System for synchronizing local pseudo-noise sequence to a receiv

Details System for synchronizing local pseudo-noise sequence to a receiv System for synchronizing local pseudo-noise sequence to a receiv

1974-11-21

1976-03-30

Mayer, Albert J.

Telegraphy

Systems

Line-clearing and circuit maintenance

325321, 331 78, H04L 700

Patent

active

039476340

ABSTRACT:
The present system generates a local PN (Pseudo Noise) sequence demodulation bit stream in synchronism with the modulation sequence of a received baseband signal. The system is comprised of a PN sequence generator for generating a local PN sequence signal in response to the pulse rate of a clock signal. A digital delay line generates early and late phases of the local PN sequence, which phases are correlated with the modulation sequence of the received signal. Early correlation causes pulses to be inserted into the train of clock pulses while late correlation causes pulses to be deleted from the train of clock pulses. A phase error less than a predetermined range (dead band) results in no adjustments to the train of clock pulses.

REFERENCES:
patent: 3402265 (1968-09-01), Couvillon
patent: 3514702 (1970-05-01), Nahay et al.
patent: 3777278 (1973-12-01), Majeau

Affiliated with

Also associated with

Rating

System for synchronizing local pseudo-noise sequence to a receiv does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for synchronizing local pseudo-noise sequence to a receiv, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for synchronizing local pseudo-noise sequence to a receiv will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-522131