基于FPGA的数字中频接收机设计与实现

Design and Implementation of Digital IF Receiver Based on FPGA

近年来雷达行业提出了软件雷达的概念,数字技术在雷达中的广泛应用已成为一种必然趋势。现代雷达系统对接收机提出了更高的要求,数字接收机技术已成为实现高精度宽带雷达接收系统的一种有效途径。研究了数字接收机的相关理论和技术,介绍了数字下变频,数控振荡器、级联积分梳状滤波器和抽取。给出了一种基于FPGA的数字中频接收机实现方案,进行了分析和仿真,给出了测试结果。

The concept of software radar is proposed in recent years.The wide application of digital technology in radar has become a main trend.Higher performance is required in a receiver for modern radar system.Digital receiver technology has become an effective implementation method for high-accuracy and wide-band radar receiving systems.The theory and technology of digital receiver is discussed in this paper.The digital down conversion,NCO,CIC and decimation are described.An example for implementing a digital IF receiver based on FPGA is presented.The analysis and simulation is made and the test results are given.