Spectral Analysis via Lag-Reshaping of the Correlation Estimate; Programs and Simulation Results

Abstract

The fundamental performance of the generalized spectral analysis technique employing quadratic frequency-smoothing of Fourier-transformed, overlapped, weighted data segments was thoroughly investigated analytically and reported. Possibility pointed out there was that of doing lag-reshaping of the first-stage correlation estimate, and thereby realizing effective spectral window with low sidelobes and good decay rates, without the need for overlap or any temporal weighting at all. However, no programs or simulation results. This situation is rectified by presenting programs for achieving maximally stable low-sidelobe spectral estimates via the lag-reshaping procedure and then employ these routines to exhibit some simulation results for data with tones and noise. In this report, attention is to the case of abutting rectangular temporal weightings with no overlap; this procedure, with appropriate lag-reshaping. Keywords: Effective window; FFT processing; Lag-reshaping; Lag weighting; Minimum execution time; Minimum variance.

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Document Details

Document Type
Technical Report
Publication Date
Aug 16, 1985
Accession Number
ADA162229

Entities

People

  • Albert H. Nuttall

Organizations

  • Naval Underwater Systems Center

Tags

Communities of Interest

  • Biomedical
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Autocorrelation
  • Bandwidth
  • Frequency
  • Frequency Bands
  • Frequency Domain
  • Information Science
  • Narrowband
  • Noise
  • Power Levels
  • Random Variables
  • Sequences
  • Sidelobes
  • Signal Processing
  • Simulations
  • Transfer Functions
  • White Noise

Readers

  • Approximation Theory.
  • Phased Array Antenna Design.