中文摘要：

OFDM-MIMO相控阵雷达采用的发射信号具有频率分集特性，通过带宽合成方法可将发射的窄带信号获得的回波合成为大的带宽信号，能显著提高雷达的距离分辨力。基于所建立的OFDM-MIMO相控阵雷达回波模型，分别讨论了时域和频域带宽合成处理方法，推导出了其所需要的相位补偿因子的理论表达式，并通过仿真实验对提出方法的有效性进行了验证。

英文摘要：

As the transmitted signals used in the OFDM-MIMO phased array radar are of frequency diversity, the echo signals from the transmitted narrow-band signals can be synthesized as wide bandwidth ones, which can improve the radar’s range resolution greatly. Based on the echo model established for the OFDM-MIMO phased array radar, this paper studies the processing methods for bandwidth synthesis respectively in time domain and frequency domain, derives the theoretical expression required for its phase compensation factor and verifies the effectiveness of the proposed method by simulation experiments.