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



performance analysis

fading channels




wireless networks


generalized fading channels

radio propagation

dual-hop transmission


C. J. Zhong

Zhejiang University

Michail Matthaiou

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Signal Processing

G. K. Karagiannidis

Aristotle University of Thessaloniki

T. Ratnarajah

Queen's University Belfast

IEEE Transactions on Vehicular Technology

0018-9545 (ISSN)

Vol. 60 8 3814-3824

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering



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