Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10773/8295
Título: | On the impact of the pilot density in the channel estimation of MC-CDMA systems |
Autor: | Ribeiro, C. Gameiro, A. |
Data: | 2007 |
Editora: | IEEE |
Resumo: | In this paper we investigate the impact of the pilot density (and associated pilot distances for both frequency and time domains) in the performance of the channel estimation for MC-CDMA systems, when using dedicated sub-carriers to transmit pilots with 2-D rectangular patterns. The analytical formulation of the channel estimation MSE for the single-user downlink scenario with a generic channel estimation scheme for a given power efficiency is presented. The attained results go beyond the commonly accepted rule of thumb that suggests that an oversampling factor of two will result in a good trade-off between performance and pilot overhead. The analytical formulation was validated by system simulations. A scenario using the 2-D LS-DFT channel estimation scheme confirmed the analytical result. The lowest channel estimation MSE for a given value of power efficiency is achieved when the pilot density is the one that closely fulfils the 2-D sampling theorem. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/8295 |
DOI: | 10.1109/ISWCS.2007.4392446 |
ISBN: | 978-1-4244-0979-2 |
Versão do Editor: | http://www.scopus.com/inward/record.url?eid=2-s2.0-46449124484&partnerID=40&md5=9a6e23714df9734cc33bff1b95900438 |
Aparece nas coleções: | DETI - Comunicações |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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ISWCS_final_camera_ready_CRibeiro_6.pdf | 275.81 kB | Adobe PDF | Ver/Abrir |
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