Pilot-based Channel Estimation in OFDM Systems | Muhammad Saad Akram
| | Abstract | The 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. | | Type | Master's thesis [Academic thesis] | | Year | 2007 | | Publisher | Informatics and Mathematical Modelling, Technical University of Denmark, DTU | | Address | Richard Petersens Plads, Building 321, DK-2800 Kgs. Lyngby | | Series | IMM-Thesis-2007-73 | | Note | Supervised by Assoc. Prof. Ole Winther, IMM, DTU. | | Electronic version(s) | [pdf] | | BibTeX data | [bibtex] | | IMM Group(s) | Intelligent Signal Processing |
|