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Abstract
This thesis is concerned with the Digital Video Broadcasting for
Handheld terminals (DVB-H) system which represents the European
standard of such systems with an evaluation of its performance.
Thesis starts with a complete overview on the DVB-H standard and
system then it focuses on the OFDM unit with all its specifications
mentioned in the standard with demonstration of the OFDM itself as a
modulation technique.
The different channel impairments that affect the propagating radio
signal specially if the receiver is a mobile one such as the propagation
loss, slow fading, fast fading, flat fading, frequency selective fading and
Doppler effect were discussed.
Various interpolation algorithms used for channel equalization such as
the linear, nearest, spline, second order Gaussian and 2D interpolations
were also represented.
The complete OFDM transmitter/receiver system is then simulated on
MATLAB according to the DVB-H standard specifications with a study
of the effect of the different channel impairments on its performance,
applying different interpolation methods used for channel equalization
with comparison between them. Also two algorithms for channel
estimation in DVB-H systems based on interpolation are proposed and
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they were found to outperform the previously known methods with
respect to the BER criterion.