北斗接收机在干扰下的性能研究

Performance Analysis of Beidou Receiver under Interference

通过分析北斗接收机在复杂干扰环境下的性能问题,为抗干扰研究提供了更为专业的理论依据,在卫星导航直接序列扩频通信系统模型的基础上对导航系统在干扰下的误码率、等效载噪比及捕获能力等性能方面进行对比分析,并采用Matlab进行数字仿真。仿真结果表明,窄带干扰比均匀频带干扰对接收机的影响更大,导航信号的性能降低程度与干扰信号带宽及干扰实施的频率等因素有关,导航信号性能改善需要考虑以上多种因素的影响。

After analyzing the performance of the Beidou receiver in complex jamming environment,it provides a specialized theoretical basis for anti-jamming.Though the analysis of satellite navigation direct sequence spread spectrum communication system model,this paper analysed and compared the BER performance and the equivalent load ratio of Beidou satellite navigation system under two common interference,and it also carried out the digital simulation with Matlab.The simulation results show that narrowband interference has greater impacts on the receiver than the band interference.And the navigation signal is reduced on performance level,interference signal bandwidth and position disturbance implementation.So the performance improvement of navigation signal needs to consider a variety of factors mentioned above.