向向量集合中的每个方向向量进行匹配，确定匹配值集合中的最大值对应的方向即为合成相关序列峰值位置处的干扰源测向结果，实现测向设备与强辐射源共址情况下对干扰源测向的目的。This invention aims at the problem that when a direction finding device and a strong radiation source are co-located, the signal of the strong radiation source is much stronger than the interference signal, making it difficult to detect the interference source and find the direction. It uses a circular array of direction finding equipment composed of horn antennas to receive the signal. Correlation processing is performed using the signal received by the antenna with the largest signal power as a template, and the correlation vector at the peak position of the synthesized correlation sequence is matched with each direction vector in the direction vector set to determine the direction corresponding to the maximum value in the matching value set, that is, In order to synthesize the direction finding results of the interference source at the peak position of the correlation sequence, the purpose of finding the direction of the interference source is achieved when the direction finding equipment and the strong radiation source are co-located.

本发明的技术方案为：The technical solution of the present invention is:

一种强辐射源背景下的同频信号的测向方法，该方法包括：A direction finding method for co-frequency signals under the background of strong radiation sources. The method includes:

S1、设置组成测向设备圆阵列的喇叭天线个数、搜索的方向个数和搜索的方向集合，与搜索的方向集合一一对应的方向向量集合，按照采样周期采集信号的样本数，峰值位置集合的个数K；S1. Set the number of horn antennas that make up the circular array of the direction finding equipment, the number of search directions, the search direction set, the direction vector set that corresponds to the search direction set, the number of signal samples collected according to the sampling period, and the peak position The number of sets K;

S2、在测向设备与强辐射源共址情况下，采集测向设备所有天线接收的信号，确定每个天线接收的信号功率，从而确定信号功率最大的天线接收的信号；S2. When the direction finding equipment is co-located with a strong radiation source, collect the signals received by all antennas of the direction finding equipment, determine the signal power received by each antenna, and thereby determine the signal received by the antenna with the largest signal power;

S3、以信号功率最大的天线接收的信号为模板，确定所有天线接收的信号相关序列，进而确定合成相关序列，并确定合成相关序列除了最高峰之外的前K个最高的峰值位置；S3. Use the signal received by the antenna with the highest signal power as a template to determine the signal correlation sequences received by all antennas, then determine the synthetic correlation sequence, and determine the top K highest peak positions of the synthetic correlation sequence except the highest peak;

S4、由合成相关序列峰值位置，确定对应的相关向量，并与方向向量集合中的每个方向向量进行匹配，确定合成相关序列峰值位置处的匹配值，匹配值集合中的最大值对应的方向即为合成相关序列峰值位置处的干扰源测向结果，进而确定测向设备与强辐射源共址情况下的干扰源测向结果。S4. Determine the corresponding correlation vector based on the peak position of the synthetic correlation sequence, and match it with each direction vector in the direction vector set. Determine the matching value at the peak position of the synthetic correlation sequence, and the direction corresponding to the maximum value in the matching value set. That is, the direction finding result of the interference source at the peak position of the synthesized correlation sequence is used to determine the direction finding result of the interference source when the direction finding equipment and the strong radiation source are co-located.

本发明具体包括以下步骤：The present invention specifically includes the following steps:

S1、设置组成测向设备圆阵列的喇叭天线个数M、搜索的方向个数N、搜索的方向集合{θ1,θ2,…,θN}、与搜索的方向集合一一对应的方向向量组成的集合为{a(θ1),a(θ2),……,a(θN)}，按照采样周期采集信号的样本数L，峰值位置集合的个数K；S1. Set the number M of horn antennas that make up the circular array of the direction finding equipment, the number of search directions N, the search direction set {θ 1 , θ 2 ,..., θ N }, and the directions corresponding to the search direction set. The set of vectors is {a(θ 1 ), a(θ 2 ),..., a(θ N )}, the number of samples L of the signal collected according to the sampling period, and the number of peak position sets K;

