多相滤波的数字相干检波原理及FPGA实现  

Principles of Polyphase Filtering for Digital Quadrature Detection and its Realization on FPGA

作　　者：何光明[1] 黄云[1] 

机构地区：[1]中国电子科技集团公司第20研究所综合计划部,陕西西安710068

出　　处：《电子科技》2010年第8期58-61,共4页Electronic Science and Technology

摘　　要：多相滤波是实现数字下变频及数字相干检波的关键技术,是雷达、声纳和通信等系统中为数字信号处理提供高质量的正交信号的有效手段。文中讨论了多相滤波的基本原理,给出了采用多相滤波的方法对中频带限信号处理的仿真分析,并结合一款脉冲压缩雷达中频数字化接收机的实现方案进行工程验证,结果表明,在技术指标上可有效克服正交通道不一致问题,具有较高的应用价值。Pholyphase filtering is one of the key technology to implement digital down conversion and quadrature coherent detection,which can provide high fidelity quadrature signal for digital signal processing of radar,sonar,communication and other systems.The basic principles of polyphase filtering are discussed.The results of computer simulation of Band-Limited IF signal processing based on polyphase filtering is given.It is validated by the implementation project of wideband digitized receiver on pulse compression radar.

关 键 词：数字正交变换 多相滤波 镜频抑制 

分 类 号：TN713[电子电信—电路与系统]