Performance Analysis of Multi-Node Cooperative Network with Amplify and Forward Relay Protocol

Asshad M., Khan S. A., KAVAK A., KÜÇÜK K.

1st International Informatics and Software Engineering Conference, IISEC 2019, Ankara, Turkey, 6 - 07 November 2019 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/ubmyk48245.2019.8965574
  • City: Ankara
  • Country: Turkey
  • Keywords: amplify and forward (AF) protocol, cooperative communication, long term evolution advanced (LTE-A), maximal ratio combiner (MRC), relay nodes (RN)
  • Istanbul Technical University Affiliated: No


© 2019 IEEE.As the telecom sector developed, the importance of cooperative communication is over increased with time as well. In long term evolution advanced (LTE-A) systems, cooperative communication helps to reduce the bit error rate (BER) by utilizing the services of nearby nodes. In this process, different relaying protocols are used to transmit the data from source to destination via relay nodes; however, amplify and forward (AF) relaying protocol achieves higher performance while having less computational complexity. This paper examines the performance analysis of numerous relay nodes in a cooperative network in an increasing manner by using AF relaying protocol. At the destination node, the Maximal Ratio Combiner (MRC) method is used while receiving the transmitted signal via relay nodes as well as directly from the source. Two modulation techniques such as binary phase-shift keying (BPSK) and quadrature phase-shift keying (QPSK) are used with additive white Gaussian noise (AWGN) channel. Moreover, k numbers of relay nodes in the cooperative wireless network are considered for performance analysis in terms of bit error rate (BER) vs signal to noise ratio (SNR). Simulation results show when the number of relay nodes increases the system performance gets improved. Also, modulation techniques affect the performance of the system.