Generalized Block-Diagonalization Schemes for MIMO Relay Broadcasting Systems. (30th December 2014)

• Record Type: Journal Article
• Authors: Wang, Xianan; Wang, Xiaoxiang; Gong, Wenrong; Huang, Zijia
• Other Names: Kaklamani Dimitra Academic Editor.
• Is Part Of: International journal of digital multimedia broadcasting. Volume 2014(2014)
• Publication Date: 2014-12-30
• Subjects: Multimedia communications -- Periodicals; Digital audio broadcasting -- Periodicals; Mobile communication systems -- Periodicals; Digital audio broadcasting; Mobile communication systems; Multimedia communications; Periodicals; 621.382
• DOI: 10.1155/2014/305846
• Languages: English
• ISSNs: 1687-7578

Abstract

Abstract : We propose two generalized block-diagonalization (BD) schemes for multiple-input multiple-output (MIMO) relay broadcasting systems with no channel state information (CSI) at base station. We first introduce a generalized zero forcing (ZF) scheme that reduces the complexity of the traditional BD scheme. Then the optimal power loading matrix for the proposed scheme is analyzed and the closed-form solution is derived. Furthermore, an enhanced scheme is proposed by employing the minimum-mean-squared-error (MMSE) criterion. Simulation results show that the proposed generalized MMSE scheme outperforms the other schemes and the optimal power loading scheme improves the sum-rate performance efficiently.