FPGA Implementation Of Radar Communication Integration Based On LoRa Signal

With the continuous development of 5G technology,various electronic platforms have developed rapidly,and the number of electronic devices carried by wireless platforms has increased sharply.In this context,wireless spectrum resources are increasingly strained,and the mutual interference between electronic devices is also increasingly serious.In order to solve these problems,the future electronic equipment needs to seek the possibility of coexistence in the frequency band and sharing of hardware equipment.Therefore,the radar communication integration technology is gradually proposed and valued.Based on the different requirements of radar and communication and the complexity of signal processing,this paper proposes a radar communication integrated waveform based on LoRa signal.Starting from the integrated waveform design,and then according to the characteristics of the waveform,the radar receiving algorithm and communication receiving algorithm are designed,and the FPGA hardware implementation of the integrated scheme is given.The main contributions are as follows:(1)Combining LoRa modulation technology,complete the integrated waveform design based on pulse radar communication.By using LoRa modulated signals with low power consumption over long distances,as well as good noise resistance and Doppler tolerance,the in-pulse linear frequency modulation signal is replaced with LoRa signal,and its noise resistance,radar ranging,and other aspects are simulated and analyzed.(2)A signal processing scheme of radar communication integrated waveform based on LoRa modulation technology is proposed.According to the characteristics of LoRa signal,the radar pulse compression part is redesigned,and the pulse compression mode is adopted one by one,which largely counteracts the effect of intra-pulse LoRa modulation on radar pulse coherence.In the aspect of communication reception and processing,synchronization pulse and correction pulse are used to complete the acquisition and correction of communication signals,and the simulation results show that it still has good bit error performance.(3)Combined with FPGA board(VC707)and AD9361 to build a hardware platform,and complete the hardware implementation of radar communication integration algorithm.Firstly,the system generator development platform provided by Xilinx is used to complete the hardware design of integrated transmission algorithm,communication receiving algorithm and radar receiving algorithm;Then an integrated hardware platform is built with AD9361 and FPGA board(VC707);Finally,the designed System Generator module is imported into the Vivado development tool,and the FPGA implementation of the integrated algorithm is completed with AD9361.