中文摘要：

多输入多输出（MIMO）雷达是最近提出的新的雷达技术，在发射端全向发射正交信号，在接收端对接收信号进行匹配滤波处理来恢复发射信号分量，因而信号的正交性好坏是MIMO雷达实现的关键。该文分析了正交频分线性调频（OFD-LFM）信号的互模糊函数，对互相关峰值旁瓣电平出现的位置及幅度大小进行了分析，给出了最小化OFD-LFM信号间互相关影响的参数之间的关系。通过对信号互相关的仿真结果及对目标回波信号匹配滤波的仿真结果，证明了理论分析的正确性。

英文摘要：

Multi-input multi-output （MIMO） radar is a new radar technique developed recently. On transmitting, each channel radiates a unique and orthogonally coded waveform. On receiving, the return signals are processed through a bank of matched filters to separate each transmitted signal. Hence, the orthogonal performance between signals is crucial for implementing MIMO radar system. In this paper, the cross-ambiguity of OFD-LFM （orthogonal frequency division linear frequency modulation）signals is analyzed. The location and level of the cross-correlation peaks are investigated. The relation between the parameters that minimize the cross-correlation peaks of MIMO signals is derived. The simulation validates the correctness of the proposed theoretical analysis.