Title :
Double Differential Transmission for Amplify-and-Forward Two-Way Relay Systems
Author :
Gao, Zhen ; Sun, Lifeng ; Wang, Yannan ; Liao, Xiaofeng
Author_Institution :
Dept. of Inf. & Commun. Eng., Xi´an Jiaotong Univ., Xi´an, China
Abstract :
In this work, we consider an amplify-and-forward two-way relay system with unknown carrier frequency offsets (CFOs) which change randomly. Due to the existence of CFOs, the conventional differential scheme fails. In this case, a double differential transmission scheme is proposed to achieve successful two-way relay transmission over Nakagami-m fading channels. The average symbol error rate (SER) performance of the proposed scheme is analyzed and a closed-form approximation is derived. Simulation results are provided to validate the proposed scheme.
Keywords :
amplify and forward communication; error statistics; fading channels; CFO; Nakagami-m fading channels; SER performance; amplify-and-forward two-way relay systems; carrier frequency offsets; closed-form approximation; differential scheme fails; double differential transmission; double differential transmission scheme; symbol error rate; two-way relay transmission; Approximation methods; Fading; Modulation; Oscillators; Relays; Signal to noise ratio; Simulation; Two-way relay; carrier frequency offset; double differential modulation;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2014.2350478
