Pilot-Assisted Channel Estimation for OMOAM Systems
Date Issued
2010
Date
2010
Author(s)
Chen, Kuo-Kuan
Abstract
In this thesis, the channel estimation technique of orthogonally-multiplexed orthogonal amplitude modulation (OMOAM) systems is investigated. Channel estimation plays an important role in the performance of coherent receivers due to multipath fading and Doppler effect in wireless transmission. In the literature, the channel estimation problem for OMOAM systems has not been researched yet. With the specific constraint of modulation parameter, we exploit the special signal structure and fast Fourier transform realization to propose a novel pilot-assisted channel estimation algorithm for OMOAM systems. This algorithm includes pilot insertion, subcarrier detection, channel estimation and two-stage suboptimum demodulation. The subcarrier detection error probability and MSE of channel estimation are also analyzed and verified by simulation. Finally, the simulation results of sub-optimum demodulation for different modulation parameters are compared and discussed in terms of bit error probability.
Subjects
orthogonally multiplexed orthogonal amplitude modulation
channel estimation
fast Fourier transform
sub-optimum demodulation
Type
thesis
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