automatic image equalization and contrast enhancement using gaussian mixture ....etc

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Presented by:
KALPANA.B,
KANNAN. M,
MURALI. B.


MAP EQUALIZATION AND DECODING IN WIRELESS MOBILE CODED OFDM
OBJECTIVE
 OFDM suffers extra performance degradation in multi path channels due to ICI
 Bit error rate(BER) increases with this ICI
 To reduce the BER suitable equalizer is needed.
 That equalizer should not limit the advantages of OFDM
OFDM
 Orthogonal Frequency Division Multiplexing (OFDM) is a special form of multi carrier modulation technique which is used to genera ....etc

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Here, the fast image contrast enhancement is achieved based on histogram equalization (HE) both for color images and the gray-level images. A process called Multi-HE is proposed for the gray-level images. In this method, the input image is decomposed into several sub-images and then the classical HE process is applied to each of the sub-images separately. Also two different discrepancy functions are proposed for the purpose of decomposing the input image. Many simulations have been run and they show that both these methods are better in preser ....etc

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Non linear analog circuits and its equalization techniques



INTRODUCTION


The confluence of Moore’s law and the maturation of the art of analog integrated circuit (IC) design has created a flurry of recent research and development work on digitally intelligent analog circuits. Exploiting high-density on-chip digital processing, the approach represents a trendy alternative to conventional hard-labored analog design methodology, in which the inescapab ....etc

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java source code for
Automatic Image Equalization And Contrast Enhancement Using Gaussian Mixture ....etc

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Performance analysis of channel estimation and adaptive equalization in slow fading channelPresented By:
Zhifeng Chen, Electrical and Computer Engineering, University of Florida
ABSTRACT
In our project, we first build up a wireless communication simulator including Gray coding, modulation, different channel models (AWGN, flat fading and frequency selective fading channels), channel estimation, adaptive equalization, and demodulation. Next, we test the ef ....etc

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IMPLEMENTATION OF PLATEAU HISTOGRAM EQUALIZATION ALGOROTHIM FOR IMAGE ENHANCEMENT USING MATLAB
INTRODUCTION TO IRDE
Instruments Research and Development Establishment (IRDE), a major equipment oriented establishment within Defence Research and Development organization, came into existence in its present form as an institute devoted exclusively to research and development in the field of instrumentation for the services on 1st December 1961. It, however, has an earlier history as a composite establishment perf ....etc

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Channel equalization


Introduction
In a communication system, the information is transmitted over a RF channel

The RF channel distorts the transmitted signal
Amplitude, frequency, phase are changed

A receiver should compensate the distortions to recover the transmitted signal
Channel equalization is the compensation process of the distortions in a RF transmission
In order to counter intersymbol interference effect, the observed signal is passed thr ....etc

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Channel Estimation & Equalization for WiMAX

Introduction

The Altera® channel estimation and equalization modules for mobile
worldwide interoperability for microwave access (WiMAX) can be used
to accelerate the development of mobile broadband wireless basestations
based on the IEEE 802.16e-2005 standard .
f For more information on IEEE 802.16e-2005, refer to the IEEE Standard for
Local and Metropolitan Area Networks Part 16: Air Interface for Fixed and
Mobile Broadband Wireless Access ....etc

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1 Introduction
Orthogonal frequency division multiplexing (OFDM) is widely used today due to it's robust-
ness to multipath e®ects and e±cient implementation using FFT. The most common one called
OFDM/QAM, which uses QAM as modulation and rectangular pulse as shaping ¯lter. For
OFDM/QAM, the robustness to multipath is attained by inserting guard interval. If the max-
imum delay of transmitting channel is less than guard interval, there exists neither intersymbol
interference (ISI) nor interchannel interference (ICI) . For di ....etc

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