正交频分复用无源光网络

[摘要] 认为当采用低频段的射频资源时，色散导致的双边带功率衰落对正交频分复用无源光网络（OFDM-PON）的影响很小。基于时分复用（TDM）架构的OFDM-PON，充分利用正交频分复用（OFDM）技术的优势与TDM架构的无色性，与现有的以太网无源光网络（EPON）、千兆比无源光网络（GPON）兼容性高，是解决上行无色性传输的最优方案。基于OFDM的时波分复用无源光网络（TWDM-PON）充分利用了OFDM调制优势，用来提升单载波容量，在不改变TWDM-PON系统结构情况下，实现100 Gbit/s的高速接入，是未来无源光网络的重要候选方案。

[关键词] 正交频分复用；无源光网络；时分复用；时波分复用

[Abstract] In this paper, we propose that the power fading of double sideband for OFDM-PON induced by chromatic dispersion is small when using low radio frequency (RF). The OFDM-PON based on time division multiplexing (TDM) architecture is the best solution for uplink colorless transmission. This makes full use of the advantages of OFDM technique and colorless TDM architecture and is highly compatible with existing EPON and GPON. Time wavelength division multiplexing (TWDM) PON based on OFDM is a strong candidate for future PON, which makes full use of OFDM modulation to increase the capacity of a single carrier without changing the structure of TWDM-PON system, achieving 100 Gbit/s high-speed access.

[Keywords] orthogonal frequency division multiplexing; passive optical network; time division multiplexing; time wavelength division multiplexing