摘要
基于Keystone变换技术研究正交频分复用(Orthogonal frequency division multiplexing,OFDM)雷达信号距离单元走动校正方法。在研究OFDM雷达信号数学原理的基础上,本文给出了理想点目标的脉冲串回波信号表达式。针对发射信号内在结构特性,分析了相对运动对目标回波信号的影响。推导了脉冲体制OFDM回波信号的距离频率域模型,讨论了基于Keystone变换的距离走动校正技术。最后给出典型系统参数下的仿真实验结果,验证了方法的有效性。
Keystone transform is introduced to address the problem of range walk correction of pulsed OFDM radar signals. The echo signal model is proposed based on the mathematical principle of OFDM signals. Doppler effects are studied with respect to the structure of the transmitting signals. Pulse-train echo model is derived in range frequency domain, and Key- stone transform is discussed for range walk correction. Simulation results with typical system parameters are presented and the feasibility of the proposed model is revealed, which are of great importance for OFDM signals in applications, such as pulse-Doppler and airborne radar systems.
出处
《数据采集与处理》
CSCD
北大核心
2013年第4期421-424,共4页
Journal of Data Acquisition and Processing
基金
部预研基金(9140A07010311BQ02)资助项目
高等学校博士学科点专项科研基金(20113219110018)资助项目
