数据采集与处理2017，Vol.32Issue(4)：792-798,7.DOI:10.16337/j.1004-9037.2017.04.017
联合子载波抑制-机会网络编码的OFDM数据广播方法
Joint Subcarriers Suppression and Opportunistic Network Coding for OFDM Data Broadcasting
摘要
Abstract
Orthogonal frequency division multiplexing (OFDM) could efficiently tackle the problem of frequency-selective fading by adopting multiple subcarriers to be transmitted upon different subbands.Subcarriers with weak channel qualities suffer severe symbol errors,which limits the overall system performance.Suppressing subcarriers with bad channel qualities would solve the problem.Here,a joint subcarriers suppression and opportunistic network coding (JSSONC) scheme is proposed for OFDM data broadcasting systems,where subcarriers suppression technique is combined with network coding (NC) technique.By using JSSONC,the base station suppresses the subcarriers being in bad channel conditions.Consequently,retransmission packets used to recover lost packets are produced by adopting network coding to reduce further the number of transmissions.Simulation results show that the proposed JSSONC in OFDM data broadcasting systems reduces the average transmission times of every data package (ATT-E),compared with the traditional OFDM broadcasting systems,thus improving the system transmission efficiency.关键词
OFDM/广播系统/子载波抑制/机会网络编码Key words
orthogonal frequency division multiplexing(OFDM)/broadcasting system/subcarriers suppression/opportunistic network coding分类
信息技术与安全科学引用本文复制引用
沈先丽,许魁,韩序,徐友云..联合子载波抑制-机会网络编码的OFDM数据广播方法[J].数据采集与处理,2017,32(4):792-798,7.基金项目
国家自然科学基金重大研究计划(91438115)资助项目 （91438115）
中国博士后基金(2015T81079)特别资助项目 （2015T81079）
国家自然科学基金(61371123,61301165)资助项目 （61371123,61301165）
江苏省自然科学基金(BK2011002,BK2012055)资助项目 （BK2011002,BK2012055）
国家博士后科学基金(2014M552612)资助项目 （2014M552612）
江苏省博士后科学基金(1401178C)资助项目. （1401178C）
