THE DIGITAL AMPLITUDE MODULATOR

Timothy P. Hulick, Ph.D., W9QQ
886 Brandon Lane
Schwenksville, PA 19473


Abstract.
This paper is the first of two presenting the Digital Amplitude Modulator and the Digital Linear Amplifier. One leads to the other with the Digital Amplitude Modulator the precursor and the first theorized. Linear amplitude modulation in very high power full carrier systems still requires rather large solid state or vacuum tube devices in Medium Wave (MW) and Short Wave (SW), telephone and VHF and UHF ....etc

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GMSK:
Gaussian Filtered Minimum Shift Keying
Gina Colangelo
EE194 - SDR
Topics
Background
Minimum Shift Keying (MSK)
Gaussian Filtering
Spectral Efficiency GMSK vs. MSK
Common Applications
Introduction
Digital modulation schemes are becoming increasingly important in wireless communication systems.
Using an unfiltered binary data stream to modulate an RF carrier will produce an RF spectrum of considerable bandwidth.
Techniques have been developed to minimize this bandwidth, improve spectral performance, and ease detection.
Bac ....etc

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Abstract:
frequency shift keying (FSK) is a method for representing digital data with analog signals by using a change in the frequency of the carrier to represent information. It is thus a type of modulation. FSK with two frequencies, corresponding to the digital values 0 and 1 (see diagram) is the primary method used by low-speed modems.FSK is a low performance type of digital modulation. Binary FSK is a form of constant amplitude angle modulation, ....etc

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I would be much grateful if u could let me view the paper as I am a graduate student trying to understand the nuances in digital communications. ....etc

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Matched Filtering and Digital Pulse Amplitude Modulation (PAM

Outline

Transmitting one bit at a time
Matched filtering
PAM system
Intersymbol interference
Communication performance
Bit error probability for binary signals
Symbol error probability for M-ary (multilevel) signals
Eye diagram
....etc

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Design a digital transmission system using PSK for the transmission and reception of
text messages. ....etc

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VMSK(very minimum shift keying modulation) ,for very minimum shift keying modulation, is one of the ultra narrow band modulation (UNBM) methods claimed to send high speed digital data through very low bandwidth (or narrowband) channels. ....etc

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PRESENTED BY
D.VENKATA KALYANA CHAKRAVARTHI


What is Bio-Inspired Technology ?
The technology which is the outcome of inspiration by the Biological organism
such as bees, dragonflies etc
Introduction
• Bioinspired Tech deals with development and control of Micro Air Vehicles(MAV)
• These look like normal insects
• MAVs have two wings and are made of Mylar films
These vary in size from 0.9-6 inch
The main source of power supply is solar energy
• These are mainly used for SPY purpos ....etc

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top 10 viva question on amplitude shift keying
top 10 viva wuetion for amplitude shift keying ....etc

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