DocumentCode :
3605310
Title :
On the Ergodic Capacity of Underlay Cognitive Dual-Hop AF Relayed Systems Under Non-Identical Generalized- 
Fading Channels
Author :
Miridakis, Nikolaos I.
Author_Institution :
Dept. of Comput. Syst. Eng., Piraeus Univ. of Appl. Sci., Aegaleo, Greece
Volume :
19
Issue :
11
fYear :
2015
Firstpage :
1965
Lastpage :
1968
Abstract :
The ergodic capacity of underlay cognitive (secondary) dual-hop relaying systems is analytically investigated. Specifically, the amplify-and-forward transmission protocol is considered, while the received signals undergo multipath fading and shadowing with non-identical statistics. To efficiently describe this composite type of fading, the well-known generalized-K fading model is used. New analytical expressions and quite accurate closed-form approximations regarding the ergodic capacity of the end-to-end communication are obtained, in terms of finite sum series of the Meijer´s-G function. The analytical results are verified with the aid of computer simulations, while useful insights are revealed.
Keywords :
amplify and forward communication; approximation theory; cognitive radio; fading channels; relay networks (telecommunication); Meijer-G function; amplify and forward transmission protocol; closed-form approximations; end-to-end communication; ergodic capacity; finite sum series; multipath fading; nonidentical generalized-K fading channels; nonidentical statistics; received signals; underlay cognitive dual-hop AF relayed systems; Approximation methods; Computational modeling; Fading; Relays; Shadow mapping; Signal to noise ratio; Amplify-and-Forward (AF); Amplify-and-forward (AF); cognitive systems; ergodic capacity; generalized fading channels; performance analysis;
fLanguage :
English
Journal_Title :
Communications Letters, IEEE
Publisher :
ieee
ISSN :
1089-7798
Type :
jour
DOI :
10.1109/LCOMM.2015.2475739
Filename :
7236871
Link To Document :
