Transmitting power level controller and related method
First Claim
1. A transmitting power level controller of a communication system, the communication system comprising a radio-frequency (RF) unit for generating a communication signal and a power amplifier (PA) for amplifying the communication signal to generate a transmitting signal, the transmitting power level controller comprising:
- a temperature sensor, for sensing temperature of at least one of the RF unit and the PA to generate a detected temperature signal;
a power detector, for detecting a transmitting power of the transmit signal to generate a detected power signal; and
an automatic level controller, coupled to the temperature sensor and the power detector, for adjusting the transmitting power of the transmitting signal according to the detected power signal when a maximal transmitting power is in a predetermined range, and adjusting the transmitting power according to the detected temperature signal when the maximal transmitting power is not in the predetermined range.
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Abstract
A transmitting power level controller of a communication system includes a radio-frequency unit for generating a communication signal and a power amplifier for amplifying the communication signal to generate a transmitting signal. The transmitting power level controller has a temperature sensor, a power detector, and an automatic level controller. The temperature sensor senses temperature of at least one of the RF unit and the PA to generate a detected temperature signal. The power detector detects a transmitting power of the transmitting signal to generate a detected power signal. The automatic level controller is coupled to the temperature sensor and the power detector. The power detector adjusts the transmitting power of the transmit signal according to the detected power signal when a maximal transmitting power is in a predetermined range, and adjusts the transmitting power according to the detected temperature signal otherwise.
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Citations
22 Claims
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1. A transmitting power level controller of a communication system, the communication system comprising a radio-frequency (RF) unit for generating a communication signal and a power amplifier (PA) for amplifying the communication signal to generate a transmitting signal, the transmitting power level controller comprising:
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a temperature sensor, for sensing temperature of at least one of the RF unit and the PA to generate a detected temperature signal; a power detector, for detecting a transmitting power of the transmit signal to generate a detected power signal; and an automatic level controller, coupled to the temperature sensor and the power detector, for adjusting the transmitting power of the transmitting signal according to the detected power signal when a maximal transmitting power is in a predetermined range, and adjusting the transmitting power according to the detected temperature signal when the maximal transmitting power is not in the predetermined range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for adjusting transmitting power level of a communication system, wherein the communication system comprises a radio-frequency (RF) unit for generating a communication signal and a power amplifier (PA) for amplifying the communication signal to generate a transmitting signal, the method comprising:
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sensing temperature of at least one of the RF unit and the PA to generate a detected temperature signal; detecting a transmitting power of the transmitting signal to generate a detected power signal; and adjusting the transmitting power of the transmitting signal according to the detected power signal when a maximal transmitting power is in a predetermined range, and adjusting the transmitting power according to the detected temperature signal when the maximal transmitting power is not in the predetermined range. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A transmitting power level controller of a communication system, the communication system comprising a radio-frequency (RF) unit for generating a communication signal and a power amplifier (PA) for amplifying the communication signal to generate a transmitting signal, the transmitting power level controller comprising:
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a temperature sensor, for sensing temperature of at least one of the RF unit and the PA to generate a detected temperature signal; a power detector, for detecting a transmitting power of the transmit signal to generate a detected power signal; and an automatic level controller, coupled to the temperature sensor and the power detector, for adjusting the transmitting power of the transmitting signal according to the detected power signal when a maximal transmitting power is in a predetermined range, and adjusting the transmitting power according to the detected temperature signal otherwise, and the automatic level controller comprises a power setting unit comprising; a subtracting unit, for generating a difference according to the detected power signal and a target transmitting power; a weighting unit, coupled to the subtracting unit, for generating a weighted difference according to the difference; and an average unit, coupled to the weighting unit, for generating an average difference according to an output signal of the weighting unit wherein the automatic level controller adjusts the transmitting power according to the average difference.
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21. A transmitting power level controller of a communication system, the communication system comprising a radio-frequency (RF) unit for generating a communication signal and a power amplifier (PA) for amplifying the communication signal to generate a transmitting signal, the transmitting power level controller comprising:
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a temperature sensor, for sensing temperature of at least one of the RF unit and the PA to generate a detected temperature signal; a power detector, for detecting a transmitting power of the transmit signal to generate a detected power signal; an automatic level controller, coupled to the temperature sensor and the power detector, for adjusting the transmitting power of the transmitting signal according to the detected power signal when a maximal transmitting power is in a predetermined range, and adjusting the transmitting power according to the detected temperature signal otherwise; a comparator, for comparing the maximal transmitting power and a threshold to generate a comparison result; a multiplexer (MUX), coupled to the comparator, the temperature sensor and the power detector, for selectively outputting the detected power signal or the detected temperature signal as an output signal according to the comparison result; a programmable gain amplifier (PGA), coupled to the MUX, for amplifying the output signal to generate an amplified output signal; an analog-to-digital converter (ADC), coupled to the PGA, for converting the amplified output signal to a digital output signal; an accumulator, coupled to the ADC, for generating an accumulation signal by accumulating the digital output signal; and a look-up table, coupled to the accumulator, for converting the accumulation signal to a measured temperature or a measured power; wherein the automatic level controller adjusts the transmitting power according to the measured temperature or the measured power.
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22. A method for adjusting transmitting power level of a communication system, wherein the communication system comprises a radio-frequency (RF) unit for generating a communication signal and a power amplifier (PA) for amplifying the communication signal to generate a transmitting signal, the method comprising:
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sensing temperature of at least one of the RF unit and the PA to generate a detected temperature signal; detecting a transmitting power of the transmitting signal to generate a detected power signal; adjusting the transmitting power of the transmitting signal according to the detected power signal when a maximal transmitting power is in a predetermined range, and adjusting the transmitting power according to the detected temperature signal otherwise; generating a difference according to the detected power signal and the transmitting power; generating a weighted difference according to the difference; generating an average difference according to the weighted difference; and adjusting the transmitting power according to the average difference.
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Specification