数字合成孔径雷达接收机设计  

Design of Digital Synthetic Aperture Radar Receiver

作　　者：董骞[1] 张平[1] 

机构地区：[1]中国科学院电子学研究所

出　　处：《电子器件》2008年第2期572-575,共4页Chinese Journal of Electron Devices

摘　　要：为了解决模拟合成孔径雷达接收机带来的幅相不平衡等诸多问题,设计了一种基于高速A/D转换和FPGA高速信号处理的数字合成孔径雷达中频接收机。该设计结构简单、信号带宽大、镜频抑制比高。对多相滤波正交解调算法进行了改进,给出了数字中频接收机的工作原理和系统结构框图,设计了基于Virtex-4FPGA的信号处理模块。仿真验证结果表明该设计完全符合系统设计参数的要求,可以应用于高分辨率合成孔径雷达。There are many problems existing in analogue receiver of synthetic aperture radar （SAR） such as I/Q imbalance. A digital intermediate frequency （IF） receiver based on high speed A/D and FPGA is proposed, This digital receiver behaves as simple architecture, broadband signal and high image ratio characterization and improves the polyphase filtering method. The theory and block diagram of digital receiver are provided. The signal processing model design is based on Virtex-4 FPGA. Simulation results show the digital receiver conforms to the design specification and can be used in high resolution SAR.

关 键 词：合成孔径雷达 中频接收机 多相滤波法 高速信号处理 

分 类 号：TN957.52[电子电信—信号与信息处理] TN911.72[电子电信—信息与通信工程]