Performance analysis of decode and forward relaying over Generalized-K channels at arbitrary SNR for wireless sensor networks

摘要

Many authors have considered the performance analysis of M-QAM modulated signals over the Generalized-K channel but only at High Signal-to-Noise Ratio (SNR) range. Furthermore, in the cooperative context, only Amplify and Forward protocol has been considered for this kind of fading channel, and it was limited to high SNR range for M-QAM modulated signals. In this paper, we present performance analysis of both the direct link and the adaptive Decode and Forward (DF) relaying protocol with multiple relays over independent and identical (i.i.d) Generalized K fading channels. Besides, we handle with the whole SNR range for M-QAM modulated signals; we give accurate analytical expressions for the Average Symbol Error Probability (ASEP) and the outage probability. Results for high SNR are derived as particular cases. We have provided Monte-Carlo simulation results which match well theoretical ones. The obtained results are very useful to tackle the QoS based on cooperative communications for wireless sensor networks.