雷达中频信号数字化研究及实现  

A Research and Implementation of Radar Intermediate Frequency Signal Digitization

作　　者：马玲[1] 吴莉[1] 

机构地区：[1]华中科技大学武昌分校信息科学与技术系,湖北省武汉市430064

出　　处：《信息化研究》2010年第2期35-37,共3页INFORMATIZATION RESEARCH

摘　　要：文中结合雷达中频信号数字化课题的具体要求,在讨论数字中频的理论算法和工程实现方案的基础上,设计了基于软件无线电思想的雷达中频数字化硬件平台。针对软件无线电的中频数字化技术进行探讨,深入研究了有关信号采样和数字正交的理论,探讨了实现数字正交采样相干检波的高精度算法,设计了基于软件无线电思想的中频数字化硬件系统,主要包括信号采集电路设计、中频数字化电路设计、逻辑控制电路设计和系统自检电路设计四个部分。此外,本方案还可在无雷达回波数据的情况下进行系统自检,大大提高了系统的可调试性和可靠性。This paper takes into account the specific requirements of the digitized radar IF signal, and constructs a general-purpose radar IF digitization hardware platform based on engineering concept and algorithms and digital IF implementations. This paper analyzes in depth the SWR IF digitization technology, thoroughly explores high-precision algorithms of digital quadrature sampling and coherent detection and designs an IF digitization hardware system based on SWR idea, which mainly includes four aspects of circuit design as follows： signal sampling circuit, IF digitization circuit, logic control circuit and system self-checking circuit. In addition, this scheme could execute self-checking without radar echo data which greatly enhances the system debugging and reliability.

关 键 词：中频数字化 数字下变频 正交采样 相干检波 

分 类 号：TN95[电子电信—信号与信息处理]