Location-Aware Cooperative Communications Utilizing Linear Network Coding

— Cooperative communication can be used to reduce the transmit power of distant mobile units, compared to conventional direct transmission, given the same quality-of-service. However, imposing the constraint of having orthogonal transmission for the source and relays leads to large delay in TDMA systems. For a network of N mobile units, the transmission delay would be N(N +1)/2. In this work, we propose a location-aware cooperation-based scheme that aims to reduce transmit power of distant mobile units while maintaining a low transmission delay. The scheme utilizes a linear network coding protocol, where each mobile unit applies linear network coding to a set of transmit symbols that it has received previously. At the base station, multiuser detection is used to decouple the transmit symbols. Both decode-and-forward and amplify-and-forward cooperative protocols are considered. We show that our proposed scheme achieves a comparable bit-error-rate performance with the conventional coop...

• Type: Conference
• Year: 2008
• Where: GLOBECOM
• Authors: Hung-Quoc Lai, Ahmed S. Ibrahim, K. J. Ray Liu
• Keywords: Distant Mobile Units, GLOBECOM 2008, Mobile Unit, Telecommunications , Transmission Delay