RU2012139430A - METHOD FOR DETERMINING THE OPERATING PARAMETERS OF THE DIGITAL COMMUNICATION SYSTEM AND THE DEVICE FOR ITS IMPLEMENTATION - Google Patents

Abstract

1. A method for determining the operating parameters of a digital communication system, which consists in the fact that in the range of 20 KHz-20 GHz a highly stable oscillation frequency is selected, the reference and adjustable signals, after which the spectral amplitudes of the reference signal are determined, an additional signal is generated from the reference and adjustable signals, low-pass filtering of the additional signal, by which the tunable signal is corrected, and by the ratio of which and the amplitudes of the spectrum of the reference signal, the operating parameters are determined, characterized in that at least two amplitudes of the spectrum of the tuned signal corrected after passing through low-pass filtering are determined, two additional signals are generated from the amplitudes of the corrected signal and from the amplitudes of the reference signal, from which additional amplitudes are determined, and from them the operating parameters are determined from the relation, where,, ,,, are additional amplitudes, M is the number of harmonics amplitudes of the tuned and reference signals. 2. A device for determining the operating parameters of digital communication systems, containing a reference oscillator of a highly stable frequency oscillation, a phase detector, a DC amplifier, a low-pass filter, connected to the control input of an adjustable oscillator in series, a spectrum analyzer installed between the reference oscillator and the phase detector, and between the tunable generator and the phase detector, a spectrum analyzer is installed, to the inputs of the phase characteristic determination unit the outputs of each spectrum analyzer are connected to the output of the detection unit

Claims (4)

1. A method for determining the operating parameters of a digital communication system, which consists in the fact that in the range of 20 KHz-20 GHz a highly stable oscillation frequency is selected, the reference and adjustable signals, after which the spectral amplitudes of the reference signal are determined, an additional signal is generated from the reference and adjustable signals, low-pass filtering of the additional signal, by which the tunable signal is corrected, and by the ratio of which and the amplitudes of the spectrum of the reference signal, the operating parameters are determined, characterized in that at least two amplitudes of the spectrum of the tuned signal corrected after passing through low-pass filtering are determined, two additional signals are generated from the amplitudes of the corrected signal and from the amplitudes of the reference signal, from which additional amplitudes are determined, and from them the operating parameters are determined from the relation $$\varphi \left(\theta \right)=\frac{A_0^{\mathrm{one}}{A}_0^2}{\mathrm{four}}+\frac{\mathrm{one}}{2}{\displaystyle \sum _{l=\mathrm{one}}^M\left(\left(A_l^{\mathrm{one}}{A}_l^2+B_l^{\mathrm{one}}{B}_l^2\right)\cos \left(l\theta \right)+\left(A_l^{\mathrm{one}}{B}_l^2-B_l^2{A}_l^2\right)\sin \left(l\theta \right)\right)}$$

, Where $$A_0^{\mathrm{one}}$$

, $$A_l^{\mathrm{one}}$$

, $$B_{{}_l}^{\mathrm{one}}$$

, $$A_0^2$$

, $$A_l^2$$

, $$B_{{}_l}^2$$

- additional amplitudes, M is the number of amplitudes of harmonics of the tuned and reference signals. 2. A device for determining the operating parameters of digital communication systems, containing a reference oscillator of a highly stable oscillation frequency, a phase detector, a DC amplifier, a low-pass filter connected in series to the control input of an adjustable oscillator, an analyzer is installed between the reference generator and the phase detector spectrum, and between the tunable generator and the phase detector a spectrum analyzer is installed, to the inputs of the phase characteristic the outputs of each spectrum analyzer are connected to the detector, a recorder is connected to the output of the phase detector characteristic determination unit, which records the operating parameters of the investigated phase locked loop of the oscillator frequency, characterized in that the tunable oscillator with high frequency stability oscillation has two coherent outputs, between the tunable generator and the phase detector a multiplier is introduced, one of the inputs of which is connected to the first output of the adjustable generator, the second is connected it is connected to the output of the reference generator, and the output is connected to the input of the phase detector, an additional multiplier is introduced into the circuit, one input of which is connected to the second output of the adjustable generator, the second input is connected to the output of the reference generator, and the output is connected to the input of the phase detector. 3. The device according to claim 2, characterized in that between the spectrum analyzer and the reference generator an additional multiplier is installed, the inputs of which are connected to the output of the reference generator, and the output is connected to the input of the spectrum analyzer. 4. The device according to claim 3, characterized in that between the spectrum analyzer and the tunable generator an additional multiplier is installed, the first input of which is connected to the first output of the tunable generator, the second input of which is connected to the second output of the tunable generator, and the output is connected to the input of the spectrum analyzer.