Analysis of BER and capacity for dual-hop OFDM relay system with subcarrier mapping in Nakagami-m fading
Raza Ali Shah, Nandana Rajatheva, Yusheng Ji · 2014
This paper presents the analysis of BER and ergodic capacity for dual-hop orthogonal frequency division multiplexing (OFDM) Amplify-and-forward (AF) relay system with subcarrier mapping (SCM) in Nakagami-m fading channel for m ≤ 1. The performance of capacity-enhancement optimal pairing scheme, i.e., Best-to-Best (BTB) SCM scheme is analyzed for the two special cases of Nakagami-m fading, i.e., one sided Gaussian fading and Rayleigh fading. The exact and approximate closed-form expressions for the moment generating function (MGF) of end-to-end SNR are derived. The upper bound for ergodic capacity is also derived. The simulation results validate the analysis in Nakagami-m fading channel.