CORRELATORS FOR SIGNAL RECEPTION

Abstract

Study was undertaken to investigate the application of correlation techniques to acoustic receiving systems. Correlators (multiplier-averagers) were analyzed and compared with detectors (rectifier-averagers) of various power laws from the standpoint of their use in signal reception systems. Comparison was made in terms of S/N ratio for the limiting case of small input S/N ratio and long averaging time. Of the various detectors, the square law appeared somewhat superior for determining the presence of a small signal in a noise background. When 2 samples of the signal in incoherent background noises were available, the correlator showed the advantage that no constant terms independent of the signal appear at its output. Analysis of 2 circuits, the polarity-coincidence and the linear rectifier correlators, showed that both of these were slightly inferior to true correlators in output S/N ratio.

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Document Details

Document Type
Technical Report
Publication Date
Sep 15, 1952
Accession Number
AD0003188

Entities

People

  • James J. Faran Jr.
  • Robert Hills Jr.

Organizations

  • Harvard University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Background Noise
  • Circuit Analysis
  • Correlation Techniques
  • Cross Correlation
  • Detection
  • Detectors
  • Diagrams
  • Electrical Engineering
  • Electronics
  • Engineering
  • Filters
  • Frequency
  • Information Theory
  • Measurement
  • Navy
  • Resonant Circuits
  • Tuned Circuits

Fields of Study

  • Physics

Readers

  • Radar Systems Engineering.