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A Novel SFBC-OFDM Scheme for Doubly-Selective Channels

Summary: 1
A Novel SFBC-OFDM Scheme for
Doubly-Selective Channels
Sili Lu, Student Member, IEEE, Balachander Narasimhan, Student Member, IEEE
and Naofal Al-Dhahir, Fellow, IEEE
Abstract-- Effective Inter-carrier Interference (ICI) mitigation
for MIMO-OFDM requires accurate channel estimation which is
very challenging due to the large number and fast time-varying
nature of the channel parameters to be estimated using scattered
pilots. We present a novel SFBC-OFDM scheme for doubly-
selective channels and a reduced-complexity channel estimation
algorithm which exploits the banded and sparse structure of the
channel in the frequency and time-domains, respectively. Fur-
thermore, we design an FIR-MMSE ICI cancellation algorithm
for mobile SFBC-OFDM and demonstrate its effectiveness for
Digital Video Broadcasting-Handheld (DVB-H) systems.
Index Terms-- OFDM, SFBC, ICI, Doppler effect, Alamouti
Orthogonal Frequency Division Multiplexing (OFDM) is


Source: Al-Dhahir, Naofal - Department of Electrical Engineering, University of Texas at Dallas


Collections: Engineering