Space-Division Relay: A High-Rate Cooperation Scheme for Fading Multiple-Access Channels

— We propose a new cooperation protocol for the fading multiple-access channel called space-division relay (SDR). It is similar to the protocol of Laneman, Tse and Wornell (LTW) [1], except that the relays use spacedivision instead of time-division multiplexing. The result is a nonorthogonal cooperation protocol with a higher rate that nevertheless achieves the full diversity of the two-user Rayleigh-fading cooperative multiple-access channel, a result that is proven in this paper. We examine the SDR protocol with two types of relays: the amplify-andforward (AF) relay and the amplify/decode-and-forward (ADF) relay. We derive the outage probability of the proposed scheme with AF relays. We present numerical results for the two-user channel at 1 bps/Hz which show that SDR-ADF outperforms all previously reported cooperative schemes. In particular, in terms of the SNR required to achieve a 10–3 outage probability, the SDR-AF

• Type: Conference
• Year: 2007
• Where: GLOBECOM
• Authors: Arumugam Kannan, John R. Barry
• Keywords: Channel Called Space-division, Cooperation Protocol, GLOBECOM 2007, Multiple-access Channel, Telecommunications