基于软件接收机的卫星导航抗干扰天线性能评估方法

Performance evaluation of satellite navigation anti-jamming antennas based on software receivers

针对分体式设计的卫星导航抗干扰终端缺少天线性能评估方法,与接收机参数适配难,测试环境构建成本高等问题,基于软件接收机能够可视化导航信号基带处理过程的特点,提出一种多阵元抗干扰天线性能评估方法:从输出信号质量、可捕获性、可跟踪性等方面给出评估方法,设计软件接收机评估抗干扰天线性能;然后以导航型天线、测量型天线、无干扰时的抗干扰天线和有微弱干扰时的抗干扰天线作为实验对象,利用软件接收机对不同天线的输出信号质量、信号可捕获性和信号可跟踪性进行对比分析;最后分析多阵元天线对干扰信号的抑制特性,并实验评估不同干扰功率条件下多阵元天线输出信号质量、可捕获性和可跟踪性曲线。结果表明,利用软件接收机评估卫星导航抗干扰天线性能是可行的。

Aiming at the problems of the lack of antenna performance evaluation methods,the difficulty of adapting to the receiver parameters,and the high cost of constructing the testing environment for satellite navigation anti-jamming terminals designed by the split type,the paper proposed a multi-element anti-jamming antenna performance evaluation method based on the characteristic that software receivers can visualize the navigation signal baseband processing:the evaluation means were given from the aspects of output signal quality,signal captureability and signal traceability,and a software receiver was designed to evaluate the performance of anti-jamming antennas;then,taking navigation antennas,measurement antennas,anti-jamming antennas without interference and anti-jamming antennas with weak interference as the experimental objects,the software receiver was used to comparatively analyze the output signal quality,signal captureability and signal traceability of different antennas;finally,the suppression characteristics of multi-array antennas to interference signals were analyzed,and the output signal quality,captureability and traceability curves of the multi-array element antennas under different interference power conditions were evaluated.Results verified the feasibility of using software receivers to evaluate the performance of satellite navigation anti-jamming antennas.