Computing Amplify-and-Forward Relay Amplification Factor to Improve Total Capacity at Destination | Science Publications

American Journal of Applied Sciences

Hushairi Zen¹  Olalekan Bello¹  Khairuddin Abdul Hamid¹  Al-Khalid Othman¹ 

关键词: Amplify-and-Forward Relays;    Amplification Factor;    SNR;   

DOI  :  10.3844/ajassp.2015.572.580

学科分类：自然科学（综合）

来源: Science Publications

【 摘 要 】

In this study, we propose a new Amplify-and-Forward (AF)amplification factor to improve the error performances of the current AFschemes and thus enhance the total capacity at the destination terminal. Theproposed scheme has two degrees of freedom,meaning that it contains two variable parameters that can simultaneously varythe amplification factor instead of one as in traditional variable-gain orsemi-blind relaying. The numerical results show that the proposed AF scheme outperformssome current ones with which it is compared in terms of average capacity andprobability of outage and thus brings AF relaying performances closer to thatof Decode-and Forward (DF) strategy which hitherto outperforms it. The resultsalso show that by increasing or decreasing the power share of the relay, theoptimal location of the relay is not only moved closer to or farther away fromthe destination, the total average capacity at that location is also correspondingly increased or decreased.

【 授权许可】

Unknown