V-BLAST-based demodulate-and-forward two-way relaying:protocol design and the detection  

作　　者：贠超 Xiong Haitao Wang Ping Li Mingqi Bu Zhiyong 

机构地区：[1]Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, P.R. China [2]Shanghai Jushri Technologies, Inc., Shanghai 201112, P.R.China

出　　处：《High Technology Letters》2009年第4期388-393,共6页高技术通讯（英文版）

基　　金：Supported by the National High Technology Research and Development Program of China (No. 2006AA01Z280,2007AA01 Z278).

摘　　要：We propose a novel vertical Bell Laboratories layered space-time （V-BLAST） based two-way relaying protocol that comprises two user terminals and one multi-antenna demodulate-and-forward （DMF） relay station. We consider the situation when these two user temainals employ different modulation types and investigate its detection techniques. The key feature of the detection techniques is that we quantify decision reliability at the relay station by introducing a so-called normalized correlation coefficient （CORR）, rather than having full confidence in demodulation at the relay station. With the assistance of the normalized correlation coefficient, we develop detection methods at both the relay station and user terminals. In particular, we propose a CORR-based ordering algorithm at the relay station which can be applied to detection for general V-BLAST architectures. Simulation results demonstrate the superiority of the CORR- based ordering algorithm over the conventional signal-to-noise based ordering algorithm. Finally, we demonstrate overall error-performance of the V-BLAST-based DMF two-way relaying protocol via simulations.We propose a novel vertical Bell Laboratories layered space-time (V-BLAST) based two-way relayingprotocol that comprises two user terminals and one multi-antenna demodulate-and-forward (DMF) relaystation. We consider the situation when these two user terminals employ different modulation types andinvestigate its detection techniques. The key feature of the detection techniques is that we quantify decisionreliability at the relay station by introducing a so-called normalized correlation coefficient (CORR),rather than having full confidence in demodulation at the relay station. With the assistance of the normalizedconelation coefficient, we develop detection methods at both the relay station and user terminals. Inparticular, we propose a CORR-based ordering algorithm at the relay station which can be applied to detectionfor general V-BLAST architectures. Simulation results demonstrate the superiority of the CORR-basedordering algorithm over the conventional signal-to-noise based ordering algorithm. Finally, wedemonstrate overall error-performance of the V-BLAST-based DMF two-way relaying protocol via simulations.

关 键 词：RELAYING demodulate-and-forward （DMF） vertical Bell Laboratories layered space- 

分 类 号：TN925.1[电子电信—通信与信息系统]