RU95122672A - METHOD FOR AUTOMATIC ADJUSTMENT OF AMPLIFICATION AND EXCLUSION OF DISPLACEMENT OF THE CONSTANT COMPONENT IN THE RECEIVER WITH SQUARE DEMODULATION AND THE DEVICE FOR ITS IMPLEMENTATION - Google Patents

METHOD FOR AUTOMATIC ADJUSTMENT OF AMPLIFICATION AND EXCLUSION OF DISPLACEMENT OF THE CONSTANT COMPONENT IN THE RECEIVER WITH SQUARE DEMODULATION AND THE DEVICE FOR ITS IMPLEMENTATION

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Publication number
RU95122672A
RU95122672A RU95122672/09A RU95122672A RU95122672A RU 95122672 A RU95122672 A RU 95122672A RU 95122672/09 A RU95122672/09 A RU 95122672/09A RU 95122672 A RU95122672 A RU 95122672A RU 95122672 A RU95122672 A RU 95122672A
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Russia
Prior art keywords
signal
gain control
frequency
modulating
output
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RU95122672/09A
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Russian (ru)
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RU2156538C2 (en
Inventor
Б.Вилсон Натаниэль
Дж.Блэк Питер
И.Питерзелл Пол
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Квэлкомм Инкорпорейтед
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Publication of RU95122672A publication Critical patent/RU95122672A/en
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Publication of RU2156538C2 publication Critical patent/RU2156538C2/en

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Claims (10)

