Near-Optimum Detection for Use in Closed-Loop Distributed Space Time Coding with Asynchronous Transmission and Selection of Two Dual-Antenna Relays

Konferenz: European Wireless 2013 - 19th European Wireless Conference
16.04.2013 - 18.04.2013 in Guildford, UK

Tagungsband: European Wireless 2013

Seiten: 6Sprache: EnglischTyp: PDF

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Qaja, Walid; Elazreg, Abdulghani; Chambers, Jonathon (Advanced Signal Processing Group, School of Electronic, Electrical and Systems Engineering, Loughborough University, Loughborough LE11 3TU, UK)

We consider amplify-and-forward (AF) type cooperative wireless relay networks employing single bit closed-loop extended orthogonal space-time block coding (CL EO-STBC) over two selected cooperating relay nodes. Selection is performed from a set of NR available relay nodes each equipped with two antennas and outer convolutive coding is used to improve performance. A near-optimum detection scheme is used at the destination node for overcoming the effects of imperfect synchronization among selected relay nodes. End-to-end simulation results show that the employed detection scheme can effectively eliminate the interference components induced by asynchronism with low detection complexity. Furthermore, the one-bit feedback scheme and relay selection technique can enhance the overall system performance and outperform previous feedback methods.