GPS 矢量跟踪建模与抗干扰性能分析

摘要

The anti-interference performance of GPS vector tracking loop is discussed deeply .The systematic models and bandwidth models of vector delay lock loop and vector frequency lock loop are es -tablished , and based on the analysis for noise bandwidth of vector tracking loop , it is illustrated that vec-tor tracking loop is capable of adaptively adjusting the noise bandwidth to adapt to the interference envi -ronments of different intensity .The interference-to-signal ratio is computed with the measurement errors within vector tracking loop to determine the anti-interference performance in complex environments .Com-pared with scalar tracking loop , GPS vector tracking loop has stronger anti-interference ability .%对GPS矢量跟踪环路的抗干扰性能进行了深入讨论。建立了矢量延迟锁定环及矢量频率锁定环的系统模型及带宽模型，分析说明了矢量跟踪环路能够自适应调整噪声带宽，从而适应不同强度的干扰环境；结合环路内的测量误差，计算得到矢量跟踪环路的干信比容限，确定了复杂环境中矢量跟踪环路的抗干扰性能。通过与标量跟踪的比较分析表明， GPS矢量跟踪具有更强的抗干扰能力。