Design And Verification Platform Development Of Time Division Radar And Communication Integrated System Based On 5G Communication Signal

While the single vehicle sensor system can not guarantee the safety of multi vehicle cooperative network automatic driving scene,the perceptual information sharing between autonomous vehicles is the key to realize advanced automatic driving.However,due to the shortage of spectrum resources in the medium and low frequency band and the independence of sensor systems,the timeliness of transmitting sensing information between vehicles is difficult to guarantee.In order to save and make efficient use of spectrum resources,support the requirements of low delay,high speed and high reliability transmission for sensing information sharing in multi vehicle network automatic driving scene,and solve the problem of sensing and communication performance balance under resource constraints,this thesis mainly studies the design of integrated sensing and communication waveform and the implementation of system sensing algorithm based on 5G communication frame structure in 28 GHz millimeter wave band.A 5G integrated sensing and communication software and hardware verification platform based on millimeter wave broadband communication is developed to verify the feasibility of the proposed integrated sensing and communication waveform and sensing algorithm.The contributions of this thesis are mainly reflected in three aspects:(1)the integrated sensing and communication frame structure design and waveform implementation method using 5G new radio communication frame structure are proposed,the algorithm design scheme of realizing integrated sensing and communication waveform using PSS symbol,DMRS symbol and PDSCH symbol is proposed,and the numerical simulation analysis is carried out,It is verified that the three communication symbols can ensure the communication transmission rate of 2.8 Gbps and the perceived data refresh rate of 5 kHz at the same time.(2)The sensing and detection functions of ranging,velocity measurement and angle measurement of integrated sensing and communication signal based on 5G communication signal are proposed.Through system level simulation,the sensing performance of distance resolution≤0.488m,velocity resolution 0.162 m/s and angle resolution 10° is obtained.(3)The hardware verification platform of integrated sensing and communication in 28 GHz millimeter wave band is designed and built.The practical test preliminarily verifies the feasibility of the proposed integrated sensing and communication technology.While ensuring the communication performance of 2.8 Gbps communication transmission rate,the sensing performance with ranging resolution of 0.488m,perceptual data refresh rate of 100Hz and angle measurement resolution of 10° is obtained.Finally,the research content of this thesis is summarized,and the algorithm and platform optimization design of integrated sensing and communication system based on 5G NR frame structure are prospected.