A dual-channel single-pulse angle measurement method for weak targets based on reference signals

Abstract

The present invention provides a two-channel single-pulse angle measurement method for a weak target based on a reference signal. Compared with the traditional three-channel single-pulse angle measurement algorithm, the present invention combines the azimuth difference channel and the pitch difference channel into one difference channel, which is composed of a sum channel The measured values ​​of the pitch angle and the azimuth angle are obtained by performing signal processing on two channels; that is to say, the present invention is a dual-channel single-pulse angle measurement method based on channel merging, which reduces the number of receiver channels, thereby reducing volume, quality, and power consumption and other hardware resources, which are more suitable for small integrated platforms; furthermore, the present invention solves the problem of receiving signals under the non-coherent working system of the small integrated platform with separate sending and receiving by introducing reference signals and performing matching filtering with the sum and difference channel signals. The angle measurement problem caused by random phase and non-coherent frequency difference between medium pulses enables coherent accumulation between different pulses, which greatly improves the angle measurement performance of weak targets.

Description

technical field [0001] The invention belongs to the technical field of radar measurement, in particular to a method for measuring the angle of a weak target with two channels and single pulses based on a reference signal. Background technique [0002] For the angle measurement of weak targets, the traditional single-pulse angle measurement technology can achieve the purpose of improving the angle measurement accuracy by adding auxiliary channels and coherent accumulation. [0003] In the article "Radar Measurement Extraction in the Presence of Sea-Surface Multipath" published by A. Sinha et al. in IEEE Transactions on Aerospace and Electronic Systems, Vol. 39, No. 2, pp. 550-567, a multipath The angle measurement error caused by specular reflection and diffuse reflection in the effect, thereby improving the algorithm of angle measurement accuracy. In the article "Amplitude Angle MonopulseEstimation for the Four-channel Hybrid Polarimetric Radar System" published by Yi Zhang...

AI Technical Summary

Problems solved by technology

[0005] However, for a small integrated platform with a shared transmitter source, a non-coherent working system with separate transceivers is adopted, and there are non-coherent frequency differences and random initial phases between received echo pulses. The problem of low angular accuracy and the inability to achieve coherent accumulation

Images