Decision feedback differential detection with postdetection maximal ratio diversity reception for MDPSK

A scheme of decision feedback differential detection with postdetection maximal ratio diversity reception for MDPSK was proposed. A differential detector with simple structure was designed. It can implement infinite step decision feedback. The proposed differential detector can achieve the best performance as multi-symbol differential detector in slow fading channel, while the quantity of computation is sharply reduced. Diversity reception is an effective method to improve performance in multipath fading channel. Postdetection diversity combination avoids computation of cophasing function which is required by predetection diversity combination. Simulation result exhibits the perfect performance of the proposed joint scheme, and complexity analysis shows its facility in realization. Consequently, the proposed joint scheme is in character of low complexity and good performance in slow fading channel.