Average power control of wireless transmission having a variable duty cycle
First Claim
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1. A method of controlling a transmission signal power level of a transmitter, comprising:
- receiving a target power level;
determining duty cycle of a transmission signal that indicates power on and power off periods over a predetermined sensing interval;
sensing a transmission signal power level;
adjusting the transmission signal power level to be approximately equal to the target power level divided by the duty cycle;
receiving a transmission indicator that is active during transmission of signals;
at least sensing the transmission signal power level while the transmission indicator is active.
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Abstract
A method an apparatus for controlling a transmission signal power level of a transmitter is disclosed. The method includes receiving a root-mean-squared target power level. A duty cycle of a transmission signal is determined that indicates power on and power off periods over a predetermined sensing interval. A transmission signal power level is sensed. The transmission signal power level is adjusted to be approximately equal to the target power level divided by the duty cycle.
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Citations
18 Claims
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1. A method of controlling a transmission signal power level of a transmitter, comprising:
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receiving a target power level; determining duty cycle of a transmission signal that indicates power on and power off periods over a predetermined sensing interval; sensing a transmission signal power level; adjusting the transmission signal power level to be approximately equal to the target power level divided by the duty cycle; receiving a transmission indicator that is active during transmission of signals; at least sensing the transmission signal power level while the transmission indicator is active. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A UWB transmitter comprising:
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a power detector for detecting an instantaneous power level of a transmission signal of the transmitter; an adjustable gain amplifier for adjusting the instantaneous power level of the transmission signal; a controller for receiving a target power level, and setting the adjustable gain amplifier, wherein the instantaneous power level is made substantially equal to the target power level divided by a duty cycle of the transmission signal; taking M measurements of a power level of a transmission packet; computing a first instantaneous power level by averaging the M measurements; sensing the first instantaneous power level of N transmission packets; and computing the instantaneous power level by detecting the maximum first instantaneous power level of the N transmission packets. - View Dependent Claims (16, 17, 18)
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15. A UWB transmitter comprising:
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a power detector for detecting an instantaneous power level of a transmission signal of the transmitter; an adjustable gain amplifier for adjusting the instantaneous power level of the transmission signal; a controller for receiving a target power level, and setting the adjustable gain amplifier, wherein the instantaneous power level is made substantially equal to the target power level divided by a duty cycle of the transmission signal; taking M measurements of a power level of a transmission packet; computing a first instantaneous power level by averaging the M measurements; wherein sensing the instantaneous power level of the transmission signal, comprises; sensing the first instantaneous power level of N transmission packets; and computing the instantaneous power level averaging the first instantaneous power level of the N transmission packets.
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Specification