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Title: Channel estimation schemes for OFDM relay-assisted systems
Author: Neves, Darlene
Ribeiro, Carlos
Silva, Adão
Gameiro, Atílio
Keywords: Cooperative systems
OFDM systems
Pilot-aided channel estimation
Relay based scenarios
Cooperative systems
Least Square
Minimum mean square errors
OFDM systems
Pilot-aided channel estimation
Relay based scenarios
Relay node
Single antenna
User terminals
Wireless communications
Mobile telecommunication systems
Orthogonal frequency division multiplexing
Wireless networks
Wireless telecommunication systems
Channel estimation
Issue Date: 2009
Publisher: IEEE
Abstract: The aim of this paper is to adapt and evaluate the performance of two classical pilot-aided channel estimation schemes designed for OFDM systems: least square and minimum mean square error, in a relay-assisted scenario. We consider the Amplify-and-Forward, which is the simplest relay protocol for cooperative systems. Also, we consider the use of a single antenna at all the terminals: base station, user terminal and relay node. In our scenario, it is assumed that some of the user terminals deployed in a certain area could act as relaying-able terminals for the communications of other users. In this communication we show that the classical channel estimation techniques designed for conventional wireless communications can be extended for relay-assisted based systems under some modifications. © 2009 IEEE.
Peer review: yes
ISBN: 978-1-4244-2517-4
ISSN: 1550-2252
Appears in Collections:DETI - Comunicações

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