On the Design of Amplify-and-Forward MIMO-OFDM Relay Systems With QoS Requirements Specified as Schur-Convex Functions of the MSEs

Author

Sanguinetti, Luca ; D´Amico, Antonio A. ; Yue Rong

Author_Institution

Dept. of Inf. Eng., Univ. of Pisa, Pisa, Italy

Volume

62

Issue

4

fYear

2013

fDate

May-13

Firstpage

1871

Lastpage

1877

Abstract

In this paper, we focus on the design of linear and nonlinear architectures in amplify-and-forward multiple-input-multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) relay networks in which different types of services are supported. The goal is to jointly optimize the processing matrices to minimize the total power consumption while satisfying the quality-of-service (QoS) requirements of each service specified as Schur-convex functions of the mean square errors (MSEs) over all assigned subcarriers. It turns out that the optimal solution leads to the diagonalization of the source-relay-destination channel up to a unitary matrix, depending on the specific Schur-convex function.

Keywords

MIMO communication; OFDM modulation; amplify and forward communication; convex programming; mean square error methods; quality of service; relay networks (telecommunication); wireless channels; MIMO OFDM relay network; MSE; QoS requirement; Schur-convex function; amplify-and-forward multiple-input-multiple-output; mean square error; nonlinear architecture; orthogonal frequency-division multiplexing; power consumption; processing matrices; quality-of-service; source-relay-destination channel; subcarrier; unitary matrix; MIMO; OFDM; Optimization; Power demand; Quality of service; Relays; Vectors; Amplify-and-forward; Schur-convex functions; multiple-input multiple-output (MIMO); nonregenerative relay; orthogonal frequency-division multiplexing (OFDM); power minimization; quality-of-service (QoS) requirements; transceiver design;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2012.2236370

Filename

6395267