Distributed Space-Time Block Code over Mixed Rayleigh and Rician Frequency-Selective Fading Channels
1 School of Electronics and Information, Kyung Hee University, Yongin, Geonggi 446-701, Republic of Korea
2 School of Engineering and Computing, Glasgow Caledonian University, Cowcaddens Road, Glasgow G4 0BA, UK
EURASIP Journal on Wireless Communications and Networking 2010, 2010:385872 doi:10.1155/2010/385872Published: 1 July 2010
This paper proposes a new distributed space-time block code (DSTBC) over frequency-selective fading channels for two-hop amplify and forward relay networks, consisting of a source node (), two relay nodes ( and ), and a destination node (). The proposed DSTBC is designed to achieve maximal spatial diversity gain and decoupling detection of data blocks with a low-complexity receiver. To achieve these two goals, uses zero-sequence padding, and relay nodes precode the received signals with a proper precoding matrix. The pairwise error probability (PEP) analysis is provided to investigate the achievable diversity gain of the proposed DSTBC for a general channel model in which one hop is modeled by Rayleigh fading and the other by Rician fading. This mixed Rayleigh-Rician channel model allows us to analyze two typical scenarios where are in the neighborhood of either or .