OFDM—MIMO相控阵雷达性能分析

采用正交频分调制（0FDM）波形的MIM0相控阵雷达是一种新的MIMO雷达，其可同时实现波形分集和频率分集．与正交相位编码波形不同，OFDM波形中心频率不同，存在特定的差频，使得基于该波形的MIMO雷达信号处理更为复杂．针对这一问题，首先建立了该雷达系统信号模型，推导了子阵间空域相干合成结果，然后，分析了该系统的信噪比、作用距离和抗截获能力，并与传统相控阵雷达进行了比较理论分析和仿真实验结果证实了该系统的优势．

Performance Analysis of OFDM-MIMO Phased Array Radar

MIMO phased array radar using the OFDM waveforms is a new kind of MIMO radar, which can achieve the waveform diversity and frequency diversity simultaneously. Howeve, differing from the orthogonal phase-coding waveforms, OFDM signals have a different centre frequency and occur a specific beat frequency, thus resulting in the processing of the OFDM waveforms-based MIMO radar signals being more complicated. To solve this problem, at first, this paper sets up a model for this radar system and derives the coherent combination results of space domain between sub-arrays, and then, analyzes the SNR, operating range and anti-interception performances of the system, and compares them with those of conventional phased-array radar. Theoretical analysis and simulation experiment prove this proposed new svstem to be of advantages.