Automatic power control system for a code division multiple access (CDMA) communications system
First Claim
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1. A code division multiple access (CDMA) subscriber unit comprising:
- circuitry configured to receive at least one power control command on a forward channel, wherein the at least one power control command indicates either an increase or decrease in transmission power level; and
circuitry configured to adjust transmission power levels, of both a first reverse channel including traffic data and a second reverse channel including pilot bits, based on a value of the at least one power control command, wherein the transmission power levels of the first reverse channel and the second reverse channel are different.
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Abstract
A receiver receives signals and noise over a frequency spectrum of a desired received signal. The desired received signal is spread using code division multiple access. The received signals and noise are demodulated to produce a demodulated signal. The demodulated signal is despread using a code uncorrelated with a code associated with the desired received signal. A power level of the despread demodulated signal is measured as an estimate of the noise level of the frequency spectrum.
680 Citations
24 Claims
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1. A code division multiple access (CDMA) subscriber unit comprising:
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circuitry configured to receive at least one power control command on a forward channel, wherein the at least one power control command indicates either an increase or decrease in transmission power level; and circuitry configured to adjust transmission power levels, of both a first reverse channel including traffic data and a second reverse channel including pilot bits, based on a value of the at least one power control command, wherein the transmission power levels of the first reverse channel and the second reverse channel are different. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method implemented in a code division multiple access (CDMA) subscriber unit, the method comprising:
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receiving at least one power control command on a forward channel, wherein the at least one power control command indicates either an increase or a decrease in transmission power level; and adjusting transmission power levels, of both a first reverse channel including traffic data and a second reverse channel including pilot bits, based on a value of the at least one power control command, wherein the transmission power levels of the first reverse channel and the second reverse channel are different. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A code division multiple access (CDMA) subscriber unit comprising:
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an antenna; and a modem, operatively coupled to the antenna; and the antenna and the modem are configured to receive at least one power control command on a forward channel, wherein the at least one power control command indicates either an increase or decrease in transmission power level; and the modem is further configured to adjust transmission power levels, of both a first reverse channel including traffic data and a second reverse channel including pilot bits, based on a value of the at least one power control command wherein the transmission power levels of the first reverse channel and the second reverse channel are different; and the modem and the antenna are configured to transmit the first reverse channel and the second reverse channel. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification