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Multi-carrier-frequency optimization method for improving detectable speed region in moving target detection

A moving target detection and optimization method technology, applied in the field of radar signal processing and target detection, can solve the problem that the detection performance is not optimal, achieve high moving target detection performance, overcome the low utilization rate of multi-frequency signals, and overcome the unmeasurable speed. The effect of too many intervals

Inactive Publication Date: 2014-03-19
XIDIAN UNIV
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Problems solved by technology

The disadvantage of this method is that the selection of the carrier frequency group is not optimized, and the detection performance is not optimal

Method used

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  • Multi-carrier-frequency optimization method for improving detectable speed region in moving target detection
  • Multi-carrier-frequency optimization method for improving detectable speed region in moving target detection
  • Multi-carrier-frequency optimization method for improving detectable speed region in moving target detection

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0040] Step 1. Select the carrier frequency group

[0041] First, in order to obtain the precise carrier frequency value corresponding to the minimum detectable speed required by the system, the Newton iteration method is used to calculate the carrier frequency value, the initial carrier frequency value and the maximum carrier frequency error are set, and the initial carrier frequency value is iterated until the maximum carrier frequency error is satisfied Require.

[0042] According to the output signal-to-noise ratio formula, the Newton iterative method is used to solve the carrier frequency value corresponding to the minimum detectable speed as follows:

[0043] F ( f min ) ...

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Abstract

A multi-carrier-frequency optimization method for improving a detectable speed region in moving target detection mainly solves the contradiction between the minimum detectable speed and the maximum non-fuzzy speed in moving target detection, and minimizes an undetectable speed region. The multi-carrier-frequency optimization method includes the steps: (1) selecting a carrier frequency group; (2) minimizing the undetectable speed region; (3) judging whether the maximum non-fuzzy speed reaches standards or not; and (4) outputting an optimal carrier frequency group. By a Newton iteration method, a precise carrier-frequency value corresponding to the minimum detectable speed is obtained, and the shortcoming that the minimum detectable speed of a transmitting carrier frequency in the prior art cannot effectively meets actual requirements is overcome, so that the multi-carrier-frequency optimization method has the advantages of high precision and high moving target detection performance. By means of iterative optimization after progressively selecting the carrier frequency group, the shortcomings of excessive undetectable speed regions and low utilization rate of multi-frequency signals in moving target detection of the prior art are overcome, so that the multi-carrier-frequency optimization method has the advantages of high carrier-frequency utilization rate and wide speed range in moving target detection.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and further relates to a multi-carrier frequency joint detection optimization method in the technical field of target detection. The invention can be applied to the ground moving target detection of the multi-frequency multi-channel radar of the moving platform. In the case that the optional range of carrier frequency is limited, the method optimizes the carrier frequency group of the multi-frequency multi-channel system to obtain the maximum measurable speed range with the least number of carrier frequencies. Background technique [0002] The traditional single-channel system can realize the moving target detection function by using frequency domain filtering, emission characteristic displacement, time-frequency analysis and other methods, but the performance of moving target detection in the main lobe clutter area is poor, and the multi-channel system can suppress the main lobe ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
Inventor 杨志伟廖桂生杜文韬刘久利李延曾操束宇翔何嘉懿
Owner XIDIAN UNIV
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