Title :
Precoding Design of MIMO AF Two-Way Multiple-Relay Systems
Author :
Chia-Chang Hu ; Yu-Fei Chou
Author_Institution :
Dept. of Commun. Eng., Nat. Chung Cheng Univ., Min-Hsiung, Taiwan
Abstract :
The precoding joint optimization is proposed for multiple-input multiple-output (MIMO) two-way multiple-relay systems with amplify-and-forward (AF) strategy in correlated fading channels. The terminal transceivers and relay precoding matrices are designed based on the minimum mean square error (MMSE) criterion. This combined design of precoding matrices and equalizers under power constraints belongs to neither concave nor convex so that the nonlinear matrix-form conjugate gradient (MCG) algorithm is developed to acquire the local optimal solutions. Simulation results demonstrate that the proposed precoding joint architecture possesses a superior bit-error-rate (BER) performance and a faster convergence rate.
Keywords :
MIMO communication; error statistics; fading channels; least mean squares methods; precoding; radio transceivers; relay networks (telecommunication); BER; MIMO AF two-way multiple-relay systems; MMSE; amplify-and-forward; bit-error-rate; fading channels; minimum mean square error; multiple-input multiple-output two-way multiple-relay systems; nonlinear matrix-form conjugate gradient algorithm; precoding design; precoding joint optimization; relay precoding matrices; terminal transceivers; Covariance matrix; Joints; MIMO; Protocols; Relays; Transceivers; Vectors; Amplify-and-forward; CSI; MIMO; precoder; two-way;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2012.2231069
