Phase demodulator selectively using a first or a second detector

Details Phase demodulator selectively using a first or a second detector Phase demodulator selectively using a first or a second detector

1996-10-16

1998-08-11

Grimm, Siegfried H.

Demodulators

Phase shift keying or quadrature amplitude demodulator

Input signal combined with local oscillator or carrier...

329346, 375327, 375329, H04L 27227

Patent

active

057932506

ABSTRACT:
A demodulator for radio data communications is provided, which is capable of an optimum demodulation operation in response to the environmental condition under which communications are made independent of the preamble length. A phase angle calculator calculates a phase angle of the input signal. A frequency offset calculator calculates an offset of a carrier frequency of the input signal. A PLL generates a compensated phase angle of the input signal to compensate the frequency offset. A first detector detects the input signal using the uncompensated phase angle to generate a first detected signal. A second detector detects the input signal using the compensated phase angle to generate a second detected signal. A first phase distortion calculator calculates a phase distortion of the first detected signal. A second phase distortion calculator calculates a phase distortion of the second detected signal. A phase distortion comparator compares the phase distortions of the first and second detected signals to generate a result signal. A selector selects an output from one of the first and second detectors according to the result signal.

REFERENCES:
patent: 5440587 (1995-08-01), Ishikawa et al.
patent: 5533060 (1996-07-01), Kameo et al.

Affiliated with

Also associated with

Rating

Phase demodulator selectively using a first or a second detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase demodulator selectively using a first or a second detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase demodulator selectively using a first or a second detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-392782