US5943372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthogonal polarization and time varying offsetting of signals for digital data transmission or reception
Assignee: Nokia of America Corp
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Filing: 1997-06-23
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Granted: 1999-08-24
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Expires: 2017-06-23
Abstract
Abstract A system for inducing rapid fading in wireless communication systems, such as digital radio and television transmission is described. Orthogonal polarization combined with time varying offsets are combined to insure rapid fading and result in improved signal reception.
Inventors
- 👤 Michael J. Gans
- 👤 Vijitha Weerackody
- 👤 Jack Harriman Winters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:35
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
176 words
An apparatus for receiving data comprising a first receiving antenna having an input and an output, a second receiving antenna having an input and an output, said first and second receiving antennas arranged to receive signals at their inputs which are substantially orthogonally polarized with respect to one another, a first channel having an input and an output, said input connected to the output of the first receiving antenna, a second channel having an input and an output, said input connected to the output of the second receiving antenna, said second channel comprising an offset device for applying a time varying offset to a signal at the second channel's input to create a signal with a time varying offset at the second channel's output, said time varying offset being substantially independent of the signal at the second channel's input, a signal combiner having an output, and first and second inputs connected to the outputs of the first and second channels respectively, and signal processing means having an input connected to the output of the signal combiner.
Claim 2
Independent Claim
176 words
An apparatus for receiving data comprising a first receiving antenna having an input and an output, a second receiving antenna having an input and an output, said first and second receiving antennas arranged to receive signals at their inputs which are substantially orthogonally polarized with respect to one another, a first channel having an input and an output, said input connected to the output of the first receiving antenna, a second channel having an input and an output, said input connected to the output of the second receiving antenna, said second channel comprising an offset device for applying a time varying offset to a signal at the second channel's input to create a signal with a time varying offset at the second channel's output, said time varying offset being substantially independent of the signal at the second channel's input, a signal combiner having an output, and first and second inputs connected to the outputs of the first and second channels respectively, and signal processing means having an input connected to the output of the signal combiner.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1 wherein the first receiving antenna is configured to receive a vertically polarized signal and the second receiving antenna is configured to receive a horizontally polarized signal.
Claim 4
Dependent Claim
35 words
The apparatus of claim 1 wherein the first receiving antenna is configured to receive a left hand circularly polarized signal and the second receiving antenna is configured to receive a right hand circularly polarized signal.
Claim 5
Dependent Claim
17 words
The apparatus of claim 1 wherein the signal processing means further comprises a decoder and a deinterleaver.
Claim 6
Independent Claim
163 words
An apparatus for receiving data comprising a first receiving antenna having an input and an output, a second receiving antenna having an input and an output, said first and second receiving antennas arranged to receive signals at their inputs which are substantially orthogonally polarized with respect to one another, a first channel having an input and an output, said input connected to the output of the first receiving antenna, a second channel having an input and an output, said input connected to the output of the second receiving antenna, said second channel comprising an offset device for applying a periodic time varying offset to a signal at the second channel's input to create a signal with a periodic time varying offset at the second channel's output, a signal combiner having an output, and first and second inputs connected to the outputs of the first and second channels respectively, and signal processing means having an input connected to the output of the signal combiner.
Claim 7
Independent Claim
163 words
An apparatus for receiving data comprising a first receiving antenna having an input and an output, a second receiving antenna having an input and an output, said first and second receiving antennas arranged to receive signals at their inputs which are substantially orthogonally polarized with respect to one another, a first channel having an input and an output, said input connected to the output of the first receiving antenna, a second channel having an input and an output, said input connected to the output of the second receiving antenna, said second channel comprising an offset device for applying a periodic time varying offset to a signal at the second channel's input to create a signal with a periodic time varying offset at the second channel's output, a signal combiner having an output, and first and second inputs connected to the outputs of the first and second channels respectively, and signal processing means having an input connected to the output of the signal combiner.
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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) | 2002-08-23 | 2003-02-22 | 2003-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-23 | 2007-02-22 | 2007-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-23 | 2011-02-22 | 2011-08-24 | $7700.00 | Window Closed / Lapsed |