Title : 
Energy efficiency optimisation for AF relay networks with direct transmissions
         
        
            Author : 
Yong Li ; Zhengguang Zheng ; Yang Li ; Gang Cheng
         
        
            Author_Institution : 
Dept. of Embedded Software & Syst., Beijing Univ. of Technol., Beijing, China
         
        
        
        
        
        
        
        
            Abstract : 
An efficient power allocation scheme is provided to maximise the energy efficiency for amplify-and-forward (AF) relay networks. To reduce the complexity, both the optimal and simplified equal power allocation schemes with closed-form expressions are derived.
         
        
            Keywords : 
amplify and forward communication; optimisation; relay networks (telecommunication); AF relay networks; amplify-and-forward networks; closed-form expressions; direct transmissions; energy efficiency optimisation; optimal EPA schemes; simplified equal power allocation schemes;
         
        
        
            Journal_Title : 
Electronics Letters
         
        
        
        
        
            DOI : 
10.1049/el.2014.3801