Adaptive identifying signal detector

Details Adaptive identifying signal detector Adaptive identifying signal detector

1989-11-03

1991-05-28

Kuntz, Curtis

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455194, 455213, 455221, H04B 110, H04B 116

Patent

active

050201417

ABSTRACT:
A radio receiver capable of receiving more than one channel, one of which channels may be a priority channel, wherein some communications may be accompanied by a sub-audible continuous identifying signal, which signal can be detected by the radio in an adaptive way. In particular, a wideband, rapid detect approach can be utilized in the absence of a determination that adjacent identifying signals are present. To the extent such adjacent signals are present, the radio selects a narrowband, slower detection approach, or, in the alternative, shifts the bandpass characteristics of the wideband approach in an attempt to avoid the adjacent interfering signal.

REFERENCES:
patent: 4356568 (1982-10-01), Ogita et al.
patent: 4414689 (1983-11-01), Enderson
patent: 4429279 (1984-01-01), Wycoff et al.
patent: 4479250 (1984-10-01), Flood
patent: 4517561 (1985-05-01), Burke et al.
patent: 4525867 (1985-06-01), Shiratani
patent: 4554677 (1985-11-01), Smith
patent: 4718116 (1988-01-01), Jacobs et al.

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