Method for synthesizing single-point array response control directional diagram with minimum error
A pattern synthesis and pattern technology, which is applied in the field of radar antennas, can solve the problems of inability to control the main lobe area, inability to accurately achieve the expected value of pattern response, and achieve the effect of avoiding pattern distortion, achieving precise control, and rapid synthesis.
Inactive Publication Date: 2021-06-29
XIDIAN UNIV
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However, since the relaxed problem is different from the original problem, the positive semi-definite relaxation can only give an approximate solution
[0005] Using the adaptive array theory to control the pattern, this kind of method minimizes the difference with the expected pattern response by imposing virtual interference on the pattern. Although this kind of method can achieve the effects of widening the zero point and reducing the side lobe, it cannot The main lobe area is controlled, and the power of the virtual interference is selected empirically, which cannot accurately achieve the expected value of the pattern response
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[0056] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0057] Refer to attached figure 1 , a minimum error single-point array response control pattern synthesis method proposed by the present invention, specifically includes the following steps:
[0058] Step 1, initialization:
[0059] (1.1) The preset angle is the azimuth angle θ of the desired signal 0 , and set the initial weight vector w 0 and this vector with respect to θ 0 The normalized pattern response of the direction L 0 (θ):
[0060] w 0 =a(θ 0 ),
[0061]
[0062] Among them, a(θ 0 ) represents the steering vector of the desired signal, and H represents the conjugate transpose;
[0063] (1.2) Record the number of iterations as k, and set the iteration termination condition as follows:
[0064] |20log 10 (L d (θ))-20log 10 (L k (θ))|≤0.5
[0065] Among them, L d (θ) represents the desired pattern, L k (θ) ...
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The invention discloses a method for synthesizing a single-point array response control directional diagram with a minimum error. The method mainly solves the technical problem that an existing single-point array directional diagram cannot be flexibly controlled. The scheme comprises the following steps: 1) initializing and starting an iteration process; 2) selecting a to-be-controlled angle; 2) obtaining a closed-form solution of phase response by minimizing an array error; 3) obtaining an updating form of a weight vector; 4) obtaining a directional diagram of the array corresponding to the weight vector; 5) judging whether the obtained directional diagram meets the requirements of an expected directional diagram, and if so, outputting the directional diagram; otherwise, continuing iteration, and readjusting the weight vector to synthesize the directional diagram. According to the method, the array error is minimized, and an accurate calculation form of the virtual interference power is obtained, so that the flexible control of the directional diagram is realized, the distortion phenomenon of the directional diagram is effectively avoided, the flexibility of the directional diagram is remarkably improved, and the accurate control of the level of the single-point directional diagram is realized.
Description
technical field [0001] The invention belongs to the technical field of radar antennas, and specifically relates to a minimum error single-point array response control (Single-Point Array Response Control-Minimum Deviation, SPARC-MD) pattern synthesis method. Can be used for flexible, robust, fast, pattern design of antenna arrays that meet specific hardware requirements. Background technique [0002] With the increasing complexity of the electromagnetic environment, in order to meet the requirements for the shape of the pattern in practical applications, the pattern synthesis technology, that is, beamforming, is widely used in array beamforming, such as radar anti-jamming, which needs to be in a specific position Form deep nulls to achieve effective interference suppression. In remote sensing, it is necessary to broaden the main lobe of the pattern to increase the range of target detection. The pattern synthesis technology meets the requirements of the expected response of ...
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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 兰岚吕微慧廖桂生朱圣棋许京伟邓敬亚
Owner XIDIAN UNIV