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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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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In the last sixty years we’ve evolved from radio, to black and white TV, to color TV, to cable TV and the satellite TV universe. Now that opportunity is expanding even further with TV on mobile phones, representing the ability to reach millions of consumers in new ways. Mobile digital broadcast TV combines the two best-selling consumer products in history-TVs and mobile phones. Indeed, TV will be the ingredient that drives demand for the next generation of wireless mobile phones because consumers want both communications and entertainment a ....etc

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In the last sixty years we?ve evolved from radio, to black and white TV, to color TV, to cable TV and the satellite TV universe. Now that opportunity is expanding even further with TV on mobile phones, representing the ability to reach millions of consumers in new ways. Mobile digital broadcast TV combines the two best-selling consumer products in history-TVs and mobile phones. Indeed, TV will be the ingredient that drives demand for the next generation of wireless mobile phones because consumers want both communications and entertainment all i ....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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Digital Video Broadcasting

Abstract :

DVB, short for Digital Video Broadcasting, is a suite of internationally accepted, open standards for digital television maintained by the DVB project, an industry consortium with more than 270 members, and published by a Joint Technical Committee (JTC) of European Telecommunications Standards Institute (ETSI), European Committee for Electro technical Standardization (CENELEC) and European Broadcasting Union (EBU).
Digital Video Broadcasting (DVB) is a set of standards that define digital broadcast ....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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how can i design am demodulator and modoulator using microcontroller?
please help me.
Tnx. ....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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ABSTRACT:

OFDM
otherwise called orthogonal frequency division multiplexing is a modulation and a multiple access technique that can be applied to mobile communications.
OFDM or Multitone modulation as it is sometimes called is the basis for several commercial wireless applications. In OFDM the segments are according to frequency there by dividing the spectrum into a number of equally spaced tones, which are orthogonal with each other and carries a portion of user information ....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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Variants of Military Communications
ABSTRACT

In present world as the methods of warfare is changing along with it communications are also changing to stay in contact with the military units fighting scattered all over the world. In this paper we will discus the different possibilities for military communications and their pros and cons in war or war-like environment.
1)INTRODUCTION

If we study the history of conflicts we will see that in early days emphasis was made on the number of soldiers in an army, larger the army more effectively ....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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....etc

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MOBILE IPTV
Approaches, CHALLENGES,STANDARDS,
AND QoS SUPPORT


Presented by : Satheesh Kumar B
No:55
S7 AE&I
College Of Engineering , Trivandrum



OVERVIEW
INTRODUCTION
WHAT IS IPTV ?
MOBILE IPTV
TECHNICAL ASPECTS OF MOBILE IPTV.
STANDARDISATION.
QoS SUPPORT.
CONCLUSION & FUTURE WORK.


INTRODUCTION
IPTV-The reinvention of televsion

WHAT IS IPTV?
It is a technology that delivers video or TV broadcasts over the Internet.
Internet TV, in simple ter ....etc

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Wireless Internet over LMDS: Architecture and Experimental Implementation
ABSTRACT

LMDS is currently a promising emerging technology in broadband fixed wireless communications. Cellular structure, high data rates, and flexibility make it perfect for multimedia, digital television, and interactive services. These highbandwidth multimedia services received most of the research attention until lately. Until recently there has been a clear gap when considering UDP/TCP/IP and other data services over LMDS. In this article we examine the ramifica ....etc

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