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A Method for Resolving Velocity Ambiguity in Pulse Doppler Radar

A technology of pulse Doppler and velocity resolution, which is applied in the direction of radio wave reflection/re-radiation, instruments, measuring devices, etc., can solve the problems of pulse Doppler radar velocity ambiguity and Doppler velocity ambiguity, and achieve High confidence and resistance to SNR fluctuations, avoiding distance ambiguity, and eliminating effects

Active Publication Date: 2021-12-10
WUHAN BINHU ELECTRONICS
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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for resolving the velocity ambiguity of the pulse Doppler radar, which can resolve the Doppler velocity ambiguity when the echo information of the moving target is not ideal, thereby obtaining the velocity ambiguity of the moving target. the true speed of

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  • A Method for Resolving Velocity Ambiguity in Pulse Doppler Radar

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[0082] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0083] The embodiment of the present invention provides a method for solving velocity ambiguity of pulse Doppler radar, which can be applied to the field of radar signal processing algorithms.

[0084] see figure 1 and figure 2 , a method for solving velocity ambiguity with pulse Doppler radar includes the following steps:

[0085] The number of radar pulse repetition periods PRI used in this embodiment is 5, recorded as PRI1, PRI2, PRI3, PRI4, PRI5, respectively 461us, 481us, 500us, 528us, 549us; the corresponding carrier frequency is recorded as Fc1, Fc2 . s, -100m / s, 212m / s.

[0086] The speed estimation interval for solving the Doppler v...

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Abstract

The invention relates to the field of radar signal processing, in particular to a method for solving velocity ambiguity of pulse Doppler radar. The present invention includes three main steps, respectively, step A: according to the radar parameters and the apparent speed of the target, and the first threshold, the speed estimation interval is divided into intervals, and a possible speed matrix is ​​screened out; step B: according to the second threshold, Screen the possible speed matrices to obtain the speed matrices to be determined to be true or false; step C: perform speed mutuality screening on the speed matrices to be judged to be true or false, eliminate false speeds, and obtain the target truths arranged in descending order of confidence speed matrix. The invention can solve Doppler velocity ambiguity when the echo information of the moving target is not ideal and does not introduce distance ambiguity, so as to obtain the real speed of the moving target.

Description

technical field [0001] The invention relates to the field of radar signal processing, in particular to a method for solving velocity ambiguity of pulse Doppler radar. Background technique [0002] The speed ambiguity problem is an inherent problem of pulse Doppler radar. When the repetition frequency of the radar’s transmitted pulse is less than the maximum Doppler frequency of the moving target, the speed ambiguity will occur; thus the radar cannot obtain the real speed of the moving target, resulting in the inability to Realize the follow-up functions such as radar target speed measurement and target tracking. [0003] To eliminate velocity ambiguity, there are currently two common solutions: one is to increase the repetition frequency of radar transmitted pulses, but too high pulse repetition frequency will cause the range ambiguity of moving targets; the other method is to use multiple different repetition rates. At the same time, the moving target is detected at high f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41G01S13/58
CPCG01S7/415G01S13/58
Inventor 桂雨洋徐敏超陈钟厉芸
Owner WUHAN BINHU ELECTRONICS
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