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Communication Dans Un Congrès Année : 2012

Improved Channel Estimation Methods based on PN sequence for TDS-OFDM

Résumé

An accurate channel estimation is crucial for the novel time domain synchronous orthogonal frequency-division multiplexing (TDS-OFDM) scheme in which pseudo noise (PN) sequences serve as both guard intervals (GI) for OFDM data symbols and training sequences for synchronization/channel estimation. This paper studies the channel estimation method based on the cross-correlation of PN sequences. A theoretical analysis of this estimator is conducted and several improved estimators are then proposed to reduce the estimation error floor encountered by the PN-correlation-based estimator. It is shown through mathematical derivations and simulations that the new estimators approach or even achieve the Cramer-Rao bound.
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Dates et versions

hal-00763450 , version 1 (10-12-2012)

Identifiants

Citer

Ming Liu, Matthieu Crussière, Jean-François Hélard. Improved Channel Estimation Methods based on PN sequence for TDS-OFDM. 19th International Conference on Telecommunications (ICT), Apr 2012, Jounieh, Lebanon. pp.1-5, ⟨10.1109/ICTEL.2012.6221259⟩. ⟨hal-00763450⟩
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