Limiting of Signals in Random Noise

Abstract

The effect of ideal bandpass limiting on a signal lying in narrowband Gaussian noise is analyzed. General analytic expressions for the limiter output components are derived using an integral representation for the limiter characteristic. This method allows retention of the phases of all the signals and the intermodulation products at the limiter output, which are destroyed in the characteristic- function method generally used in limiter studies. Expressions for the desired signals and intermodulation product amplitudes are obtained for the case when the limiter input consists of three angle-modulated sinusoids and noise. The analysis is extended to n modulated sinusoids plus noise, and approximate expressions for the signal, intermodulation product, and noise terms are derived. Numerical results are presented for the signal suppression and the limiter output signal amplitudes for the case of three input signals, two of equal amplitude.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1972
Accession Number
ADA425520

Entities

People

  • Pravin C. Jain

Organizations

  • SRI International

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplitude
  • Asymptotic Series
  • Bandpass Filters
  • Bessel Functions
  • Coefficients
  • Contour Integrals
  • Filters
  • Frequency
  • Frequency Domain
  • Gaussian Noise
  • Hypergeometric Functions
  • Information Theory
  • Integrals
  • Intermodulation
  • Modulation
  • Narrowband
  • Time Domain

Fields of Study

  • Engineering

Readers

  • Calculus or Mathematical Analysis
  • Microwave Engineering.
  • Radio communications and signal processing.