COOPERATIVE DIVERSITY USING REPEAT-PUNCTURED TURBO CODES

When mobiles cannot accommodate multiple antennas due to slate hardware complexity and/or other constraints. spate-time coding cannot be used to provide uplink transmit diversity. Recently, cooperative diversity has been introduced where mobiles achieve uplink transmit diversity by relaying each other's messages. A particluar powerful variation of this principle is coded cooperation which partitions the codewords of each mobile and transmits portions of each codeword through independent fading channels. Coded cooperation framework has been easily extented using turbo codes can be improved by repetition and puneturing. This paper presents another coded cooperation. The analysis and simulation results show that the proposed scheme achieves approximately 2db gain fro a 12db inter-user channel at a BEF of 10(-4) order.