MIMO天波超视距雷达正交信号设计研究  

Study on Design of Orthogonal Signal for MIMO Over-the-horizon Radar

作　　者：牛志军[1] 裴炳南[1] 陈洁[1] 高晓兵[1] 

机构地区：[1]大连大学信息工程学院,辽宁大连116622

出　　处：《电视技术》2012年第1期98-100,125,共4页Video Engineering

基　　金：国家自然科学基金项目(60971107);辽宁省高校创新团队支持项目(LT2010004)

摘　　要：多输入多输出雷达(MIMO Radar)体制综合采用多通道、等效发射波束形成技术,为天波超视距雷达(OTHR)面临的杂波多普勒扩展提供了一条有效的解决途径。具有良好的自相关性能和低互相关电平的正交波形集是MIMO雷达体制应用的关键。从信号处理的角度出发,利用互模糊函数对正交频分线性调频信号(OFD-LFM)的互相关峰值幅度及位置进行了分析,给出了正交信号的设计规律,仿真实验验证了分析的正确性。Synthesizing the multiple-channel and non-causal transmit beamforming techniques, the multiple-input multiple-output radar architecture can provide a feasible approach for solving the Doppler-spread clutter in Over-the-horizon Radar（OTHR）. Orthogonal waveform set with good property of auto-correlation and low level of cross-correlation is crucial for MIMO radar architecture implementation. From the perspective of signal processing, based on cross-ambiguity function, the location and level of the cross-correlation peaks of orthogonal frequency division linear frequency modulation （OFD-LFM） signals are analyzed, then the design rule of orthogonal signal is presented. At last, the simulation results validate these anysics.

关 键 词：多输入多输出雷达 天波超视距雷达 正交频分线性调频信号 模糊函数 互相关 

分 类 号：TN911.72[电子电信—通信与信息系统]