H - Electricity – 04 – B
Patent
H - Electricity
04
B
324/36, 325/93
H04B 1/16 (2006.01) H03J 7/32 (2006.01) H04B 17/00 (2006.01) H04L 27/00 (2006.01)
Patent
CA 1187944
ABSTRACT OF THE DISCLOSURE The specification describes a method and an apparatus for surveilling RF signals, the apparatus comprising a receiver for receiving RF signals at a selectively variable reception frequency and converting any signal received at that frequency to a predeter- mined IF signal, sampling means for sampling the IF signal and providing output signals representative of a plurality of predeter- mined properties of the received signal; means for comparing the representative output signals against a plurality of sets of reference signals each of which is representative of a particular modulation type and providing a first output indicative of the type of modulation of the received signal when the representative signals substantially match the set of reference values of one of the modulation types and a second output indicative of an unidentified received signal when the representative signals do not match any of the sets of reference signals.
411482
Her Majesty The Queen In Right Of Canada As Represented By The M
Mcfadden Fincham
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