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Multi-station multi-external-radiation-source radar moving target positioning method based on error correction

An external radiation source radar and error correction technology, which is applied to the reflection/re-radiation of radio waves, the use of re-radiation, measurement devices, etc. Error, the effect of reducing complexity

Active Publication Date: 2020-03-31
HANGZHOU DIANZI UNIV
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Problems solved by technology

The patent (201811601502.4) studies target positioning and error correction in a single-station multi-external radiation source scenario. This method cannot be directly applied to a multi-station multi-external radiation source scenario. For this, this patent designs a multi-station multi-external radiation source based on error correction. Locating Method of Emitter Radar Moving Target

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  • Multi-station multi-external-radiation-source radar moving target positioning method based on error correction
  • Multi-station multi-external-radiation-source radar moving target positioning method based on error correction
  • Multi-station multi-external-radiation-source radar moving target positioning method based on error correction

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Embodiment Construction

[0018] A multi-station and multi-external radiation source radar moving target positioning method based on error correction, the method specifically includes the following steps:

[0019] Step 1: In a radar network with multiple stations and multiple external radiation sources, it includes M external radiation sources, N receiving stations and P targets, and the dimension of positioning is D=3. The position of the mth external radiation source is The position of the nth receiving station is the location of the target p speed The receiving station n receives the signal emitted by the external radiation source m scattered by the target p, and the double base distance measurement is obtained as follows

[0020]

[0021] Among them, u m,n,p is the sum of the distances from the target p to the outer radiation source m and the receiving station n; is the distance from the external radiation source m to the target p, is the distance from receiving station n to target p...

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Abstract

The invention discloses a multi-station multi-external-radiation-source radar moving target positioning method based on error correction. The method comprises the following steps: firstly, pseudo-linearizing a double-base-distance nonlinear measurement equation and a double-base-distance change rate nonlinear measurement equation of the multi-station multi-external-radiation-source radar to obtainjoint estimation of the position and the speed of a moving target and system deviation; considering the correlation between the auxiliary variable and the target position and speed, constructing a multi-step correlation least square estimation model, and carrying out the optimization solving, so as to reduce the estimation error of the target position and speed; and finally, correcting by using the system deviation estimation value, and performing posteriori iteration to further improve the estimation performance of the target position and speed. The influence of system deviation on the positioning precision is considered, the target state and the system deviation are jointly estimated, and the positioning precision of the moving target is improved through error correction. And meanwhile,multi-step correlation least square estimation and a posteriori iterative algorithm are adopted, so that the estimation error of the target state is further reduced.

Description

technical field [0001] The invention belongs to the field of radar data processing, in particular to an error correction-based multi-station and multi-external radiation source radar moving target positioning method. Background technique [0002] Multi-station multi-external radiation source radar uses multiple third-party non-cooperative signal sources (radio, television, satellite, base station, etc.) The signal and the direct wave signal are measured by coherent processing to obtain the time difference of arrival and frequency difference of arrival of the signal. Under the multi-base structure, the parameters of time difference and frequency difference are transformed into parameters of double base distance and double base distance change rate, and multiple sets of double base distance / double base distance change rate are combined to locate the moving target. [0003] At present, the problem of external radiation source location based on double base distance and double b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88G01S7/40
CPCG01S13/88G01S7/40
Inventor 左燕蒋陶然刘雪娇郭宝峰刘俊
Owner HANGZHOU DIANZI UNIV
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