Carrier regenerating device correctly operable in mobile satelli

Details Carrier regenerating device correctly operable in mobile satelli Carrier regenerating device correctly operable in mobile satelli

1993-02-17

1994-11-08

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375 86, 329304, 455215, 455306, H04L 2706

Patent

active

053634152

ABSTRACT:
Supplied with an input signal into which a carrier signal is modulated at a frame period by a data signal and unique words periodically interspersed throughout the data signal, a demodulating circuit (14) demodulates the input signal into a demodulated signal. A frame synchronizing circuit (23) produces an aperture signal which defines an aperture interval determined by the frame period when the demodulated signal has a level which is lower than a predetermined threshold level. Responsive to the aperture signal, a cross-correlating circuit (24) calculates a cross-correlation coefficient between the demodulated signal and a locally known unique word. By the use of the cross-correlation coefficient, a phase error calculating circuit (25) calculates a phase error between a reproduced carrier signal reproduced from the demodulated signal and a regenerated carrier signal which is a correct regeneration of the carrier signal. By the use of the cross-correlation coefficient and the demodulated signal, a frequency error calculating section (31-35) calculates a frequency error between the reproduced carrier signal and the regenerated carrier signal. A carrier regenerating circuit (15) makes the reproduced carrier signal become the regenerated carrier signal in accordance with the phase error and the frequency error.

REFERENCES:
patent: 4514855 (1985-04-01), Lang et al.
patent: 5012491 (1991-04-01), Iwasaki
patent: 5148451 (1992-09-01), Otani et al.
patent: 5276710 (1994-01-01), Iwasaki

Affiliated with

Also associated with

Rating

Carrier regenerating device correctly operable in mobile satelli does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Carrier regenerating device correctly operable in mobile satelli, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carrier regenerating device correctly operable in mobile satelli will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1788916