Research On Radar Communication Signal Integration And Beamforming

In the current combat platform,radar and communication equipment operate independently of each other.With the development of wireless communication technology and the upgrading of hardware platform,people begin to pay attention to the problem that radar and communication equipment are independent of each other and occupy a large amount of space on the current combat platform.At the same time,because of the overlap between radar and communication band,the electromagnetic interference problem seriously affects the overall performance of each system.At present,by comparing and analyzing the similarity and feasibility of the hardware system of radar and communication system,it is the key of the integrated design of radar communication to realize the intercommunication of software level in the way of signal sharing at the signal processing level,which not only reduces the use volume of multiple sets of equipment,but also reduces the problems of electromagnetic interference and limited spectrum resources.Focusing on the topic of integrated signal and system research,this paper mainly discusses the following aspects.Firstly,it analyzes each system of radar and communication system,analyzes their respective characteristics and overlaps,and studies the development status of integrated signal at home and abroad.According to the development trend and performance analysis of integrated signal,BPSK-LFM signal is selected as the integrated signal And through the OFDM Technology in the communication system,the performance of the communication system is improved.Based on the performance of radar and communication system,the integrated mode is evaluated,and phase coded P4 code is introduced to replace the original signal to optimize the integrated signal.The fuzzy function and error rate of the optimized scheme are analyzed.Secondly,by beamforming the integrated signal,the scheme of beamforming for the integrated communication system of wideband OFDM radar is discussed.The beamforming schemes of Pre-FFT,Post-FFT and adaptive algorithm are given respectively.The received signal of the integrated signal is beamforming simulated,and the problems of Dopplerfrequency shift and multipath in the actual use of the integrated signal are discussed Through the simulation analysis,the influence of the integrated system parameters on the radar performance and communication performance is analyzed,which provides a reference for the design of the integrated system with different schemes according to different requirements.Finally,through the FPGA synthesis simulation and system analysis of the integrated signal,the integrated radar communication system is realized,which is of great significance for the research of the integrated radar communication system.