Accession Number:

ADD020190

Title:

Narrowband Signal Processor

Descriptive Note:

Patent Application, Filed 20 Apr 2000

Corporate Author:

NAVAL UNDERSEA WARFARE CENTER DIV NEWPORT RI

Personal Author(s):

Report Date:

2000-04-20

Pagination or Media Count:

22.0

Abstract:

A method to process narrowband signals includes dividing the input signal into segments of length N, where N optimizes the systems filter bandwidth, Fast Fourier Transform FFT size, processing capabilities and memory constraints. Each N-length segment is processed sequentially by filtering, a FFT and a peak detector that identifies the N-length segments K largest spectral components. The frequency, bandwidth and power for the K largest spectral components are stored sequentially as N- processed data. After processing multiple N-length segments, processing intervals of length NxJ are obtained by sequentially reconstructing individual frequency spectrums for J continuous segments of the N-processed data, mapping the J reconstructed spectrums to a single composite spectrum, and applying the peak detector to the composite spectrum to separately store the composite spectrums K largest frequencies, with respective powers and bandwidths, as NxJ-processed data. The N-length data is continually processed in groups of J until all N-length data is reprocessed. J may have multiple values, thereby generating multiple processed data sets.

Subject Categories:

  • Numerical Mathematics
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE