Patent US3603458A successfully refreshed from Google Patents.
Patent US5909435A successfully refreshed from Google Patents.
US5909435A
Expired / Lapsed
US
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Wideband code-division multiple access system and method
Assignee: TransSKY Corp
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Filing: 1998-02-12
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Granted: 1999-06-01
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Expires: 2018-02-12
Abstract
Abstract A wideband code division multiple access, spread-spectrum communications system, having an equalization channel. The transmitter transmits data over a spread-spectrum channel, along with a spread-spectrum channel having little or no information, i.e., an equalization channel. The receiver uses in-phase early, punctual and late signals, and quadrature-phase early, punctual and late signals, for equalizing of the data spread-spectrum channel, and for generating an output in-phase data signal and an output quadrature-phase data signal.
Inventors
- 👤 Tuvia Apelewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:24
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04L; H04L27/00; H04L27/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
327 words
An improvement to a wideband code-division-multiple-access (W-CDMA) system, comprising: a W-CDMA transmitter, said W-CDMA transmitter including, an in-phase-data-product device for multiplying an in-phase-data (IDATA) signal with a data-chip-sequence signal, thereby generating an IDATA-spread-spectrum signal; a quadrature-phase-data-product device for multiplying a quadrature-phase-data (QDATA) signal with the data-chip-sequence signal, thereby generating a QDATA-spread-spectrum signal; equalization-chip means for outputting an equalization-chip-sequence signal; an in-phase combiner, coupled to said in-phase-data-product device and to said equalization-chip means, for linearly combining the IDATA-spread-spectrum signal and the equalization-chip-sequence signal, to generate an in-phase-combined-spread-spectrum signal; a quadrature-phase combiner, coupled to said quadrature-phase-data-product device and to said equalization-chip means, for linearly combining the QDATA-spread-spectrum signal, and the equalization-chip-sequence signal, to generate the quadrature-phase-combined-spread-spectrum signal; a quadrature-phase-shift-keyed (QPSK) modulator, coupled to said in-phase combiner and to said quadrature-phase combiner, for QPSK modulating the in-phase-combined-spread-spectrum signal with the quadrature-phase-combined-spread-spectrum signal, thereby generating a QPSK-spread-spectrum signal; a power amplifier, coupled to said QPSK modulator, for amplifying the QPSK-spread-spectrum signal; a transmitter antenna, coupled to said power amplifier, for radiating the amplified QPSK-spread-spectrum signal over a communications channel; a W-CDMA receiver, said W-CDMA receiver including, a receiver antenna for coupling the W-CDMA receiver to the communications channel; in-phase-equalization means for despreading, at a first chip time and at a second chip time, an in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; quadrature-phase-equalization means for despreading, at the first chip time and at the second chip time, a quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; in-phase-data means for despreading, at the first chip time and at the second chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; quadrature-phase-data means for despreading, at the first chip time and at the second chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; and a processor, coupled to said in-phase-equalization means, said quadrature-phase-equalization means, said in-phase-data means, and said quadrature-phase-data means, for determining, from the despread signals, an output-in-phase-data signal and an output-quadrature-phase-data signal.
Claim 2
Dependent Claim
327 words
An improvement to a wideband code-division-multiple-access (W-CDMA) system, comprising: a W-CDMA transmitter, said W-CDMA transmitter including, an in-phase-data-product device for multiplying an in-phase-data (IDATA) signal with a data-chip-sequence signal, thereby generating an IDATA-spread-spectrum signal; a quadrature-phase-data-product device for multiplying a quadrature-phase-data (QDATA) signal with the data-chip-sequence signal, thereby generating a QDATA-spread-spectrum signal; equalization-chip means for outputting an equalization-chip-sequence signal; an in-phase combiner, coupled to said in-phase-data-product device and to said equalization-chip means, for linearly combining the IDATA-spread-spectrum signal and the equalization-chip-sequence signal, to generate an in-phase-combined-spread-spectrum signal; a quadrature-phase combiner, coupled to said quadrature-phase-data-product device and to said equalization-chip means, for linearly combining the QDATA-spread-spectrum signal, and the equalization-chip-sequence signal, to generate the quadrature-phase-combined-spread-spectrum signal; a quadrature-phase-shift-keyed (QPSK) modulator, coupled to said in-phase combiner and to said quadrature-phase combiner, for QPSK modulating the in-phase-combined-spread-spectrum signal with the quadrature-phase-combined-spread-spectrum signal, thereby generating a QPSK-spread-spectrum signal; a power amplifier, coupled to said QPSK modulator, for amplifying the QPSK-spread-spectrum signal; a transmitter antenna, coupled to said power amplifier, for radiating the amplified QPSK-spread-spectrum signal over a communications channel; a W-CDMA receiver, said W-CDMA receiver including, a receiver antenna for coupling the W-CDMA receiver to the communications channel; in-phase-equalization means for despreading, at a first chip time and at a second chip time, an in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; quadrature-phase-equalization means for despreading, at the first chip time and at the second chip time, a quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; in-phase-data means for despreading, at the first chip time and at the second chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; quadrature-phase-data means for despreading, at the first chip time and at the second chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; and a processor, coupled to said in-phase-equalization means, said quadrature-phase-equalization means, said in-phase-data means, and said quadrature-phase-data means, for determining, from the despread signals, an output-in-phase-data signal and an output-quadrature-phase-data signal.
