Research on aircraft direction finding based on antenna directionality parameter identification
Radar direction finding is an essential cooperative monitoring method for aircraft,and the directional parameters of the direction finding antenna determine the accuracy of direction finding.A modified amplitude comparison direction finding model is proposed based on the traditional principle of adjacent amplitude comparison direction finding and the error of amplitude comparison direction finding.Based on the correction of amplitude comparison direction finding model,an error correction genetic simulated annealing(COR-GSA)algorithm is proposed to identify unknown directional antenna directionality parameters by determining the antenna directionality parameters that need to be identified.Identification experiments are conducted using a self-designed dual channel direction finding receiver,and 1 000 sets of aircraft real azimuth data are used for verification.The results show that using the COR-GSA algorithm to identify antenna directional parameters has the highest direction finding accuracy.Finally,the identified antenna directionality parameters are used to track the aircraft's azimuth,and the tracking error is reduced by 18.3％compared to the tracking error without azimuth correction.
aircraft direction findingantenna parameter identificationcorrection of amplitude comparison direction findingazimuth tracking
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