| 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。 |
| 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 |
| DOI： |
|
| 基金项目: |
|
| Digital quadrature sampling of IF signal and its FPGA implementation |
| ZHANG Bi-feng,GUO Ying |
| (Institute of Telecommunication Engineering,Air Force Engineering
University,Xi′an 710077,China) |
| Abstract: |
| To satisfy the requirement of high performance signal processing technique, it i
s necessary to use the direct sampling of IF(Intermediate Frequency) signal to o
btain quadrature signals. This paper
analyses the principle of the quadrature sampling of IF signal,presents the meth
od to design the filter and its FPGA implementation,and finally,validates the ef
fectiveless of this method through a simulation.Theorectical analysis and simul
ation result demonstrate that the requirement of
high performance signal processing technique can be completely
satisfied with this methods. |
| Key words: signal processing digital IF quadrature sampling LPF coherent detector FPGA implementation |
《电讯技术》编辑部 