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.