US5299226A
Expired / Lapsed
US
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Adaptive power control for a spread spectrum communications system and method
Assignee: InterDigital Technology Corp
•
Filing: 1991-11-19
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Granted: 1994-03-29
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Expires: 2011-11-19
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 first spread-spectrum signal. A mobile station has an automatic-gain-control circuit for generating an AGC-output signal, from a received signal. The received signal includes the first spread-spectrum signal and an interfering signal. The mobile station also has a correlator for despreading the AGC-output signal, a power-measurement circuit responsive to processing the received signal with the despread AGC-output signal for generating a received-power level, a comparator coupled to the power-measurement circuit for generating a comparison signal by comparing the received-power level to a threshold level, a transmitter for transmitting a second spread-spectrum signal, an antenna, and a variable-gain device responsive to the comparison signal for adjusting a transmitter-power level of the second spread-spectrum signal.
Inventors
- 👤 Donald L. Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:07
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; H04B1/709
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
148 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, wherein a base station transmits a first spread-spectrum signal, said mobile station comprising: AGC means responsive to a received signal, wherein the received signal includes the first spread-spectrum signal and an interfering signal, for generating an AGC-output signal; correlator means for despreading the AGC-output signal; power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes means for multiplying the received signal with the depread AGC-output signal, for generating a received-power level; comparator means for generating a comparison signal by comparing the received-power level to a threshold level; transmitter means for transmitting a second spread-spectrum signal; an antenna; and variable-gain means responsive to said comparison signal for adjusting a transmitter-power level of the second spread-spectrum signal from said transmitter means.
Claim 2
Independent Claim
148 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, wherein a base station transmits a first spread-spectrum signal, said mobile station comprising: AGC means responsive to a received signal, wherein the received signal includes the first spread-spectrum signal and an interfering signal, for generating an AGC-output signal; correlator means for despreading the AGC-output signal; power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes means for multiplying the received signal with the depread AGC-output signal, for generating a received-power level; comparator means for generating a comparison signal by comparing the received-power level to a threshold level; transmitter means for transmitting a second spread-spectrum signal; an antenna; and variable-gain means responsive to said comparison signal for adjusting a transmitter-power level of the second spread-spectrum signal from said transmitter means.
Claim 3
Independent Claim
150 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, wherein a base station transmits a first spread-spectrum signal, said mobile station comprising: AGC means responsive to a received signal, wherein the received signal includes the first spread-spectrum signal and an interfering signal, for generating an AGC-output signal; correlator means for despreading the AGC-output signal; power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes logarithmic means for adding the received signal with the depread AGC-output signal, for generating a received power level; comparator means for generating a comparison signal by comparing the received-power level to a threshold level; transmitter means for transmitting a second spread-spectrum signal; an antenna; and variable-gain means responsive to said comparison signal for adjusting a transmitter-power level of the second spread-spectrum signal from said transmitter means.
Claim 4
Independent Claim
150 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, wherein a base station transmits a first spread-spectrum signal, said mobile station comprising: AGC means responsive to a received signal, wherein the received signal includes the first spread-spectrum signal and an interfering signal, for generating an AGC-output signal; correlator means for despreading the AGC-output signal; power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes logarithmic means for adding the received signal with the depread AGC-output signal, for generating a received power level; comparator means for generating a comparison signal by comparing the received-power level to a threshold level; transmitter means for transmitting a second spread-spectrum signal; an antenna; and variable-gain means responsive to said comparison signal for adjusting a transmitter-power level of the second spread-spectrum signal from said transmitter means.
Claim 5
Independent Claim
82 words
An apparatus for determining a received-power level of a spread-spectrum signal, when a received signal includes the spread-spectrum signal and an interfering signal, comprising: AGC means responsive to the received signal for generating an AGC-output signal; correlator means, including a differential amplifier, for despreading the AGC-output signal; and power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes means for multiplying the received signal with the despread AGC-output signal, for generating a received-power level.
Claim 6
Independent Claim
82 words
An apparatus for determining a received-power level of a spread-spectrum signal, when a received signal includes the spread-spectrum signal and an interfering signal, comprising: AGC means responsive to the received signal for generating an AGC-output signal; correlator means, including a differential amplifier, for despreading the AGC-output signal; and power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes means for multiplying the received signal with the despread AGC-output signal, for generating a received-power level.
Claim 7
Independent Claim
83 words
An apparatus for determining a received-power level of a spread-spectrum signal, when a received signal includes the spread-spectrum signal and an interfering signal, comprising: AGC means responsive to the received signal for generating an AGC-output signal; correlator means, including a differential amplifier, for despreading the AGC-output signal; and power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes logarithmic means for adding the received signal with the despread AGC-output signal, for generating a received-power level.
