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Broadband Array Mutual Coupling Error Correction System and Method Based on FIR Filter

A technology of mutual coupling error and correction system, which is applied in the direction of modulation carrier system, transmission system, digital transmission system, etc., can solve the problems of slow correction speed and low efficiency, achieve the improvement of correction speed, increase speed and efficiency, and reduce on-chip The effect of resource consumption

Active Publication Date: 2020-06-05
ROCKET FORCE UNIV OF ENG
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Problems solved by technology

[0005] The purpose of the present invention is to provide a wideband array mutual coupling error correction system based on FIR filter, in order to solve the problem of low correction speed and low efficiency of the mutual coupling error correction system and method in the prior art in practical application

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  • Broadband Array Mutual Coupling Error Correction System and Method Based on FIR Filter
  • Broadband Array Mutual Coupling Error Correction System and Method Based on FIR Filter
  • Broadband Array Mutual Coupling Error Correction System and Method Based on FIR Filter

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Embodiment 1

[0068] Such as figure 1 As shown, this embodiment discloses a wideband array mutual coupling error correction system based on an FIR filter, which is used to eliminate the mutual coupling error in the signal sequence to be corrected received by the wideband array.

[0069] In this embodiment, the idea of ​​correcting the signal sequence to be corrected is to first calculate the magnitude of the mutual coupling error of the broadband array for the broadband array, design the filter using the mutual coupling error as the parameter of the filter, and then use the designed filtering The device eliminates this part of the mutual coupling error.

[0070] Therefore, the system provided by the present invention includes a filter parameter obtaining module and a segmented FIR filter.

[0071] Wherein, the filter parameter obtaining module is used to obtain FIR filter parameters according to the broadband array, and the FIR filter parameters include filter order and filter sequence;

...

Embodiment 2

[0151] In this embodiment, the wideband array mutual coupling error correction system based on FIR filtering provided by the present invention is applied to FPGA based on Xilinx Zynq-7000 series XA7Z020CLG484.

[0152] In this embodiment, the signal sequence to be corrected is first divided into two paths and one of the signal sequences is delayed for 63 cycles. At this time, the corrected signal sequence and the delayed signal sequence are simultaneously segmented, and the length of each segment is 128 Points, perform Fourier transform respectively to obtain the corresponding frequency domain output; secondly, read the filter order stored in advance from the ROM, and compare the two frequency domain outputs with the frequency domain of the FIR filter stored in the ROM The data is multiplied (the output of the multiplier is also realized by flowing water); after the above two steps, after the inverse Fourier transform sub-module, only the last 63 points of the original output s...

Embodiment 3

[0159] A wideband array mutual coupling error correction method based on FIR filtering, used to correct the signal sequence of the broadband array includes eliminating the mutual coupling error in the signal sequence, performed according to the following steps:

[0160] Step 1. Obtain filtering parameters according to the broadband array, and the filtering parameters include a filtering order and a filtering sequence;

[0161] Optionally, step 1 specifically includes:

[0162] Step 1.1, transmitting narrowband signals covering all frequency points to the wideband array to obtain narrowband signals;

[0163] Step 1.2, using the narrowband mutual coupling error estimation algorithm to obtain the narrowband mutual coupling error matrix of the narrowband signal;

[0164] Step 1.3, according to the narrowband mutual coupling error matrix, obtain the narrowband mutual coupling error correction matrix;

[0165] Step 1.4. Obtain FIR filter parameters according to the narrow-band mut...

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Abstract

The invention discloses a broadband array mutual coupling error correction system and method based on an FIR filter. Due to the fact that traditional broadband mutual coupling error correction is difficult to achieve, an FIR filter is adopted as a correction filter to correct the mutual coupling error, the correction filter is achieved, and a broadband algorithm is achieved. In order to meet the requirement for broadband mutual coupling error correction, the FIR filter based on segmented convolution is designed, so that the operation speed of the correction method is higher, and the efficiencyis higher.

Description

technical field [0001] The invention relates to a wideband mutual coupling error correction system and method, in particular to a wideband array mutual coupling error correction system and method based on an FIR filter. Background technique [0002] Compared with the narrowband array, the mutual coupling error of the wideband array varies with the frequency of the received signal, which makes the correction of the wideband mutual coupling error much more difficult than that of the narrowband one. For digital arrays that receive broadband signals, due to the wide frequency band of the received signals, the electrical dimensions corresponding to the element spacing in the array no longer remain constant like narrowband arrays, but change with frequency. It can be seen that the mutual coupling effect between array elements varies with frequency. At this time, the array element spacing cannot match the mutual coupling effect of each frequency point. For arrays with element spa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H17/00H04L27/00
CPCH03H17/00H03H2017/0081H04L27/0014H04L2027/0026
Inventor 杨剑龚博文姚志成吴智慧卢建范志良王忠侯博
Owner ROCKET FORCE UNIV OF ENG
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