Method and apparatus for adaptive power control for spread-spectrum communications
First Claim
1. A code division multiple access subscriber unit comprising:
- an antenna configured to output a first radio frequency signal, the first radio frequency signal having a quadrature (Q) channel and an in-phase (I) channel; and
a circuit coupled to the antenna, the circuit being configured to generate power control bits based on a power level of a second radio frequency signal received from a base station and an interference level associated with the second radio frequency signal, wherein the power control bits are carried by one of the I and Q channels and not the other one of the I and Q channels, and the power control bits are spread coded and adapted to control an output power of the base station.
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Abstract
A code division multiple access subscriber unit comprises an antenna configured to output a radio frequency signal, the radio frequency signal having a quadrature (Q) channel and an in-phase (I) channel. A circuit coupled to the antenna, the circuit being configured to generate power control bits which are carried by one of the I and Q channels and not the other one of the I and Q channels, the power control bits are spread coded and are adapted to control an output power of a base station. The radio frequency signal is a first radio frequency signal, the circuit is further configured to generate the power control bits based on a power level of a second radio frequency signal output by a base station and an interference level associated with the second radio frequency signal.
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Citations
38 Claims
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1. A code division multiple access subscriber unit comprising:
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an antenna configured to output a first radio frequency signal, the first radio frequency signal having a quadrature (Q) channel and an in-phase (I) channel; and a circuit coupled to the antenna, the circuit being configured to generate power control bits based on a power level of a second radio frequency signal received from a base station and an interference level associated with the second radio frequency signal, wherein the power control bits are carried by one of the I and Q channels and not the other one of the I and Q channels, and the power control bits are spread coded and adapted to control an output power of the base station. - View Dependent Claims (2, 3, 4, 7, 8, 25)
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5. A code division multiple access subscriber unit comprising:
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an antenna configured to output a first radio frequency signal, the first radio frequency signal having a quadrature (Q) channel and an in-phase (I) channel; and a circuit coupled to the antenna, the circuit being configured to generate power control bits which are carried by one of the I and Q channels and not the other one of the I and Q channels, wherein the power control bits are spread coded and are adapted to control an output power of a base station; and wherein the other one of the I and Q channels carries user data produced as a result of an input supplied to the code division multiple access subscriber unit. - View Dependent Claims (6, 28, 30, 31)
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9. A code division multiple access subscriber unit, comprising:
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an antenna configured to receive a first radio frequency signal; and a circuit coupled to the antenna, the circuit configured to generate power control bits in response to the first radio frequency signal, wherein the power control bits are based on a power level of the first radio frequency signal and an interference level associated with the first radio frequency signal, the power control bits being adapted to control a power of a base station, the circuit being configured to spread code the power control bits and to generate an in-phase (I) channel and a quadrature (Q) channel, such that the spread coded power control bits are carried by one of the I and Q channels and not the other one of the I and Q channels, wherein the I and Q channels are carried by a second radio frequency signal output by the code division multiple access subscriber unit. - View Dependent Claims (10, 11, 12, 15, 16, 26)
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13. A code division multiple access subscriber unit, comprising:
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an antenna configured to receive a first radio frequency signal; and a circuit coupled to the antenna, the circuit configured to generate power control bits in response to the first radio frequency signal, the power control bits being adapted to control a power of a base station, the circuit being configured to spread code the power control bits and to generate an in-phase (I) channel and a quadrature (Q) channel, such that the spread coded power control bits are carried by one of the I and Q channels and not the other one of the I and Q channels, wherein the I and Q channels are carried by a second radio frequency signal output by the code division multiple access subscriber unit, wherein the other one of the I and Q channels carries user data produced as a result of an input supplied to the code division multiple access subscriber unit. - View Dependent Claims (14, 29, 33, 34, 35)
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17. A communication method, comprising:
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receiving a first radio frequency signal with a user antenna of a code division multiple access subscriber unit; generating power control bits in response to the first radio frequency signal, the power control bits being adapted to control a power of a base station; spread coding the power control bits; modulating a second radio frequency signal to carry an in-phase (I) channel and a quadrature (Q) channel, wherein one of the I and Q channels carries the spread coded power control bits and the other one of the I and Q channels does not carry the power control bits; and transmitting the second radio frequency signal, wherein the generating the power control bits is based on a power level of the first radio frequency signal and a noise level associated with the first radio frequency signal. - View Dependent Claims (18, 19, 20, 22, 23, 24)
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21. A communication method, comprising:
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receiving a first radio frequency signal with a user antenna of a code division multiple access subscriber unit; generating power control bits in response to the first radio frequency signal, the power control bits being adapted to control a power of a base station; spread coding the power control bits; modulating a second radio frequency signal to carry an in-phase (I) channel and a quadrature (Q) channel, wherein one of the I and Q channels carries the spread coded power control bits and the other one of the I and Q channels does not carry the power control bits; transmitting the second radio frequency signal; supplying signaling information to said one of the I and Q channels carrying the spread coded power control bits, wherein the signaling information is adapted to facilitate processing of signals by the base station; receiving an input to the code division multiple access subscriber unit; and supplying data based on the input to the other one of the I and Q channels. - View Dependent Claims (27, 32, 36, 37, 38)
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Specification