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.
关键词
无人船/雷达通信一体化/无线光通信/OFDM-LFM
Key words
unmanned ship/lidar communication integration/optical wireless communication/OFDM-LFM
维普
万方数据