Research of adaptive anti interference technology based on Beidou navigation system
QIAN Chunlei;LU Feiping;WU Yang;LIN Ming;School of Electronic and Information,Jiangsu University of Science and Technology;Shanghai Electric Control Institute;
The Beidou dual frequency anti interference is taken as the research object of this paper and the emphasis is laid on the anti interference algorithm of B1 and S frequency. An array signal model of dual frequency circular array is constructed and the principle of space-time filtering,weight recognition criteria LCMV,and the characteristics of the power inversion array are described,and the optimal weights of the space-time filter are obtained on the basis of the LMS algorithm. Then,MATLAB is used to simulate the performance of the algorithm.The simulation results show that the power inversion based on LMS algorithm can make the antenna array in the direction of interference automatically generate nulling. Finally,the algorithm is tested on the actual hardware platform to verify the feasibility of the algorithm.