Robust precoder-decoder design for physical layer network coding-based MIMO two-way relaying system

作     者：Jayasinghe, Laddu Keeth Saliya Rajatheva, Nandana Latva-Aho, Matti 

作者机构：Univ Oulu CWC Dept Commun Engn FIN-90570 Oulu Finland 

出 版 物：《EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING》 (EURASIP无线通信与网络杂志)

年 卷 期：2013年第2013卷第1期

页      面：1页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：European Commission [FP7-ICT-2009-4-247733-EARTH] Finnish Funding Agency for Technology and Innovation (Tekes) Renesas Mobile Nokia Siemens Networks Elektrobit 

主　　题：Bit error rate Imperfect channel state information Mean square error Multiple-input multiple-output Non-convex optimization Physical layer network coding 

摘      要：In this paper, we investigate a robust joint precoder-decoder design scheme for a multiple-input multiple-output physical layer network coding (PNC)-based two-way relay system. An orthogonal training sequence is used to estimate the channels. The estimate is imperfect, and a robust design is proposed to find precoders at the source nodes and decoder at the relay node to facilitate PNC operations during multiple-access stage. Both channel estimation error and antenna correlations are used to formulate the optimization problem to minimize the weighted mean square error (WMSE) under a total power constraint. The problem becomes non-convex, and we propose an algorithm to solve it optimally. During the broadcast stage, an algorithm is proposed to find a precoder at the relay node and decoders at source nodes. The system performance is evaluated with estimation error and antenna correlation parameters. The effect of weighting parameters, relay location, and number of antennas at nodes are also considered in the numerical analysis. Numerical results confirm that our joint precoder-decoder algorithms provide the optimal solution to the minimization of WMSE with the total available power.