Multichannel interframe combined marine target detection method based on multilevel false alarm feedback

Abstract

The invention relates to a multichannel interframe combined marine target detection method based on multilevel false alarm feedback, and mainly solves the problems of insufficient clutter resistance and low target detection performance in the marine clutter background. The method is realized by the steps of 1) data preprocessing, in which original echo video data is converted into uniform distancedimension and direction dimension; 1) multichannel accumulated detection and channel false alarm control, in which multi-channel interframe accumulated detection is carried out on the preprocessed video data to obtain a channel detection result, false alarm of the channel detection result is counted, and a channel detection threshold is adjusted dynamically by feedback; and 3) integrated output and integrated false alarm control, in which the channel detection results of multiple channels are integrated to obtain an integrated detection result, false alarm of the integrated detection result is counted, and a channel false alarm index is dynamically adjusted by feedback. Thus, the target detection and anti-clutter capability of a shore-based two-coordinate radar in the marine clutter background can be improved by multichannel interframe accumulation and multilevel false alarm feedback.

Description

technical field [0001] The invention belongs to the technical field of radar target detection, in particular to a detection method for slow and weak targets under the background of sea clutter. Background technique [0002] The problem of target detection in the background of sea clutter has always been a hot topic in the field of radar research. Since the echo signal-to-clutter ratio of the target is low in the background of sea clutter, the traditional constant false alarm detection method cannot ensure the detection probability of the target. Although lowering the detection threshold can improve the detection probability of targets with low signal-to-clutter ratio, sea clutter will cause many false alarms and cause the system to fail to work normally. In view of the above problems, Scan-to-Scan Integration (SSI) technology is an effective means to solve this problem. SSI technology is essentially an M / N detector between frames, which is based on the Weak correlation betw...

AI Technical Summary

Problems solved by technology

[0002] The target detection problem in the background of sea clutter has always been a hot issue in the field of radar research. Due to the low signal-to-clutter ratio of the target’s echo in the background of sea clutter, the traditional constant false alarm detection method cannot ensure the detection probability of the target.

Therefore, a single M / N detector cannot effectively suppress false alarms while being applicable to targets of various speeds

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