极低信噪比下的一种扩频伪码捕获算法研究

A PN Code Acquisition Method and Performance Analysis in Very Low SNR

本文针对新型的卫星用接收机伪码捕获的性能指标要求 ,设计了一种基于中频直接采样数字化的伪码捕获算法。实验证明 ,这种捕获算法易于采用可编程门阵列和数字信号处理器相结合的方式实现 。

This paper proposed a PN code acquisition method based on IF sampling to implement a new type of satellite receiver. Computer simulation shows that this algorithm can get rapid PN code acquisition in very low SNR and is easy to be realized in FPGA and DSPs.