Method and system for power control in a communication system
First Claim
1. An apparatus for a wireless communication system, the apparatus comprising:
- a receiver configured to receive a transmitted signal from a transmitter having at least a first data rate and a second data rate that is other than the first data rate, wherein a transmitted power of the transmitted signal for the second data rate is adjustable by an offset amount relative to a transmitted power for the first data rate;
a receiver circuit configured to determine a reference signal characteristic associated with the transmitted signal; and
a processing circuit configured to compare the reference signal characteristic to a target and to generate a power control command based at least in part on the comparison and on information provided by the transmitted signal.
1 Assignment
0 Petitions
Accused Products
Abstract
Apparatus and methods efficiently estimate signal-to-noise ratios of a received signal irrespective of intentional adjustments to transmitting power due to fluctuating data rates. For example, in one embodiment, the variation in power due to the change in data rate is decoupled from environmental sources for variations in power. In one embodiment, the signal to noise ratio is adjusted for the data rate. In another embodiment, another signal is used as a reference for the signal to noise computation. This advantageously permits a system to efficiently and accurately control power in a power control loop for efficient use of spectral bandwidth and for relatively good grade of service (GoS).
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Citations
37 Claims
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1. An apparatus for a wireless communication system, the apparatus comprising:
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a receiver configured to receive a transmitted signal from a transmitter having at least a first data rate and a second data rate that is other than the first data rate, wherein a transmitted power of the transmitted signal for the second data rate is adjustable by an offset amount relative to a transmitted power for the first data rate; a receiver circuit configured to determine a reference signal characteristic associated with the transmitted signal; and a processing circuit configured to compare the reference signal characteristic to a target and to generate a power control command based at least in part on the comparison and on information provided by the transmitted signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of controlling power in a wireless communication system, the method comprising:
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receiving from a transmitter a transmitted signal having at least a first data rate and a second data rate that is other than the first data rate, wherein a transmitted power of the transmitted signal for the second data rate is adjustable by an offset value relative to a transmitted power for the first data rate; determining a reference signal characteristic associated with the transmitted signal; comparing the reference signal characteristic to a target; and generating a power control command based at least in part on the comparison and on information provided by the transmitted signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of determining a reference signal characteristic, the method comprising;
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determining a signal characteristic of a received signal; adjusting the signal characteristic with an offset value to account for an adjustment in power due to an adjustment in code rate; and using the adjusted signal characteristic for power control.
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26. A method of determining a signal characteristic, the method comprising:
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determining a signal characteristic of a received signal; separating a first component of the signal characteristic due to channel conditions and a second component due to a power adjustment from a change in data rate; and using the first component of the signal characteristic for power control.
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27. A computer-readable storage medium having a set of computer-executable instructions, the computer-executable instructions comprising:
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a first set of instructions for receiving from a transmitter a transmitted signal having at least a first data rate and a second data rate that is other than the first data rate, wherein a transmitted power of the transmitted signal for the second data rate is adjustable by an offset value relative to a transmitted power for the first data rate; a second set of instructions for determining a reference signal characteristic associated with the transmitted signal; a third set of instructions for comparing the reference signal characteristic to a target; and a fourth set of instructions for generating a power control command based at least in part on the comparison and on information provided by the transmitted signal.
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28. A computer-readable storage medium having a set of computer-executable instructions, he computer-executable instructions comprising:
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a first set of instruction for determining a signal characteristic of a received signal; a second set of instructions for adjusting the signal characteristic with an offset value to account for an adjustment in power due to an adjustment in code rate; and a third set of instructions for using the adjusted signal characteristic for power control.
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29. A computer-readable storage medium having a set of computer-executable instructions, the computer-executable instructions comprising:
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a first set of instructions for determining a signal characteristic of a received signal; a second set of instructions for separating a first component of the signal characteristic due to channel conditions and a second component due to a power adjustment from a change in data rate; and a third set of instructions for further comprising using the first component of the signal characteristic for power control.
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30. An apparatus for controlling power of a wireless communication system, the apparatus comprising:
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means for receiving from a transmitter a transmitted signal having at least a first data rate and a second data rate that is other than the first data rate, wherein a transmitted power of the transmitted signal for the second data rate is adjustable by an offset value relative to a transmitted power for the find data rate; means for determining a reference signal characteristic associated with the transmitted signal; means for comparing the reference signal characteristic to a target; and means for generating a power control command based at least in part on the comparison and on information provided by the transmitted signal. - View Dependent Claims (31, 32, 33)
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34. An apparatus for determining a reference signal characteristic, the apparatus comprising:
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means for determining a signal characteristic of a received signal; means for adjusting the signal characteristic with an offset value to account for an adjustment in power due to an adjustment in code rate; and means for using the adjusted signal characteristic in a power control loop. - View Dependent Claims (35)
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36. An apparatus for determining a signal characteristic, the apparatus comprising:
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means for determining a signal characteristic of a received signal; means for separating a first component of the signal characteristic due to channel conditions and a second component due to a power adjustment from change in data rate; and means for using the first component of the signal characteristic for power control. - View Dependent Claims (37)
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Specification