Patent US5095497A successfully refreshed from Google Patents.
US5095497A
Expired / Lapsed
US
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Technique for achieving the full coding gain of encoded digital signals
Assignee: Nokia Bell Labs
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Filing: 1989-11-20
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Granted: 1992-03-10
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Expires: 2009-11-20
Abstract
Abstract In a telephone local loop transmission arrangement, data is communicated from the customer premises to the central office utilizing a multi-dimensional, passband signal illustratively at 480 kb/s. Specifically, the transmitted signal is encoded in a trellis code and precoded using a generalized partial response filter. The received signal is processed by a circuitry that implements a trellis decoding in combination with nonlinear filtering.
Inventors
- 👤 Ahmad K. Aman
- 👤 Robert L. Cupo
- 👤 Nicholas A. Zervos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:17
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/497; H04L25/4975; H04L25/02; H04L25/03; H04L25/03006; H04L25/03343; H04L27/00; H04L27/32; H04L27/34; H04L27/3405; H04L27/3416; H04L27/3427; H04L27/3438; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0435; H04Q11/0471; H04Q2213/00; H04Q2213/033
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
Apparatus for transmitting a data signal which represents information, said data signal being corrupted by noise which is substantially colored after propagating through a communications medium, said apparatus comprising means for encoding said information using a code, the utilized code providing the encoded information having improved immunity to white noise relative to the uncoded information, and means for nonlinearly processing said encoded information in such a manner that distortion associated with subsequent whitening of said noise in receiver apparatus is reduced.
Claim 2
Dependent Claim
81 words
Apparatus for transmitting a data signal which represents information, said data signal being corrupted by noise which is substantially colored after propagating through a communications medium, said apparatus comprising means for encoding said information using a code, the utilized code providing the encoded information having improved immunity to white noise relative to the uncoded information, and means for nonlinearly processing said encoded information in such a manner that distortion associated with subsequent whitening of said noise in receiver apparatus is reduced.
Claim 3
Dependent Claim
12 words
The apparatus of claim 1 wherein said code is a trellis code.
Claim 4
Dependent Claim
14 words
The apparatus of claim 1 wherein said processing means employs generalized partial response signaling.
Claim 5
Dependent Claim
30 words
The apparatus of claim 3 wherein a parameter L is associated with said processing means, the value of said parameter L being at least a generalized partial response signaling bound.
Claim 6
Independent Claim
81 words
A method for transmitting a data signal which represents information, said data signal being corrupted by noise which is substantially colored after propagating through a communications medium, said method comprising the steps of encoding said information using a code, the utilized code providing the encoded information having improved immunity to white noise relative to the uncoded information, and nonlinearly processing said encoded information in such a manner that distortion associated with subsequent whitening of said noise in receiver apparatus is reduced.
Claim 7
Independent Claim
81 words
A method for transmitting a data signal which represents information, said data signal being corrupted by noise which is substantially colored after propagating through a communications medium, said method comprising the steps of encoding said information using a code, the utilized code providing the encoded information having improved immunity to white noise relative to the uncoded information, and nonlinearly processing said encoded information in such a manner that distortion associated with subsequent whitening of said noise in receiver apparatus is reduced.
Claim 8
Dependent Claim
12 words
The method of claim 5 wherein said code is a trellis code.
Claim 9
Dependent Claim
14 words
The method of claim 5 wherein said processing step employs generalized partial response signaling.
Claim 10
Dependent Claim
30 words
The method of claim 7 wherein a parameter L is associated with said processing step, the value of said parameter L being at least a generalized partial response signaling bound.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |