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Patent US4263668A successfully refreshed from Google Patents.
US4263668A
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Method and circuit arrangement for full duplex two-wire transmission of a ternary data signal
Assignee: Siemens AG
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Filing: 1979-07-26
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Granted: 1981-04-21
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Expires: 1999-07-26
Abstract
Abstract Automatic digital simulation of a two-wire line is provided for the transmission of data in full duplex operation. Coefficients which signal the influence of ternary values on a received signal are stored in a plurality of sub-intervals of the individual ternary values and information are stored which signal the ternary values assigned to the coefficients. After a comparison of the received signal with the simulated signal, the coefficients are continuously corrected and the simulated signal is obtained by summing the coefficients.
Inventors
- 👤 Adolf Haass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:32
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/14; H04L5/1423
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
353 words
A method for full duplex two-wire transmission of a ternary data signal whose ternary values are formed of positive signal portions, negative signal portions and zero signal portions, in which disruptions of a received signal at a station by the transmission signal of the station are prevented with the assistance of a simulated signal, comprising the steps of: assigning c·d coefficients each having p bits to each ternary value of the ternary data signal, where c signifies a predetermined plurality of sub-intervals of the ternary value interval, d signifies a predetermined plurality of coefficients per sub-interval, and p signifies a predetermined plurality of bits; storing information concerning the sequence of the transmitted ternary values and providing storage signals during each sub-interval to indicate the last d ternary values, and respectively assigned d coefficients; forming a simulated signal from the coefficients of a sub-interval; comparing the values of the received signal occurring during the sub-intervals with the simultaneously occurring values of the simulated signal to provide a first or second binary comparison value indicating whether the concerned value of the received signal is less than or greater than the value of the simulated signal; and correcting the coefficients and reassigning the corrected coefficients to the ternary values of a ternary data signal while disregarding change of the coefficients in response to zero signal portions of the ternary values of the storage signals, by increasing the coefficients by a predetermined number in response to negative signal portions of the ternary values of the storage signals and in response to said first binary comparison value, increasing the coefficients by a predetermined number in response to positive signal portions of the ternary values of the storage signals and in response to said second binary comparison value, decreasing the coefficients by a predetermined number in response to negative signal portions of the ternary values of the storage signals and in response to said second binary comparison value, and decreasing the coefficients by a predetermined number in response to positive signal portions of the ternary values of the storage signals and in response to said first binary comparison value.
Claim 2
Independent Claim
353 words
A method for full duplex two-wire transmission of a ternary data signal whose ternary values are formed of positive signal portions, negative signal portions and zero signal portions, in which disruptions of a received signal at a station by the transmission signal of the station are prevented with the assistance of a simulated signal, comprising the steps of: assigning c·d coefficients each having p bits to each ternary value of the ternary data signal, where c signifies a predetermined plurality of sub-intervals of the ternary value interval, d signifies a predetermined plurality of coefficients per sub-interval, and p signifies a predetermined plurality of bits; storing information concerning the sequence of the transmitted ternary values and providing storage signals during each sub-interval to indicate the last d ternary values, and respectively assigned d coefficients; forming a simulated signal from the coefficients of a sub-interval; comparing the values of the received signal occurring during the sub-intervals with the simultaneously occurring values of the simulated signal to provide a first or second binary comparison value indicating whether the concerned value of the received signal is less than or greater than the value of the simulated signal; and correcting the coefficients and reassigning the corrected coefficients to the ternary values of a ternary data signal while disregarding change of the coefficients in response to zero signal portions of the ternary values of the storage signals, by increasing the coefficients by a predetermined number in response to negative signal portions of the ternary values of the storage signals and in response to said first binary comparison value, increasing the coefficients by a predetermined number in response to positive signal portions of the ternary values of the storage signals and in response to said second binary comparison value, decreasing the coefficients by a predetermined number in response to negative signal portions of the ternary values of the storage signals and in response to said second binary comparison value, and decreasing the coefficients by a predetermined number in response to positive signal portions of the ternary values of the storage signals and in response to said first binary comparison value.
Claim 3
Dependent Claim
41 words
The method of claim 1, wherein the step of forming the simulated signal is further defined as: summing all coefficients of a sub-interval which refer to positive signal portions and subtracting all coefficients of the sub-interval relating to negative signal portions.
Claim 4
Dependent Claim
46 words
The method of claim 1, wherein the step of forming the simulated signal is further defined as: subtracting all coefficients of a sub-interval which relate to positive signal portions of a storage signal and summing all coefficients of the sub-interval which relate to negative signal portions.
Claim 5
Dependent Claim
47 words
The method of claim 1, comprising the further step of: producing two binary signals from the ternary data signal, a first of said binary signals indicating the values of the ternary data signal and the second binary signal indicating the operational sign of the ternary data signal.
Claim 6
Dependent Claim
49 words
The method of claim 4, wherein the first and second binary signals each have d binary values, and comprising the step of: storing t times the d binary values of the first binary signal and the d binary values of the second binary signal during a ternary value interval.
