Correlation detector for FM signals

Details Correlation detector for FM signals Correlation detector for FM signals

1991-06-26

1992-01-14

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

For correlation

342200, 342378, G01S 7285

Patent

active

050814613

ABSTRACT:
Apparatus for detecting FM signals, such as from a radio altimeter, is disclosed. The apparatus contains a phase detector which has as inputs the received signal and a delayed replica of the input signal. The output of the phase detector is filtered in a filter bank, the outputs of which feed a logic circuit. The logic circuit selects the output with the largest signal level. If the selected output has a level exceeding a threshold, the presence of an FM signal is indicated.

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