半导体光电, 2020, 41 (6): 902, 网络出版: 2021-01-22
基于相位调制的大动态微波光子链路仿真研究
Simulation of Largedynamic Microwave Photonic Link Based on Phase Modulation
微波光子 相位调制 光锁相环 大动态范围 雷达系统 microwave photonics phase modulation optical phase locked loop large dynamic range radar system
摘要
针对相位调制微波光链路线性解调困难的问题,开展了基于锁相环高线性相位解调方法的理论研究。建立了详细的链路模型,充分考虑噪声和非线性畸变的影响,推导得到了链路关键参数的变化趋势。同时结合实际链路器件参数,完成了链路关键参数的仿真研究。结果显示,基于锁相环,在200MHz的射频频率下,链路动态范围可达到127dB·Hz2/3,较传统强度调制方法提升近20dB,为大动态微波光子链路实验应用提供了一定的理论参考。
Abstract
In order to solve the problem of linear demodulation for phasemodulated microwave photonic link, a theoretical study of highlinear phase demodulation with optical phaselocked loop (OPLL) is carried out. A detailed link model is established, and taking full account of the influence of noise and nonlinear distortion, the variation trend of key parameters of the link was derived. And also, the key parameters of the link were simulated based on the parameters of actual link devices. Simulation results show that based on the OPLL, the dynamic range of the link can reach 127dB·Hz2/3 at 200MHz RF, which is nearly 20dB higher than that obtained by the traditional intensity modulation method, providing a reference for applications of largedynamic microwave photonic link.
王超, 庾财斌, 肖永川, 张羽, 瞿鹏飞, 李儒章, 孙力军. 基于相位调制的大动态微波光子链路仿真研究[J]. 半导体光电, 2020, 41(6): 902. WANG Chao, YU Caibin, XIAO Yongchuan, ZHANG Yu, QU Pengfei, LI Ruzhang, SUN Lijun. Simulation of Largedynamic Microwave Photonic Link Based on Phase Modulation[J]. Semiconductor Optoelectronics, 2020, 41(6): 902.