Quadratic Multiplexing--A New Method for Secure Communication.

Abstract

A secure digital multiplexing technique is presented which uses a pseudo-random process with a fundamental cycle length N. The method can handle D < N signal sequences of length M < N. The SNR's of the de-multiplexed signals is N/4DM for large N, even if the additive noise power is large. The de-multiplexer must compute the discrete Fourier transform of the pseudo-random sequence that is used to encode the signals. Information is carried in the phase differences between the frequency components of the multiplexed signal. De-multiplexing requires at least DMNlog2N arithmetic calculations. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1977
Accession Number
ADA048454

Entities

People

  • Melvin J. Hinich

Organizations

  • Virginia Tech

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Algorithms
  • Bandwidth
  • Channel Capacity
  • Computer Communications
  • Data Analysis
  • Digital Signal Processing
  • Discrete Fourier Transforms
  • Frequency
  • Multiplexing
  • Noise
  • Secure Communications
  • Sequences
  • Signal Processing
  • Speech Transmission
  • Statistical Analysis
  • Virginia
  • White Noise

Fields of Study

  • Engineering

Readers

  • Approximation Theory.
  • Image Processing and Computer Vision.