High-resolution radar angle tracking method based on regularization optimization

Abstract

The invention provides a high-resolution radar angle tracking method based on regularization optimization. The method can utilize a regularization optimization method to search an optimum angle measurement value, thereby reducing angle measurement error, and has important significance for high-resolution radar short-range angle tracking. The method comprises the following steps: 1) carrying out pulse compression on echo waves received by high-resolution radar sum / difference channels, and carrying out target detection on signals obtained after sum channel pulse compression, and recording range cells where target scattering points locate; 2) carrying out monopulse angle measurement on the detected range cells; and 3) carrying out regularization optimization on the angle measurement value at the current period: substituting each possible angle value into a cost function, and selecting the angel, which enables C( theta) to have the minimum value, as the output.

Description

technical field [0001] The invention belongs to the technical field of high-resolution radar, in particular to a high-resolution radar angle tracking method based on canonical optimization. Background technique [0002] In radar short-range angular tracking, angular scintillation is one of the main sources of tracking error, and in severe cases, it may even direct the beam out of range of the target, resulting in loss of the target. According to the current research, the angular scintillation is mainly caused by the phase superposition of multiple scattering points in the same resolution unit. The relative movement of these scattering points aggravates the amplitude fluctuation of the echo, thus increasing the angle measurement error. At the same time, these angle measurement errors do not satisfy the Gaussian distribution, resulting in a significant decline in the performance of a large number of filters designed based on Gaussian distribution noise; on the other hand, for...

AI Technical Summary

Problems solved by technology

But high-resolution radar cannot resolve targets infinitely, so it can only reduce but not completely avoid angular scintillation

On the other hand, high-resolution radar distinguishes a target into multiple scattering points, which reduces the signal-to-noise ratio of each scattering point to a certain extent, and may introduce new angle measurement errors

For this problem, engineers often use methods such as taking the maximum value, multi-point average, and weighted average. These methods can reduce the angle measurement error to a certain extent, but it is still difficult to meet the actual application needs when the signal-to-noise ratio is low.

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