A Time/Frequency Spectral Based Approach to Filtering

Abstract

This report describes a new filtering approach suitable for demodulating narrowband signals captured in digital wideband data. The new approach is based on generating the filtered and downconverted baseband signals using time/frequency spectral data, rather than the input wideband data. For communications electronic support measures systems, this spectral data will normally be generated to facilitate signal detection and parameter estimation (i.e. frequency, bandwidth, bearing, etc.). Hence the new approach is able to take good advantage of this to reduce the overall number of computations. Through comparisons with more traditional FIR filtering techniques, it is shown that the new spectral filtering approach is computationally more efficient when multiple signals are to be simultaneously demodulated.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2005
Accession Number
AD1003547

Entities

People

  • William J. Read

Tags

Communities of Interest

  • Energy and Power Technologies
  • Human Systems
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Bandwidth
  • Classification
  • Computations
  • Detection
  • Digital Signal Processing
  • Electronic Support Measures
  • Filters
  • Filtration
  • Frequency
  • Frequency Bands
  • Frequency Domain
  • Frequency Response
  • Narrowband
  • Security
  • Signal Detection
  • Signal Processing
  • Time Domain

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Optical Physics and Photonics.
  • Radar Systems Engineering.

Technology Areas

  • Microelectronics