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为了解决雷达通信一体化系统中的雷达信号与通信信号较难分离的问题,在正交频分复用(OFDM)雷达的基础上,提出了一种基于OFDM脉间随机步进频的雷达通信一体化信号模型,通过频率捷变将数据信息加载到雷达信号上,利用随机的步进频率传输数据,从而使一体化信号能同时实现雷达探测和数据通信功能,避免了信号分离。同时设计了雷达通信一体化方案,在雷达接收端,运用相关法实现一维距离成像;在通信接收端,通过带通滤波器组检测频率点解调数据。仿真实验结果表明,一体化信号能实现分米级的距离高分辨和速率为Mbit/s级的数据通信,能够满足大批量数据传输的要求。
In order to solve the problem that the radar signal and the communication signal are difficult to be separated in the integrated radar communication system, a radar communication based on the OFDM inter-pulse random step frequency is proposed on the basis of Orthogonal Frequency Division Multiplexing (OFDM) Integrated signal model, through the frequency agility data information is loaded to the radar signal, the use of random step frequency transmission of data, so that the integrated signal can simultaneously radar detection and data communications, to avoid signal separation. At the same time, a radar communication integration scheme is designed. At the receiving end of the radar, one-dimensional distance imaging is realized by using the correlation method. At the communication receiving end, the data is demodulated by detecting the frequency point through the band-pass filter bank. Simulation results show that the integrated signal can achieve high-resolution and Mbit / s data communication at decimeter level, which can meet the requirements of mass data transmission.