S2、在测向设备与强辐射源共址情况下采集测向设备所有天线接收的信号，为M×L阶矩阵X，确定第m个天线接收的信号功率：S2. Collect the signals received by all antennas of the direction finding equipment when the direction finding equipment is co-located with a strong radiation source. It is an M×L order matrix X, and determine the signal power received by the mth antenna:

p(m)＝||X(m,1:L)||p(m)＝||X(m,1:L)||

其中，X(m,1:L)为矩阵X的第m行向量，||||为向量的范数，m＝1,2,…,M；从而确定信号功率最大的天线接收的信号为其中Among them, X(m,1:L) is the m-th row vector of matrix in

表示接收的信号的功率最大的天线序号；Indicates the antenna number with the highest power of the received signal;

S3、以信号功率最大的天线接收的信号为模板，确定第m个天线接收的信号的相关序列，为：S3. Signal received by the antenna with the highest signal power As a template, determine the correlation sequence of the signal received by the m-th antenna, as:

其中，FFT和IFFT为快速傅里叶变换和快速傅里叶逆变换，()*为共轭，⊙表示对应元素相乘，m＝1,2,…,M；进而确定合成相关序列，为Among them, FFT and IFFT are the fast Fourier transform and the inverse fast Fourier transform, () * is the conjugate, ⊙ represents the multiplication of the corresponding elements, m=1,2,...,M; and then determine the synthetic correlation sequence, as

并确定合成相关序列h(1:L)除了最高峰之外的前K个最高的峰值位置t1,t2,…,tK；And determine the top K highest peak positions t 1 , t 2 ,...,t K of the synthetic correlation sequence h(1:L) except the highest peak;

S4、由合成相关序列峰值位置tk，k＝1,2,…,K，确定对应的相关向量为q(1:M,tk)，与方向向量集合中的每个方向向量a(θn)，n＝1,2,…,N，进行匹配，确定合成相关序列峰值位置tk处的匹配值为S4. Based on the peak position t k of the synthetic correlation sequence, k=1,2,...,K, determine the corresponding correlation vector as q(1:M,t k ), which is the same as each direction vector a(θ in the direction vector set n ), n=1,2,...,N, perform matching, and determine the matching value at the peak position t k of the synthetic correlation sequence as

g(θn,tk)＝|q(1:M,tk)a(θn)|g(θ n ,t k )=|q(1:M,t k )a(θ n )|

其中，||为绝对值；Among them, || is the absolute value;

匹配值集合{gm(θ1,tk),g(θ2,tk),…,g(θN,tk)}中的最大值对应的方向即为合成相关序列峰值位置tk处的测向结果，记为进而确定测向设备与强辐射源共址情况下的干扰源测向结果为/> The direction corresponding to the maximum value in the matching value set {g m (θ 1 ,t k ),g (θ 2 ,t k ),...,g(θ N ,t k )} is the peak position t k of the synthetic correlation sequence The direction finding result at is recorded as Then it is determined that the direction finding result of the interference source when the direction finding equipment and the strong radiation source are co-located is/>

实施例1：Example 1:

下面结合实施例对本发明的实用性进行分析。The practicality of the present invention will be analyzed below with reference to the examples.

