Amplitude &Frequency Modulation



Modulation Methods

In the modulation process, some characteristic of a high-frequency
sinusoidal carrier is changed in direct proportion to the instantaneous
amplitude of the baseband signal. The carrier itself can be
described by the equation

Zero Span and Markers

One possibility, if the percent modulation is high enough, is
to use the analyzer as a fixed-tuned receiver, demodulate
the signal using the envelope detector of the analyzer, view
th ....etc

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A High Data Rate Frequency Hopping Modulation Scheme
Theme:ECE/Digital Communications

Submited By:
Hemanth Patnala
R.V.Seshu Kumar
Sir C.R.R. College Of Engineering,
Eluru-534002
ABSTRACT
There is a need to select the 'first step up' modulation scheme for higher data rate frequency hopping systems. This is seen as one step in a longer journey where considerably higher data rates are used. In order to make this progression viable, the first step should be taken with a well proven modulation scheme. An ....etc

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to get information about the topicIR AND ZIGBEE TO-ZIGBEE DEVICE CONTROL SCHEME FOR SINGLE MEDIA MULTI DEVICESrefer the page link bellow

http://seminarsprojects.in/attachment.php?aid=6411 ....etc

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dear sir,

i want to automatic railway gate controller using frequency

modulation techniques in iee format. please request you to send the iee

format of automatic railway gate controller using frequency modulation

techniques.

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To get full information or details of frequency modulation and demodulation ppt please have a look on the pages

https://en.wikipedia?title=Frequency_modulation

http://radio-electronicsinfo/rf-technology-design/fm-reception/fm-demodulation-detection-overview.php

http://ece.umd.edu/ tretter/commlab/c6713slides/ch8.pdf

if you again feel trouble on frequency modulation and demodulation ppt please reply in that page and ask specific fields in frequency modulation and demodulation ppt ....etc

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Frequency modulation

The fi rst public broadcast radio services introduced in the 1920s were in
the long-wave (LW) and then medium-wave (MW) band, using amplitude
modulation (AM) and limited by the technology of the time. Historically,
long- and medium-wave AM broadcasting has used restricted bandwidth,
approximately 4 kHz, which allows intelligible speech but is not very good
for music broadcasting, since music signals are typically 14 20 kHz in bandwidth.
Amplitude modulation also suffers from impul ....etc

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METHODS OF FREQUENCY MODULATION



METHODS OF FREQUENCY MODULATION. - The circuit shown earlier in figure 2-6 and the discussion in previous paragraphs were for illustrative purposes only. In reality, such a circuit would not be practical. However, the basic principle involved (the change in reactance of an oscillator circuit in accordance with the modulating voltage) constitutes one of the methods of developing a frequency-modulated wave.

Reactance-Tube Modulation. - In ....etc

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Remote device control using Radio Frequency

The project compares the communication of control signals using radio frequency
and Infra Red Rays. The STR is ideal for short-range remote control applications where
cost is a primary concern. The receiver module requires no external RF components
except for the antenna. It generates virtually no emissions, making FCC and ETSI
approvals easy. The super-regenerative design exhibits exceptional sensitivity at a very
low cost. A SAW filter can be added to the an ....etc

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