Doppler Compensation of Triangular Wave for OFDM Communication Integration in Low Speed Scenario

With the rapid development of radar and communication industry, radar communication integration system based on OFDM system is emerging in many fields. The current research focuses on the accuracy of communication transmission, radar signal design and processing. In this paper, an integrated OFDM radar communication system based on symmetrical triangulation velocity measurement is proposed to solve the problems related to the communication subsystem. In the low-speed scenario of ground to air mode, the system can achieve high resolution by transmitting triangular wave signals and OFDM signals with large bandwidth at intervals. This paper attempts to analyze the sensitivity of OFDM signal to doppler frequency and the accuracy of symmetrical triangular wave velocity measurement, and uses the results of triangular wave velocity measurement to calibrate the OFDM signal, so as to reduce the bit error rate of communication subsystem.