Method and apparatus for distinguishing narrowband continuous wa

Details Method and apparatus for distinguishing narrowband continuous wa Method and apparatus for distinguishing narrowband continuous wa

1989-04-28

1991-11-12

Teska, Kevin J.

Boots, shoes, and leggings

324 77B, 364487, 364572, G01R 2316, G06F 1520

Patent

active

050653342

ABSTRACT:
Received signals preferably have a stable frequency spectrum over a frequency span derived from a resolution bandpass filter. Furthermore, the frequency span has a plurality of discrete frequency measurements across the frequency span. It is desired to determine which of the discrete frequencies correspond to peaks in the frequency spectrum. Each peak is integrated to initially determine which of the peaks are from narrowband continuous wave signals by comparing the aspect ratio of the peaks with the aspect ratio of a resolution bandpass filter. Those peaks which fail the aspect ratio test are discarded from the frequency spectrum. The remaining peaks are then fitted to a second order polynomial curve to finally determine whether they are due to narrowband continuous wave signals. The peaks which do not fit the curve are labeled as broadband.

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