摘要
为了解决正交频分复用(Orthogonal frequency division multiplexing,OFDM)信号雷达波形设计的问题,推导了OFDM雷达信号的单周期模糊函数,给出了单周期模糊函数与调制码字序列的关系。讨论了多周期模糊函数,分析了其旁瓣特性,提出一种抑制OFDM信号雷达多普勒旁瓣的相参脉冲串处理方法。以Barker码作为调制码字序列,给出了仿真结果。与传统方法相比,该文的方法不需要对已调制信号进行计算,而直接由调制码字序列得到OFDM雷达信号的周期模糊特性。
To address the problem of waveform design,the periodic ambiguity function of orthogonal frequency division multiplexing（OFDM） radar signals is derived and its relationship with the modulating sequences is indicated.Multiple-period ambiguity function is further studied and the characteristics of the side-lobe are analyzed.A corresponding coherent pulse train processing method is proposed to reduce the Doppler side-lobe.Simulation results of Barker codes modulated OFDM radar signal are presented.This approach requires no direct computation of the modulated signals and the ambiguity is derived from the modulating sequence.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2011年第4期513-518,共6页
Journal of Nanjing University of Science and Technology
基金
部预研基金(9140A07010311BQ02)
南京理工大学自主科研专项计划资助项目(2010ZDJH05)
深圳大学ATR重点实验室
关键词
雷达信号分析
正交频分复用
模糊函数
radar signal analysis
orthogonal frequency division multiplexing
ambiguity function