Claim 3
Independent Claim
281 words
A method using a wideband code-division-multiple-access (W-CDMA) transmitter and a W-CDMA receiver, comprising the steps of: multiplying, at said W-CDMA transmitter, an in-phase-data (IDATA) signal with a data-chip-sequence signal, thereby generating an IDATA-spread-spectrum signal; multiplying, at said W-CDMA transmitter, a quadrature-phase-data (QDATA) signal with the data-chip-sequence signal, thereby generating a QDATA-spread-spectrum signal; generating, at said W-CDMA transmitter, an equalization-chip-sequence signal; combining, linearly, at said W-CDMA transmitter, the IDATA-spread-spectrum signal and the equalization-chip-sequence signal, to generate an in-phase-combined-spread-spectrum signal; combining, linearly, at said W-CDMA transmitter, the QDATA-spread-spectrum signal, and the equalization-chip-sequence signal, to generate the quadrature-phase-combined-spread-spectrum signal; QPSK modulating, at said W-CDMA transmitter, the in-phase-combined-spread-spectrum signal with the quadrature-phase-combined-spread-spectrum signal, thereby generating a QPSK-spread-spectrum signal; radiating, at said W-CDMA transmitter, the QPSK-spread-spectrum signal over a communications channel; despreading, at a first chip time, an in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading at a second chip time, the second chip time different from the first chip time, the in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, a quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; and generating, from the despread signals, an output-in-phase-data signal and an output-quadrature-phase-data signal.
Claim 4
Independent Claim
281 words
A method using a wideband code-division-multiple-access (W-CDMA) transmitter and a W-CDMA receiver, comprising the steps of: multiplying, at said W-CDMA transmitter, an in-phase-data (IDATA) signal with a data-chip-sequence signal, thereby generating an IDATA-spread-spectrum signal; multiplying, at said W-CDMA transmitter, a quadrature-phase-data (QDATA) signal with the data-chip-sequence signal, thereby generating a QDATA-spread-spectrum signal; generating, at said W-CDMA transmitter, an equalization-chip-sequence signal; combining, linearly, at said W-CDMA transmitter, the IDATA-spread-spectrum signal and the equalization-chip-sequence signal, to generate an in-phase-combined-spread-spectrum signal; combining, linearly, at said W-CDMA transmitter, the QDATA-spread-spectrum signal, and the equalization-chip-sequence signal, to generate the quadrature-phase-combined-spread-spectrum signal; QPSK modulating, at said W-CDMA transmitter, the in-phase-combined-spread-spectrum signal with the quadrature-phase-combined-spread-spectrum signal, thereby generating a QPSK-spread-spectrum signal; radiating, at said W-CDMA transmitter, the QPSK-spread-spectrum signal over a communications channel; despreading, at a first chip time, an in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading at a second chip time, the second chip time different from the first chip time, the in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, a quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; and generating, from the despread signals, an output-in-phase-data signal and an output-quadrature-phase-data signal.
Claim 5
Dependent Claim
109 words
The W-CDMA method as set forth in claim 2, further comprising the steps of: despreading, at a third chip time, the third chip time different from the first chip time and from the second chip time, the in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the third chip time, the quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the third chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the third chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; and generating, from the despread signals, the output-in-phase-data signal and the output-quadrature-phase-data signal.
Claim 6
Dependent Claim
196 words
An improvement to a wideband code-division-multiple-access (W-CDMA) receiver for receiving a QPSK-spread-spectrum signal comprising an in-phase-combined-spread-spectrum signal and a quadrature-phase-combined-spread-spectrum signal, with the in-phase-combined-spread-spectrum signal including an equalization-chip-sequence signal combined with an in-phase-data signal spread-spectrum processed with a data-chip-sequence signal, and with the quadrature-phase-combined-spread-spectrum signal including an equalization-chip-sequence signal combined with a quadrature-phase-data signal spread-spectrum processed with the data-chip-sequence signal, the improvement comprising: in-phase-equalization means for despreading, at a first chip time and at a second chip time, an in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; quadrature-phase-equalization means for despreading, at the first chip time and at the second chip time, a quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; in-phase-data means for despreading, at the first chip time and at the second chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; quadrature-phase-data means for despreading, at the first chip time and at the second chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; and a processor, coupled to said in-phase-equalization means, said quadrature-phase-equalization means, said in-phase-data means, and said quadrature-phase-data means, for determining, from the despread signals, an output-in-phase-data signal and an output-quadrature-phase-data signal.
