A method of range migration correction for sliding window pulse groups for α-β tracking filter

Abstract

The invention discloses a sliding window pulse group distance migration correction method for alpha-beta tracking filtering. The method includes the following steps that: a sliding window pulse groupdistance migration correction system for alpha-beta tracking filtering is constructed, wherein the system comprises a pulse group update module, an alpha-beta tracking filtering module, a distance migration correction quantity acquisition module, an initial tracking gate preset distance acquisition module and a distance migration correction module; sliding update is performed on a pulse group by the pulse group update module; the alpha-beta tracking filtering module obtains measurement innovation on a k-th filtering period and completes distance tracking filtering on a target; the distance migration correction quantity acquisition module acquires distance migration correction quantity on the k-th period; the initial tracking gate preset distance acquisition module acquires the initial tracking gate preset distance of a sub-pulse group Gk+1 on a (k+1)-th period; and the distance migration correction module performs distance migration correction on each pulse of the sub-pulse group Gk+1on the (k+1)-th period. The method of the invention can effectively compensate signal distance migration on a sliding window pulse group, improve accumulation efficiency, and enhance a signal to noiseratio.

Description

technical field [0001] The invention relates to a method for correcting range migration of radar pulse groups, in particular to a method for correcting distance migration of sliding window pulse groups for α-β tracking filtering. Background technique [0002] In order to obtain a signal-to-noise ratio that meets the detection performance requirements, radar signal detection usually uses pulse groups as the data basis for processing. There are two forms of pulse group: independent pulse group and sliding window pulse group. The former regards N consecutive pulses as a single group, completes accumulation and detection processing on this pulse group, and then discards the pulse group to re-accumulate a group of pulses; the latter also uses N pulses, but in each processing cycle Only update the oldest M pulses, M<N, called the sliding window pulse group, where N is the length of the sliding window, and M is the step size of the sliding window. Obviously, under the premise ...

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Problems solved by technology

[0006] The object of the present invention is to provide a kind of distance migration correction method for the sliding window pulse group of α-β tracking filter, solve the problem that the existing method is not suitable for the distance migration correction under the sliding window pulse group situation

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