Iterative LMMSE Individual Channel Estimation Over Relay Networks With Multiple Antennas
Iterative LMMSE Individual Channel Estimation Over Relay Networks With Multiple Antennas
复制标题
具有多个天线的中继网络上的迭代 LMMSE 单独信道估计
DOI：
10.1109/tvt.2017.2746562
复制
发表时间：
2018-01-01
影响因子：
6.8
通讯作者：
Nallanathan, Arumugam
中科院分区：
文献类型：
--
作者：
Ma, Jianpeng;Zhang, Shun;Nallanathan, Arumugam
In this paper, we investigate the individual channel estimation over the three-node one-way relay network, where all the nodes are equipped with multiple antennas. We first examine one simple but representative scenario, where the relay node is equipped with a single antenna. An iterative linear minimum mean-square-error (LMMSE) method, which has fast convergence speed, is proposed to estimate the individual channels. We derive the closed-form least square channel estimator through the matrix unitary diagonalization to provide one good initialization point for the iterative LMMSE estimator. To evaluate the performance of the proposed algorithm, we present two performance lower bounds: Bayesian Cramer lower bound and linear estimation lower bound (LELB). Then, the training block and the relay amplification factor are optimized through minimizing the LELB. After that, our studies are extended to the general case, where all the nodes are equipped with multiple antennas. Finally, numerical results are provided to corroborate our proposed studies.