1. Устройство автоматической регулировки усиления, включающее усилитель с регулируемым коэффициентом усиления, имеющий входной порт для приема входного сигнала, порт управления для приема сигнала регулировки усиления и выходной порт для выдачи выходного сигнала, отличающееся тем, что содержит понижающий преобразователь, соединенный с выходным портом для преобразования с понижением частоты выходного сигнала в модулирующую частоту с получением модулирующего сигнала, служащий для преобразования частоты несущей выходного сигнала в модулирующую частоту, смещенную на заданную величину от постоянной составляющей, контур подавления сигналов прохождения постоянной составляющей, предназначенный для приема модулирующего сигнала, для подавления сигналов прохождения постоянной составляющей, генерируемых понижающим преобразователем частоты, и для выдачи скомпенсированного модулирующего сигнала, средство генерирования принятого сигнала мощности, основанного на мощности скомпенсированного модулирующего сигнала, и насыщающий интегратор для сравнения принятого сигнала мощности с опорным сигналом и для генерирования сигнала ошибки в ответ на результат сравнения, включающий средство получения сигнала регулировки усиления путем избирательного интегрирования сигнала ошибки на основании величин сигналов ошибки и регулировки усиления.1. The device is an automatic gain control, including an amplifier with adjustable gain, having an input port for receiving an input signal, a control port for receiving a gain control signal and an output port for outputting an output signal, characterized in that it contains a buck converter connected to the output port for conversion with decreasing the frequency of the output signal to a modulating frequency to obtain a modulating signal, which is used to convert the frequency of the carrier of the output signal to mode a dimming frequency offset by a predetermined amount from the dc component, a dc signal suppression circuit designed to receive a modulating signal, to suppress a dc signal passing signals generated by a buck converter, and to provide a compensated modulating signal, means for generating a received power signal based at the power of the compensated modulating signal, and a saturating integrator to compare the received signal m sensitivity with a reference signal and for generating an error signal in response to a comparison result, including means for obtaining a gain control signal by selectively integrating an error signal based on the values of the error signals and gain control. 2. Устройство автоматической регулировки усиления по п.1, отличающееся тем, что контур подавления сигналов прохождения постоянной составляющей дополнительно включает вычитатель, имеющий первый вход для приема модулирующего сигнала и выходной порт, связанный с входом фильтра нижних частот, и интегратор, имеющий входной порт, связанный с выходным портом фильтра нижних частот, и выходной порт, связанный с вторым входом блока вычитания. 2. The automatic gain control device according to claim 1, characterized in that the DC signal suppression circuit further includes a subtractor having a first input for receiving a modulating signal and an output port connected to an input of a low-pass filter, and an integrator having an input port, connected to the output port of the low-pass filter, and an output port connected to the second input of the subtraction unit. 3. Устройство автоматической регулировки усиления по п.2, отличающееся тем, что контур подавления сигналов прохождения постоянной составляющей дополнительно включает аналого-цифровой преобразователь, соединенный с выходным портом фильтра нижних частот, и цифро-аналоговый преобразователь, расположенный между выходным портом интегратора и вторым входом блока вычитания. 3. The automatic gain control device according to claim 2, characterized in that the DC signal suppression circuit further includes an analog-to-digital converter connected to the output port of the low-pass filter and a digital-to-analog converter located between the output port of the integrator and the second input block subtraction. 4. Устройство автоматической регулировки усиления по п.2, отличающееся тем, что контур подавления сигналов прохождения постоянной составляющей дополнительно включает фильтр верхних частот, расположенный между выходным портом фильтра нижних частот и входным портом интегратора. 4. The automatic gain control device according to claim 2, characterized in that the DC signal suppression circuit further includes a high-pass filter located between the output port of the low-pass filter and the input port of the integrator. 5. Устройство автоматической регулировки усиления по п.1, отличающееся тем, что насыщающий интегратор включает первое средство избирательного интегрирования сигнала ошибки только в случае, когда амплитуда сигнала регулировки усиления меньше первой заданной пороговой величины, и второе средство избирательного интегрирования сигнала ошибки только в случае, когда амплитуда сигнала регулировки усиления больше второй заданной пороговой величины. 5. The automatic gain control device according to claim 1, characterized in that the saturating integrator includes the first means for selectively integrating the error signal only when the amplitude of the gain control signal is less than the first predetermined threshold value, and the second means for selectively integrating the error signal only in case when the amplitude of the gain control signal is greater than a second predetermined threshold value. 6. Устройство автоматической регулировки усиления по п.1, отличающееся тем, что понижающий преобразователь включает смеситель, имеющий первый входной порт для приема выходного сигнала, и гетеродин, соединенный с вторым входным портом смесителя, причем частота гетеродина выбрана такой, что средняя частота выходного сигнала преобразуется в модулирующую частоту, смещенную на заданную величину от частоты постоянной составляющей модулирующего сигнала. 6. The automatic gain control device according to claim 1, characterized in that the step-down converter includes a mixer having a first input port for receiving an output signal, and a local oscillator connected to the second input port of the mixer, and the local oscillator frequency is chosen such that the average frequency of the output signal is converted to a modulating frequency, offset by a predetermined amount from the frequency of the constant component of the modulating signal. 7. Устройство автоматической регулировки усиления по п.6, отличающееся тем, что понижающий преобразователь включает схему модулятора смещения для изменения частоты схемы гетеродина так, чтобы изменять заданную величину, на которую отклоняется средняя частота выходного сигнала при преобразовании относительно частоты постоянной составляющей модулирующего сигнала. 7. The automatic gain control device according to claim 6, characterized in that the step-down converter includes an offset modulator circuit for changing the frequency of the local oscillator circuit so as to change a predetermined amount by which the average frequency of the output signal deviates from the conversion relative to the frequency of the constant component of the modulating signal. 8. Устройство автоматической регулировки усиления по п.7, отличающееся тем, что понижающий преобразователь включает смеситель, соединенный с выходным портом усилителя с регулируемым коэффициентом усиления и предназначенный для преобразования выходного сигнала с понижением частоты на I- и Q-составляющие модулирующего сигнала. 8. The automatic gain control device according to claim 7, characterized in that the step-down converter includes a mixer connected to the output port of the amplifier with an adjustable gain and designed to convert the output signal with decreasing frequency into I- and Q-components of the modulating signal. 9. Устройство автоматической регулировки усиления по п.8, отличающееся тем, что контур подавления сигналов прохождения постоянной составляющей включает в себя первый и второй низкочастотные фильтры составляющих модулирующего сигнала I- и Q-каналов, соответственно. 9. The automatic gain control device of claim 8, wherein the damping circuit of the DC signal includes the first and second low-pass filters of the components of the modulating signal of I- and Q-channels, respectively. 10. Способ автоматической регулировки усиления с использованием усилителя с регулируемым коэффициентом усиления, имеющего входной порт для приема входного сигнала, порт управления для приема сигнала регулировки усиления и выходной порт для выдачи выходного сигнала, отличающийся тем, что преобразуют частоту выходного сигнала в модулирующую частоту с получением модулирующего сигнала, причем частота несущей выходного сигнала преобразуется в модулирующую частоту, смещенную на заданную величину от постоянной составляющей, подавляют проходящие сигналы постоянной составляющей, сопровождающие модулирующий сигнал, для выработки скомпенсированного модулирующего сигнала, генерируют принятый сигнал мощности на основании мощности скомпенсированного модулирующего сигнала и избирательно интегрируют разность принятого мощного сигнала и эталонного сигнала на основании величин сигналов ошибки и регулировки усиления. 10. A method of automatic gain control using an adjustable gain amplifier having an input port for receiving an input signal, a control port for receiving a gain control signal and an output port for outputting an output signal, characterized in that the output frequency is converted to a modulating frequency to obtain modulating signal, and the carrier frequency of the output signal is converted to a modulating frequency offset by a predetermined amount from the DC component, suppress the pass The DC component signals accompanying the modulating signal to generate a compensated modulating signal generate a received power signal based on the power of the compensated modulating signal and selectively integrate the difference between the received powerful signal and the reference signal based on the values of the error signals and gain control.
RU95122672/09A 1994-04-28 1995-04-28 Method and device for automatic regulation of amplification and elimination of constant drift in quadrature modulation receiver RU2156538C2 (en)

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US23581294A 1994-04-28 1994-04-28
US235,812 1994-04-28

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RU95122672/09A RU2156538C2 (en) 1994-04-28 1995-04-28 Method and device for automatic regulation of amplification and elimination of constant drift in quadrature modulation receiver

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EP (1) EP0706730B1 (en)
JP (1) JP3021662B2 (en)
KR (1) KR100329673B1 (en)
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