基于MIMO-OFDM的雷达通信一体化收发方法

MIMO-OFDM Based Dual-Function Radar-CommunicationTransmit-Receive Technique

摘要:

本文提出了一种基于MIMO-OFDM的雷达通信一体化共享信号收发方法，研究分析了MIMO-OFDM系统的信号模型以及在雷达通信一体化系统中通信信息调制在OFDM雷达信号上的处理方法。利用MIMO波束形成技术来实现雷达通信一体化信号的发射和接收处理，设计满足雷达目标探测方向和通信方向要求的发射方向图以实现雷达通信一体化信号的发射，同时接收波束形成分别在雷达目标方向和通信方向零陷从而获得通信信号和雷达回波，这样可以减轻其信号间干扰。数值仿真表明，所提出的雷达通信一体化共享信号收发方法可以提高一体化系统的通信性能，同时获得更精确的雷达目标参数。

Abstract:

This paper proposes a method of dual-function radar-communication sharing signal transmit-receive based on MIMO-OFDM (multiple input multiple output-orthogonal frequency division multiplexing). The signal model of MIMO-OFDM system and processing method of communication information modulation on OFDM radar signal in dual-function radar-communication system are analyzed. One can realize the transmitting and receiving of dual-function radar-communication signal by using MIMO beam-forming technique. The emission pattern which meets radar target detection and communication directions is designed to achieve the transmitting of dual-function radar-communication signal, and receiving beam-forming nulls in radar target direction and the communication direction to obtain communication signals and radar echo, since it can decrease mutual interference between the signals. Numerical simulations show that the proposed method of dual-function radar-communication sharing signal transmit-receive can improve the communication performance of the integrated system, and obtain more accurate radar target parameters.