Accurate error performance analysis of bidirectional amplify-and-forward relay networks

The Bit Error Rate (BER) performance of a two-hop Bidirectional Amplify-and-Forward Multiple Relay (BAF-MR) network is analyzed in two ways: the first focuses on analysing Asymptotic BER (ABER) for the applications use high Signal-to- Noise Ratio (SNR) level, and second involved Exact BER (EBER) analysis for all SNR levels. The paper also investigates a new method to increase the accuracy of the ABER for a wide range of applications work under low or high SNR levels. Moreover, the ABER is used to calculate the EBER, which is more complex than the ABER. Thus, the BER of BAF-MR networks can be evaluated under low and high SNR levels using either ABER or EBER. The analytic expressions for both ABER and EBER are confirmed by simulation.