"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 10, 2018

contents of issue      DOI  10.30898/1684-1719.2018.10.16     full text in Russian (pdf)  

Features of weight processing of discrete signals in the time domain


A. V. Shcherbakov 1, V. S. Shcherbakov 2

 1 LLC «NPP «PRIMA», Svobody Str., Nizhny Novgorod 603950, Russia

2 JSC «NPO «Pravdinsky Radiozavod», Gorkogo Str. 34, Balakhna, Nizhny Novgorod region 606408, Russia


The paper is received on October 17, 2018


Abstract. Active radar uses pulsed probing signals whose power and spectral characteristics determine the main parameters of the radar station. These primarily include the detection range, resolution and detection of weak signals against the background of powerful ones. The power of the emitted signals increased to achieve these goals, but this obtained by increasing their duration and bandwidth due to technical limitations in amplitude and secrecy requirements. Therefore, as probe pulses, signals with linear frequency modulation (LFM) are used, the deviation of which determines the resolution. The multiplication of the band by the duration is called the base for pulsed signals and its numerical value, as well as the sampling frequency, defines the hardware and software implementation of the digital compression filter in the receiver, since they determine the number of arithmetic operations in the algorithm of the matched filter. Therefore, it is necessary to increase it within reasonable limits by no more than 1.5 ... 2 times, since further increase in the sampling rate is not effective due to the decreasing spectrum of the LFM signal. In addition, weighting performed while compressing chirp signals, which can be implemented both in the time and in the frequency domain. It is most appropriate to implement it in the time domain from the point of hardware implementation, as well as the ability to use it in a channel with correlation-filter processing. So, the peculiarities of weight processing in the time domain of discrete, compressed chirp signals are considered, the sampling frequency of which exceeds the signal frequency deviation. The conditions determined for the formation of coefficients of the weight filter for the block diagram under consideration. The estimation of computational efficiency and the simulation results presented.

Keywords: radio-location, weight processing, side lobes, sampling rate, Hamming weighting function.


1. Modern Radar (Analysis, Evaluation, and System Design). Edited by Raymond S. Berkowitz. The Moore School of Electrical Engineering University of Pennsilvania. John Wiley and Sons, Inc. New York, London, Sydney.

2. Charles E. Cook and Marvin Bernfeld. Radar Signals. An introduction to theory and application. Advanced radar studies department Sperry Gyroscope company. Great Neck, Long Island, New York. 1967. ACADEMIC PRESS New York • London.

3. G.Z. Axelrod, K.A. Yelagin. Application of a signal with nonlinear frequency modulation to reduce detection loss. Journal of the Russian Universities: Radioelectronics. 2015. Vol. 2 (In Russian).

4. Lawrence R. Rabiner, Bernard Gold. Theory and Application of Digital signal processing. Prentice-hall, Inc. Englwood Clifs, New Jersey, 1975.

5. V.S. Sherbakov. Methods and conditions for the conversion of the compression filter linear frequency modulated signals of the recursive mind. Zhurnal radioelektroniki - Journal of Radio Electronics [online journal]. 2017. No. 12. Available at: http://jre.cplire.ru/jre/dec17/3/text.pdf. (In Russian).

6. Trukhachev A.A. Radiolokatsionnye signaly I ikh primeneniya [Radar signals and their applications]. Moscow, Voenizdat Publ, 2005, 320 p . (In Russian).

7. Shirman Ya.D., editor. Teoreticheskie osnovy radiolokatsii [Theoretical basis of radar. Tutorial for high schools].  Moscow, Sov. Radio Publ., 1970, 560 p. (In Russian).

8. Lyozin Yu.S. Vvedenie v teoriyu I tekhniku radiotekhnicheskikh system. Uchebnoe posobie dlya VUZov [Introduction to the theory and technology of radio engineering systems: Proc. manual for universities]. Moscow, Radio I Svyaz Publ, 1986,  280 p. (In Russian).


For citation:

A. V. Shcherbakov, V. S. Shcherbakov. Features of weight processing of discrete signals in the time domain. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2018. No. 10. Available at http://jre.cplire.ru/jre/oct18/16/text.pdf
DOI  10.30898/1684-1719.2018.10.16