Evaluation of an OFDM Cooperative System with multiple relays.

DANIEL COLON; FERNANDO GREGORIO; JUAN COUSSEAU

Entre Rios

Workshop; XIV Reunión de Trabajo en Procesamiento de la Información y Control: RPIC 2011; 2011

Universidad Nacional de Entre Ríos.

This paper studies the performanceof a cooperative OFDM (CO-OFDM)system and the alternatives to obtain full diversitygain by using space-time coding. Wepropose the implementation of minimum decodingcomplexity quasi-orthogonal space-timeblock coding (MDC-QO-STBC) with constellationrotation (CR) to achieve full rate in a cooperativescenario based on OFDM consideringwireless fading channels with more than one cooperativeusers. Our work includes a two-stepprotocol for cooperation between several cooperativeusers. Moreover, the effects of partialcooperation and retransmission with imperfectdecoding over the system performance is alsoevaluated.