Coherent signal detector for AM-compatible digital audio broadca

Details Coherent signal detector for AM-compatible digital audio broadca Coherent signal detector for AM-compatible digital audio broadca

1997-02-21

1999-03-02

Chan, Jason

Pulse or digital communications

Receivers

Angle modulation

329304, 375261, H03D 322

Patent

active

058780890

ABSTRACT:
A coherent signal detector for extracting analog and digital information from a received AM-compatible digital broadcast waveform is provided. The waveform can have an in-phase component and a quadrature component. The detector can include a down converter for shifting the in-phase and quadrature components in phase, frequency, or both, in response to a phase word, thereby providing a recovered in-phase output and a recovered quadrature output. The signal detector also includes an integration circuit for integrating a portion of the recovered quadrature output over a first preselected time interval, which can be one digital time frame.

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