Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Improving Amplify-and-Forward Relay Networks: Optimal Power Allocation versus Selection
 

Summary: Improving Amplify-and-Forward Relay Networks:
Optimal Power Allocation versus Selection
Yi Zhao, Raviraj Adve and Teng Joon Lim
Dept. of Electrical and Computer Engineering,
University of Toronto,
M5S3G4, Canada.
E-mail: zhaoyi, rsadve, limtj@comm.utoronto.ca.
Abstract-- We consider an Amplify-and-Forward (AF) cooper-
ative diversity system where a source node communicates with
a destination node with the help of multiple relay nodes. The
conventional system assumes all relay nodes participate, with
the available channel and power resources equally distributed
over all nodes. This approach being clearly sub-optimal, we first
present an optimal power allocation scheme to maximize the
system throughput for an AF system. The main contribution in
this paper is a new selection scheme where only one, the "best"
relay node is chosen to participate in the transmission. We show
that at reasonable power levels the selection AF scheme maintains
full diversity order, and has significantly better outage behavior
and average throughput than the conventional scheme or that

  

Source: Adve, Raviraj - Department of Electrical and Computer Engineering, University of Toronto

 

Collections: Engineering