Optimal power allocation for amplify-and-forward in single relay non-cooperative systems

• 作 者: 王仕果
• 机 构: Key Lab of Universal Wireless Communications,Ministry of Education,Beijing University of Posts and T
• 出 处: High Technology Letters
• 发表日期: 2010年04期
• 关键词: relay amplify cooperative allocation allocate minimize distribute fading destina

For a single-relay amplify-and-forward (AF) non-cooperative system,an optimal power proportionbetween source and relay is considered.Aiming to minimize end-to-end bit error rate (BER) and maximizeattainable rate,both large-scale path loss and small-scale Rayleigh fading are taken into account.Aclosed form expression to allocate power in optimal proportion at source is obtained.Simulation resultsshow that the proposed scheme to distribute power can minimize BER under any channel conditions.

For a single-relay amplify-and-forward (AF) non-cooperative system, an optimal power proportionbetween source and relay is considered. Aiming to minimize end-to-end bit error rate (BER) and maximize attainable rate, both large- scale path loss and small-scale Rayleigh fading are taken into account. Aclosed form expression to allocate power in optimal proportion at source is obtained. Simulation resultsshow that the proposed scheme to distribute power can minimize BER under any channel conditions.