扩频通信系统中一种基于FPGA的匹配滤波同步捕获方法

摘要

Through researching the principle of synchronization capture to match filter and using good auto-correlation of PN code in spread spectrum communication system, this paper provides an improved realizable method of synchronization capture using digital match filter based on FPGA. It can implement carrier and code synchronization simultaneously in low signal to noise ratio. Moreover, it reduces the sampling rate and resource consumption in the chip without loss synchronization accuracy, it also gives effect of synchronization accuracy to the BER performance and analysis of resource consumption in the chip.%本文通过对匹配滤波器同步捕获原理的研究,利用扩频通信系统中PN码良好的自相关性,提出了基于FPGA实现的全数字匹配滤波的改进同步捕获方法,在低信噪比下可实现载波和码元同时同步,且在不损失同步精度的前提下降低了采样率及片内资源消耗,并给出了同步精度对误码性能的影响及片内资源消耗分析.