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An optimization method for mimo-othr target tracking trajectory

A technique of MIMO-OTHR, optimization method, applied in the direction of reflection/re-radiation of radio waves, instruments, measuring devices, etc.

Active Publication Date: 2020-10-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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(2) The source signal can only have at most one Gaussian distribution

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  • An optimization method for mimo-othr target tracking trajectory
  • An optimization method for mimo-othr target tracking trajectory
  • An optimization method for mimo-othr target tracking trajectory

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[0043] The sky-wave over-the-horizon radar OTHR detects long-distance targets through the reflection of electromagnetic waves by the ionosphere, and its performance is greatly affected by sea clutter and ionosphere. The multi-layer structure of the ionosphere will cause OTHR to generate multi-path echo measurements during data processing. For the two-layer ionosphere structure, it will generate multi-path echo measurements of four different propagation paths: EE, EF, FE, and FF. The existing OTHR target tracking technology MPDA based on phased array technology cannot distinguish four kinds of multipath echoes, so it adopts the establishment of a confirmation gate and correlates all possible echoes at different times in an exhaustive manner, and calculates each The probability of an association relationship, and the correct association relationship can be found through the size of the association probability. This method works well when there is less interference from the ionos...

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Abstract

The present invention provides an optimization method for MIMO‑OTHR target tracking trajectory: receiving echo signals, and performing centralized preprocessing on the echo signals; performing dimensionality reduction and whitening processing on the preprocessed echo signals, reducing Small follow-up processing calculations; randomly initialize the unmixing matrix, maximize the mutual information of the received signal and its estimated value, and use the stochastic gradient algorithm to calculate the unmixing matrix W; use the unmixing matrix to obtain the estimate of the real trajectory through a reversible nonlinear function quantity. The multi-mode tracking trajectory fusion method based on the Informax algorithm of the present invention performs fusion processing on the MIMO-OTHR four-mode echoes based on the two-layer ionospheric model, and improves the target tracking performance of the radar in the case of strong interference, and the effect is better than Existing tracking fusion algorithms such as FastICA.

Description

technical field [0001] The invention belongs to the technical field of target tracking, and in particular relates to an optimization method for a MIMO-OTHR target tracking track. Background technique [0002] The main function of sky-wave over-the-horizon radar (OTHR) is to conduct early warning and monitoring of long-distance ships, aircraft, missiles and other targets. Under a certain detection probability, due to strong ionospheric interference and sea surface In the presence of clutter, there will be a higher probability of false alarm detection, that is, OTHR has a higher probability of false detection than ordinary line-of-sight radars. Therefore, after detecting the target for the first time, it is the main idea of ​​the OTHR target tracking theory to match the target trajectory at the current time and eliminate those obviously unreasonable detection points according to the detection situation at the previous moment. Compared with target detection at a single moment,...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/66G01S7/41
CPCG01S7/415G01S7/418G01S13/66
Inventor 骆春波罗杨刘翔韦仕才吴佳
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA