Generic Ergodic Capacity Bounds for Fixed-Gain AF Dual-Hop Relaying Systems
Journal article, 2011
This paper elaborates on the ergodic capacity of fixed-gain amplify-and-forward (AF) dual-hop systems, which have recently attracted considerable research and industry interest. In particular, two novel capacity bounds that allow for fast and efficient computation and apply for nonidentically distributed hops are derived. More importantly, they are generic since they apply to a wide range of popular fading channel models. Specifically, the proposed upper bound applies to Nakagami-m, Weibull, and generalized-K fading channels, whereas the proposed lower bound is more general and applies to Rician fading channels. Moreover, it is explicitly demonstrated that the proposed lower and upper bounds become asymptotically exact in the high signal-to-noise ratio (SNR) regime. Based on our analytical expressions and numerical results, we gain valuable insights into the impact of model parameters on the capacity of fixed-gain AF dual-hop relaying systems.
Amplify-and-forward (AF) relaying
diversity
model
performance analysis
fading channels
capacity
cooperative
ergodic
wireless networks
transmissions
generalized fading channels
radio propagation
dual-hop transmission
Author
C. J. Zhong
Zhejiang University
Michail Matthaiou
Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering
G. K. Karagiannidis
Aristotle University of Thessaloniki
T. Ratnarajah
Queen's University Belfast
IEEE Transactions on Vehicular Technology
0018-9545 (ISSN) 1939-9359 (eISSN)
Vol. 60 8 3814-3824 6015565Subject Categories
Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/tvt.2011.2167362