Channel estimation for amplify-and-forward relaying: Cascaded against disintegrated estimators
Channel estimation for amplify-and-forward relaying: Cascaded against disintegrated estimators
复制标题
DOI：
10.1049/iet-com.2009.0435
复制
发表时间：
2010-06
期刊：
影响因子：
--
通讯作者：
Osama Amin;Berna Gedik;M. Uysal
中科院分区：
文献类型：
--
作者：
Osama Amin;Berna Gedik;M. Uysal
研究了放大转发中继系统在两种不同的导频辅助信道估计方法下的性能。在第一种估计方法中，在目的终端处估计由源到中继和中继到目的链路组成的级联信道。在中继终端不需要信道估计器。在第二种估计方法中，级联信道的估计被分解为源到中继和中继到目的地链路的单独估计，分别在中继和目的地终端处执行。后一种方法涉及将源到中继信道估计的量化版本前馈到目的地终端。通过推导均方误差（MSE）分集增益分析和蒙特-卡罗仿真，研究了放大转发中继在这几种信道估计方法下的性能。我们的研究结果表明，充分的多样性，可以实现在信道估计的存在。作者进一步表明，级联信道估计器优于其竞争对手的量化位数少。随着所使用的量化比特数的增加，分解信道估计器接近其竞争对手，最终超过它。
The authors investigate the performance of amplify-and-forward relaying with two different pilot-symbol-assisted channel estimation methods. In the first estimation method, the cascaded channel consisting of source-to-relay and relay-to-destination links is estimated at the destination terminal. No channel estimator is required at the relay terminal. In the second estimation method, the estimation of cascaded channel is disintegrated into separate estimations of source-to-relay and relay-to-destination links which are carried out at the relay and the destination terminals, respectively. The latter method involves feed-forwarding a quantised version of the source-to-relay channel estimate to the destination terminal. Through the derivation of mean squared error (MSE) diversity gain analysis and Monte-Carlo simulations, the authors investigate the performance of amplify-and-forward relaying with these channel estimation methods. Our results demonstrate that full diversity can be achieved in the presence of channel estimation. The authors further show that cascaded channel estimator outperforms its competitor with a small number of quantisation bits. As the number of employed quantisation bits increase, disintegrated channel estimator approaches to its competitor eventually outperforming it.