DocumentCode :
2524839
Title :
A Pilot-Data Based Channel Estimation Method for OFDM Relay-Assisted Systems
Author :
Neves, Darlene ; Ribeiro, Cassio ; Silva, Alonso ; Gameiro, Atilio
Author_Institution :
Inst. de Telecomun., Univ. de Aveiro, Aveiro, Portugal
fYear :
2011
fDate :
5-8 Sept. 2011
Firstpage :
1
Lastpage :
5
Abstract :
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-and- forward. 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 :
OFDM modulation; antenna arrays; channel estimation; cooperative communication; iterative methods; least mean squares methods; wireless channels; MMSE criterion; OFDM relay-assisted system; SFBC OFDM-based cooperative scenario; channel estimation MSE; data-aided iteration; data-based channel estimation scheme; double antenna array; equalise-and-forward method; equivalent channel; nondata-aided scheme; path base station; pilot-data based channel estimation method; relay node; single antenna device; user terminal; Antennas; Channel estimation; Estimation; Noise; OFDM; Protocols; Relays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2011 IEEE
Conference_Location :
San Francisco, CA
ISSN :
1090-3038
Print_ISBN :
978-1-4244-8328-0
Type :
conf
DOI :
10.1109/VETECF.2011.6093154
Filename :
6093154
Link To Document :
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