中文摘要：

针对无线电导航系统中存在的远近效应和天波干扰,提出了一种选通的部分并行干扰抵消方法,通过捕获跟踪输出的相关峰值判决对强干扰信号进行选通并抵消,从而提高接收机对弱导航台信号的捕获性能.给出了算法的结构及理论分析,并对算法进行了仿真.结果表明：部分干扰抵消算法能够消除无线电导航系统中存在的远近效应和天波干扰,改善导航接收机的捕获性能,消除导航接收机的工作盲区.最后采用现场可编程门阵列技术对其进行了硬件电路设计和实验验证,并进行了实验验证,结果表明该方法能够改善弱信号的信噪比,消除远近效应和天波干扰.

英文摘要：

A selective partial parallel interference cancellation method was presented to eliminate the far-near effect and sky-wave interference in radio navigation systems, in which the strong interference signal judged by the statistics of the acquisition and tracking output was selected and cancelled, there-by improving the acquisition performance on the weak navigation signals of the navigation receiver. The structure of the algorithm and theoretical analysis were given. The simulation results show that the selective partial interference cancellation method can eliminate the far-near effect and sky-wave interference existing in radio navigation systems, and improve the acquisition performance of the naviga tion receiver and effectively eliminate the blind work area of the navigation receiver. The hardware circult was completed with the field programmable gate array technique and the experiment results show that the proposed method can improve the signal to-noise （SNR） of the weak signal effectively and eliminate the far-near effect and the sky-wave interference.