基于窗函数的非线性调频信号的设计和性能分析  

Design of NLFM Signal Based on Window Functions and Analysis of Its Performance

作　　者：刘春冉[1] 陈伯孝[1] 李锋林[1] 

机构地区：[1]西安电子科技大学,西安710071

出　　处：《火控雷达技术》2007年第3期78-83,共6页Fire Control Radar Technology

摘　　要：非线性调频(NLFM)信号的脉压结果具有低旁瓣和高距离分辨力的良好特性,本文根据相位逗留原理利用窗函数或窗函数的组合设计各种NLFM信号的产生方法,并通过直接数字频率合成器(DDS)实现100MHz以下时宽、带宽、幅度可灵活控制的NLFM信号的产生。然后对实际信号进行数据采集和信号处理,分析它的各个性能指标以及讨论信号的优化问题。The pulse-compressed non-linear frequency modulation （NLFM） signal has merits of low sidelobe and high range resolution. Window function or its combination is used in this paper to design generation of various NLFM signals based on phase stationary theory. Direct digital synthesizer （DDS） is used to generate NLFM signals under 100MHz whose time width, bandwidth and amplitude can be controlled flexibly. The generated signals are sampled and processed to analyze the technical specifications; finally the optimization of the NLFM signal performance is discussed.

关 键 词：非线性调频信号 直接数字频率合成 窗函数 

分 类 号：TN911.7[电子电信—通信与信息系统]