SU552580A1 - Device for measuring signal parameters - Google Patents

Description

one

The invention relates to radio engineering and can be used in radio engineering systems, for example, in trajectory measurement systems.

A device for measuring signal parameters is known, comprising a series-connected analog-to-digital converter and a digital meter.

This known device does not provide high accuracy measurements.

It is also known a device for measuring signal parameters comprising a generator of an interpolating function connected in series, a modulator of a measured signal parameter, the second input of which is fed to an input signal, an analog-to-digital converter and a digital meter, as well as an averager.

However, this device does not provide high accuracy measurements.

The purpose of the invention is to improve the measurement accuracy.

For this, a device for measuring signal parameters containing a generator of an interpolating function connected in series, a modulator of the signal being measured, to the second input of which an input signal was fed, an analog-to-digital converter and a digital meter, as well as an averager, were additionally introduced

an extrapolator, a subtraction unit and an adder, while the input of a single-step extrapolator and the first input of the subtraction unit are connected to the output of a digital meter, the second input

the subtraction unit and one of the inputs of the adder are connected to the output of the one-step extrapolator, and the output of the subtraction unit is connected to the input of the averager, the output of which is connected to another input of the adder.

The drawing shows a block diagram of the device.

The device for measuring signal parameters contains a series-connected interpolation generator 1, a modulator 2 of the signal being measured, the input of which is fed to an input signal, an analog-to-digital converter 3 and a digital meter 4, as well as averager 5, single-step estranor tor 6, block 7 and

adder 8. The input of the single-step extrapolator 6 and the first input of the subtractor 7 are connected to the output of the digital meter 4, the second input of the subtraction unit 7 and one of the inputs of the adder 8 are connected to the output of the single-step extrapolar 6, and the output of the subtractor 7 is connected to the input of the averager 5 , the output of which is connected to another input of the adder 8. The device operates as follows.

Claims (1)

Modulator 2 modulates the measured parameter X of the input signal S (x, t) according to the law of the interpolating function produced by the generator 1. The output signal of the modulator 2 is digitized by an analog-to-digital converter 3 and sent to the digital meter 4. Each "-th" The measurement cycle of a single-step extractor 6, based on the previous p-1 measurements, calculates the expected value x of the measured parameter x of the next lth measurement, which in subtractor 7 subtracts from the actual measurement. This difference is then fed to averager 5, where the average of all the differences obtained to a given time is calculated, and the result is added in the adder 8 to the expected value of x, forming an estimate of the measured parameter x of the signal S (x, t). Subtracting, in the subtraction unit 7, the extrapolated values of the measured parameter X from the current measurements made by the digital meter 4, eliminates the deterministic component of the dynamics of this parameter at the input of the averager 5, and hence the possibility of distortion by its averaging operation. The specific type of modulator 2 of the measured parameter x of the signal 5 (x, t) is determined by the physical nature of this parameter. For example, if X is the amplitude, frequency, or phase of a signal 5 (x, t), then modulator 2 is an amplitude, frequency, or phase modulator (controlled phase shifter), respectively. An apparatus for measuring signal parameters comprising a generator of an interpolating function connected in series, a modulator of a measured parameter of a signal to the second input of which an input signal is fed, an analog-to-digital converter and a digital meter, as well as an averager, in order to increase accuracy of measurements; one-step extrapolator, subtraction unit, and adder were additionally introduced; the input of the single-step extrapolator and the first input of the subtraction unit are connected to the output The second meter, the second input of the subtraction unit and one of the inputs of the adder are connected to the output of the single-step extrapolator, and the output of the subtractor is connected to the input of the averager, the output of which is connected to another input of the adder.