FSK-FMCW雷达通信一体化信号设计与处理方法研究

在未来的智能交通系统中，车载雷达通信一体化信号可使智能车辆同时完成雷达探测和通信信息传输功能，然而现有的基于调频连续波（Frequency Modulated Continuous Wave,FMCW）的车载雷达通信一体化信号的通信数据率较低，难以满足未来智能交通的需求。为了提高雷达通信一体化系统的通信数据率，本文提出了一种频移键控（Frequency-Shift Keying,FSK）FMCW雷达通信一体化信号设计方法，该方法通过在每个线性调频（Linear Frequency Modulation,LFM）信号上调制多个通信符号，以提高一体化信号的通信数据率。此外，在雷达接收端，将差拍处理和二维快速傅里叶变换（Fast Fourier Transformation,FFT）相结合，对接收到的目标回波进行处理，以获取目标的距离与速度估计。在通信接收端，通过差拍和一维FFT处理，对接收到的FSK-FMCW雷达通信一体化信号进行通信信息解调。最后，通过仿真实验验证了所提方法的有效性。

Integrated FSK-FMCW Radar and Communication Signal Design and Processing Method

? ?In the future， the intelligent transportation system will employ the integrated radar and communication signal to perform both radar target detection and communication information transformation functions at the same time. However， the present integrated radar and communication signal based on frequency modulated continuous wave （FMCW） for vehicular has low data rate， which cannot satisfy the requirements of intelligent transportation system in the future. In order to improve the data rate of the integrated radar and communication system， an integrated frequency shift keying （FSK） FMCW radar and communication signal design method is proposed. In this method， multiple communication symbols are modulated in each linear frequency modulation （LFM） signal to improve the communication data rate. Moreover， in the radar receiver， the beat processing and two-dimensional Fast Fourier Transformation （FFT） is combined， which is used to process the received echoes from the target. Then， the range and velocity estimations of the target are obtained. In the communication receiver， the communication information is demodulated from the received integrated FSK-FMCW radar and communication signal by beat processing one-dimensional FFT. Finally， the effectiveness of the proposed method is verified by numerical simulations.