Rapid radar performance assessment method in sea cluster background

Abstract

The invention discloses a rapid radar performance assessment method in a sea cluster background. The main idea is as follows: through performing Doppler frequency discretization on distance rings corresponding to distance gates of airborne radar echo signals, corresponding cluster block positions and a cluster block area are obtained, after single-pulse echo power of a target is obtained according to the airborne radar echo signals, cluster block power is calculated, based on this, a covariance matrix of the radar echo signals is constructed, an original distance Doppler graph is formed, accordingly, an expanded distance Doppler graph is obtained, then after the output signal-to-noise ratio of the position of the target is calculated when the target position changes, a detection blind area graph under the condition of multiple single repeated pulse frequencies is obtained, accordingly, a detection blind area graph under a 2 / 4 criterion is formed, according to the detection blind area graph under the 2 / 4 criterion, the maximum detection distance and the minimum detectable speed of the target are obtained when an airborne radar cross section is determined, and accordingly, whether the performance of an airborne radar meets design requirements is determined.

Description

Technical field [0001] The invention belongs to the technical field of radar performance evaluation, and particularly relates to a rapid radar performance evaluation method under the background of sea clutter, and is suitable for rapid evaluation of radar performance under the background of sea clutter. Background technique [0002] The radar performance evaluation method can effectively evaluate the working ability of the radar system, provide guarantee for the real-time, reliability and accuracy of the radar echo data, and can help to set the parameters of the radar system to achieve the optimal performance of the radar system under actual conditions The accuracy of radar performance evaluation is also related to the success or failure of radar system design. [0003] The radar performance can be evaluated by using a detection blind zone map. From the detection blind zone map, the maximum detection range and minimum detectable speed of the radar system can be obtained, and then w...

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Problems solved by technology

[0004] In order to obtain the detection blind zone map under the 2 / 4 criterion, the existing method is to first construct the covariance matrix of the radar echo data according to the conventional space-time clutter model. The fine discretization of the azimuth and angle of the range ring results in a huge amount of calculation and a very high computational complexity, so that it is difficult to achieve in practical applications

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