数字中频正交采样及其FPGA实现  

Digital Quadrature Sampling of IF Signal and its FPGA Implementation

作　　者：张碧锋[1] 郭英[1] 

机构地区：[1]空军工程大学电讯工程学院,西安710077

出　　处：《电讯技术》2011年第2期46-51,共6页Telecommunication Engineering

摘　　要：为满足高性能信号处理的要求,需要直接对中频信号进行采样得到正交的两路信号。分析了直接中频正交采样的基本原理,给出了其中最重要的滤波器设计思想及其在FPGA上的硬件实现方法,并仿真验证该方法的有效性。理论分析和实验结果表明,这一方法可以满足高性能信号处理的要求。To satisfy the requirement of high performance signal processing technique, it is necessary to use the direct sampling of IF（Intermediate Frequency） signal to obtain quadrature signals. This paper analyses the prin- ciple of the quadrature sampling of IF signal, presents the method to design the filter and its FPGA implementa- tion, and finally, validates the effectiveless of this method through a simulation. Theorectical analysis and simulation result demonstrate that the requirement of high performance signal processing technique can be completely satisfied with this methods.

关 键 词：信号处理 数字中频 正交采样 低通滤波 相干检波 FPGA实现 

分 类 号：TN911.72[电子电信—通信与信息系统]