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Sum-difference tracking angle measurement method capable of resisting main and side lobe interference and based on block parallel SMI algorithm

A main and side lobe, angle measurement technology, applied in the field of signal processing, can solve performance interference, influence, failure and other problems, achieve the effect of good angle measurement accuracy, reduce the amount of calculation, and improve the angle measurement accuracy

Pending Publication Date: 2020-08-14
XIDIAN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the face of interference, especially when the interference is within the main lobe, the conventional sum-difference tracking angle measurement or the adaptive anti-interference weight obtained by the conventional SMI algorithm is used for the sum-difference angle measurement, and the performance will be seriously affected by the interference. even failure

Method used

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  • Sum-difference tracking angle measurement method capable of resisting main and side lobe interference and based on block parallel SMI algorithm
  • Sum-difference tracking angle measurement method capable of resisting main and side lobe interference and based on block parallel SMI algorithm
  • Sum-difference tracking angle measurement method capable of resisting main and side lobe interference and based on block parallel SMI algorithm

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Embodiment 1

[0051] See figure 1 , figure 1 It is a schematic flow chart of a sum-difference tracking angle measurement method based on block parallel SMI algorithm against main and side lobe interference provided by an embodiment of the present invention, including:

[0052] Step 1: Obtain the received data of the array, and use the block parallel SMI algorithm to process to obtain the full array adaptive anti-jamming weight.

[0053] In this embodiment, the phased array radar obtains the data received by the array, combines with the estimated angle of the target, and uses a block parallel SMI algorithm to obtain an adaptive anti-jamming weight.

[0054] Further, step 1 includes:

[0055] (1a) Blocking the received data to obtain several sub-data blocks;

[0056]Specifically, for the received data x(t), t=1, 2,...,L, the number of array elements is N, L is the number of snapshots, the size of the received data is N×L, and the uniform block method is used to The received data x(t) is d...

Embodiment 2

[0104] The effects of the present invention will be further described through simulation experiments below.

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Abstract

The invention discloses a sum-difference tracking angle measurement method capable of resisting main and side lobe interference and based on a block parallel SMI algorithm. The method comprises the steps: 1, obtaining array receiving data, and obtaining the adaptive anti-interference weight of a whole array through a block parallel SMI algorithm; 2, taking the self-adaptive anti-interference weight as a sum beam weight, and symmetrically negating the self-adaptive anti-interference weight according to the central position of the array to obtain a difference beam weight; 3, weighting all snapshot data received by the array according to the sum beam weight and the difference beam weight to obtain sum channel output data and difference channel output data; 4, calculating the difference sum ratio of the sum channel output data and the difference channel output data in a frequency domain; and 5, obtaining a target deflection angle according to the difference sum ratio and the slope of an angle discrimination curve to realize tracking angle measurement of the target. According to the sum-difference tracking angle measurement method, due to the fact that the block parallel SMI algorithm is adopted for self-adaption sum-difference beam forming, accurate angle measurement can be guaranteed, meanwhile, the operand is reduced, and the angle measurement tracking time is greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a sum-difference tracking angle-measuring method based on block parallel SMI algorithm to resist main and side lobe interference. Background technique [0002] With the advancement of interference and anti-interference technology, the electromagnetic environment faced by radar in actual use is becoming increasingly complex. In addition to electromagnetic and noise interference in nature, it also faces complex artificial interference. These problems increase the complexity and complexity of the signal processing process. Difficulty. The most basic and main task of the radar is to effectively detect the target, and at the same time realize the angle measurement and tracking of the target. [0003] At present, phased array radar is widely used for angle measurement and tracking due to its fast scanning capability, antenna beamforming agility and multi-beamform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/68G01S7/36G01S7/28
CPCG01S13/68G01S7/36G01S7/2813
Inventor 陶海红鲍俊竹薛凌坤朱晨睿陈维佳任月瞿建曾操何学辉廖桂生李靖智开宇
Owner XIDIAN UNIV
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