改进的动态子带划分的LPLC-OFDM自适应调制算法  

An improved dynamic subband division adaptive modulation algorithm of LPLC-OFDM

作　　者：李莉[1] 张锡岭[1] 郑李芳 王丹妮[1] 

机构地区：[1]中国石油大学(华东)计算机与通信工程学院,山东青岛266555

出　　处：《贵州师范大学学报（自然科学版）》2014年第3期71-76,共6页Journal of Guizhou Normal University：Natural Sciences

基　　金：中央高校基本科研业务费专项资金资助(13CX02028A);国家级大学生创新创业训练计划创新训练项目(201310425050)

摘　　要：针对低压电力线载波通信信道的频率选择性衰弱,提出一种改进的子带动态划分OFDM自适应调制算法。算法根据信道状态信息误差准则实现动态的子带划分,采用随机选取方案和非连续子带划分方式能自适应地为各子带中的所有子载波选择相同的调制方式。仿真结果表明,在保证传输质量的前提下,该算法复杂度低,能有效减少信令信息的传递,提高系统的频谱利用率。To adapt to frequency selective fading of Low-voltage power line,an improved adaptive OFDM algorithm based on dynamic partitioning sub-bands is proposed. The algorithm realizes the dynamic sub division quickly according to channel state information error criterion,random selection scheme and discontinuous subband division ways and selects the same modulation for all subcarriers in each sub-band adaptively. Simulation results show that,under the premise of ensuring the transmission quality,low complexity of the algorithm can effectively reduce the transmission of signaling information to improve spectrum utilization of the system.

关 键 词：低压电力线载波通信 频率选择性衰弱 OFDM 子带 自适应调制 

分 类 号：TP393.09[自动化与计算机技术—计算机应用技术]