实施例：在本例中，设置组成测向设备圆阵列的喇叭天线个数M＝8、搜索的方向个数N＝360和搜索的方向集合{0,1,…,359}度、与搜索的方向集合一一对应的方向向量组成的集合为{a(0),a(1),……,a(359)}，按照采样周期采集信号的样本数L＝256，峰值位置集合的个数K＝2；在测向设备与强辐射源共址情况下，相对于测向设备，强辐射源信号的来波方向为180度，信噪比为26dB；干扰源辐射的脉冲信号的来波方向为90度，信噪比为0dB；可见，信号到达测向设备时，强辐射源信号比干扰源辐射的脉冲信号功率强26dB。强辐射源信号为线性调频信号，带宽5MHz，脉冲宽度10us；干扰源辐射的脉冲信号也是线性调频信号，带宽5MHz，脉冲宽度10us；干扰源辐射的脉冲信号在频域上与强辐射源信号完全重叠，在时域上与强辐射源信号有1/4重叠。Example: In this example, the number of horn antennas that make up the circular array of the direction finding equipment is set to M = 8, the number of search directions N = 360, and the search direction set {0, 1,..., 359} degrees, and search The set of direction vectors corresponding to the one-to-one direction set is {a(0), a(1),...,a(359)}. The number of samples of the signal collected according to the sampling period is L = 256. The number of peak position sets is Number K = 2; when the direction finding equipment and the strong radiation source are co-located, the direction of the strong radiation source signal is 180 degrees relative to the direction finding equipment, and the signal-to-noise ratio is 26dB; the origin of the pulse signal radiated by the interference source is The wave direction is 90 degrees and the signal-to-noise ratio is 0dB. It can be seen that when the signal reaches the direction finding device, the signal from the strong radiation source is 26dB stronger than the pulse signal radiated by the interference source. The signal from the strong radiation source is a linear frequency modulation signal with a bandwidth of 5MHz and a pulse width of 10us; the pulse signal radiated by the interference source is also a linear frequency modulation signal with a bandwidth of 5MHz and a pulse width of 10us; the pulse signal radiated by the interference source is completely consistent with the signal from the strong radiation source in the frequency domain. Overlap, there is 1/4 overlap with the strong radiation source signal in the time domain.

在测向设备与强辐射源共址情况下采集测向设备所有天线接收的信号，为8×256阶矩阵，利用干涉仪测向、常规波束形成测向、自适应波束形成测向、高分辨空间谱测向等检测信号、确定信号来波方向的方法只能检测到共址强辐射源信号、确定共址强辐射信号来波方向为180度，难以检测干扰源辐射的信号、确定干扰源辐射的信号来波方向；采用本发明方法，可检测到干扰源辐射的信号、确定干扰源辐射的信号来波方向为90度，实现了测向设备与强辐射源共址情况下对干扰源测向的目的。When the direction finding equipment is co-located with a strong radiation source, the signals received by all antennas of the direction finding equipment are collected, which is an 8×256 order matrix. Interferometer direction finding, conventional beam forming direction finding, adaptive beam forming direction finding, and high resolution are used. Methods such as spatial spectrum direction finding and other methods for detecting signals and determining the direction of the signal can only detect signals from co-located strong radiation sources and determine the direction of the co-located strong radiation signals to be 180 degrees. It is difficult to detect signals radiated by interference sources and determine the source of interference. The incoming direction of the radiated signal; using the method of the present invention, the signal radiated by the interference source can be detected, the incoming direction of the signal radiated by the interference source is determined to be 90 degrees, and the interference source can be detected when the direction finding equipment and the strong radiation source are co-located. direction finding purpose.

本发明的有益效果是：使用本发明提出的一种强辐射源背景下的同频信号的测向方法，利用喇叭天线组成的测向设备圆阵列接收信号，可在强辐射源信号压制干扰源辐射的脉冲信号的情况下抑制强辐射源信号对非主瓣进入的喇叭天线接收的信号的影响，提高对干扰源的检测性能；以信号功率最大的喇叭天线接收的信号为模板进行相关处理，通过合成相关序列峰值位置处的相关向量与方向向量集合中的每个方向向量进行匹配，可获得被动匹配滤波处理的信噪比增益，提高对干扰源的测向性能。因此，本发明可用于测向设备与强辐射源共址情况下测向设备与强辐射源工作于相同的时域、频域时的干扰源测向，为实时有效应对干扰源威胁、及时采取相应对抗措施提供干扰源的检测、测向信息。The beneficial effects of the present invention are: using the direction finding method for co-frequency signals in the context of strong radiation sources proposed by the present invention, and using a circular array of direction finding equipment composed of horn antennas to receive signals, interference sources can be suppressed when strong radiation source signals are used In the case of radiated pulse signals, the impact of strong radiation source signals on the signals received by the horn antenna entering the non-main lobe is suppressed, and the detection performance of the interference source is improved; the signal received by the horn antenna with the largest signal power is used as a template for relevant processing. By matching the correlation vector at the peak position of the synthesized correlation sequence with each direction vector in the direction vector set, the signal-to-noise ratio gain of passive matching filtering can be obtained and the direction finding performance for interference sources can be improved. Therefore, the present invention can be used to find the direction of interference sources when the direction finding equipment and the strong radiation source are co-located. When the direction finding equipment and the strong radiation source work in the same time domain and frequency domain, it can effectively respond to the threat of interference sources in real time and take timely measures. Corresponding countermeasures provide detection and direction finding information of interference sources.

