高技术通讯2011，Vol.21Issue(2)：137-143,7.DOI:10.3772/j.issn.1002-0470.2011.02.005
基于导频时分复用的多中继协同通信系统频域信道估计算法
A pilot time division multiplexing based channel estimation algorithm for multi-relay cooperative communication systems
摘要
Abstract
A training sequence aided frequency-domain channel estimation algorithm based on pilot time division multiplexing was proposed for orthogonal frequency division multiplexing (OFDM) based amplify-and-forward (AF) cooperative communication systems with multiple relay nodes over frequency-selective fading channels, including the least squares (LS) estimation method and the low-rank linear minimum mean square error (Lr-LMMSE) estimation method. The theoretical analysis shows that the proposed algorithm can achieve the entire frequency-domain channel fading coefficients of multinode AF cooperative communication systems successfully and avoid the superposition of the pilot symbols transmitted by different relay nodes. Moreover, the proposed algorithm can decrease the pilot symbols and time slots for channel estimation than the traditional algorithms, thus the transmission capacity and spectnnn efficiency of the AF cooperative communication system can be improved. And the lower complexity and the higher practicality and accuracy of the proposed algorithm were confirmed by the simulation results.关键词
协同通信/信道估计/导频时分复用Key words
cooperative communication/ channel estimation/ pilot time division multiplexing引用本文复制引用
俞晓帆,赵春明..基于导频时分复用的多中继协同通信系统频域信道估计算法[J].高技术通讯,2011,21(2):137-143,7.基金项目
863计划(2006AA012263,2009AA01Z235),国家自然科学基金(60802007)和973计划(2007CB310603)资助项目. （2006AA012263,2009AA01Z235）
