滤波器阶数对导航接收机时域抗干扰的影响研究

Study on the Influence of Filter Order on Time Domain Anti-jamming of Navigation Receiver

随着电磁环境恶化以及干扰强度和复杂度的升级,对导航接收机的抗干扰能力提出了更高的要求。针对目前导航接收机对滤波器阶数缺乏深入研究的现状,文中从时域自适应滤波器的阶数入手,对其抗干扰性能进行了研究。然后对不同干扰环境下的滤波器级抗干扰性能进行了分析,提出了一种基于抗干扰需求的最优阶数设计方法。仿真结果显示,适当增大滤波器的长度,可提高其抗干扰的能力,在工程实践中可以针对具体的抗干扰要求来优化滤波器的阶数。

With the deterioration of electromagnetic environment and the upgrade of interference intensity and complexity,higher requirements are put forward for the anti-interference ability of navigation receiver.In view of the lack of in-depth research on filter order in navigation receivers,this paper studies the anti-jamming performance of adaptive filter from the perspective of its order.Then the anti-jamming performance of filter stage under different interference environments is analyzed.An optimal order design method based on anti-interference requirements is proposed.The simulation results show that the anti-interference ability can be improved by increasing the length of the filter appropriately.In engineering practice,the order of filter can be optimized according to the specific anti-interference requirements.