摘要： 依据频率选择性衰落信道下基于正交频分复用技术的多节点放大转发协作通信系统，提出一种基于叠加导频的分段式信道估计方法。该方法采用双块状导频，分别记录级联链路和第2段链路状态信息，并估计相应的信道状态信息，计算出第1段链路信道状态信息。仿真结果表明，该方法能够获得2段链路的信道状态信息，减小信道估计导频开销和时隙周期，提高信道估计的实时性。
关键词:
信道估计,
双块状导频,
放大转发,
协作分集,
正交频分复用,
估计误差
Abstract: A superposed training sequence aided disintegrated channel estimation method is proposed for Orthogonal Frequency Division Multiplexing(OFDM) based multi-node Amplify-and-Forward(AF) cooperative communication over frequency-selective fading channel. This method estimates the cascaded Channel State Information(CSI) and the second channel state information by two block training sequence, and calculates the first channel state information. Simulation results show that the proposed disintegrated estimation can be achieved successfully with greatly less training sequence symbols and less time slot and better accuracy and higher practicality.
Key words:
channel estimation,
two block training sequence,
Amplify-and-Forward(AF),
cooperative diversity,
Orthogonal Frequency Division Multiplexing(OFDM),
estimation error
中图分类号:
曹文魁, 李兆训, 窦冬冬. 多节点AF协作通信系统中的信道估计方法[J]. 计算机工程, 2012, 38(22): 80-83.
CAO Wen-Kuai, LI Zhao-Xun, DOU Dong-Dong. Channel Estimation Method for Multi-node Amplify-and-Forward Cooperative Communication System[J]. Computer Engineering, 2012, 38(22): 80-83.