Carrier regeneration device correctly operable in mobile satelli

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

1990-11-09

1992-09-15

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

329306, H04L 2706

Patent

active

051484510

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 (16) quadrature demodulates the input signal into an output signal. A cross-correlating circuit (23) calculates a cross-correlation coefficient between the output signal and a locally known unique word. A frame synchronizing circuit (24) compares the cross-correlation coefficient with a predetermined threshold value and delivers an aperture when the cross-correlation coefficient is below the predetermined threshold value. A phase calculating circuit (25) calculates phase errors between a recovered carrier signal recovered from the output signal and a regenerated carrier signal which is a correct reproduction of the carrier signal. The phase errors are set in a carrier regenerating circuit (17) to render the recovered carrier signal identical with the regenerated carrier signal at the aperture interval. Preferably, a frequency calculating circuit calculates frequency errors between the recovered and the regenerated carrier signals for use in making the recovered carrier signal identical with the regenerated carrier signal not only as regards phase but also as regards frequency.

REFERENCES:
patent: 4253189 (1981-02-01), Lemoussu et al.
patent: 4426712 (1984-01-01), Gorski-Popiel
patent: 4485477 (1984-11-01), Nossen
patent: 4538280 (1985-08-01), Mosley, Jr. et al.

Affiliated with

Also associated with

Rating

Carrier regeneration 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 regeneration 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 regeneration device correctly operable in mobile satelli will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-742597