"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 3, 2019

contents of issue      DOI  10.30898/1684-1719.2019.3.15     full text in Russian (pdf)  

UDC 623.62

The method of determining the mutual time delay of radar signals with continuous frequency-modulated radiation at the points of reception of the difference-ranging system


I. F. Kupryashkin, A. V. Evlakov

Military educational and scientific centre of Military-air forces «Military-air academy
named by prof. N.E.Zhukovsky and Ju.A.Gagarin», Voronezh
394052, Russia


The paper s received on January 26, 2019, after correction – on March 25, 2019


Abstract. The paper proposes a method for determination of mutual time delay of signals in the radar with continuous linear frequency modulated radiation in a differential ranging measuring system. The method is based on transmission of received signals, converting to digital form with small number of quantization levels, from reception points to a processing point. The peculiarity of the method is pre-filtering of the received signal in the frequency band of a width not exceeding 10 percent of the total width of the signal spectrum. This ensures its conversion from continuous form to pulse, and also reduces the bandwidth requirements of data channels at ten times and more. Another peculiarity of the method is the use of properties of linear frequency modulation signals in the evaluation of their mutual time shift. It is to replace the procedure for calculating their mutual correlation function with a significantly more productive combination of their multiplication procedure with the fast Fourier transform followed. It is shown that even if the signal-to-noise ratio is less than minus 10 decibels, the two quantization levels and the transmission of only a part of the frequency band (less than 3%), the mean square error of the radar carrier location is not more than a few tens of meters.

Keywords: different-distance method, electronic intelligence, determination of location.


1. Zaugg E.C., Edwards M.C., Margulis A. The SlimSAR: A Small, Multi-Frequency, Synthetic Aperture Radar for UAS Operation. 9th IEEE International Radar Conference, 2010. P. 277-282.

2. Duersch M.I. BYU MICRO-SAR: A Very Small, Low-Power LFM-CW SAR. A thesis submitted to the faculty of Brigham Young University in partial fulfillment of the requirements for the degree of Master of Science, 2004.

3. Zaugg E.C. Theory and Application of Motion Compensation for LFM-CW SAR. IEEE Transactions On Geoscience And Remote Sensing, 2008, Vol. 46, No. 10, PP. 2990-2998.

4. Bogomolov A.V., Kupryashkin I.F., Likhachev V.P., Ryazantsev L.B. Compact dual-band SAR for unmanned aircraft complex. Proceedings of XXIX All-Russian Symposium "Radiolokatsoinnoe issledovanie prirodnykh sred" [Radar research of natural environments"]. Sankt-Petersburg, Mozhaisky Military Academy, 2015, Issie 11, PP. 235-240 (In Russian)
5. Veselkov A.A., Likhachev V.P., Semenov V.V. Difference-ranging method for determining the location of radar stations with linear-frequency-modulated signals of spatially separated autocorrelation receivers. Vestnik voenno-vozdushnoy akademii - Bulletin of Bulletin of the Air Force Academy, 2017, N0. 3(30), PP192-198 (In Russian)
6.  Smirnov Yu.A. Radiotekhnicheskaya razvedka [Radio Intelligence]. Moscow, Voenizdat Publ., 2001, 456 p. (In Russian)

7. Kupryashkin I.F., Likhachev V.P., Ryazantsev L.B. Methodology to substantiate the requirements for analog-digital conversion in radar with a synthesized continuous aperture radiation. Tsifrovaya obrabotka signalov - Digital signal processing, 2017, No. 2, PP. 49-52 (In Russian)
8. Saibel A.G. Osnovy teorii tochnosti radiotekhnicheskikh metodov mestoopredeleniya: uchebnoye posobiye  [Fundamentals of the theory of accuracy of radio-technical methods of positioning: a manual.]. Ěoscow, Gosoboronizdat, 1958, 54 p. (In Russian)


For citation:
I. F. Kupryashkin, A. V. Evlakov. The method of determining the mutual time delay of radar signals with continuous frequency-modulated radiation at the points of reception of the difference-ranging system. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2019. No. 3. Available at http://jre.cplire.ru/jre/mar19/15/text.pdf