Patent US5001556A successfully refreshed from Google Patents.
US3596002A
Expired / Lapsed
US
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System for transmitting binary-coded data
Assignee: Telefunken Patentverwertungs GmbH
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Filing: 1969-10-24
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Granted: 1971-07-27
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Expires: 1989-10-24
Abstract
Abstract A satellite link binary data transmission system including a plurality of ground stations capable of operating simultaneously, each station transmitting a cyclically repeated address code word and polarity modulating each such word according to the value of one data bit to be transmitted, the satellite being arranged to combine all transmitted signals into a composite signal and each station being arranged to receive the composite signal and to extract therefrom the data directed to it by correlating the composite signal with its own address word.
Inventors
- 👤 Horst Ohnsorge
- 👤 Wolf Herold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:31
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/204; H04B7/216; H04L; H04L5/00; H04L5/02; H04L5/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
A method for transmitting binary-coded data between ground stations via a communications satellite comprising the steps of: a. causing all ground stations to operate simultaneously, each station transmitting or receiving at any given time; b. sending from each transmitting station a cyclically repeated address word while modulating the polarity during each word cycle in accordance with a single respective data bit to be transmitted; c. sending such sequences from all transmitting stations so that they arrive at the satellite with a fixed phase relationship to one another; d. combining all received sequences at the satellite into a composite signal; e. transmitting the composite signal from the satellite to all ground stations; and f. correlating the received composite signal at each ground station with the address word of that station for selecting the data intended for that station.
Claim 2
Independent Claim
137 words
A method for transmitting binary-coded data between ground stations via a communications satellite comprising the steps of: a. causing all ground stations to operate simultaneously, each station transmitting or receiving at any given time; b. sending from each transmitting station a cyclically repeated address word while modulating the polarity during each word cycle in accordance with a single respective data bit to be transmitted; c. sending such sequences from all transmitting stations so that they arrive at the satellite with a fixed phase relationship to one another; d. combining all received sequences at the satellite into a composite signal; e. transmitting the composite signal from the satellite to all ground stations; and f. correlating the received composite signal at each ground station with the address word of that station for selecting the data intended for that station.
Claim 3
Independent Claim
157 words
A system for transmitting binary-coded data between ground stations via a communications satellite, comprising in combination control means for: a. causing all ground stations to operate simultaneously, each station transmitting or receiving at any given time; b. transmission control means at each station for sending from each transmitting station a cyclically repeated address word while modulating the polarity during each word cycle in accordance with a single respective data bit to be transmitted; c. synchronization means for causing such sequences from all transmitting stations to arrive at the satellite with a fixed phase relationship to one another; d. means at the satellite for combining all received sequences into a composite signal; e. retransmission means for transmitting the composite signal from the satellite to all ground stations; and f. correlator means at each station for correlating the received composite signal at the station with the address word of that station for selecting the data intended for that station.
Claim 4
Independent Claim
157 words
A system for transmitting binary-coded data between ground stations via a communications satellite, comprising in combination control means for: a. causing all ground stations to operate simultaneously, each station transmitting or receiving at any given time; b. transmission control means at each station for sending from each transmitting station a cyclically repeated address word while modulating the polarity during each word cycle in accordance with a single respective data bit to be transmitted; c. synchronization means for causing such sequences from all transmitting stations to arrive at the satellite with a fixed phase relationship to one another; d. means at the satellite for combining all received sequences into a composite signal; e. retransmission means for transmitting the composite signal from the satellite to all ground stations; and f. correlator means at each station for correlating the received composite signal at the station with the address word of that station for selecting the data intended for that station.
Claim 5
Dependent Claim
29 words
An arrangement as defined in claim 2 wherein the address word for each station is an orthogonal time function with respect to the address word for every other station.
Claim 6
Dependent Claim
46 words
An arrangement as defined in claim 3 wherein the address word time functions selected are such that the ratio of the autocorrelation function to the cross correlation function for each word varies only slightly when there occur deviations from the fixed time relationship between address words.
Claim 7
Dependent Claim
18 words
An arrangement as defined in claim 2 wherein there is provided at least one continuously transmitting ground station.
Claim 8
Dependent Claim
27 words
An arrangement as defined in claim 5 wherein the other ground stations derive a reference clock pulse from the signal transmitted by the continuously transmitting ground station.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |