基于动态优化的非线性调频信号设计  

Design of NLFM Signal Based on Dynamic Optimization

作　　者：肖开健[1] 井伟[1] 肖战牛[1] 

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2011年第2期35-37,共3页Fire Control Radar Technology

摘　　要：由于非线性调频信号(NLFM)无需加权就可获得很高的主副瓣比,没有加权失配所引起的信噪比损失,在雷达系统中,得到广泛的应用。本文采用改进的动态优化法对某雷达大时宽、小压缩比、高多普勒频率非线性调频信号进行优化设计。获得高的主副瓣比、小的主瓣展宽系数和宽的多普勒容限,改善了脉压的性能。Since a nonlinear frequency modulation （NLFM） signal can be used to obtain very high main lobe to side lobe ratio without weighting, ar,d no signal to noise ratio loss caused by weighting mismatch, therefore it is widely used in radar systems. This paper employs the improved dynamic optimizing method to carry out optimum designing large time duration - bandwidth, small compression ratio and high Doppler frequency NLFM signal for a radar so as to get a signal with high mainlobe to sidelobe ratio, small mainlobe width extension coefficient and large Doppler tolerance, and improve the pulse compression performance.

关 键 词：NLFM 多普勒频率 小压缩比 主副瓣比 

分 类 号：TN911.7[电子电信—通信与信息系统]