Title :
Joint Channel Estimation for Three-Hop MIMO Relaying Systems
Author :
Cavalcante, Italo Vitor ; de Almeida, Andre L. F. ; Haardt, Martin
Author_Institution :
Dept. of Teleinformatics Eng., Fed. Univ. of Ceara, Fortaleza, Brazil
Abstract :
We propose a novel joint channel estimator for a relaying MIMO communication system. Considering a three-hop relaying protocol, our combined alternating least squares (Comb-ALS) algorithm obtains cooperative diversity by fully exploiting the tensor algebraic structures of the available cooperative MIMO links. This is achieved by coupling the tensor data for the different relay-assisted links to iteratively estimate the channel matrices. Simulation results corroborate the effectiveness of the proposed tensor-based joint channel estimator in comparison with a sequential tensor-based method and a sequential LS estimator.
Keywords :
MIMO communication; channel estimation; iterative methods; least squares approximations; relay networks (telecommunication); tensors; Comb-ALS algorithm; channel matrices; combined alternating least squares algorithm; cooperative MIMO links; cooperative diversity; iterative estimation; novel joint channel estimation; tensor algebraic structures; three-hop MIMO relaying systems; three-hop relaying protocol; Channel estimation; Coperative communcation; MIMO; Signal to noise ratio; Channel estimation; cooperative communications; relaying; tensor decomposition;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2015.2490251
