Abstract:
A method and apparatus for power detection in a multi-mode communication device configured for operation in different modes or frequency bands. A detector monitors the power level of an amplified outgoing signal. The detector may be configured with a switch and two or more samplers. Responsive to the mode of operation, the detector adopts an optimal configuration to generate a power level feedback signal, which is provided to a digital signal processor or controller. Comparison of the power level feedback signal to a target value may occur to generate an amplifier control signal. The amplifier control signal controls the gain, applied by an amplifier, to the outgoing signal. During operation, the system monitors for a change in the mode of operation and upon responsive to a change, generates a switch control signal to reconfigure the detector configuration to match the new mode of operation.
Abstract:
개시된 무선 통신 시스템은 주파수 호핑(hopping)이 수행되는 채널을 포함하는 복수의 채널 중 하나의 채널을 통하여 수신된 신호를 증폭하도록 구성되는 증폭기; 수신된 신호의 신호 세기를 측정하도록 구성되는 신호 세기 측정 회로; 및 신호 세기 측정 회로에 의해 측정된 신호 세기에 기초하여 증폭기에 대한 이득을 산출하도록 구성되는 이득값 산출부를 포함한다. 이득값 산출부는 이득값을 산출하기 위하여 함수의 계수로서 각 채널 고유의 값을 이용하도록 구성된다.
Abstract:
개시된 무선 통신 시스템은 주파수 호핑(hopping)이 수행되는 채널을 포함하는 복수의 채널 중 하나의 채널을 통하여 수신된 신호를 증폭하도록 구성되는 증폭기; 수신된 신호의 신호 세기를 측정하도록 구성되는 신호 세기 측정 회로; 및 신호 세기 측정 회로에 의해 측정된 신호 세기에 기초하여 증폭기에 대한 이득을 산출하도록 구성되는 이득값 산출부를 포함한다. 이득값 산출부는 이득값을 산출하기 위하여 함수의 계수로서 각 채널 고유의 값을 이용하도록 구성된다.
Abstract:
A method for controlling a receiving signal power of a ultra wide band transmission system is provided to mount a PGC in a front end of a VGA, and to compensate a power difference in accordance with frequency bands of received signals by the PGC, thereby providing a faster initial convergence by simplifying a VGA operation. In a ultra wide band transmission system, a receiving unit is comprised of an antenna(600), a pre-select filter(610), an LNA(Low Noise Amplifier)(620), modulators(630,631), LPFs(Low Pass Filter)(640,641), VGAs(660,661), ADCs(Analog/Digital Converters)(670,671), a timing recovery/demodulator(680), and PGCs(650,651). The modulators(630,631) detect frequency bands used by a transmission unit in the ultra wide band transmission system. The PGCs(650,651) decide a power gain value of an intensity difference of receiving signals according to multi frequency bands, and compensate the power gain value.
Abstract:
A method for enabling a power amplifier to support multiple powers includes: calculating a transmit power according to RF parameters delivered by a baseband board, determining a power amplifier voltage according to the transmit power and a corresponding relationship between the transmit power and the power amplifier voltage, and adjusting a supply voltage of the power amplifier according to the determined power amplifier voltage so as to adjust an output power of the power amplifier. An RF module includes a conversion module that converts a baseband board signal into an RF signal, an antenna linear device, a storage module, a power amplifier module, an adjustable power module, and a power control module. A test method is employed to determine the relationship between a transmit power and a power amplifier voltage.
Abstract:
A method for enabling a power amplifier to support multiple powers includes: calculating a transmit power according to RF parameters delivered by a baseband board, determining a power amplifier voltage according to the transmit power and a corresponding relationship between the transmit power and the power amplifier voltage, and adjusting a supply voltage of the power amplifier according to the determined power amplifier voltage so as to adjust an output power of the power amplifier. An RF module includes a conversion module that converts a baseband board signal into an RF signal, an antenna linear device, a storage module, a power amplifier module, an adjustable power module, and a power control module. A test method is employed to determine the relationship between a transmit power and a power amplifier voltage.
Abstract:
A method for enabling a power amplifier to support multiple powers includes: calculating a transmit power according to RF parameters delivered by a baseband board, determining a power amplifier voltage according to the transmit power and a corresponding relationship between the transmit power and the power amplifier voltage, and adjusting a supply voltage of the power amplifier according to the determined power amplifier voltage so as to adjust an output power of the power amplifier. An RF module includes a conversion module that converts a baseband board signal into an RF signal, an antenna linear device, a storage module, a power amplifier module, an adjustable power module, and a power control module. A test method is employed to determine the relationship between a transmit power and a power amplifier voltage.