岸-舰多基地地波超视距雷达的发射波形及其解调  

Design of transmitting waveforms and its demodulation in the coast-ship multi-static ground wave over-the-horizon radar

作　　者：陈伯孝[1] 孟佳美[1] 张守宏[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2005年第1期7-11,共5页Journal of Xidian University

基　　金：国家部委预研资助项目(40106020203)

摘　　要：根据岸 舰多基地地波超视距雷达的发射站采用多个发射天线,同时辐射不同载频信号,并实现"广播"发射的要求,提出了该雷达工作波形参数的设计原则,研究了调频中断连续波(FMICW)在该雷达中的应用,定量分析了有关参数的选取与距离分辨率、最大不模糊距离、跨多普勒单元等之间的关系.由于接收站安装在舰船上,不能直接得到发射样本,故不能采用传统模拟混频的方法进行解调,研究了在接收站对发射波形的全数字化的解调方法,计算机模拟结果表明所设计的工作波形的可行性和有效性.For the coast-ship multi-static ground wave over-the-horizon radar, multiple carrier-frequency signals are radiated simultaneously with multiple antennas in its transmitting station, and a broadcasting transmitting way is formed. The principles for the design of its transmitting waveforms are presented. Frequency modulated interrupt continuous wave (FMICW) waveforms are adopted in this radar. The relationships of waveform parameters with range resolution, maximum unambiguous range, Dopple walk, and so on are discussed. The receiver station is on the ship and samples of transmitted waveforms cannot be received directly, so the conventional analog mixer cannot be used and the method of full digital demodulation of transmitted waveforms in the receiver station is presented. Simulation results show that the waveforms designed are effective.

关 键 词：地波 超视距雷达 多基地雷达 调频中断连续波 波形设计 数字解调 

分 类 号：TN958[电子电信—信号与信息处理]