Claim 7
Independent Claim
353 words
A method for full duplex two-wire transmission of a ternary data signal whose ternary values are formed of positive signal portions, negative signal portions and zero signal portions, in which disruptions of a received signal at a station by the transmission signal of the station are prevented with the assistance of a simulated signal, comprising the steps of: assigning c·d coefficients each having p bits to each ternary value of the ternary data signal, where c signifies a predetermined plurality of sub-intervals of the ternary value interval, d signifies a predetermined plurality of coefficients per sub-interval, and p signifies a predetermined plurality of bits; storing information concerning the sequence of the transmitted ternary values and providing storage signals during each sub-interval to indicate the last d ternary values, and respectively assigned d coefficients; forming a simulated signal from the coefficients of a sub-interval; comparing the values of the received signal occurring during the sub-intervals with the simultaneously occurring values of the simulated signal to provide a first or second binary comparison value indicating whether the concerned value of the received signal is less than or greater than the value of the simulated signal; and correcting the coefficients and reassigning the corrected coefficients to the ternary values of a ternary data signal while disregarding change of the coefficients in response to zero signal portions of the ternary values of the storage signals, by decreasing the coefficients by a predetermined number in response to negative signal portions of the ternary values of the storage signals and in response to said first binary comparison value, decreasing the coefficients by a predetermined number in response to positive signal portions of the ternary values of the storage signals and in response to said second binary comparison value, increasing the coefficients by a predetermined number in response to negative signal portions of the ternary values of the storage signals and in response to said second binary comparison value, and increasing the coefficients by a predetermined number in response to positive signal portions of the ternary values of the storage signals and in response to said first binary comparison value.
Claim 8
Independent Claim
353 words
A method for full duplex two-wire transmission of a ternary data signal whose ternary values are formed of positive signal portions, negative signal portions and zero signal portions, in which disruptions of a received signal at a station by the transmission signal of the station are prevented with the assistance of a simulated signal, comprising the steps of: assigning c·d coefficients each having p bits to each ternary value of the ternary data signal, where c signifies a predetermined plurality of sub-intervals of the ternary value interval, d signifies a predetermined plurality of coefficients per sub-interval, and p signifies a predetermined plurality of bits; storing information concerning the sequence of the transmitted ternary values and providing storage signals during each sub-interval to indicate the last d ternary values, and respectively assigned d coefficients; forming a simulated signal from the coefficients of a sub-interval; comparing the values of the received signal occurring during the sub-intervals with the simultaneously occurring values of the simulated signal to provide a first or second binary comparison value indicating whether the concerned value of the received signal is less than or greater than the value of the simulated signal; and correcting the coefficients and reassigning the corrected coefficients to the ternary values of a ternary data signal while disregarding change of the coefficients in response to zero signal portions of the ternary values of the storage signals, by decreasing the coefficients by a predetermined number in response to negative signal portions of the ternary values of the storage signals and in response to said first binary comparison value, decreasing the coefficients by a predetermined number in response to positive signal portions of the ternary values of the storage signals and in response to said second binary comparison value, increasing the coefficients by a predetermined number in response to negative signal portions of the ternary values of the storage signals and in response to said second binary comparison value, and increasing the coefficients by a predetermined number in response to positive signal portions of the ternary values of the storage signals and in response to said first binary comparison value.
Claim 9
Dependent Claim
224 words
In a full duplex two-wire transmission system which has a transmitting-receiving station connected to a two-wire line, and which includes a data source connected to a transmitter, and a receiver, and in which the data source provides ternary data signals whose ternary values are formed of positive signal portions, negative signal portions and zero signal portions, and in which a signal simulator is connected to the data source to provide a simulated signal by assigning c·d coefficients, each having p bits, to each ternary value of a ternary data signal, where c signifies a predetermined plurality of sub-intervals of the ternary value interval, d signifies a predetermined plurality of coefficients per sub-interval, and p signifies a predetermined plurality of bits, and in which information concerning the sequence of the transmitted ternary values are stored and storage signals indicating the last d ternary values and assigned to respectively d coefficients are emitted during each sub-interval, and in which the simulated signal is obtained by algebraic addition of al coefficients of a sub-interval relating to positive signal portions and by algebraic addition of all coefficients of the sub-interval which relate to negative signal portions, the improvement therein comprising: a data memory connected to the data source and including first shift registers for storing the ternary values; and a coefficient memory for receiving and storing the coefficients.
Claim 10
Dependent Claim
224 words
In a full duplex two-wire transmission system which has a transmitting-receiving station connected to a two-wire line, and which includes a data source connected to a transmitter, and a receiver, and in which the data source provides ternary data signals whose ternary values are formed of positive signal portions, negative signal portions and zero signal portions, and in which a signal simulator is connected to the data source to provide a simulated signal by assigning c·d coefficients, each having p bits, to each ternary value of a ternary data signal, where c signifies a predetermined plurality of sub-intervals of the ternary value interval, d signifies a predetermined plurality of coefficients per sub-interval, and p signifies a predetermined plurality of bits, and in which information concerning the sequence of the transmitted ternary values are stored and storage signals indicating the last d ternary values and assigned to respectively d coefficients are emitted during each sub-interval, and in which the simulated signal is obtained by algebraic addition of al coefficients of a sub-interval relating to positive signal portions and by algebraic addition of all coefficients of the sub-interval which relate to negative signal portions, the improvement therein comprising: a data memory connected to the data source and including first shift registers for storing the ternary values; and a coefficient memory for receiving and storing the coefficients.
References Cited (Backward Citations)
US4087642A
Cited
US4097859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |