Research of demodulation-decoding iteration based on close-loop feedback system

In novel wireless communication system, BER performance will decrease by increasing the modulation order which brings more complexity to demodulation, on the other hand, channel estimation detects the channel quality and feed the channel information back to the station adaptively. This article introduces a novel demodulation-decoding iteration scheme thanks for the relationship of the bits within a modulation symbol. And it also uses the feedback information to decide the decoding iteration times. The simulation results show that the iteration can better the BER performance and the feedback information helps to decide the iteration times which makes the system more efficient.