Research On Radar And Communication Integration Technology Based On 5G Signal

In the use of 4G signals based on Orthogonal Frequency Division Multiplexing(OFDM),there exists many deficiencies,such as high out-of-band emissions(OOBE),low frequency utilization and excessively stringent communication synchronization requirements.In order to accommodate a more abundant business scenario,the communication waveform needs to be able to dynamically select and configure waveform parameters according to the scenario.Therefore,F-OFDM(Subband Filtere-OFDM)becomes the next generation 5G signal modulation scheme.At the same time,in radar system,OFDM radar signals have the advantages of multi-carriers,orthogonality between subcarriers,and diversity of encoding methods.In theory,F-OFDM is a waveform suitable for radar and communication integration applications.Based on the above research background,this paper systematically discusses the principle of OFDM,sets up the OFDM signal model,analyzes the OFDM signal processing process,and focuses on the analysis of the orthogonality between carriers and the use of cyclic prefix in signal processing;and studies communication performance and radar detection performance of F-OFDM signals,the filter design and frequency domain filtering method,as well as channel equalization and ICI cancellation algorithm are deduced.The signal characteristics and communication performance of F-OFDM are simulated and analyzed;the principle of target detection is discussed in detail,the characterization function of the ambiguity function on the spatial resolution is discussed,the detection capability of the F-OFDM signal is also simulated and analyzed.This verifies the feasibility of using F-OFDM signal as a radar and communication integrated signal,and lays a foundation for more effective fusion application of radar detection and communication functions of 5G signal.