Differential dual-hop relaying under user mobility

作者：Avendi M R^*; Nguyen Ha H

来源：IET Communications, 2014, 8(17): 3161-3169.

DOI：10.1049/iet-com.2014.0278

• relay networks (telecommunication)
• amplify and forward communication
• error statistics
• decoding
• encoding
• signal detection
• time-varying channels
• Rayleigh channels
• CDD
• MSD
• suboptimal multiple-symbol detection
• error floor
• signal-to-noise ratio region
• fast-fading channels
• bit error rate
• convectional two-symbol differential detection
• time-varying Rayleigh-fading channels
• differential decoding
• differential encoding
• dual-hop amplify-and-forward relaying system
• user mobility

This study studies dual-hop amplify-and-forward relaying system employing differential encoding and decoding over time-varying Rayleigh-fading channels. First, the convectional two-symbol' differential detection (CDD) is theoretically analysed in terms of the bit error rate. The obtained analysis clearly shows that performance of two-symbol differential detection severely degrades in fast-fading channels and reaches an irreducible error floor at high signal-to-noise ratio region. To overcome the error floor experienced with fast-fading, a practical suboptimal multiple-symbol' detection (MSD) is designed and its performance is theoretically analysed. The analyses of CDD and MSD are verified and illustrated with simulation results under different fading scenarios. Specifically, the obtained results show that the proposed MSD can significantly improve the system performance in fast-fading channels.

• 出版日期2014-11-27
• 单位Saskatchewan; Saskatoon