一种数字宽带截获接收机的高效实现  

An Efficient Implementation of Digital Wideband Intercept Receiver

作　　者：韩煜[1,2] 赵艳[1,2] 张东坡[1,2] 

机构地区：[1]通信系统信息控制技术国家级重点实验室,浙江嘉兴314033 [2]中国电子科技集团公司第三十六研究所,浙江嘉兴314033

出　　处：《通信对抗》2010年第1期51-54,共4页Communication Countermeasures

摘　　要：针对高密度复杂信号环境下的雷达信号截获问题，研究并实现了一种数字宽带实时接收方法。该方法工作在超外差体制下，在宽带中频数字化信号后，利用多相滤波器进行高效信道化，并对各子信道参数测量，然后通过简单的检测和判决逻辑实现多路信号截获。在MATLAB和FPGA上，对500MHz宽带信号进行了8路信道化接收、参数测量、检测判决实现。仿真和硬件实现结果均表明，在一定的信噪比和信号频率间隔下，实现的接收机能够对多个同时到达信号进行实时侦察与测向。This paper introduces a digital wideband real-time receiving technology to intercept radar signal and communication signal in a high density emitter environment. The proposed method adopts a bandpass sampling to an intermediate frequency （IF） wideband signal under a heterodyne system. A polyphase filter can perform the wideband channelization for intercepted signals. Then each sub-channel respectively provides parameter measurements, signal detection and simple arbitration for simultaneous signals. We implemented an 8-channel architecture for a 500MHz signal bandwidth in MATLAB and FPGA. The simulation and hardware implementation results both show that the proposed wideband receiver can intercept simultaneous signals real-time and efficiently under certain signal noise ratio （SNR） and frequency interval.

关 键 词：截获接收机 多相滤波器 数字瞬时频率测量(DIFM) 电路实现 

分 类 号：TN971[电子电信—信号与信息处理]