Process and method for wide band transmission, particularly for data transmission over an electricity distribution network

Patent 4763103 Issued on August 9, 1988. Estimated Expiration Date:

February 13, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Assignee

Enertec

Application

No. 06/829055 filed on 02/13/1986

US Classes:

375/145, Having specific signaling for code synchronization340/310.12, Modulation technique370/479, Combining or distributing information via code word channels375/130SPREAD SPECTRUM

Examiners

Primary: Caldwell, Sr., John W.
Assistant: Fatahi-yar, Mahmoud

International Classes

H04B 3/54 (20060101)
H04L 1/02 (20060101)
H02J 13/00 (20060101)

Foreign Application Priority Data

1985-02-14 FR

Abstract

At transmission (10) each bit for transmission is coded as a function of its state by producing (12) a particular coding frequency combination, these being divided into two distinct bands spaced one from another and the coding combinations being chosen such that frequencies ranked in the same sequence place in these combinations do not occupy the same frequency band. A signal comprising the coding combination is injected to the network (N,P) and at reception (20), is applied to demodulators (22, 23), each assigned to one respective frequency band, to be correlated with locally generated signals (25, 26) which reproduce the coding combinations with a constant frequency shift, the bit state being determined (24) as a function of the correlation output.