US4612653A
Expired / Lapsed
US
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Delay modulation phase coding
Assignee: Raytheon Co
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Filing: 1983-01-21
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Granted: 1986-09-16
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Expires: 2003-01-21
Abstract
Abstract The use of delay modulation (or "Miller") phase coding to encode transmitted data is disclosed in a multinodal, peer network communication system. The use of delay modulation provides bandwidth compression and reduces the direct current (dc) voltage component of transmitted data. In addition, the delay modulation provides a unipolar communication in which the transmitted waveform contains both data and synchronization information and error detection capabilities.
Inventors
- 👤 William D. Livingston
- 👤 Wayne A. Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:00
CPC Classifications
H; H03; H03M; H03M5/00; H03M5/02; H03M5/04; H03M5/14; H04; H04L; H04L12/00; H04L12/28; H04L12/40; H04L12/407; H04L12/413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
Apparatus for encoding digital data transmitted among at least three communicating devices wherein said communicating devices share a plurality of transmission media, comprising: (a) synchronizing means to add a synchronization signal to the beginning of said digital data thereby to provide a modified digital data signal; (b) first latching means responsive to said modified digital data for providing a binary signal for a predetermined duration in accordance with the level of said modified digital data at the beginning of each said predetermined duration; (c) second latching means responsive to said binary signal for providing a delayed modulated signal for a duration of one-half said predetermined duration in accordance with the level of said binary signal at the beginning of each one-half predetermined duration interval; and (d) dividing means responsive to said delayed modulated signal for expanding the duration of each said delayed modulated signal to said predetermined duration to thereby encode the digital data.
Claim 2
Dependent Claim
154 words
Apparatus for encoding digital data transmitted among at least three communicating devices wherein said communicating devices share a plurality of transmission media, comprising: (a) synchronizing means to add a synchronization signal to the beginning of said digital data thereby to provide a modified digital data signal; (b) first latching means responsive to said modified digital data for providing a binary signal for a predetermined duration in accordance with the level of said modified digital data at the beginning of each said predetermined duration; (c) second latching means responsive to said binary signal for providing a delayed modulated signal for a duration of one-half said predetermined duration in accordance with the level of said binary signal at the beginning of each one-half predetermined duration interval; and (d) dividing means responsive to said delayed modulated signal for expanding the duration of each said delayed modulated signal to said predetermined duration to thereby encode the digital data.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |