US3665395A
Expired / Lapsed
US
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Method of data transmission
Assignee: Siemens AG
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Filing: 1968-06-25
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Granted: 1972-05-23
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Expires: 1988-06-25
Abstract
Abstract A method of transmitting data over connection paths subject to signal distorting influences wherein the transmitted message signals comprise parity bits interspersed according to a predetermined ratio with the individual information bits comprising the message signal. The message signals are transmitted in the form of two time spaced transmission signals of the above described type in different frequency channels.
Inventors
- 👤 Karlheinz Bochmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:44
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/22; H04L1/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
217 words
A method for communicating data signals comprising information bits and parity bits over data transmission systems having transmitting and receiving ends where said data signals are subject to distortion therebetween, comprising the steps of: encoding said data signals by interspersing said parity bits within said information bits comprising the data signal according to a predetermined ratio and sequence and forming therefrom first and second similarly encoded trains of signals, displacing said first train of signals in time relative to said second train of signals, transmitting said first train of signals over a first frequency channel, transmitting said second train of signals over a second frequency channel, displacing said second train of signals in time such that the corresponding individual bits constituting said first and second trains of signals, respectively, are in timed coincidence, applying in coincidence the corresponding bits of said first and second trains of signals to a decoder at the receiving end of said system to derive first and second trains of decoded signals, evaluating said first and second trains of signals to determine from said coding which of said first and second trains is least distorted, applying to the output of said system that train of signals which is least distorted, and reconstructing, thereafter, any distorted bits in said least distorted train of signals.
Claim 2
Independent Claim
217 words
A method for communicating data signals comprising information bits and parity bits over data transmission systems having transmitting and receiving ends where said data signals are subject to distortion therebetween, comprising the steps of: encoding said data signals by interspersing said parity bits within said information bits comprising the data signal according to a predetermined ratio and sequence and forming therefrom first and second similarly encoded trains of signals, displacing said first train of signals in time relative to said second train of signals, transmitting said first train of signals over a first frequency channel, transmitting said second train of signals over a second frequency channel, displacing said second train of signals in time such that the corresponding individual bits constituting said first and second trains of signals, respectively, are in timed coincidence, applying in coincidence the corresponding bits of said first and second trains of signals to a decoder at the receiving end of said system to derive first and second trains of decoded signals, evaluating said first and second trains of signals to determine from said coding which of said first and second trains is least distorted, applying to the output of said system that train of signals which is least distorted, and reconstructing, thereafter, any distorted bits in said least distorted train of signals.
Claim 3
Dependent Claim
37 words
The method according to claim 1 wherein said time displacements of said first and second trains of signals are accomplished by applying said first and second trains, respectively, to first and second shift registers having like characteristics.
Claim 4
Dependent Claim
34 words
The method according to claim 1 wherein said time displacements of said first and second trains of signals are accomplished by applying said signals, respectivelY, to first and second delay lines having like characteristics.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |