Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1985-09-26
1988-04-05
Griffin, Robert L.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455612, H04B 900
Patent
active
047364645
ABSTRACT:
A method for the additional transmission of information items via a digital auxiliary channel in an optical wave guide system for digital signal transmission, in which system electric signals, which are coded in a pseudo-ternary bipolar code, are converted into a redundant, binary line code and are transmitted in converted form via an optical wave guide. In each case one information unit of the information items is transmitted by modification of a selected bit pattern from the data stream present in line code. According to the method, the pseudo-ternary bipolar code is the HDB-3 code, the MCMI code is used as the line code, the bit sequences 110011 and 001100 are used as selected bit patterns and at least one of the bit sequences 011011, 100111 and 101101 is allocated as a modification to the bit sequence 110011, and at least one of the bit sequences 001001, 000110 and 010010 is allocated as a modification to the bit sequence 001100. The method is applied to the remote monitoring of an optical data transmission system including repeaters, which permits such monitoring to be implemented in an inexpensive and functionally reliable manner.
REFERENCES:
patent: 4337467 (1982-06-01), Tache
patent: 4449247 (1984-05-01), Waschka
patent: 4524462 (1985-06-01), Cottatelucci
patent: 4606028 (1986-08-01), Wagenmakers
Optical Line Codes Bearing Ancillary Channels, K. W. Cattermole and W. D. Grover, pp. 7/1 to 7/7.
Ein Lichtwellenleitersystem fur, etc. Josef Fluhr et al. (1983), Electronic Letters, Jul. 31, 1980, vol. 16, No. 16.
Philips Telecommunication Review, vol. 40, No. 2, Jul. 1982, Optical Transmission Equipment.
BBC Brown Boveri & Company Limited
Beek Leslie Van
Griffin Robert L.
LandOfFree
Method for the additional transmission of information via a digi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for the additional transmission of information via a digi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the additional transmission of information via a digi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2239536