MB-OFDM系统中采用梳状导频的信道估计  

Channel Estimation Based on Comb-type Pilot for MB-OFDM Systems

作　　者：张先玉[1] 刘郁林[1] 刘宏[1] 

机构地区：[1]重庆通信学院DSP实验室,重庆400035

出　　处：《电讯技术》2009年第7期27-30,共4页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(60672157;60672158);重庆市自然科学基金资助项目(CSTC2005BB4219)

摘　　要：针对采用梳状导频的多频带正交频分复用(MB-OFDM)系统,提出一种新的基于频域插值定理的信道估计算法,即FD-INTERP。与传统的插值信道估计算法不同,FD-INTERP算法首先计算出导频点处的信道值,再根据DFT频域插值定理计算出时域信道。算法仅需较少的导频符号,提高了频带利用率,并且避免了插值计算,提高估计精度的同时降低了运算量。仿真结果表明该算法具有良好的可靠性和稳定性。A novel channel estimation algorithm （FD - INTERP） is proposed for MB - OFDM systems based on comb - type pilot. Unlike the conventional algorithm exploiting the interpolation methods, the proposed algorithm exploits the pilots to estimate the channel based on the frequency interpolation theorem of the DFI＇. The algorithm needs few pilot symbols, so the bandwidth utilization is efficient. On the other hand, the algorithm avoids a mass of interpolation counts, so the algorithm＇ s efficiency is high. The simu- lation results demonstrate the efficiency of the algorithm.

关 键 词：多频带正交频分复用 超宽带 信道估计 梳状导频 插值 

分 类 号：TN911.7[电子电信—通信与信息系统]