Claim 7
Dependent Claim
196 words
An improvement to a wideband code-division-multiple-access (W-CDMA) receiver for receiving a QPSK-spread-spectrum signal comprising an in-phase-combined-spread-spectrum signal and a quadrature-phase-combined-spread-spectrum signal, with the in-phase-combined-spread-spectrum signal including an equalization-chip-sequence signal combined with an in-phase-data signal spread-spectrum processed with a data-chip-sequence signal, and with the quadrature-phase-combined-spread-spectrum signal including an equalization-chip-sequence signal combined with a quadrature-phase-data signal spread-spectrum processed with the data-chip-sequence signal, the improvement comprising: in-phase-equalization means for despreading, at a first chip time and at a second chip time, an in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; quadrature-phase-equalization means for despreading, at the first chip time and at the second chip time, a quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; in-phase-data means for despreading, at the first chip time and at the second chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; quadrature-phase-data means for despreading, at the first chip time and at the second chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; and a processor, coupled to said in-phase-equalization means, said quadrature-phase-equalization means, said in-phase-data means, and said quadrature-phase-data means, for determining, from the despread signals, an output-in-phase-data signal and an output-quadrature-phase-data signal.
Claim 8
Dependent Claim
150 words
The improvement to the W-CDMA receiver as set forth in claim 4, wherein said in-phase-equalization means for despreading the in-phase component of the equalization-chip-sequence signal at the first chip time, at the second chip time, and at a third chip time, the first chip time different from the second chip time and from the third chip time, and the second chip time different from the third chip time; said quadrature-phase-equalization means for despreading the quadrature-phase component of the equalization-chip-sequence signal at the first chip time and at the second chip time and at the third chip time; said in-phase-data means for despreading the IDATA spread-spectrum signal at the first chip time and at the second chip time and at the third chip time; and said quadrature-phase-data means for despreading the QDATA spread-spectrum signal at the first chip time and at the second chip time and at the third chip time.
Claim 9
Independent Claim
220 words
A method for improving a wideband code-division-multiple-access (W-CDMA) receiver for receiving a QPSK-spread-spectrum signal comprising an in-phase-combined-spread-spectrum signal and a quadrature-phase-combined-spread-spectrum signal, with the in-phase-combined-spread-spectrum signal including an equalization-chip-sequence signal combined with an in-phase-data signal spread-spectrum processed with a data-chip-sequence signal, and with the quadrature-phase-combined-spread-spectrum signal including an equalization-chip-sequence signal combined with a quadrature-phase-data signal spread-spectrum processed with the data-chip-sequence signal, comprising the steps of: despreading, at a first chip time, an in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at a second chip time, the second chip time different from the first chip time, the in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, a quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; and generating, from the despread signals, an output-in-phase-data signal and an output-quadrature-phase-data signal.
Claim 10
Independent Claim
220 words
A method for improving a wideband code-division-multiple-access (W-CDMA) receiver for receiving a QPSK-spread-spectrum signal comprising an in-phase-combined-spread-spectrum signal and a quadrature-phase-combined-spread-spectrum signal, with the in-phase-combined-spread-spectrum signal including an equalization-chip-sequence signal combined with an in-phase-data signal spread-spectrum processed with a data-chip-sequence signal, and with the quadrature-phase-combined-spread-spectrum signal including an equalization-chip-sequence signal combined with a quadrature-phase-data signal spread-spectrum processed with the data-chip-sequence signal, comprising the steps of: despreading, at a first chip time, an in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at a second chip time, the second chip time different from the first chip time, the in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, a quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the first chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the second chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; and generating, from the despread signals, an output-in-phase-data signal and an output-quadrature-phase-data signal.
Claim 11
Dependent Claim
109 words
The W-CDMA method as set forth in claim 6, further comprising the steps of: despreading, at a third chip time, the third chip time different from the first chip time and from the second chip time, the in-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the third chip time, the quadrature-phase component of the equalization-chip-sequence signal embedded in the QPSK-spread-spectrum signal; despreading, at the third chip time, the IDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; despreading, at the third chip time, the QDATA spread-spectrum signal embedded in the QPSK-spread-spectrum signal; and generating, from the despread signals, the output-in-phase-data signal and the output-quadrature-phase-data signal.
Claim 12
Dependent Claim
23 words
The W-CDMA method as set forth in claim 2 or 6, wherein the second chip time is later than the first chip time.
Claim 13
Dependent Claim
23 words
The W-CDMA method as set forth in claim 2 or 6, wherein the second chip time is earlier than the first chip time.
Claim 14
Dependent Claim
35 words
The W-CDMA method as set forth in claim 3 or 7, wherein the second chip time is later than the first chip time and the third chip time is earlier than the first chip time.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2002-05-31 | 2002-11-30 | 2003-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-05-31 | 2006-11-30 | 2007-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-05-31 | 2010-11-30 | 2011-06-01 | $7700.00 | Window Closed / Lapsed |