一种新的OFDM-PON子载波分配机制  

A Novel Subcarrier Allocation Scheme in OFDM-PON

作　　者：胡发泽 李汝星 伍仕宝[1] HU Fa-ze LI Ru-xing WU Shi-bao(Key Lab of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072 ,Chin)

机构地区：[1]上海大学特种光纤与光接入网重点实验室,上海200072

出　　处：《光通信研究》2016年第3期1-3,共3页Study on Optical Communications

基　　金：国家自然科学基金资助项目(61275073;61420106011);上海市科委资助项目(13JC1402600;15530500600)

摘　　要：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。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.

关 键 词：正交频分复用无源光网络 子载波分配 吞吐量 

分 类 号：TN915.6[电子电信—通信与信息系统]