Impact of oversampling digital filter relay strategy on the performance of physical layer network coded transmission
Basanti Ghanti, Siddarama R. Patil · 2016
In a wireless transmission network, relay node or intermediate nodes play a very significant role. Thus, the usage of relay transmission is mainly applicable in enlarging the coverage without need of high transmitter power and attaining spatial diversity by node cooperation. This work is mainly intended on Physical-layer Network Coded (PNC) transmission for a two-way wireless transmission system where two source nodes, A and B, communicate through the aid of relay node using an Amplify and Forward(AF) strategy where the relay oversamples the received signal and subsequently filters before amplification. This study makes use of two, three and four-time slots transmission scenario with filter and without filter at the relay. The simulation results showed that PNC outperformed three time slot (3TS) and four time slot (4TS) transmission scenario in terms of maximum sum rate. To highlight the impact of oversampled filtering we have simulated the three transmission schemes with oversampled filter and the results indicate an increase in maximum sum rate in all the three transmission scenarios.