以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和变形，这些改进和变形也应视为本发明的保护范围。The above are only preferred embodiments of the present invention. It should be noted that those of ordinary skill in the art can also make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A method for direction finding of co-frequency signals in a strong radiation source background, the method comprising the steps of:
s1, setting the number of horn antennas, the number of searched directions and the number of searched directions, wherein the number of the horn antennas, the number of the searched directions and the number of the direction vectors are set, the number of samples of signals and the number of peak position sets are acquired according to a sampling period, wherein the number of the horn antennas, the number of the searched directions and the number of the searched directions are set, and the direction vectors correspond to the searched direction sets one by one;
s2, under the condition that the direction-finding equipment and the strong radiation source are co-located, collecting signals received by all antennas of the direction-finding equipment, and determining the signal power received by each antenna, thereby determining the signal received by the antenna with the largest signal power;
s3, determining signal correlation sequences received by all antennas by taking signals received by the antenna with the largest signal power as a template, further determining a synthesized correlation sequence, and determining the top K highest peak positions except the highest peak of the synthesized correlation sequence;
s4, determining corresponding correlation vectors according to peak positions of the synthesized correlation sequences, matching the correlation vectors with each direction vector in a direction vector set, determining matching values at the peak positions of the synthesized correlation sequences, wherein the direction corresponding to the maximum value in the matching value set is an interference source direction finding result at the peak positions of the synthesized correlation sequences, and further determining the interference source direction finding result under the condition that the direction finding equipment and the strong radiation source are co-located.
2. The method for direction finding of co-frequency signals in the background of a strong radiation source according to claim 1, wherein said step S1 specifically comprises: setting the number M of horn antennas forming a circular array of the direction finding equipment, the number N of searched directions and the set { theta ] of the searched directions 1 ,θ 2 ,…,θ N A set of direction vectors corresponding to the searched direction set one by one is { a (θ) 1 ),a(θ 2 ),……,a(θ N ) And acquiring the number K of peak position sets according to the number L of samples of the signal in the sampling period.
3. The method for direction finding of co-frequency signals in the context of a strong radiation source according to claim 2, wherein the number of horn antennas constituting the circular array of direction finding devices M = 8.
4. The method for direction finding of co-frequency signals in a strong radiation source background according to claim 2, wherein the number of directions searched is n=360, and the set of directions searched is {0,1, …,359} degrees.
5. The method of claim 4, wherein the set of directional vectors corresponding to the set of directions searched for is { a (0), a (1), … …, a (359) }.
6. The method for direction finding of co-frequency signals in a strong radiation source background according to claim 2, wherein the number of samples of the signal L = 256 is acquired according to a sampling period.
7. The method for direction finding of co-frequency signals in a strong radiation source background according to claim 2, wherein the number of peak position sets K = 2.
8. The method for direction finding of co-frequency signals in the context of a strong radiation source according to any one of claims 1 to 7, wherein said step S2 comprises:
under the condition that the direction-finding equipment and the strong radiation source are co-located, signals received by all antennas of the direction-finding equipment are collected, the signals are M multiplied by L order matrix X, and the power of the signals received by the mth antenna is determined:
p(m)＝||X(m,1:L)||
wherein X (M, 1:L) is the M-th row vector of matrix X, i is the norm of the vector, m=1, 2, …, M; thereby determining the signal received by the antenna with the largest signal power asWherein the method comprises the steps of
The antenna number indicating the maximum power of the received signal.
9. The method for direction finding of co-frequency signals in the background of strong radiation source according to claim 8, wherein said step S3 specifically comprises:
signals received by antennas with maximum signal powerAs a template, determining a correlation sequence of a signal received by an mth antenna, which is:
wherein the FFT and IFFT are fast Fourier transform and inverse fast Fourier transform, () * For conjugation, as would be the case if the corresponding elements were multiplied by one another, m=1, 2, …, M; further determining the synthesis related sequence as
And determining the top K highest peak positions t of the synthesized correlation sequence h (1:L) except for the highest peak 1 ,t 2 ,…,t K 。
10. The method for direction finding of co-frequency signals in the background of strong radiation source according to claim 9, wherein said step S4 specifically comprises:
from the peak position t of the synthesized correlation sequence k K=1, 2, …, K, and the corresponding correlation vector is determined to be q (1:m, t k ) And each direction vector a (θ n ) N=1, 2, …, N, and determining the peak position t of the synthesized correlation sequence k The matching value at is
g(θ n ,t k )＝|q(1:M,t k )a(θ n )|
Wherein || is an absolute value;
matching value set { g (θ) 1 ,t k ),g(θ 2 ,t k ),…,g(θ N ,t k ) The direction corresponding to the maximum value in the sequence is the peak value position t of the synthesized correlation sequence k The direction finding result at the position is recorded asFurther determining that the interference source direction finding result under the condition that the direction finding device and the strong radiation source are co-located is +.>
CN202310787264.5A 2023-06-30 2023-06-30 Direction finding method for same-frequency signal under strong radiation source background Active CN116819430B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310787264.5A CN116819430B (en) 2023-06-30 2023-06-30 Direction finding method for same-frequency signal under strong radiation source background

