多源宽带干扰对多阵元GPS接收机干扰效能分析

The Jamming Efficiency Analyze of Multiply GPS Broadband Sources Interference for GPS Receiver with Multiply Module

近年广泛使用的多阵元自适应调零天线抗干扰技术,大幅降低了单个GPS干扰源的干扰效能,如何对其实施有效干扰成为导航对抗的研究热点之一。本文首先使用干扰-信号比阈值分析了多阵元接收机失效机制,并使用单源干扰对其抗干扰效能进行了检验;其次建立了多源宽带高功率压制干扰模型,最后采用数值仿真研究了多源宽带高功率压制模式下,干扰4阵元线性约束最小方差(LCMV)自适应调零算法GPS接收机的工作效率。实验表明,采用本文所提方法布置的多源宽带高功率压制模式可以有效提升对多阵元GPS系统的干扰效能。

The multiply module adaptive nulling antenna were applied widely in the GPS system in recent years, which weakened the jamming efficiency of single GPS interference station. The method of how to improve the interference efficiency became a hot issue. The failure mechanism of multiply module receiver based on threshold ratio of interference signal was analyzed at the beginning, and then the jamming countermeasure efficiency of the multiply module receiver to a single satiation jamming was tested. The high-power broadband jamming jointed mode was building at last, and the interference efficiency was researched by mathematic simulations, which multiply stations with broadband high-power suppression model jammed the receiver which applied the 4 element antenna using the minimum linear constraint equation algorithm （LCMV） adaptive null algorithm. The results indicated that the interference efficiency of the multiply module GPS system was im- proved effectively by the multiply stations using high-power broadband jamming models with properly arrangement.