Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
project report helper
Active In SP

Posts: 2,270
Joined: Sep 2010
12-10-2010, 11:00 AM


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


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 television transmission broadcast systems. The analog format for these systems for MW and SW is simple full carrier 100% AM with no phase modulation. For vestigial sideband television, and any of the X-QAMs, X-VSBs or any other digital format requiring both AM and PM to describe the envelope vector of the modulated signal, simultaneous AM and PM are required. This paper presents a modern approach to digitally synthesized analog amplitude modulation boasting very high power efficiency, and linearity which is only a function of quantization error. This is the first of two papers on Digital Amplitude Modulation and Digital Linear Amplification where all non-orthogonal multiple carrier formats, digital or analog, are transmitted by RF or microwave by means of analog wave-form modulation. Saturated class C amplifiers are used as binarily related carrier power sources each connected to one input of a set of 3 dB power combiners arranged such that the output of the (n-1)th combiner feeds the other input of the nth combiner. Linear amplitude modulation takes place in the array of power combiners as amplifiers feeding the array are gated on or off according to the bit content of the digitized baseband modulation signal as sampled by means of an analog to digital converter. Modulation is absolutely linear with no flat topping, differential gain or phase or incidental carrier phase modulation. The only source of distortion is the quantization error. The spurious free dynamic range is dictated by the A/D converter used.

for more information about the :- and implimentations/lf/DIGITALMODULATOR.PDF

Important Note..!

If you are not satisfied with above reply ,..Please


So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page
Tagged Pages: paper presentation of amplitude modulation, design of amplitude modulation, seminar topics for digital modulation, seminar report on amplitude modulation, paper presentation on amplitude modulation, project report on amplitude modulator, project topics in am modulation,
Popular Searches: paper presentation of amplitude modulation, seminar on pulse amplitude, use of pin modulator in microwave, fm transmitter amplitude, modulator adblue price, pdf on amplitude zone time epoch coding, mini projects on am modulator applications,

Quick Reply
Type your reply to this message here.

Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  reactance modulator wikipedia jaseelati 0 208 17-01-2015, 01:19 PM
Last Post: jaseelati
  digital parking system project abstract jaseelati 0 728 15-01-2015, 02:42 PM
Last Post: jaseelati
  how to check eb reading in digital meter in tamilnadu jaseelati 0 261 27-12-2014, 01:53 PM
Last Post: jaseelati
  digital vehicle speedometer with password enabled speed limit setting jaseelati 0 274 23-12-2014, 02:21 PM
Last Post: jaseelati
  digital vehicle speedometer with password enabled speed limit setting jaseelati 0 281 20-12-2014, 01:55 PM
Last Post: jaseelati
  future scope of digital clock jaseelati 0 392 13-12-2014, 02:37 PM
Last Post: jaseelati
  digital frequency meter ppt jaseelati 0 319 11-12-2014, 04:34 PM
Last Post: jaseelati
  DIGITAL BROADCASTING PPT seminar ideas 2 1,000 08-03-2014, 02:23 PM
Last Post: seminar project topic
  Digital Signature ppt seminar ideas 2 1,401 30-09-2013, 04:47 PM
Last Post: seminar projects maker
  scope of digital signal processing full report computer science technology 3 6,009 27-09-2013, 09:36 AM
Last Post: seminar projects maker