METHOD OF OBTAINING SIGNALS FOR SPECTRAL ANALYSIS Russian patent published in 2009 - IPC G01R23/16 

FIELD: radio engineering.

SUBSTANCE: present invention relates to the field of radio engineering and can be used in spectrum analysers and detecting devices for deterministic signals using matched filtration of the latter. The method of obtaining signals for spectral analysis, particularly the determined periodic sequence of radio-frequency pulses with varying carrier frequency, based on spectrum conversion of the received signal by increasing the duration of the latter, mixing the obtained signal with the linear-frequency-modulated oscillations of heterodyning and subsequent spectrum-temporary compression in a dispersive delay line. Increase of the duration of the received signal is carried out with the help of a tapped delay line with equidistantly distributed outlets, outlet responses with which they summarize, and the delay between the adjacent output of the tapped delay line are selected in a multiple relation to the reciprocal value of frequencies carrying oscillation of radio-frequency pulses. Total signal delay in tapped delay lines is assigned less tracking period of the radio-frequency pulse sequence, for example by an order. On the temporary situation of compressed pulses relative to the actuating pulses of the clock-pulse generator the analysed radio-frequency pulses are coded as logical one or zero, delay time of linear-frequency-modulated oscillations of heterodyning is adjusted till the signal-noise ratio at the inlet of the threshold device, which is determined by the maximum compressed pulse amplitude, is obtained.

EFFECT: simplification of the process of increasing the duration of the received radio-frequency pulses while maintaining their coherence.

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