A Method for Self-registration of Radar Network Errors with External Radiation Sources

Abstract

The invention discloses an external illuminator radar net error automatic registration method. According to the method, measurement information of all receiving stations is utilized for automatic registration, and under the condition that all the receiving ends can provide demodulation information of ADS-B (automatic dependent surveillance broadcast) or AIS (automatic identification system) and the like, if the demodulation information contains target state data detected by a radar, the data are used as reference data and compared with measurement data of the radar to obtain registration parameter estimators; if the demodulation information does not contain target state data detected by the radar, through measurement of multiple targets, a registration model is constructed, the registration problem boils down to the nonlinear parameter estimation problem, through a series of operations and rational approximation, the model is further converted to a quasi-linear model, and then least-squares estimation and post-processing are adopted to obtain registration parameters.

Description

technical field [0001] The invention belongs to the field of radar data processing, and relates to an error registration method for multi-sensor network fusion, in particular to an error self-registration method for external radiation source radar network errors. Background technique [0002] External radiation source radar (also known as passive radar) is a radar system that uses electromagnetic signals emitted by a third party to detect targets. It does not emit signals, so it has low cost, good concealment, strong anti-interference ability, and electromagnetic compatibility. Good and so many advantages. However, due to the uncontrolled launch, the simple bistatic geometric structure based on single-transmission and single-reception often cannot meet the requirements in coverage. s solution. External radiation source radar is a multi-sensor networking system, how to effectively register the systematic error (ie mismatch) of each information measurement unit is a key tech...

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Problems solved by technology

[0004] 1) The distance measurement is the bibase distance, which is the sum of two Euclidean norms. Compared with the single-base distance, the nonlinearity is more serious, and the processing is more complicated;

[0005] 2) Due to the low transmission power, the external radiation source radar network often has the characteristics of "small and many" (single station scale is small and the number of stations is large), and its angle of arrival measurement accuracy is low (some systems do not even perform arrival angle measurement)

[0007] Compared with the active multistatic radar, the external radiation source radar network is close to it in terms of geometric structure, but the transmitting station in the external radiation source radar network is not controlled, so the active multistatic radar adopts such as atomic clock, GPS and The synchronous registration method of sending and receiving cooperation such as information exchange protocol cannot be applied in the external radiation source radar network

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