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310787264.5A CN116819430B (en) 2023-06-30 2023-06-30 Direction finding method for same-frequency signal under strong radiation source background

Publications (2)

Publication Number Publication Date
CN116819430A true CN116819430A (en) 2023-09-29
CN116819430B CN116819430B (en) 2024-03-15

Family

ID=88114199

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310787264.5A Active CN116819430B (en) 2023-06-30 2023-06-30 Direction finding method for same-frequency signal under strong radiation source background

Country Status (1)

Country Link
CN (1) CN116819430B (en)

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040001554A1 (en) * 2002-03-14 2004-01-01 Kabushiki Kaisha Toshiba Antenna signal processing systems
JP2004125671A (en) * 2002-10-03 2004-04-22 Ntt Docomo Inc Electric wave incoming direction estimation method
US20060133211A1 (en) * 2004-12-17 2006-06-22 Yang Tsih C Method and apparatus for acoustic source tracking using a horizontal line array
US20070293150A1 (en) * 2004-06-18 2007-12-20 Toyon Research Corporation Compact antenna system for polarization sensitive null steering and direction-finding
CN103293518A (en) * 2013-05-29 2013-09-11 电子科技大学 Positioning and detection method of radiation source outside broadcast signals
US20150204966A1 (en) * 2013-06-13 2015-07-23 Panasonic Corporation Radar apparatus
WO2018130037A1 (en) * 2017-01-11 2018-07-19 中兴通讯股份有限公司 Detection method and apparatus for identifying false detection caused by interference, and base station
CN108710103A (en) * 2018-06-12 2018-10-26 西安电子科技大学 Strong and weak multiple target super-resolution direction finding based on thinned array and Sources number estimation method
RU2711432C1 (en) * 2018-11-06 2020-01-17 Акционерное Общество "Концерн "Океанприбор" Method of passive determination of coordinates of hydroacoustic radiation sources
CN110837074A (en) * 2019-11-13 2020-02-25 电子科技大学 A Direction Finding Method for Phase Interferometer with Multiple Co-frequency Sources Based on Digital Beamforming
RU2019141342A (en) * 2019-12-11 2021-06-11 Федеральное государственное бюджетное учреждение "4 Центральный научно-исследовательский институт" Министерства обороны Российской Федерации METHOD FOR INCREASING IMMUNITY OF SYNCHRONIZATION SIGNALS
CN113419219A (en) * 2021-06-18 2021-09-21 桂林电子科技大学 Outer radiation source radar same frequency interference cascade cancellation method based on spatial domain feature cognition
CN114415210A (en) * 2021-12-25 2022-04-29 西北工业大学 A direct positioning method of satellite navigation deceptive interference source based on multi-dimensional information
CN114994597A (en) * 2022-05-26 2022-09-02 电子科技大学 Interferometer direction finding method based on uniform circular array
CN115267660A (en) * 2022-07-15 2022-11-01 北京航天控制仪器研究所 Underwater narrowband signal anti-interference orientation and automatic ambiguity resolution method
CN115882881A (en) * 2022-10-11 2023-03-31 西安宇飞电子技术有限公司 Initial angle searching method and terminal of array antenna time division system under strong interference