Claim 8
Independent Claim
83 words
An apparatus for determining a received-power level of a spread-spectrum signal, when a received signal includes the spread-spectrum signal and an interfering signal, comprising: AGC means responsive to the received signal for generating an AGC-output signal; correlator means, including a differential amplifier, for despreading the AGC-output signal; and power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes logarithmic means for adding the received signal with the despread AGC-output signal, for generating a received-power level.
Claim 9
Independent Claim
163 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, wherein a base station transmits a first spread-spectrum signal and an APC-data signal, said mobile station comprising: decoder means for decoding the APC-data signal as a threshold level; AGC means responsive to a received signal, wherein the received signal includes the first spread-spectrum signal and an interfering signal, for generating an AGC-output signal; correlator means for despreading the AGC-output signal; power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes means for multiplying the received signal with the despread AGC-output signal, for generating a received-power level; comparator means for generating a comparison signal by comparing the received-power level to said threshold level; transmitter means for transmitting a second spread-spectrum signal; an antenna; and variable-gain means responsive to said comparison signal for adjusting a transmitter-power level of the second spread-spectrum signal from said transmitter means.
Claim 10
Independent Claim
163 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, wherein a base station transmits a first spread-spectrum signal and an APC-data signal, said mobile station comprising: decoder means for decoding the APC-data signal as a threshold level; AGC means responsive to a received signal, wherein the received signal includes the first spread-spectrum signal and an interfering signal, for generating an AGC-output signal; correlator means for despreading the AGC-output signal; power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes means for multiplying the received signal with the despread AGC-output signal, for generating a received-power level; comparator means for generating a comparison signal by comparing the received-power level to said threshold level; transmitter means for transmitting a second spread-spectrum signal; an antenna; and variable-gain means responsive to said comparison signal for adjusting a transmitter-power level of the second spread-spectrum signal from said transmitter means.
Claim 11
Independent Claim
164 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, wherein a base station transmits a first spread-spectrum signal and an APC-data signal, said mobile station comprising: decoder means for decoding the APC-data signal as a threshold level; AGC means responsive to a received signal, wherein the received signal includes the first spread-spectrum signal and an interfering signal, for generating an AGC-output signal; correlator means for despreading the AGC-output signal; power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes logarithmic means for adding the received signal with the despread AGC-output signal, for generating a received-power level; comparator means for generating a comparison signal by comparing the received-power level to said threshold level; transmitter means for transmitting a second spread-spectrum signal; an antenna; and variable-gain means responsive to said comparison signal for adjusting a transmitter-power level of the second spread-spectrum signal from said transmitter means.
Claim 12
Independent Claim
164 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, wherein a base station transmits a first spread-spectrum signal and an APC-data signal, said mobile station comprising: decoder means for decoding the APC-data signal as a threshold level; AGC means responsive to a received signal, wherein the received signal includes the first spread-spectrum signal and an interfering signal, for generating an AGC-output signal; correlator means for despreading the AGC-output signal; power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes logarithmic means for adding the received signal with the despread AGC-output signal, for generating a received-power level; comparator means for generating a comparison signal by comparing the received-power level to said threshold level; transmitter means for transmitting a second spread-spectrum signal; an antenna; and variable-gain means responsive to said comparison signal for adjusting a transmitter-power level of the second spread-spectrum signal from said transmitter means.
Claim 13
Independent Claim
78 words
An apparatus for determining a received-power level of a spread-spectrum signal, when a received signal includes the spread-spectrum signal and an interfering signal, comprising: AGC means responsive to the received signal for generating an AGC-output signal; correlator means for despreading the AGC-output signal; and power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes means for multiplying the received signal with the despread AGC-output signal, for generating a received-power level.
Claim 14
Independent Claim
78 words
An apparatus for determining a received-power level of a spread-spectrum signal, when a received signal includes the spread-spectrum signal and an interfering signal, comprising: AGC means responsive to the received signal for generating an AGC-output signal; correlator means for despreading the AGC-output signal; and power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes means for multiplying the received signal with the despread AGC-output signal, for generating a received-power level.
Claim 15
Independent Claim
79 words
An apparatus for determining a received-power level of a spread-spectrum signal, when a received signal includes the spread-spectrum signal and an interfering signal, comprising: AGC means responsive to the received signal for generating an AGC-output signal; correlator means for despreading the AGC-output signal; and power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes logarithmic means for adding the received signal with the despread AGC-output signal, for generating a received-power level.
Claim 16
Independent Claim
79 words
An apparatus for determining a received-power level of a spread-spectrum signal, when a received signal includes the spread-spectrum signal and an interfering signal, comprising: AGC means responsive to the received signal for generating an AGC-output signal; correlator means for despreading the AGC-output signal; and power means responsive to processing the received signal with the despread AGC-output signal, wherein said power means includes logarithmic means for adding the received signal with the despread AGC-output signal, for generating a received-power level.
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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) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
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