The Global Optimality of the MIMO Cooperative System with Source and Relay Precoders for Capacity Maximization

Author

Park, Wonwoo ; Jeong, Sungheon ; Song, Hong-Yeop ; Lee, Chungyong

Author_Institution

Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea

Volume

60

Issue

10

fYear

2012

fDate

10/1/2012 12:00:00 AM

Firstpage

2886

Lastpage

2892

Abstract

This paper deals with the global optimality of the channel capacity of the multiple-input multiple-output (MIMO) cooperative system which is equipped with precoders at source and relay, and exploits the direct channel between source and destination. Each precoder of the system is individually designed by the Lagrangian method and the final precoders are decided by an iterative structure. To prove the global optimality for the channel capacity of the system with these joint precoders, we show that the channel capacity function of the system is a concave function and the constraints of the system are convex sets.

Keywords

MIMO communication; cooperative communication; optimisation; precoding; Lagrangian method; MIMO cooperative system; capacity maximization; channel capacity function; convex sets; direct channel; global optimality; iterative structure; multiple-input multiple-output cooperative system; relay precoder; source precoder; Channel capacity; Cooperative systems; MIMO; Mutual information; Noise; Relays; Strontium; MIMO system; cooperative system; iterative structure; optimal precoder; relay precoder; source precoder;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2012.071812.110432

Filename

6247439