CN116047488A (en) * 2022-11-22 2023-05-02 中国船舶重工集团公司第七一五研究所 Active sonar interference suppression method for pressed interference source
CN116156631A (en) * 2023-01-09 2023-05-23 中国人民解放军军事科学院系统工程研究院 Self-adaptive distribution method for satellite communication multi-beam interference power

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040001554A1 (en) * 2002-03-14 2004-01-01 Kabushiki Kaisha Toshiba Antenna signal processing systems
JP2004125671A (en) * 2002-10-03 2004-04-22 Ntt Docomo Inc Electric wave incoming direction estimation method
US20070293150A1 (en) * 2004-06-18 2007-12-20 Toyon Research Corporation Compact antenna system for polarization sensitive null steering and direction-finding
US20060133211A1 (en) * 2004-12-17 2006-06-22 Yang Tsih C Method and apparatus for acoustic source tracking using a horizontal line array
CN103293518A (en) * 2013-05-29 2013-09-11 电子科技大学 Positioning and detection method of radiation source outside broadcast signals
US20150204966A1 (en) * 2013-06-13 2015-07-23 Panasonic Corporation Radar apparatus
WO2018130037A1 (en) * 2017-01-11 2018-07-19 中兴通讯股份有限公司 Detection method and apparatus for identifying false detection caused by interference, and base station
CN108710103A (en) * 2018-06-12 2018-10-26 西安电子科技大学 Strong and weak multiple target super-resolution direction finding based on thinned array and Sources number estimation method
RU2711432C1 (en) * 2018-11-06 2020-01-17 Акционерное Общество "Концерн "Океанприбор" Method of passive determination of coordinates of hydroacoustic radiation sources
CN110837074A (en) * 2019-11-13 2020-02-25 电子科技大学 A Direction Finding Method for Phase Interferometer with Multiple Co-frequency Sources Based on Digital Beamforming
RU2019141342A (en) * 2019-12-11 2021-06-11 Федеральное государственное бюджетное учреждение "4 Центральный научно-исследовательский институт" Министерства обороны Российской Федерации METHOD FOR INCREASING IMMUNITY OF SYNCHRONIZATION SIGNALS
CN113419219A (en) * 2021-06-18 2021-09-21 桂林电子科技大学 Outer radiation source radar same frequency interference cascade cancellation method based on spatial domain feature cognition
CN114415210A (en) * 2021-12-25 2022-04-29 西北工业大学 A direct positioning method of satellite navigation deceptive interference source based on multi-dimensional information
CN114994597A (en) * 2022-05-26 2022-09-02 电子科技大学 Interferometer direction finding method based on uniform circular array
CN115267660A (en) * 2022-07-15 2022-11-01 北京航天控制仪器研究所 Underwater narrowband signal anti-interference orientation and automatic ambiguity resolution method
CN115882881A (en) * 2022-10-11 2023-03-31 西安宇飞电子技术有限公司 Initial angle searching method and terminal of array antenna time division system under strong interference
CN116047488A (en) * 2022-11-22 2023-05-02 中国船舶重工集团公司第七一五研究所 Active sonar interference suppression method for pressed interference source
CN116156631A (en) * 2023-01-09 2023-05-23 中国人民解放军军事科学院系统工程研究院 Self-adaptive distribution method for satellite communication multi-beam interference power

