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US 6,721,350 B2Granted
Spread spectrum adaptive power control using a base station
AssigneeInterDigital Technology Corporation
InventorGary R. Lomp
Life of this patent
Estimating the term…
Abstract
In response to the base station receiving a received signal, the received signal having a first spread-spectrum signal and an interfering signal. An automatic gain control (AGC) circuit generates an AGC-output signal which is despread by a despreader and then processed as a received-power level. A power command signal is generated using a threshold test and the received-power level.
Claims11
A base station comprising:
- an automatic-gain-control (AGC) circuit, responsive to a received signal, for generating an AGC-output signal, with the received signal including a plurality of spread-spectrum user signals and an interfering signal;
- for each of the plurality of spread spectrum user signals:
- a correlator coupled to the AGC circuit for despreading the AGC-output signal using a code of that spread spectrum user signal;
- a power-measurement circuit coupled to the correlator, for processing the despread AGC-output signal as a received-power level;
- a comparator coupled to the power-measurement circuit for generating a comparison signal using a threshold and the received-power level;
- and
- a power-command circuit coupled to the comparator and responsive to the comparison signal for generating a power-command signal;
- and
- an antenna;
- and
- a transmitter coupled to the antenna and the power-command circuit for transmitting the power-command signals;
- and
- wherein each of the spread spectrum user signals having an associated setpoint of a signal to noise ratio based on a service option, and at least one of the spread spectrum user signals having a different setpoint from another of the spread spectrum user signals.
10 more elements
A base station comprising:
- automatic-gain-control (AGC) means, responsive to a received signal, with the received signal including a plurality of spread-spectrum user signals and an interfering signal, for generating an AGC-output signal and an AGC-control signal;
- for each of the plurality of spread spectrum user signals:
- correlator means for despreading the AGC-output signal as a despread
- AGC-output signal using a code of that spread spectrum user signal;
- power means for processing the despread AGC-output signal as a receiving-power level;
- and
- comparator means for generating a comparison signal using a threshold and the received-power level;
- and
- modulator means for converting the comparison signals to a power command signals;
- and
- transmitter means for transmitting the power-command signals;
- and
- wherein each of the spread spectrum user signals having an associated setpoint of a signal to noise ratio based on a service option, at least one of the spread spectrum user signals having a different setpoint from another of the spread spectrum user signals.
10 more elements
Dependencies are inferred from the claim text.