A Comparative Error Performance Study of Power Adaptive Regenerative Relaying Policy, and Benchmark Relaying Policies

Non-regenerative and regenerative relays have attracted a great deal of interest in the collaborative wireless communication systems. It is a known fact that device to device communication with relay assistance has catered enhanced network performance. In this work, the authors consider two relay-assisted collaborative device to device (D2D) wireless communication system. In it, power adaptive regenerative relays help the source to forward its transmitted signal. One of the two power adaptive regenerative relays is selected based on a probabilistic relay selection policy. For the two hop collaborative D2D system model, we derive the fading-averaged symbol error rate (FASER) expression for the proposed power adaptive regenerative relaying policy (PARRP) in an insightful scaling regime. Furthermore, in the scaling regime, we derive closed-form FASER expressions for the benchmark policies and compare their performance with that of PARRP. We find that the PARRP delivers superior FASER performance in comparison to the benchmark policies.