基于10Gbit/s-PON接收机25Gbit/s双二进制检测传输性能

25 Gbit/s transmission performance using duo-binary detection with 10 Gbit/s-PON receiver

IEEE已经成立了100 Gbit/s以太无源光网络(100 Gbit/s-EPON)任务组研究下一代100 Gbit/s PON标准,双二进制检测技术是基带技术选择之一。对基于10 Gbit/s-PON接收机的25 Gbit/s双二进制(DB)检测传输性能进行了实验验证。由于10 Gbit/s-PON接收机带宽受限明显,10 Gbit/s-PON接收机输出的25 Gbit/s双二进制信号会受到码间干扰(ISI)影响。实验结果表明,基于直接判决法的系统接收灵敏度只有-22 dBm,采用最简最大似然序列估计(MLSE)软判决法的系统接收灵敏度能提升到-24.5 dBm。

IEEE has formed the 100 Gbit/s-EPON Task Force to develop next 100 Gbit/s-PON standards, and the duo-binary（DB） detection is one of the baseband technology options. 25 Gbit/s DB detection transmission performance with 10 Gbit/s-PON receiver was been experimentally demonstrated. Because the bandwidth of 10 Gbit/s- PON receiver is obviously limited, the 25 Gbit/s DB output signal from 10 Gbit/s-PON receiver will be affected by the inter-symbol interference（ISI）. The experiment results show that the system receiving sensitivity based on direct decision method is only -22 dBm. However, the system receiving sensitivity can be up to -24.5 dBm by using the most simplified maximum likelihood sequence estimation（MLSE） soft decision method.