Generic Ergodic Capacity Bounds for Fixed-Gain AF Dual-Hop Relaying Systems
Artikel i vetenskaplig tidskrift, 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.

fading channels

Amplify-and-forward (AF) relaying

dual-hop transmission

radio propagation

generalized fading channels





performance analysis

wireless networks




C. J. Zhong

Zhejiang University

Michail Matthaiou

Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

G. K. Karagiannidis

Aristotle University of Thessaloniki

T. Ratnarajah

Queen's University Belfast

IEEE Transactions on Vehicular Technology

0018-9545 (ISSN)

Vol. 60 3814-3824


Elektroteknik och elektronik