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
RAN WU, ET AL: "DOA estimation for beam scanning radar based on sparse signal reconstruction with incomplete pulse", 2022 IEEE INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING *
夏宇垠等: "一种干扰源定位虚假点排除的新方法", 航天电子对抗, vol. 34, no. 4 *
王;张剑云;郑志东;: "有源干扰条件下机载MIMO雷达降维STAP方法", 现代雷达, no. 08 *
陈长征, 王华力, 甘仲民: "星载多波束天线干扰源定位与自适应调零技术研究", 无线通信技术, no. 04 *

Also Published As

Publication number Publication date
CN116819430B (en) 2024-03-15

Similar Documents

Publication Publication Date Title
CN110412568B (en) Distance fuzzy clutter suppression method based on extended azimuth phase coding
CN110133631B (en) Fuzzy function-based frequency control array MIMO radar target positioning method
CN111830482B (en) FDA radar target positioning method based on agile OFDM
CN110346752B (en) Fuzzy-free direction finding method based on coprime sparse matrix
CN110531311A (en) A kind of LTE external illuminators-based radar DOA estimation method based on matrix recombination
CN112748407B (en) Space domain-polarization domain joint spectrum estimation method based on polarization sensitive area array
CN110618399A (en) Space-based radar electromagnetic spectrum environment cognitive system and interference countermeasure method
CN104267383A (en) Self-adaptive measuring device for polarization parameter of radar electromagnetic signal
Moscardini et al. Spatial adaptive processing for passive bistatic radar
CN103558584A (en) Method and device for detecting direction of arrival
CN109917329A (en) A method for estimation of direction of arrival of L-shaped array based on covariance matching criterion
CN113238192B (en) Four-channel Main Lobe Interference Suppression Angle Measurement Method Based on Feature Projection Preprocessing
CN112462363B (en) Non-uniform sparse polarization array coherent target parameter estimation method
CN112363108A (en) Signal subspace weighted super-resolution direction-of-arrival detection method and system
CN116819430B (en) Direction finding method for same-frequency signal under strong radiation source background
CN113419219B (en) Cascade Cancellation Method for Co-channel Interference of External Radiator Radar Based on Airspace Characteristic Cognition
CN112327305B (en) Rapid frequency domain broadband MVDR sonar wave beam forming method
CN118112493A (en) Oblique projection DOA estimation method based on antenna airspace polarization information
CN107728132B (en) A Method of Improving the Output Signal-to-Noise Ratio of Interference Blocking Algorithm
Yong et al. Echo DOA based high-resolution target location
CN110907888A (en) Rapid polarization-DOA estimation method based on beam forming
CN116068498A (en) Multi-interference-source suppression method based on main and auxiliary lobe airspace polarization characteristics
Guibao et al. Mutual coupling calibration for electromagnetic vector sensor array
Bo et al. Beamforming analysis based on CSB sin-FDA
Liu et al. Compressive sensing based direction-of-arrival estimation in MIMO radars in presence of strong jamming via blocking matrix

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant