Title :
Performance of OFDM-Based Dual-Hop Amplify-and-Forward Relaying
Author :
Suraweera, Himal A. ; Armstrong, Jean
Author_Institution :
Victoria Univ., Melbourne
fDate :
9/1/2007 12:00:00 AM
Abstract :
In this letter, the end-to-end BER performance of a dual-hop OFDM-based relay system is investigated. The relay terminal operates in the amplify-and-forward (AF) mode. We derive the bit error rate (BER) of AF relaying with average power scaling (APS) constraint valid for source-relay link high signal- to-noise ratio conditions. We also study a frequency diversity technique that improves the performance of single antenna AF-APS relaying. The theoretical BER expressions are verified by computer simulations for a 4-QAM modulated OFDM system.
Keywords :
OFDM modulation; error statistics; quadrature amplitude modulation; radio links; 4-QAM; amplify-and-forward mode; average power scaling constraint; bit error rate; dual-hop OFDM-based relay system; end-to-end BER performance; frequency diversity; signal-to-noise ratio; single antenna AF-APS relaying; Bit error rate; Computer simulation; Decoding; Digital relays; Frequency diversity; OFDM; Power system relaying; Quadrature phase shift keying; Switches; Wireless sensor networks;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2007.070639
