A new ARQ method for turbo coded MC-CDMA

This paper investigates a new ARQ method for turbo coded MC-CDMA systems in the multipath fading environment. Some typical phenomena were observed, then a new parameter to control the ARQ protocol was defined. Encouraged by the prediction of BER in the EXIT chart, we compute a threshold for the new parameter. Simulation results show that the improved ARQ method decreases the bit error rate in less system cost and complexity.