一种集成接收机的信号处理方法  

Signal processing method for an integrated receiver

作　　者：王乾名 林琮凯 朱硕隆 曲勃源 郑嘉利[1] 张振荣[1] WANG Qianming;LIN Congkai;ZHU Shuolong;QU Boyuan;ZHENG Jiali;ZHANG Zhenrong(School of Computer and Electronic Information,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学计算机与电子信息学院,南宁530004

出　　处：《光通信技术》2023年第4期32-37,共6页Optical Communication Technology

基　　金：粤桂联合基金项目(2021GXNSFDA076001)资助。

摘　　要：针对在光接入网中传统相干接收机存在成本高、算法处理复杂的问题,提出一种低成本的简化相干接收机(SCR)信号处理方法。发送端使用四电平脉冲幅度调制(PAM4)高阶码型进行信号调制,接收端对输出信号先后采用不平衡度补偿算法、反馈式全数字时钟恢复算法进行处理,并通过帧同步、码元判决后计算误码率。仿真及实验结果表明:所提方法在系统中有着良好性能,在输入信号光功率为-9 dBm时,系统误码率为10^(-4)量级,低于硬判决前向纠错(HD-FEC)门限的误码率判决。Aiming at the problems of high cost and complex algorithm of conventional coherent receiver in optical access network,a low cost simplified coherent receiver(SCR)signal processing method is proposed.The transmitter uses four-level pulse amplitude modulation(PAM4)high order code to modulate the signal,and the receiver uses unbalance compensation algorithm and feedback full digital clock recovery algorithm to process the output signal,and calculates the bit error rate through frame synchronization and code element decision.The simulation and experimental results show that the proposed method has good performance in the system.When the optical power of the input signal is-9 dBm,the bit error rate of the system is 10^(-4),which is lower than the bit error rate decision of the hard decision forward error correction(HD-FEC)threshold.

关 键 词：简化相干接收机 四电平脉冲幅度调制 信号处理 不平衡度补偿算法 时钟恢复算法 

分 类 号：TN914[电子电信—通信与信息系统]