Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Patent
1994-08-31
1995-11-14
Isen, Forester W.
Electrical audio signal processing systems and devices
Binaural and stereophonic
Broadcast or multiplex stereo
381 15, 455312, 4552351, 331 20, 331 25, H04H 500
Patent
active
054673992
ABSTRACT:
A digital radio receiver generates coherent signals for synchronous detection without use of a phase-locked loop by employing an adaptive notch filter to cancel the desired signal. The cancelling signal is employed as the coherent signal for synchronous detection. The invention obtains faster locking to the desired signal, a wider capture range, and more efficient software coding in a digital signal processing receiver.
REFERENCES:
patent: 4887297 (1989-12-01), Loughlin
patent: 4945313 (1990-07-01), Brilka et al.
patent: 5261004 (1993-11-01), Manlove et al.
patent: 5357574 (1994-10-01), Whitecar
Ford Motor Company
Isen Forester W.
May Roger L.
Mollon Mark L.
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