Direct Digital Modulation Converter (DDMC)

Abstract

This report describes the prototype of a Direct Digital Modulation Converter (DDMC). The codes considered are PCM (pulse code modulation) and delta modulation with sampling frequencies of 16, 19.2, 32, 38.4 for the later. The objective is to convert from one form of digitized voice signal to another without reconstruction of the original analog signal. The results obtained indicate that DDMC's can be designed with characteristics as good as the existing analog means for converting between different codes. The prototype herein uses serial operation and is built with TIL Logic. It works with a CVSD operating at four different frequencies and in connection with five different PCM channel banks.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1976
Accession Number
ADB009754

Entities

People

  • Hubert Stephenne
  • Michel Villeret

Organizations

  • University of Sherbrooke

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Analog Signals
  • Communication Systems
  • Communications Techniques
  • Computer Simulations
  • Converters
  • Delta Modulation
  • Demodulators
  • Detectors
  • Floating Point Operations
  • Frequency
  • Logic Gates
  • Modulation
  • Modulators
  • Plastic Explosives
  • Power Supplies
  • Pulse Code Modulation
  • Test And Evaluation

Readers

  • Computer Engineering
  • Radio communications and signal processing.