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|Title:||Uplink channel estimation for multi-user OFDM-based systems|
Fernández-Getino Garcia, M.J.
Gil Jiménez, V.P.
García Armada, A.
|Abstract:||In this paper we propose a simple, yet flexible and efficient, channel estimator for the uplink in broadband orthogonal frequency division multiplexing (OFDM) systems. The processing is performed in the time-domain, by extracting the Channel’s Impulse Response (CIR) for each user from a joint training signal. In this OFDM system, the pilot sequence we advocate, where all users share the same pilot sub-carriers, consists of one OFDM-symbol endowed with time-shifted properties per user, which isolates each user’s CIR and is robust against multi-user interference. The feasibility of our approach is substantiated by system simulation results obtained using BRAN-A broadband mobile wireless channel model.|
|Appears in Collections:||DETI - Artigos|
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