US6370109B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
CDMA signal power control using quadrature signal calculations
Assignee: Qualcomm Inc
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Filing: 1999-03-10
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Granted: 2002-04-09
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Expires: 2019-03-10
Abstract
Abstract The invention is CDMA quadrature signal technology that controls the transmit power of a CDMA signal. The CDMA quadrature signal technology receives a CDMA signal, and in response, process quadrature components of the CDMA signal to generate a power control signal. The CDMA quadrature signal technology adjusts the gain of the CDMA signal in response to the power control signal. A CDMA transmitter transmits the CDMA signal after the gain is adjusted. One example of the CDMA transmitter is a CDMA base station. Using the invention, a multi-sector CDMA base station can control power without transferring gain information to base station components for all sectors. The invention eliminates unnecessary data transfer and storage.
Inventors
- 👤 Bruce S. Schwartz
- 👤 Brian K. Harms
- 👤 Anthony C. K. Soong
- 👤 Todd A. Pressley
- 👤 Robin D. Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:54
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/52
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
121 words
A method for transmitting a Code Division Multiple Access (CDMA) signal, the method comprising receiving the CDMA signal; in response to receiving the CDMA signal, processing quadrature components of the CDMA signal to generate a power control signal; adjusting gain of the CDMA signal in response to the power control signal; and transmitting the CDMA signal after adjusting the gain; wherein processing the quadrature components of the CDMA signal to generate the power control signal further comprises: processing the quadrature components of the CDMA signal to determine a quadrature CDMA signal power value; monitoring transmit power of the CDMA signal; comparing the quadrature CDMA signal power value to the transmit power; and generating the power control signal based on the comparison.
Claim 2
Independent Claim
121 words
A method for transmitting a Code Division Multiple Access (CDMA) signal, the method comprising receiving the CDMA signal; in response to receiving the CDMA signal, processing quadrature components of the CDMA signal to generate a power control signal; adjusting gain of the CDMA signal in response to the power control signal; and transmitting the CDMA signal after adjusting the gain; wherein processing the quadrature components of the CDMA signal to generate the power control signal further comprises: processing the quadrature components of the CDMA signal to determine a quadrature CDMA signal power value; monitoring transmit power of the CDMA signal; comparing the quadrature CDMA signal power value to the transmit power; and generating the power control signal based on the comparison.
Claim 3
Dependent Claim
63 words
The method of claim 1 wherein processing the quadrature components of the CDMA signal to determine a quadrature CDMA signal power value further comprises: squaring a quadrature I component of the CDMA signal; squaring a quadrature Q component of the CDMA signal; and summing the squared quadrature I component of the CDMA signal and the squared quadrature Q component of the CDMA signal.
Claim 4
Dependent Claim
71 words
The method of claim 1 wherein comparing the quadrature CDMA signal power value to the transmit power and generating the power control signal based on the comparison further comprises: determining a ratio of the transmit power to the quadrature CDMA signal power value; comparing the ratio to a pre-determined value; and generating the power control signal to adjust the gain to change the ratio to be closer to the pre-determined value.
Claim 5
Dependent Claim
11 words
The method of claim 1 further comprising generating the CDMA signal.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein the method is performed by a multi-sector CDMA base station.
Claim 7
Dependent Claim
28 words
The method of claim 1 wherein adjusting gain of the CDMA signal comprises adjusting gain of the CDMA signal without transferring per call gains to gain control circuitry.
Claim 8
Dependent Claim
28 words
The method of claim 1 further comprising, in response to receiving the CDMA signal, processing the quadrature components of the CDMA signal to generate a capacity control signal.
Claim 9
Dependent Claim
15 words
The method of claim 7 wherein the capacity control signal indicates excess forward link capacity.
Claim 10
Dependent Claim
17 words
The method of claim 8 wherein the excess forward link capacity is a number of simultaneous calls.
Claim 11
Dependent Claim
115 words
A Code Division Multiple Access (CDMA) device comprising: quadrature signal logic that is operational to receive and process quadrature components of the CDMA signal to generate a power control signal; gain circuitry that is operational to automatically adjust a gain of the CDMA signal in response to the power control signal and; a power monitor that is operational to monitor transmit power of the CDMA signal, and wherein the quadrature signal logic is further operational to process the quadrature components of the CDMA signal and determine a quadrature CDMA signal power value, to compare the quadrature CDMA signal power value to the transmit power, and to generate the power control signal based on the comparison.
Claim 12
Dependent Claim
115 words
A Code Division Multiple Access (CDMA) device comprising: quadrature signal logic that is operational to receive and process quadrature components of the CDMA signal to generate a power control signal; gain circuitry that is operational to automatically adjust a gain of the CDMA signal in response to the power control signal and; a power monitor that is operational to monitor transmit power of the CDMA signal, and wherein the quadrature signal logic is further operational to process the quadrature components of the CDMA signal and determine a quadrature CDMA signal power value, to compare the quadrature CDMA signal power value to the transmit power, and to generate the power control signal based on the comparison.
Claim 13
Dependent Claim
56 words
The CDMA device of claim 10 wherein the quadrature signal logic is further operational to square a quadrature I component of the CDMA signal, to square a quadrature Q component of the CDMA signal, and to sum the squared quadrature I component of the CDMA signal and the squared quadrature Q component of the CDMA signal.
Claim 14
Dependent Claim
59 words
The CDMA device of claim 10 wherein the quadrature signal logic is further operational to determine a ratio of the transmit power to the quadrature CDMA signal power value, to compare the ratio to a pre-determined value, and to generate the power control signal to adjust the gain to change the ratio to be closer to the pre-determined value.
Claim 15
Dependent Claim
15 words
The CDMA device of claim 10 wherein the device is a multi-sector CDMA base station.
Claim 16
Dependent Claim
18 words
The CDMA device of claim 10 further comprising a cell site modem operational to generate the CDMA signal.
Claim 17
Dependent Claim
21 words
The CDMA device of claim 14 further comprising a digital-to-analog converter operational to convert the CDMA signal from digital to analog.
Claim 18
Dependent Claim
23 words
The CDMA device of claim 15 further comprising a low-pass filter operational to attenuate portions of the CDMA signal outside of a bandwidth.
Claim 19
Dependent Claim
22 words
The CDMA device of claim 16 further comprising an up-converter operational to convert the CDMA signal to a radio frequency CDMA signal.
Claim 20
Dependent Claim
17 words
The CDMA device of claim 17 further comprising a power amplifier operational to amplify the CDMA signal.
Claim 21
Dependent Claim
16 words
The CDMA device of claim 18 further comprising an antenna operational to transmit the CDMA signal.
Claim 22
Dependent Claim
27 words
The CDMA device of claim 10 wherein the quadrature signal logic is further operational to generate the power control signal without using information indicating per call gains.
Claim 23
Dependent Claim
29 words
The CDMA device of claim 10 wherein the quadrature signal logic is further operational to process the quadrature components of the CDMA signal to generate a capacity control signal.
Claim 24
Dependent Claim
16 words
The CDMA device of claim 21 wherein the capacity control signal indicates excess forward link capacity.
Claim 25
Dependent Claim
18 words
The CDMA device of claim 22 wherein the excess forward link capacity is a number of simultaneous calls.
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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) | 2005-04-08 | 2005-10-08 | 2006-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-08 | 2009-10-08 | 2010-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-08 | 2013-10-08 | 2014-04-09 | $7700.00 | Window Closed / Lapsed |