追踪子带划分的OFDM自适应调制算法研究  

Research on Adaptive OFDM Algorithm Based on Trace of Dynamic Partitioning Sub-bands

作　　者：李莉[1] 顾朝志[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：《西华大学学报（自然科学版）》2015年第1期46-51,共6页Journal of Xihua University:Natural Science Edition

基　　金：中央高校基本科研业务费专项资金资助(13CX02028A)

摘　　要：针对某些信道的慢时变特性和某些对时延要求严格的业务需求,提出一种追踪子带动态划分OFDM自适应调制算法(TDS-OFDM)。该算法充分考虑信道的慢时变性,根据本帧的信道状态和前1帧子带划分的结果快速实现动态的子带划分,并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,能有效减小时延,减少信令信息的传递,提高系统的频谱利用率。To adapt the slow time-varying characteristics of some channel and meet the requirements of certain business for strict delay, an adaptive OFDM algorithm based on trace of dynamic partitioning sub-bands is proposed. The algorithm takes full advantage of slow time-varying channel, realizes the dynamic sub division quickly according to the frame channel state and the results of the previous frame sub-band division, and selects the same modulation for all sub-carriers adaptively. Simulation results show that, under the premise of ensuring the transmission quality, the algorithm can effectively reduce the delay and the transmission of signaling information to improve spectrum utilization of the system while with low complexity.

关 键 词：慢时变 OFDM 子带 自适应调制 

分 类 号：TN911.72[电子电信—通信与信息系统]