SU1370623A1 - Device for measuring noise signal intensity - Google Patents

Abstract

The invention can be used as part of a compensation radiometer for radio astronomy and other measurements of the power of noise signals against irregular impulse noise. The device contains an envelope detector 1, integrators 2 and 4, a recording unit 3 and an attenuator 5. Introduction of adders 6 and 8, detector 7 and the formation of new functional connections improve the accuracy of measuring the power of a continuous signal and extend the functionality of the device by measuring the intensity of irregular impulse noise, 1 Il. i and

Description

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The invention relates to a radio measuring technique and can be used, in particular, as part of a compensation radiometer for radio astronomy and other precision radiometric measurements of the power of noise signals against irregular impulse noise while simultaneously measuring their average power.

The purpose of the invention is to increase the accuracy of measuring the intensity of a continuous signal against a background of impulse noise of long duration and expand the functionality of the device by measuring the intensity of irregular impulse noise.

The drawing shows the block diagram of the device.

The device comprises an envelope detector 1, a first integrator 2, a registration unit 3, a second integrator 4, an attenuator 5, a first adder 6, an additional detector 7 and a second adder 8.

In this case, the input of the device is the input of the envelope detector 1, and the output of the envelope detector 1 is connected to the direct input of the first adder 6 and the input of the first integrator 2, the output of the first adder 6 through an additional detector 7 connected in series and the second integrator 4 is connected to the attenuator 5, the output of the first integrator 2 is connected to the inverted input of the first adder 6 and the direct input of the second adder 8, the inverse input of which is connected to the output of the attenuator 5, the first input of the recording unit 3 is connected to the output of the second ummatora 8, and the second recording unit 3 input connected to the output of the attenuator 5.

The device works as follows.

The output signal of detector 1 envelope contains a constant component proportional to the total average power of the measured noise signal and the pulse noise, as well as a variable component representing the sum of the low frequency fluctuations of the noise signal and pulse noise. The constant component is output by the first integrator 2 and is fed to the inverted input of the first adder 6, to the forward input of which a signal is received from the output of the envelope detector 1. As a result, the output

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The first adder 6 is allocated a variable component of the output signal of the envelope detector. After its second detection, a constant component appears at the output of the additional detector 7, which is proportional to the average power of the impulse noise and small low-frequency fluctuations of the noise signal. This component is separated by the second integrator 4 and through an attenuator 5 is fed to the inverse input of the second adder 8 and the second input of the registration unit 3. The direct input of the second adder 8 is supplied with a voltage from the output of the first integrator 2, proportional to the total average power of the measured signal and the impulse noise. As a result, the voltage at the output of the second adder 8 is proportional to the difference of the constant voltages of the first 2 and second 4 integrators. The coefficient of attenuation of the attenuator 5 is chosen such that when only a pulse signal is applied to the input of the envelope detector, the voltage at the output of the adder 8 is zero. Then, when measuring the intensity of the noise signal, the voltage supplied to the first input of the second adder 8 is proportional to the average power of the measuring noise signal, regardless of the presence or absence of impulse noise. In this case, the voltage supplied to the second input of the recording unit 3 is a constant component proportional to the average power of the impulse noise.

Claims (1)

Invention Formula d., 50 55 A device for measuring the intensity of a sound signal, comprising a registration unit, a serially connected envelope detector and a first integrator, as well as a second integrator and a attenuator, in series, with the aim of improving the accuracy of measuring the intensity of a continuous signal against a background of pulsed noise of long duration and enhancement of functionality by measuring the intensity of irregular impulse noise, the first adder connected in series are inserted into it and olnitelny detector is included between the output of the detector -i1370623 the envelope and the input of the second integrato-direct input of the second combiner, as well as the second adder, is switched on-yen and connected to the output of the first between the output of the attenuator and the per-integrator, and the second input of the unit is the revoking input of the registration unit, with the attenuation input of the first adder of the input device connected to the output.