Multiplex communications – Wide area network – Packet switching
Patent
1984-02-15
1985-07-16
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
375 37, H04J 312, H03K 1300, H04L 300
Patent
active
045300887
ABSTRACT:
A run-length-limited group coding system is provided wherein the code permits a high data transfer efficiency. Code values for both data and control functions are chosen such that the maximum cumulative DC deviation from a nominal center is no more than 10 percent averaged over a data transmission sequence. The code employed limits the maximum number of zero bits between successive one bits in a serial binary sequence to a predetermined value thereby permitting self-clocking. The coding system is particularly suitable for use in baseband data transmission systems where the transmission medium is either an electrical or optical link. Code values for control functions meet the same constraints as those for data and protocols are established such that the coding system may be integrated into a variety of multiple-unit system configurations wherein the communication between units is, for example, by way of a point-to-point link, or a bus, star, loop, or ring arrangement.
REFERENCES:
patent: 3689899 (1972-09-01), Franaszek
patent: 3701144 (1972-10-01), Fineran et al.
patent: 3810111 (1974-05-01), Patel
patent: 4063220 (1977-12-01), Metcalfe et al.
patent: 4234897 (1980-11-01), Miller
patent: 4345325 (1982-08-01), Gandini et al.
patent: 4347619 (1982-08-01), Dakin et al.
patent: 4366572 (1982-12-01), Takatsuki et al.
Horiguchi, T. and Morita, K., "An Optimization of Modulation Codes in Digital Recording," IEEE Transactions on Magnetics, vol. MAG-12, No. 6, Nov. 1976.
Hamstra James R.
Moulton Robert K.
Olms Douglas W.
Scutch III Frank M.
Sperry Corporation
LandOfFree
Group coding system for serial data transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Group coding system for serial data transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Group coding system for serial data transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1739613