الفهرس 
Image FundamentalsOnly 14 pages are availabe for public view
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Abstract
Image transmission through wireless channels may face severe adverse
conditions, especially, burst error conditions, where errors are likely to occur in
clusters caused by the multipath fading environment. To transmit data efficiently over
wireless channels and combat the problems caused by the multipath fading
environment, coding and interleaving techniques are required. There are several
primary interleaving techniques such as block interleaving and helical interleaving.
The performance of such simple interleavers is limited. So, there is a need for strong
interleavers.
Image Compression addresses the problem of reducing the amount of data
required to represent the digital image. Compression is achieved by the removal of
data redundancies. For the efficient transmission of an image across a channel, source
coding in the form of image compression at the transmitter side and image recovery at
the receiver side are the integral processes involved in any image communication
system. Other processes like channel coding, signal modulation at the transmitter side
and their corresponding inverse processes at the receiver side along with the channel
equalization help greatly in minimizing the Bit Error Rate (BER) due to the effect of noise and bandwidth limitations.
This thesis is devoted for the study of image transmission over wireless channels
with both Orthogonal Frequency Division Multiplexing (OFDM) and Multi-Carrier
Code Division Multiple Access (MC-CDMA). Both schemes are multi-carrier
schemes, which are adopted in current and future mobile generations. The thesis
presents a new chaotic interleaving scheme for efficient image transmission with both
schemes. It also presents a study for the equalization process. Raw and compressed
images are considered in this study. Also, watermarked images are considered for the
efficient extraction of the watermark at the receiver. A comparison study between
OFDM and MC-CDMA for the transmission of images is presented in the thesis. The
simulation programming is made by matlab programming .