how can i design am demodulator and modoulator using microcontroller?
please help me.
Tnx. ....etc

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PLL is a good way to do FM demodulation in analogue domain ,A PLL system can be used to implement an FM demodulator. When a PLL is locked on an FM signal, the VCO tracks the instantaneous frequency of that signal. Since the VCO output tracks the FM signal, and the VCO input voltage is proportional to the VCO output frequency, then the VCO input will be equal to the demodulated signal.

see more http://freecircuitdiagram2009/09/17/pll-fm-demodulator/ (circuit diagram and more)

A disadvantage of the PLL technique is that it trickier to get ....etc

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An Application of Image Processing For EYE WRITER



ABSTRACT:-

My eyes make pictures, when they are shut. Said by a scholar and it is going to be true. Eye writer is a newly invented inexpensive device which gives the hope to the people who are suffering from a disease such as ALS to communicate. The disease is ALS (Amyotrophic lateral sclerosis) means the absence of muscle nourishment. The person who was affected by the disease can’t move any part of the body except the eyes. So with the help of m ....etc

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by using power of the mind its possible turn thoughts into action

for paralyzed patients, such as turning of the tv, stereo or lights

with brain waves. brain gate technology has to do with brain mappingA

bundle of wires as thick as a coaxial cable runs from a connector in

human scalp to a refrigerator-sized cart of electronic gear. Inside

his brain, a tiny array of microelectrodes picks up the cacophony of

his neural activity; processors recognize the patterns associated

with arm motions and tr ....etc

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ABSTRACT
The SATMODE system provides a revolutionary low cost solution for low data rate transmission over satellite, in support of interactive television services. This low cost is achieved through the introduction of constant envelope modulation, and efficient channel coding techniques. The SATMODE system specifications will be proposed as a new Cenelec standard in Europe. The lac k of an efficient and scalable return path has always limited true interactivity over satellite TV. Remote interactivity is the key element ....etc

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LOYOLA INSTITUTE OF TECHNOLOGY & MANAGEMENT
Department of Electronics and Communication Engineering
Technical Seminar on

GMSK DEMODULATOR USING COSTAS LOOP FOR SOFTWARE-DEFINED RADIO

ABSTRACT

DSP based implementation of Gaussian Minimum Shift Keying (GMSK) demodulator using Costas loop has been described. The demodulator consists of a Costas loop for carrier recovery, data recovery, and phase detection. For low data rates, ....etc

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ABSTRACT
In recent years, digital computer is becoming most appropriate tool to solve any engineering problem. In last two decades number of programs have been developed for computers in solving power system problems. Many of these programs deal with system load flow, short circuit currents, stability, and for control of power systems. The higher percentage of proper utility of computers in distribution systems saves engineering time and investment.
All the time the distribution engineer encounters th ....etc

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LOYOLA INSTITUTE OF TECHNOLOGY & MANAGEMENT
Department of Electronics and Communication Engineering
Technical Seminar on

GMSK DEMODULATOR USING COSTAS LOOP FOR SOFTWARE-DEFINED RADIO

ABSTRACT

DSP based implementation of Gaussian Minimum Shift Keying (GMSK) demodulator using Costas loop has been described. The demodulator consists of a Costas loop for carrier recovery, data recovery, and phase detection. For low data rates, ....etc

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1.0 Digital Modulation
Firstly, what do we mean by digital modulation? Typically the objective of a digital communication system is to transport digital data between two or more nodes.In radio
Communications this is usually achieved by adjusting a physical characteristic of a sinusoidal carrier, either the frequency, phase, amplitude or a combination thereof. This is performed in real systems with a modulator at the transmitting end to impose the physical change to the carrier and a demodulator at the receiv ....etc

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Micro Controllers
(Cable Modems)


ABSTRACT

The present need to access internet in homes, offices, companies
etc in affordable way results in selection of efficient technology and
as a result cable modems are used. Cable modem technology brings high-
speed broadband networking to desired places through cable television
lines. Cable modems are devices that allow high-speed access to
information at a distant server may it be Internet server or video on
demand server, via a cable television ....etc

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ABSTRACT
A Brain-Computer interface is a device which enables people to interact with computer-based systems through conscious control of their thoughts. BCI is any system which can derive meaningful information directly from the userâ„¢s brain activity in real time. The current and the most important application of a BCI is the restoration of communication channel for patients with locked-in-syndrome. Most current BCIs are not invasive. The electrodes pick up the brainâ„¢s electrical activity and carry it into amplif ....etc

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Analysis of the Android Architecture

Deutsche Zusammenfassung
Die vorliegende Studienarbeit besch¨aftigt sich mit dem Android Betriebsystem
f¨ur mobile Systeme. Die Arbeit stellt das System grunds¨atzlich vor und zeigt an
einigen Stellen Besonderheiten und spezielle Anpassungen von Android auf.
Als Betriebsystem f¨ur mobile Systeme wie Smartphones und Tablets liegen bei
Android Schwerpunkte auf Energieeffizienz und Energieverwaltung. Diese Schwerpunkte
treten an vielen Stellen in den Vordergrund bei Designentscheidung ....etc

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ABSTRACT
Voice (and fax) service over cable networks is known as cable-based Internet Protocol (IP) telephony. Cable based IP telephony holds the promise of simplified and consolidated communication services provided by a single carrier at a lower cost than consumers currently to pay to separate Internet, television and telephony service providers. Cable operators have already worked through the technical challenges of providing Internet service and optimizing the existing bandwidth in their cable plants to deliver high ....etc

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