基于FPGA的数字扩频接收机的设计与实现

Design and Implementation of Spread Spectrum Digital Receiver Based on FPGA

随着数字化时代的飞速发展,对于具有良好性能指标的数字直接扩频系统在各个通信领域有着广泛的应用,该文介绍一种基于FPGA的数字化直扩接收机的设计与实现,它采用优化的数字匹配滤波器来实现扩频序列的同步捕获,大大减小了系统的资源;通过在跟踪环路中加入特殊的环路滤波器使得接收机跟踪的性能得到提高;同时由于接收机中关键模块采用了参数化设计,这使得系统有非常大的灵活性。

With the rapid development of the digital age,to have good performance of digital direct spread spectrum system has been widely used in various communication domain,this paper introduces a digital spread spectrum receiver based on FPGA,the design and implementation of its optimization of digital matched filter is used to realize in acquisition of spread spectrum sequence,greatly reduces the system's resources;By adding special loop filter makes the receiver tracking loop tracking performance was improved;At the same time due to key in the receiver module uses the parametric design,which makes the system has great flexibility.