A Time Domain Channel Estimation Scheme for Equalize-and-Forward Relay-Assisted Systems

Neves, D.; Ribeiro, C.; Silva, A.; Gameiro, A.

http://hdl.handle.net/10400.8/14531

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A time domain channel estimation scheme for equalize-and-forward relay-assisted systems.pdf	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.	382.88 KB	Adobe PDF	Download

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Abstract(s)

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.

Description

Fonte: https://www.researchgate.net/publication/221640832_A_Time_Domain_Channel_Estimation_Scheme_for_Equalize-and-Forward_Relay-Assisted_Systems

Keywords

OFDM systems cooperative schemes Pilot– aided channel estimation equalize–and–forward/estimate–and– forward relaying protocol

URI

http://hdl.handle.net/10400.8/14531

Citation

D. Neves, C. Ribeiro, A. Silva and A. Gameiro, "A Time Domain Channel Estimation Scheme for Equalize-and-Forward Relay-Assisted Systems," 2010 IEEE 72nd Vehicular Technology Conference - Fall, Ottawa, ON, Canada, 2010, pp. 1-5, doi: https://doi.org/10.1109/VETECF.2010.5594290.