Dynamic harvest-and-forward: New cooperative diversity with RF energy harvesting

In this paper, we propose a new cooperative diversity technique with radio frequency (RF) energy harvesting named dynamic harvest-and-forward (DHF) cooperation. This cooperation enables to obtain diversity gain with consuming neither extra energy nor extra bandwidth by exploiting the relay´s proximity advantage over the destination. We analyze the proposed approach in terms of outage probability. Computer simulations confirm the theoretical analysis and show that the DHF cooperation can achieve the diversity order of two (full diversity) in typical three node cooperation scenario. We also investigate the effect of geometrical arrangement and reveal that the advantageous region of DHF cooperation over the direct transmission without the energy harvesting relay.