1. Channel Estimation Schemes for OFDM Relay-Assisted Systems
- Author
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Darlene M. Neves, Adão Silva, Carlos Ribeiro, and Atilio Gameiro
- Subjects
Least Square ,Engineering ,User terminals ,Amplify-and-forward ,Wireless communications ,Orthogonal frequency-division multiplexing ,Channel estimation ,Data_CODINGANDINFORMATIONTHEORY ,02 engineering and technology ,Relay based scenarios ,law.invention ,Base station ,0203 mechanical engineering ,Relay ,law ,Computer Science::Networking and Internet Architecture ,0202 electrical engineering, electronic engineering, information engineering ,Electronic engineering ,Wireless telecommunication systems ,Wireless ,Minimum mean square errors ,Wireless networks ,Computer Science::Information Theory ,Single antenna ,Orthogonal frequency division multiplexing ,Minimum mean square error ,business.industry ,Wireless network ,Node (networking) ,Pilot-aided channel estimation ,ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS ,020302 automobile design & engineering ,020206 networking & telecommunications ,Cooperative systems ,OFDM systems ,Mobile telecommunication systems ,Relay node ,business ,Estimation ,Communication channel ,Computer network - 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. European CODIV project (ref. FP7-ICT-2007-215477) Portuguese Foundation for Science and Technology (FCT)
- Published
- 2009
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