LLR-Based Decode-and-Forward Protocol for Relay Networks and Closed-Form BER Expressions(Communication Theory and Signals)
スポンサーリンク
概要
- 論文の詳細を見る
Decode-and-forward cooperative communications protocol (DFP) allows single-antenna users in wireless medium to obtain the powerful benefits of multi-antenna systems without physical antenna arrays. So far, only signal-to-noise ratio (SNR) or square amplitude of path gain has been used to evaluate the reliability of received signals for relays to decide whether to forward the decoded data so as to prevent unsuccessful detection at the relays. In this paper, we propose using log-likelihood ratio (LLR) as an alternative to SNR in the conventional DFP. Closed-form BER expressions for different versions of DFP are also derived and verified by Monte-Carlo simulations. A variety of numerical results reveal the significant superiority of LLR-based DFP to SNR-based DFP regardless of threshold level and relay position under flat Rayleigh fading channel plus additive white Gaussian noise (AWGN).
- 社団法人電子情報通信学会の論文
- 2006-06-01
著者
-
Khuong Ho
Department Of Electrical Engineering University Of Ulsan
-
Kong Hyung
Univ. Ulsan Kor
-
Kong Hyung
Department Of Electrical Engineering University Of Ulsan
関連論文
- Incremental Relaying with Partial Relay Selection
- Code Combining in Cooperative Communication
- Diversity Order Analysis of Dual-Hop Relaying with Partial Relay Selection
- LLR-Based Decode-and-Forward Protocol for Relay Networks and Closed-Form BER Expressions(Communication Theory and Signals)
- Design of Novel Multi-Level Quasi-Orthogonal Codes for Mc-MC-CDMA System(Wireless Communication Technologies)
- A Combination of AOC-SS Modulation, Mapping Technique and Space-Time Coding for Variable High-Rate Transmission(Wireless Communication Technologies)
- Distributed Switch and Stay Combining with Partial Relay Selection over Rayleigh Fading Channels