Time-varying interference suppression in communication systems using time-frequency signal transforms

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations


The Fourier transform (FT) is an analysis tool that is perfectly localized at sinusoidal frequencies. We present a FT generalization (GFT) as a 1-D transform of frequency-modulation (FM) rate. It is designed to be perfectly localized at the FM rate of signals with linear or non-linear instantaneous frequency in the time-frequency plane. We discuss various important GFT properties, implementation and aliasing issues, and provide examples. We successfully apply the GFT to suppress broadband linear FM interference in spread spectrum communication systems. We demonstrate that this new method also performs well for multicomponent interference, and has a computational advantage over other time-varying techniques. In addition, we show that some examples of the GFT are adequate in reducing dispersive interference in underwater and satellite communication systems.

Original languageEnglish (US)
Title of host publicationConference Record of the Asilomar Conference on Signals, Systems and Computers
Number of pages5
StatePublished - 2000
Event34th Asilomar Conference - Pacific Grove, CA, United States
Duration: Oct 29 2000Nov 1 2000


Other34th Asilomar Conference
Country/TerritoryUnited States
CityPacific Grove, CA

ASJC Scopus subject areas

  • Hardware and Architecture
  • Signal Processing
  • Electrical and Electronic Engineering


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