Detection method for floating radar targets on sea surface based on polarization multi-features

Abstract

The invention discloses a polarization multi-feature based method for detecting an ocean floating radar target. The method comprises the following steps: (1) transmitting a pulse signal by a radar transmitter, receiving anchored data by a radar receiver, and constructing a receiving vector of a detection unit and a receiving vector of a reference unit in the anchored data under H0 hypothesis and H1 hypothesis; (2) respectively calculating two polarization features of the detection unit and two polarization features of the reference unit; (3) respectively calculating the relative Doppler peak height of the detection unit and the relative Doppler peak height of the reference unit; (4) respectively calculating the combined feature of the detection unit and the combined feature of the reference unit; (5) calculating the detection statistics of the detection unit; and (6) determining that a target exists in the detection unit and the H1 hypothesis is established if the detection statistics of the detection are more than zero, and determining a target does not exist in the detection unit and the H0 hypothesis is established if the detection statistics of the detection are not more than zero.

Description

technical field [0001] The invention belongs to the technical field of radar target detection, and in particular relates to a method for detecting radar targets floating on the sea surface based on polarization multi-features, which can be used to detect weak radar targets floating on the sea surface under the background of sea clutter. Background technique [0002] Monitoring low-speed or floating weak radar targets on the sea surface, such as buoys, broken icebergs, boats, floating boards, etc., is the main task of sea surface monitoring radars. The nature of sea clutter varies continuously with radar parameters, radar viewing geometry, and sea surface conditions. When the high-resolution radar works at a small grazing angle, the echo signal of the faint radar target floating on the sea surface among the echo signals received by the radar receiver is too weak to be found by simple energy integration. Radar with higher azimuth resolution is usually used to detect weak rada...

AI Technical Summary

Problems solved by technology

Subsequently, a radar target detection method based on the energy characteristics of radar echo signals was proposed, but because the detection information used in this method is single, and the time required for feature extraction is long, and the observation time for radar targets is too long, so for weak radar floating on the sea surface Target detection is difficult to achieve better results

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