摘要
在超高速偏振态复用的正交相移键控(PM-QPSK)相干光通信系统中,相干接收机数字信号处理(DSP)解调技术对光纤色散、激光器频偏和随机相位噪声的线性补偿具有较复杂的相互影响作用,有必要研究系统对这3种噪声提出的边界补偿要求。以通用恒模算法(CMA)为基础,分别探讨在标准的EVM/BER要求下,色散补偿、载波频偏补偿和载波相位补偿的边界值,即上述3种噪声对CMA解调性能的影响。研究结果表明:光纤残余色散、激光器残余频偏和相位噪声以及光纤长度和跨度均具有一定边界值。
In ultra-high-speed polarization multiplexing-quadrature phase shift keying(PM-QPSK) coherent optical telecommunication systems, the compensations of fiber dispersion and laser frequency deviation and phsenoise in the coherent receiver DSP de-modulation techniques, have important influences to each other. So it is necessary to analyze boundary compensation requirement of the three kinds of noise. In order to assure EVM and BER standard requirement, the compensation boundary values of dispersion compensation, frequency deviation compensation and phase noise compensation are analyzed in this paper, based on the conventional constant modulus algorithm (CMA), that is the impact of the three noises above on CMA. The results show that, the dispersion, frequency deviation, phase noise, fiber length and span, all have their certain boundary values.
作者
钟昆
杨怀栋
ZHONG Kun;YANG Huaidong(State Key Laboratory of PrecisionMeasurement Technology and Instruments,Department of Precision Instrument, Tsinghua University, Beijing 100084, China)
出处
《光通信技术》
北大核心
2019年第4期1-7,共7页
Optical Communication Technology
基金
国家重大科学仪器设备开发专项(2014YQ510403)资助
关键词
光纤通信
偏振复用
相干解调
恒模算法
误码率
fiber communication
polarization multiplexing
coherent demodulation
constant modulus algorithm
bit error ratio
