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Sliding window pulse group distance migration correction method for alpha-beta tracking filtering

A technology of distance migration correction and tracking filtering, applied in radio wave measurement systems, instruments, etc., to improve the cumulative signal-to-noise ratio and eliminate losses

Active Publication Date: 2018-07-24
BEIJING INST OF REMOTE SENSING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Sliding window pulse group distance migration correction method for alpha-beta tracking filtering
  • Sliding window pulse group distance migration correction method for alpha-beta tracking filtering
  • Sliding window pulse group distance migration correction method for alpha-beta tracking filtering

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Embodiment 1

[0044] A kind of distance migration correction method for the sliding window pulse group of α-β tracking filter has specific steps as follows:

[0045] The first step is to build a range migration correction system for sliding window pulse groups for α-β tracking filtering

[0046] The distance migration correction system for the sliding window pulse group of α-β tracking filter, including: pulse group update module, α-β tracking filter module, distance migration correction acquisition module, initial tracking gate preset distance acquisition module and distance Migration correction module.

[0047] The function of the pulse group update module is: slide update the pulse group;

[0048] The function of the α-β tracking filter module is to obtain the measurement innovation on the kth filter cycle and complete the distance tracking filter for the target;

[0049] The function of the distance migration correction amount acquisition module is to obtain the distance migration cor...

Embodiment 2

[0078] A sliding window pulse group distance migration correction system for α-β tracking filtering, including: a pulse group update module, an α-β tracking filter module, a distance migration correction amount acquisition module, and an initial tracking gate preset distance acquisition module and the distance migration correction module. The pulse group update module, the α-β tracking filter module, the distance migration correction quantity acquisition module, the initial tracking gate preset distance acquisition module and the distance migration correction module are connected in sequence.

[0079] Among them, the pulse group update module performs sliding update on the pulse group, and the α-β tracking filter module obtains the measurement innovation on the kth filter cycle while completing the target tracking filter; the distance migration correction value acquisition module obtains the kth cycle The distance migration correction amount on the above, the initial tracking ...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40G01S7/285
CPCG01S7/285G01S7/40
Inventor 吴纲颜冰吴玲燕王萱芬钱磊邹旸
Owner BEIJING INST OF REMOTE SENSING EQUIP
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