Radar moving target detection method based on sea clutter background of Doppler oversampling

Abstract

The invention provides a radar moving target detection method based on a sea clutter background of Doppler oversampling, and relates to the field of target detection on the sea clutter background. The method includes the first step of receiving echo data, the second step of carrying out oversampling and Fourier transformation on selected data, the third step of calculating detection statistics, the fourth step of giving false alarm probability and determining a detection threshold in a Monte Carlo algorithm, the fifth step of comparing the detection statistics with the threshold and judging whether a target exists or not, the sixth step of carrying out the steps from the second step to the fifth step on all distance units in the echo data to obtain the distance unit where the target exists, the seventh step of obtaining new detection data and the eighth step of obtaining the new distance unit where the target exists. The method mainly solves the problem that in the prior art, the number of pulses is small, consistence of Doppler center frequency and Doppler channels of signals is not good, and large targets have a shielding effect on surrounding small targets, so that a detection effect is unsatisfactory.

Description

technical field [0001] The invention belongs to the technical field of radar target detection, and relates to a target detection method in the background of sea clutter, in particular to a detection method for radar moving targets in the background of sea clutter based on Doppler oversampling, which is used in the background of sea clutter Moving object detection under. Background technique [0002] Radar target detection under the background of sea clutter has always been an important topic and research direction in scientific research, military and civilian fields. In the military, it is mainly used for sea surveillance of aircraft and cruise missiles; in civilian use, it is mainly used for the detection of ships, icebergs, etc. Therefore, target detection in the background of sea clutter is very necessary. Object detection in sea clutter background can be done in both time domain and frequency domain. In many cases, it is difficult to distinguish the target from the clu...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention proposes a detection method of radar moving targets under the background of sea clutter based on Doppler oversampling, which realizes the detection of moving targets under the background of sea clutter, and solves the problems caused by the number of pulses in the existing methods. There are less problems that the Doppler center frequency of the signal is not consistent with the Doppler channel, and the large target obscures the surrounding small targets, resulting in unsatisfactory detection results

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