Performance of hybrid relay selection in cooperative communications system

Cooperative communication system aims to reduce the influence of multipath fading. There are two protocol relay techniques on cooperative communication system, namely amplify and forward (AF) and decode and forward (DF). Hybrid relay selection (HRS) is a combination of AF and DF protocols where the relay will select one protocol using hybrid relay selection technique. If the information submitted is true, then the relay node will choose to send information with the DF protocol or vice versa. In this research, we performed performance simulation from Hybrid relay protocol on cooperative communication system using AF relay protocol, DF, and hybrid with Selection Combining (SC) technique. The parameter used as system performance is bit error rate (BER). The performance of the system is evaluated on direct path, multi-hop AF, multi-hop DF and Hybrid Relay Selection. Based on the simulation results showed that hybrid relay selection in cooperative communications system produced the best performance among other system. At condition Signal to Noise Ratio 11 dB, the Hybrid Relay Selection system had a performance of BER 10^-5, while the other system has a larger BER performance.