Patent US5093840A successfully refreshed from Google Patents.
US5093840A
Expired / Lapsed
US
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Adaptive power control for a spread spectrum transmitter
Assignee: InterDigital Technology Corp
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Filing: 1990-11-16
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Granted: 1992-03-03
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Expires: 2010-11-16
Abstract
Abstract An apparatus for adaptive-power control of a spread-spectrum transmitter of a mobile station operating in a cellular-communications network using spread-spectrum modulation. A base station transmits a generic spread-spectrum signal and an APC-data signal. A mobile station has an acquisition circuit for acquiring and decoding the generic spread-spectrum signal, a detector for detecting a received power level of the generic spread-spectrum signal, a decoder for decoding the APC-data signal as a threshold, a differential amplifier for generating a comparison signal by comparing the received power level to the threshold, a transmitter for transmitting a transmitter spread-spectrum signal, an antenna, and a variable-gain device responsive to the comparison signal indicating an increase or decrease for adjusting a transmitter-power level of the transmitter spread-spectrum signal.
Inventors
- 👤 Donald L. Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:57
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/22; H04W52/221; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/7073; H04B1/7075; H04W52/06; H04W52/14; H04W52/146; H04W52/225; H04W52/228; H04W52/24; H04W52/245; H04W52/246; H04W52/52
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
166 words
An apparatus for adaptive-power control of a spread-spectrum transmitter of a mobile station operating in a cellular-communications network using spread-spectrum modulation, comprising: a base station for transmitting a generic spread-spectrum signal and an APC-data signal; a multiplicity of said mobile stations, each mobile station having an acquisition circuit for acquiring and decoding the generic spread-spectrum signal; a detector coupled to said acquisition circuit for detecting a received power level of the generic spread-spectrum signal; a decoder coupled to said acquisition circuit for decoding the APC-data signal as a threshold; a differential amplifier coupled to said detector and said decoder for generating a comparison signal by comparing the received power level to said threshold; a transmitter for transmitting a transmitter spread-spectrum signal; an antenna coupled to said transmitter; and a variable-gain device coupled to said differential amplifier and between said transmitter and said antenna, responsive to said comparison signal indicating an increase or decrease for adjusting a transmitter-power level of the transmitter spread-spectrum signal from said transmitter.
Claim 2
Independent Claim
166 words
An apparatus for adaptive-power control of a spread-spectrum transmitter of a mobile station operating in a cellular-communications network using spread-spectrum modulation, comprising: a base station for transmitting a generic spread-spectrum signal and an APC-data signal; a multiplicity of said mobile stations, each mobile station having an acquisition circuit for acquiring and decoding the generic spread-spectrum signal; a detector coupled to said acquisition circuit for detecting a received power level of the generic spread-spectrum signal; a decoder coupled to said acquisition circuit for decoding the APC-data signal as a threshold; a differential amplifier coupled to said detector and said decoder for generating a comparison signal by comparing the received power level to said threshold; a transmitter for transmitting a transmitter spread-spectrum signal; an antenna coupled to said transmitter; and a variable-gain device coupled to said differential amplifier and between said transmitter and said antenna, responsive to said comparison signal indicating an increase or decrease for adjusting a transmitter-power level of the transmitter spread-spectrum signal from said transmitter.
Claim 3
Independent Claim
120 words
An apparatus for adaptive-power control of a spread-spectrum transmitter of a plurality of mobile stations operating in a cellular-communications network using spread-spectrum modulation, wherein a base station transmits a generic spread-spectrum signal and an APC-data signal, each mobile station comprising: acquisition means for acquiring and decoding the generic spread-spectrum signal; detector means for detecting a received power level of the generic spread-spectrum signal; decoder means for decoding the APC-data signal as a threshold; differential means for generating a comparison signal by comparing the received power level to said threshold; transmitter means for transmitting a transmitter spread-spectrum signal; an antenna; and variable-gain means responsive to said comparison signal for adjusting a transmitter-power level of the transmitter spread-spectrum signal from said transmitter.
Claim 4
Independent Claim
120 words
An apparatus for adaptive-power control of a spread-spectrum transmitter of a plurality of mobile stations operating in a cellular-communications network using spread-spectrum modulation, wherein a base station transmits a generic spread-spectrum signal and an APC-data signal, each mobile station comprising: acquisition means for acquiring and decoding the generic spread-spectrum signal; detector means for detecting a received power level of the generic spread-spectrum signal; decoder means for decoding the APC-data signal as a threshold; differential means for generating a comparison signal by comparing the received power level to said threshold; transmitter means for transmitting a transmitter spread-spectrum signal; an antenna; and variable-gain means responsive to said comparison signal for adjusting a transmitter-power level of the transmitter spread-spectrum signal from said transmitter.
Claim 5
Dependent Claim
37 words
The apparatus as set forth in claim 2 wherein said acquisition means includes: a first chip-code generator; a first bandpass filter; and a first product device coupled to said first chip code generator and said bandpass filter.
Claim 6
Dependent Claim
16 words
The apparatus as set forth in claim 2 wherein said differential means includes: a differential amplifier.
Claim 7
Dependent Claim
16 words
The apparatus as set forth in claim 2 wherein said decoder means includes: a data demodulator.
Claim 8
Dependent Claim
16 words
The apparatus as set forth in claim 2 wherein said variable-gain means includes: a variable-gain attenuator.
Claim 9
Dependent Claim
16 words
The apparatus as set forth in claim 2 wherein said variable-gain means includes: a variable-gain amplifier.
Claim 10
Independent Claim
105 words
A method for adaptive-power control of a spread-spectrum transmitter of a plurality of mobile stations operating in a cellular-communication network using spread-spectrum modulating, wherein a base station transmits a generic spread-spectrum signal and an APC-data signal, said method comprising the steps at each mobile station, of: acquiring and decoding the generic spread-spectrum signal; detecting a received power level of the generic spread-spectrum signal; decoding the APC-data signal as a threshold; generating a comparison signal by comparing the received power level to said threshold; transmitting a transmitter spread-spectrum signal; and adjusting a transmitter-power level of the transmitter spread-spectrum signal from said transmitter using said comparison signal.
Claim 11
Independent Claim
105 words
A method for adaptive-power control of a spread-spectrum transmitter of a plurality of mobile stations operating in a cellular-communication network using spread-spectrum modulating, wherein a base station transmits a generic spread-spectrum signal and an APC-data signal, said method comprising the steps at each mobile station, of: acquiring and decoding the generic spread-spectrum signal; detecting a received power level of the generic spread-spectrum signal; decoding the APC-data signal as a threshold; generating a comparison signal by comparing the received power level to said threshold; transmitting a transmitter spread-spectrum signal; and adjusting a transmitter-power level of the transmitter spread-spectrum signal from said transmitter using said comparison signal.
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) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |