A Method of Analyzing the Influence of Coupling on Receiving Characteristics Based on Receiving Pattern Method
A receiving direction and coupling pair technology, applied in the field of signal processing, can solve the problems of anti-jamming null offset, HFSS cannot simulate receiving signals, and analog signals cannot be close to the actual array, etc.
Active Publication Date: 2020-09-18
NANJING UNIV OF SCI & TECH
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Problems solved by technology
[0006] (1) The method of simulating the generated signal with Matlab cannot well reflect the influence of coupling on the received signal, and the generated analog signal cannot be close to the actual array, and only ideal steering vectors can be used;
[0007] (2) HFSS cannot be used to simulate the receiving signal on the matching load, and it cannot be used to obtain the receiving pattern;
However, the use method involved in the prior art can only obtain the receiving signal of one incident angle, which makes it impossible to conveniently obtain the receiving signal of all incident angles at present;
[0009] (4) In the previous method, the calculated weight is multiplied by the ideal steering vector, and the conclusion that the coupling makes the anti-jamming null offset
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Embodiment 1
[0061] In order to capture the received signals from all angles from 0 to 90 degrees in pitch angle and from 0 to 360 degrees in azimuth angle, the simulation model is as follows figure 2 shown.
[0062] The model established in the simulation of this embodiment is a 4-circle array with a pitch of 80 mm. image 3 and Figure 4 Respectively, in the simulation without coupling and with coupling, the receiving pattern when the incoming signal is (50, 250). It can be seen that at the interference direction (50, 250), the receiving gain with coupling is larger than that without coupling.
[0063] A method for analyzing the influence of coupling on receiving characteristics based on the receiving pattern method, comprising the following steps:
[0064] Step 1, use FEKO software to establish a simulation array model, set the fixed phase difference between the parameters and the incident signal, simulate the model, and obtain several output files including snapshot signals, the ou...
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The invention provides a method for analyzing the influence of coupling on receiving characteristics based on a receiving pattern method. The method comprises the steps of: 1, building an emulation array model by using FEKO software, setting parameters and a fixed phase difference between incident signals, performing emulation on the model and acquiring a plurality of output files containing snapshot signals, wherein each output file contains received data and English description; 2, processing the received data in each output file by using Java programming to obtain files only containing received data; 3, applying an LCMV algorithm to the files in the second step to obtain the weights for null forming of all incident angles; 4, acquiring anti-interference receiving patterns at all the incident angles based on the weights; 5, analyzing the influence of coupling on anti-interference performance according to the anti-interference receiving patterns.
Description
technical field [0001] The invention relates to a signal processing technology, in particular to a method for analyzing the influence of coupling on receiving characteristics based on a receiving pattern method. Background technique [0002] The two main research directions of array signal processing are adaptive array processing and spatial spectrum estimation. To analyze these two directions, it is necessary to first analyze the receiving characteristics of the array. [0003] Numerical methods for electromagnetic calculations such as the method of moments (MOM), finite element method (FEM), and finite difference time domain (FDTD) can simulate the performance of antenna arrays well. However, due to the existence of coupling, the performance of the array in the transmitting mode cannot be directly equivalent to the performance of the receiving array. [0004] At present, in order to verify the performance of the manufactured antenna array in receiving mode, it is general...
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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 王昊李强徐文文权双龙王岩
Owner NANJING UNIV OF SCI & TECH