OFDM传输体制的MIMO雷达自通信系统研究

项目名称： OFDM传输体制的MIMO雷达自通信系统研究

项目编号： No.61201217

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 徐任晖

作者单位： 中国人民解放军理工大学

项目金额： 25万元

中文摘要： 机载或舰载雷达之间的无线通信是实现雷达数据融合的必要条件。由于雷达系统和通信系统在系统结构上的相似性，借助雷达系统的硬件平台实现雷达之间直接的无线通信，对于雷达组网应用有重要的理论价值和实践意义。共址相干MIMO雷达具备较强的目标辨识能力和灵活的发射波束成形能力，采用OFDM波形后能在时间维和频率维获得自由度。在考虑MIMO雷达的每天线发射功率控制、天线选择的基础上，综合发射天线相关性、接收天线相关性和多径相关性，分析基于OFDM的MIMO雷达自通信系统的信道容量。针对OFDM信号峰均功率比过高、对频偏敏感、功率谱旁瓣过大等不利因素，研究采用发射端预处理的方法进行抑制，优化设计OFDM雷达波形。对于多个基于OFDM的MIMO雷达自通信系统组成的Ad hoc网络，研究跨层协议设计方法实现全网信息共享。通过对雷达自通信系统、波形、组网领域的理论研究为进一步拓展雷达功能奠定基础。

中文关键词： 多输入多输出雷达；正交频分复用；雷达自通信；无线自组织网；

英文摘要： Wireless communication among the shipboard radars or aiborne radars is requisite for data fusion. Similarity on the system diagram between the radar system and communication system makes it possible to design the self communication system on the basis of the radar system. This is significant for the netted radar application. The waveform diversity enables the MIMO radar superiority in several functional domain. Firstly, the parameter identifiability is improved. Secondly, it achieves the similar goal as the adaptive arrays for target detection and parameter estimation. Thirdly, the transmitting beampattern design is flexible for MIMO radar. On the other hand, OFDM-coded radar signals are comparable with linear frequency modulation (LFM) signals and furthermore, experiences no range-Doppler coupling. It should be possible, with appropriate waveform design and signal processing, to achieve both radar and communications capability using a single OFDM waveform in MIMO radar system. Per transmiting antenna power control and the antenna selection help the MIMO radar to improve the capability and limit the communication capability. Under this condition, the MIMO channel capacity is studied with the correlation between the transmiting antennas, the correlation between the receiving antennas and the multipath correlation

英文关键词： MIMO Radar；OFDM；radar self-communication；wireless ad hoc network；