Wideband digital spectrometer
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United States of America Patent
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-
Oct 20, 1981
Grant Date -
N/A
app pub date -
Oct 11, 1979
filing date -
Oct 11, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a wideband digital spectrometer capable of obtaining the Fourier power spectrum of a combination of an input signal, using the Walsh functions. The input signal is low-pass filtered (10) at a cutoff frequency f.sub.c, then sampled at a rate of 2f.sub.c (12) to provide N sequences representative of the digitized input signal. Each one of the N sequences is combined with a separate one of the N Walsh functions (14), and the Walsh power spectrum of each one of these N combinations is then computed (16). These N Walsh power spectrum components are applied to an N.times.N Walsh-Fourier power transformer (18) which generates the desired N Fourier power spectrum components.
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