A Pilot-Data Based Channel Estimation Method for OFDM Relay-Assisted Systems

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

http://hdl.handle.net/10400.8/14459

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Abstract(s)

In this work we propose and evaluate a pilot and data-based channel estimation scheme for SFBC OFDM-based cooperative scenario. We consider that both the base station and the relay node are equipped with double antenna arrays whereas the user terminal is a single antenna device. The relay protocol considered is equalise-andforward. In this paper we propose a channel estimation method that iteratively uses the information carried by the pilots and data to improve the estimate of the equivalent channels for the path Base Station – Relay Node – User Terminal. The MMSE criterion is used in the design of the estimator for both the pilot-based and data-aided iterations. The proposed method is evaluated in terms of the channel estimation MSE and the results show that the proposed scheme allows, with a single data iteration, a reduction of the number of pilots by a factor of approximately two when compared with non-data-aided schemes.

Keywords

Pilot-data based estimator OFDM systems cooperative schemes and equalise-and-forward protocol.

URI

http://hdl.handle.net/10400.8/14459

Citation

D. Neves, C. Ribeiro, A. Silva and A. Gameiro, "A Pilot-Data Based Channel Estimation Method for OFDM Relay-Assisted Systems," 2011 IEEE Vehicular Technology Conference (VTC Fall), San Francisco, CA, USA, 2011, pp. 1-5, doi: 10.1109/VETECF.2011.6093154.