Pulse Doppler radar velocity ambiguity resolving method

A pulsed Doppler and velocity solution technology, applied in the direction of reflection/re-radiation of radio waves, use of re-radiation, measurement devices, etc. , to achieve high confidence and anti-signal-to-noise ratio fluctuations, the effect of eliminating influence

Active Publication Date: 2020-01-10
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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  • Pulse Doppler radar velocity ambiguity resolving method

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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 with figure 2 , a method for solving velocity ambiguity with pulse Doppler radar comprises 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...

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Abstract

The invention relates to the field of radar signal processing, in particular to a pulse Doppler radar velocity ambiguity resolving method. The method comprises the three main steps that A, a velocityestimation interval is divided according to radar parameters, a target apparent velocity and a first threshold, and possible velocity matrixes are screened out; B, screening is performed on the possible velocity matrixes according to a second threshold, and velocity matrixes about to judge authenticity are obtained; and C, velocity difference screening is performed on the velocity matrixes about to judge authenticity, pseudo-velocities are eliminated, and target real velocity matrixes arranged according to the descending order of confidence are obtained. Through the method, Doppler velocity ambiguity can be resolved under the situation that echo information of a moving target is not ideal and distance ambiguity is not introduced, and therefore real velocities of the moving target are obtained.

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...

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Application Information

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Patent Type & Authority Applications(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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