一种载边比可调单边带全双工光载无线系统

理论分析了一种基于双平行马赫曾德尔调制器(MZM)的2倍频光单边带调制方案,仿真研究了基于该方案的载波重用全双工光载无线(RoF)通信系统性能.合理设置射频驱动信号相移及双平行MZM主调制器偏置电压产生单边带信号,再调整调制指数以实现光载边比ROCS的连续可调谐.讨论了射频信号相移、主调制器偏置电压、双平行MZM消光比...

Optical Single Sideband Full-Duplex RoF System with ContinuouslyTunable Optical Carrier-to-Sideband Ratio

A novel doubling frequency modulation scheme of optical single sideband based on dual-parallel Mach-Zehndermodulator (MZM) is analyzed theoretically, and the performance of carrier reuse full-duplex radio over fiber (RoF)system based on this scheme is simulated. By setting the phase shift of radio frequency (RF) driving signal and the bias voltageof dual-parallel MZM main modulator, the optical single sideband signal is generated, and then the modulation index isadjusted to realize the continuous tunability of optical carrier-to-sideband ratio (ROCS). The effects of RF signal phase shift,main modulator bias voltage, dual-parallel MZM extinction ratio (RE) and modulation index on ROCS are discussed, and thetheoretical analysis results are consistent with that of simulations. The results show that the power penalties are 2. 5 dB and3. 4 dB for ROCS =0 dB and ROCS =10. 33 dB at BER =10-9, respectively, and the receiver sensitivity is increased by 2. 6 dBwhen ROCS is reduced from 10. 33 dB to 0 dB.