Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/5577
Title: A time domain channel estimation scheme for equalize-and-forward relay-assisted systems
Author: Neves, D.
Ribeiro, C.
Silva, A.
Gameiro, A.
Keywords: Cooperative schemes
Equalize-and-forward/estimate-and-forward relaying protocol
OFDM systems
Pilot-aided channel estimation
Channel estimate
Cooperative schemes
Forward relaying
OFDM systems
Pilot-aided channel estimation
Relay node
Single antenna
Time domain
User terminals
Antenna arrays
Mobile telecommunication systems
Orthogonal frequency division multiplexing
Orthogonal functions
Wimax
Estimation
Issue Date: 2010
Publisher: IEEE
Abstract: In this paper we propose a scheme with a dedicated relay node for an OFDM-based system. We consider an antenna array at the base station and a single antenna at both the user terminal and the relay node. The relay-assisted protocol considered is equalize-and-forward. The proposed scheme requires the computation of parameters which depend on unknown variables at the destination and we show that under some assumptions the scheme is suitable to provide all those requirements. Also, we show that since the pilots at the relay node are properly designed the TD-MMSE estimator can still provide the required channel estimate. The system performance is evaluated by considering a typical pedestrian scenario based on WiMAX specification. The results show that the degradation in the estimator performance is negligible. ©2010 IEEE.
Peer review: yes
URI: http://hdl.handle.net/10773/5577
ISBN: 978-1-4244-3573-9
ISSN: 1090-3038
Appears in Collections:DETI - Comunicações

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