Second-Order Output Statistics of the Adaptive Line Enhancer.

Abstract

The adaptive line enhancer (ALE) is an adaptive digital filter designed to suppress uncorrelated components of its input, while passing any narrowband components with little attenuation. The purpose of this paper is to analyze the second-order output statistics of the ALE in steady-state operation, for input samples consisting of weak narrowband signals in white Gaussian noise. The ALE output is shown to be the sum of two uncorrelated components, one arising from optimum finite-lag Wiener filtering of the narrowband input components, and the other arising from the misadjustment error associated with the adaptation process. General expressions are given for the output autocorrelation function and power spectrum with arbitarary narrowband input signals, and the case of a single sinusoid in white noise is worked out as an example. Finally, the significance of these results to practical applications of the ALE is mentioned. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1977
Accession Number
ADA054011

Entities

People

  • J. R. Zeidler
  • J. T. Rickard

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Covariance
  • Data Science
  • Equations
  • Filters
  • Filtration
  • Frequency
  • Gain
  • Gaussian Noise
  • Mathematical Filters
  • Narrowband
  • Order Statistics
  • Power Spectra
  • Statistics
  • Steady State
  • Transfer Functions
  • White Noise

Fields of Study

  • Engineering

Readers

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  • Phased Array Antenna Design.