US4586186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Maintenance response signalling arrangement for a digital transmission system
Assignee: SubCom LLC
•
Filing: 1983-08-08
•
Granted: 1986-04-29
•
Expires: 2003-08-08
Abstract
Abstract A maintenance response signalling arrangement for a digital transmission system transmits response signals from a repeater to an end terminal. From the repeater, response information is modulated onto a subcarrier which is superimposed as a jitter signal on the main data stream. At the end terminal, the response information is recovered from the jitter signal on the main data stream.
Inventors
- 👤 Cleo D. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:03
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/07; H04B10/075; H04B10/077; H04B10/0775; H04B10/0771; H04B10/0777; H04B17/00; H04B17/40; H04B17/401; H04B17/406; H04J; H04J3/00; H04J3/02; H04J3/12; H04B2210/00; H04B2210/07; H04B2210/074
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
164 words
A maintenance response signalling arrangement for a digital transmission system using a main data stream between a repeater and an end terminal, the arrangement comprising means at the repeater responsive to a signal received from the end terminal for producing a subcarrier; means for modulating the subcarrier information from the repeater; means responsive to the modulated subcarrier for varying delay of the main data stream between the repeater and the end terminal to produce a jitter signal representing the information on the main data stream; means responsive to the jitter signal for recovering the information, the recovering means include means responsive to the main data stream for recovering a clock signal including the jitter signal representing the information; means responsive to the recovered clock signal for reproducing the modulated subcarrier; means responsive to the recovered clock signal for producing quadrature clock signals at the frequency of the subcarrier; and means responsive to the modulated subcarrier and the quadrature clock signals for recovering the information.
Claim 2
Dependent Claim
164 words
A maintenance response signalling arrangement for a digital transmission system using a main data stream between a repeater and an end terminal, the arrangement comprising means at the repeater responsive to a signal received from the end terminal for producing a subcarrier; means for modulating the subcarrier information from the repeater; means responsive to the modulated subcarrier for varying delay of the main data stream between the repeater and the end terminal to produce a jitter signal representing the information on the main data stream; means responsive to the jitter signal for recovering the information, the recovering means include means responsive to the main data stream for recovering a clock signal including the jitter signal representing the information; means responsive to the recovered clock signal for reproducing the modulated subcarrier; means responsive to the recovered clock signal for producing quadrature clock signals at the frequency of the subcarrier; and means responsive to the modulated subcarrier and the quadrature clock signals for recovering the information.
Claim 3
Dependent Claim
100 words
A maintenance response signal receiver for a digital transmission system terminal, the receiver comprising means for receiving a main data stream including a jitter signal representing response information modulated on a subcarrier; means responsive to the main data stream for recovering a clock signal including the jitter signal representing the response information, means responsive to the recovered clock signal for reproducing the modulated subcarrier, means responsive to the recovered clock signal for producing quadrature clock signals at the frequency of the subcarrier, and means responsive to the reproduced modulated subcarrier and the quadrature clock signals for recovering the response information.
Claim 4
Dependent Claim
100 words
A maintenance response signal receiver for a digital transmission system terminal, the receiver comprising means for receiving a main data stream including a jitter signal representing response information modulated on a subcarrier; means responsive to the main data stream for recovering a clock signal including the jitter signal representing the response information, means responsive to the recovered clock signal for reproducing the modulated subcarrier, means responsive to the recovered clock signal for producing quadrature clock signals at the frequency of the subcarrier, and means responsive to the reproduced modulated subcarrier and the quadrature clock signals for recovering the response information.
Claim 5
Dependent Claim
140 words
A receiver comprising means for receiving a carrier modulated with information, means responsive to the carrier for producing quadrature clock signals cos (ω c t+φ) and sin (ω c t+φ) at the frequency of the carrier, means responsive to the clock signal cos (ω c t+φ) and to the modulated carrier S(t) cos (ω c t) for producing a first product component waveform S(t)/2 cos (φ), wherein S(t) is a time varying amplitude function, ω c is an angular velocity, t is time, and φ is a phase angle, means responsive to the clock signal sin (ω c t+φ) and to the modulated carrier S(t) cos (ω c t) for producing a second product component waveform S(t)/2 sin (φ), and means responsive to the first and second product component waveforms for producing an amplitude modulated signal waveform (S(t)/2) 2 .
Claim 6
Dependent Claim
140 words
A receiver comprising means for receiving a carrier modulated with information, means responsive to the carrier for producing quadrature clock signals cos (ω c t+φ) and sin (ω c t+φ) at the frequency of the carrier, means responsive to the clock signal cos (ω c t+φ) and to the modulated carrier S(t) cos (ω c t) for producing a first product component waveform S(t)/2 cos (φ), wherein S(t) is a time varying amplitude function, ω c is an angular velocity, t is time, and φ is a phase angle, means responsive to the clock signal sin (ω c t+φ) and to the modulated carrier S(t) cos (ω c t) for producing a second product component waveform S(t)/2 sin (φ), and means responsive to the first and second product component waveforms for producing an amplitude modulated signal waveform (S(t)/2) 2 .
References Cited (Backward Citations)
US3718766A
Cited
US4015083A
Cited
US4121195A
Cited
US4079203A
Cited
US4300239A
Cited
US4313224A
Cited
US4369523A
Cited
US4499600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |