Hangkong bingqi (Apr 2022)
Influence of Constellation Distribution on Anti Jamming Performance of Navigation Adaptive Nulling System
Abstract
Adaptive nulling antenna is the main means of anti-jamming for navigation system, and its anti-jamming performance is affected by many factors. Firstly, the influence of the nulling of adaptive antenna, the fluctuation of antenna pattern and the constellation distribution on the anti-jamming performance of adaptive nulling navigation system is analyzed qualitatively in this paper. Secondly, the anti-jamming performance of adaptive nulling navigation system in typical scenes is analyzed quantitatively by mathematical simulation. Finally, the field experiment of the GPS receiver with adaptive nulling antenna is designed. Combined with the constellation distribution in the experimental period and the carrier-to-noise ratio of adaptive nulling navigation receiver under different incident pitch angles, the anti-jamming performance of the receiver is analyzed. The results of the theoretical analysis are verified by field experiment, and some conclusions related to the factors such as adaptive nulling antenna null, antenna pattern and constellation distribution are obtained.
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