Pilot-based Channel Estimation in OFDM Systems

Muhammad Saad Akram

AbstractThe channel estimation techniques for pilot-based OFDM systems are investigated. The channel estimation is studied for different pilot densities (2, 4, 6, and 10) in frequency-domain and fixed pilot allocation in temporal-domain for low delay spread and high delay spread channels. The estimation of channel in frequency-domain is based on interpolation, polynomial-based generalized linear model (or least-squares method) and Wiener filtering (or Linear Minimum Mean Square Error) methods. The estimation of channel in temporal-domain is done using linear interpolation. We have compared the performance of all these schemes by measuring raw bit-error-rate with QPSK modulation on Rayleigh fading channel based on Clarks scattering model.
TypeMaster's thesis [Academic thesis]
PublisherInformatics and Mathematical Modelling, Technical University of Denmark, DTU
AddressRichard Petersens Plads, Building 321, DK-2800 Kgs. Lyngby
NoteSupervised by Assoc. Prof. Ole Winther, IMM, DTU.
Electronic version(s)[pdf]
BibTeX data [bibtex]
IMM Group(s)Intelligent Signal Processing

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