Analysis of integrated signal performance of OFDM-LFM lidar communication for unmanned ships
The integration of optical wireless communication(OWC)and lidar is proposed in this study to enhance the safety,radar target detection accuracy,and communication efficiency of unmanned ships.The orthogonal frequency division multiplexing-linear frequency modulation(OFDM-LFM)system is utilized for this purpose.In order to examine absorption,scattering,and the impact of water surface fluctuations on optical signals,the optical characteristics of the water surface are modeled using the Beer-Lambert law,Rayleigh scattering,and the Fresnel formula.The bit error rate(BER)performance of the integrated system is analyzed under four modulation schemes:16-quadrature amplitude modulation(16QAM),quadrat-ure phase shift keying(QPSK),binary phase shift keying(BPSK),and minimum shift keying(MSK).Pulse compression technology is introduced in this study to enhance distance resolution while maintaining a radar velocity resolution for the in-tegrated system.Simulation results indicate that optimal performance is achieved by employing BPSK modulation with a BER below 10-5 at a signal-to-noise ratio of 8 dB.The performance achieved by employing BPSK modulation surpasses tra-ditional continuous phase modulation(CPM)modulation in OFDM-LFM systems by 3.5 dB.After pulse compression pro-cessing,the integrated signal system exhibits superior distance resolution of 5.9 m and velocity resolution of 2.04081 m/s.
unmanned shiplidar communication integrationoptical wireless communicationOFDM-LFM
万方数据
维普
