一种新的OFDM-PON子载波分配机制

摘要

Subcarrier allocation is one of the key technologies in the Orthogonal Frequency Division Multiplexing Passive Optical Network (OFDM-PON),which has been received more and more attentions recently.This paper first introduces two existing subcarrier allocation schemes.Then a novel subcarrier allocation scheme is proposed for upstream transmission in OFDM-PON.The scheme is divided into two parts:modulus operation and patchwork scheme.The scheme can effectively reduce the waste of bandwidth of guard time.Simulation results show that the proposed scheme obtains higher throughput compared to existing schemes.%OFDM-PON(正交频分复用无源光网络)技术受到越来越多的关注，而子载波分配是其关键技术之一。文章介绍了两种已有的 OFDM-PON子载波分配机制，并在此基础上提出一种新的 OFDM-PON 上行传输的子载波分配机制，该机制主要分为求余法和凑数法两部分，可以有效地减少用于保护间隔的带宽浪费。仿真结果表明，与已有的子载波分配机制相比，新的子载波分配机制可以获得更高的吞吐量。