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Article title EVALUATION OF THE SIDELOBE SUPPRESSION FILTER EFFECTIVENESS IN THE CONDITION OF THE BARKER SIGNALS MATCHED FILTERING
Authors E. E. Zavtur, I. I. Markovich, A. I. Panychev
Section SECTION III. MATHEMATICAL AND SOFTWARE
Month, Year 08, 2018 @en
Index UDC 621.396
DOI 10.23683/2311-3103-2018-8-163-173
Abstract The aim of the study is the synthesis of an additional filter for suppressing side lobes, providing the best compromise between the SNR decreasing and reduction of the sidelobe level at the filter output, consistent with the signals based on the Barker codes. To achieve this goal, it is necessary to find the coefficients of the filter for sidelobe suppression and evaluate its effectiveness. The digital sidelobe suppression filter is synthesized on the basis of solving the optimization problem of searching the relative value conditional maximum in the main lobe of the output signal in a non-optimal filter under the condition of limiting the value of its sidelobes. Sidelobe suppression filters are investigated for matched filtering of signals formed on the basis of Barker sequences of different lengths. In all cases, the minimum possible length of the side lobes suppression filter pulse characteristic has been chosen, which is equal to the number of reports in the matched filter output. Quantitative estimates of the side lobes suppression and the accompanying SNR decreasing at the output of the synthesized filter for signals based on different Barker codes are obtained. It is established that the maximum suppression of sidelobe is achieved in the case of 5-element (11.65 dB) and 13-element (11.7 dB) Barker codes. The value of the side lobes in the output signal are minus 25,63 dB and minus 33,98 dB respectively. The minimum loss in SNR is obtained for signals based on 11-element (1.56 dB) and 13-element (0.73 dB) Barker codes. For a signal with a 5-element Barker code, this value is 1.75 dB. Thus, for 13-element Barker code signals the optimal ratio between the degree of sidelobe suppression and SNR decreasing in the processing of the matched filter output by an additional non matched filter is achieved. In cases where significant restrictions are imposed on the duration of the output signal, the use of a 5-element Barker code is preferred.

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Keywords Radar; matched filter; Barker code; side lobe suppression.
References 1. Radiolokatsionnye sistemy mnogofunktsional'nykh samoletov. T. 1. RLS – informatsionnaya osnova boevykh deystviy mnogofunktsional'nykh samoletov. Sistemy i algoritmy pervichnoy obrabotki radiolokatsionnykh signalov [Radar systems of multifunctional aircraft. Vol.1. Radar-the information basis of the fighting multifunctional aircraft. Systems and algorithms for primary processing of radar signals], ed. byA.I. Kanashchenkova, V.I. Merkulova. Moscow: Radiotekhnika, 2006, 656 p.
2. Dudnik P.I., Kondratenkov G.S., Tatarskiy B.G., Il'chuk A.R., Gerasimov A.A. Aviatsionnye radiolokatsionnye kompleksy i sistemy: uchebnik dlya slushateley i kursantov VUZov VVS [Aviation radar systems and systems: textbook for students and cadets of air force Universities], ed. byP.I. Dudnika. Moscow: Izd-vo VVIA im. prof. N.E. Zhukovskogo, 2006, 1112 p.
3. Enrique Garcia, José A. Paredes, Fernando J. Álvarez. Spreading sequences in active sensing, Signal Processing, 2015, Vol. 106, pp. 88-105.
4. Carroll J. Nunn, Gregory E. Coxson. Best-Known Autocorrelation Peak Sidelobe Levels for Binary Codes of Length 71 to 105, International Workshop on Coding and Cryptography. 2013. April 15–19.
5. Matthew A. Ferrara, Near-Optimal Peak Sidelobe Binary Codes, IEEE Department of Mathematical Sciences Rensselaer Polytechnic Institute Troy, New York 12180. 2006, pp. 400-403.
6. Leukhin A.N., Potehin E.N. Binary Sequences with Minimum Peak Side-lobe Level up to Length 68, International Workshop on Coding and Cryptography. 2013. April 15–19.
7. NagaJyothi A., Raja Rajeswari K. Cross-correlation of Barker code and Long binary signals // International Journal of Engineering Science and Technology (IJEST). – 2011. – Vol. 3.
8. Li, Lihua, Coon, Michael, McLinden, Matthew, Radar Range Sidelobe Reduction Using Adaptive Pulse Compression Technique, NASA Tech Briefs. 2013. October.
9. Kravchenkov D.N. Metody povysheniya razreshayushchey sposobnosti po dal'nosti vertoletnoy RLS [Methods of increasing the resolution of the range of the helicopter radar], Radiolokatsionnye sistemy spetsial'nogo i grazhdanskogo naznacheniya. 2010–2012 [Radar systems for special and civil purposes. 2010-2012], ed. by Yu.I. Belogo. Moscow: Radiotekhnika, 2011, pp. 395-402.
10. Jaber Ismail M. Sidelobe-Suppression Technique Applied To Binary Phase Barker Codes, Journal of Engineering and Development, Vol. 16, No. 4, pp. 330-336.
11. Kiranmai B., Rajesh Kumar P. Performance Evaluation of Barker Codes using New Pulse Compression Technique, International Journal of Computer Applications, Vol. 107, No. 20, pp. 24-27.
12. Nuthalapati R.M. Design of mismatched filters for long binary codes, RadarCon 2008 May 26–30, 2008, Rome Italy. 2008 IEEE Proc., pp. 54-59.
13. Babur G.P., KHlusov V.A. Podavlenie bokovykh lepestkov otklika soglasovannogo matrichnogo fil'tra RLS, proizvodyashchey «monoimpul'snuyu» sovmestnuyu otsenku koordinat i matritsy rasseyaniya ob"ektov [Suppression of lateral lobes of the response of the coordinated matrix radar filter, producing a "monopulse" joint assessment of the coordinates and scattering matrix of objects], Nauchnyy vestnik MGTU GA. Ser. Radiofizika i radiotekhnika [Scientific Bulletin of MSTU GA. Series: radio Physics and radio engineering], 2005, No. 93, pp. 131-140.
14. Mal'tsev G.N., Sakulin E.A. Uskorennyy poisk shirokopolosnykh fazomanipulirovannykh signalov po zaderzhke s ispol'zovaniem fil'tra podavleniya bokovykh lepestkov avtokorrelyatsionnoy funktsii [Accelerated search for wideband phase-manipulated signals by delay using the side lobe suppression filter of the autocorrelation function], Sverkhshirokopolosnye signaly v radiolokatsii, svyazi i akustike: Materialy IV Vserossiyskoy nauchnoy konferentsii [Ultra-wideband signals in radar, communication and acoustics: Proceedings of the IV all-Russian scientific conference], 2013, pp. 114-118.
15. Kompaniets Yu.I., Krivchenkov D.N. Sposob podavleniya bokovykh lepestkov avtokorrelyatsionnoy funktsii shirokopolosnogo signala [A method of suppressing side lobes of the autocorrelation function of the wideband signal]. Patent 2335782 RF, MPK G01S 7/36; the applicant and the patent holder of the Ryazan state instrument plant. No. 2007106099/09; declared 20.02.2007; published 10.10.2008. Bul. 28, 11 p.
16. Krivchenkov D.N., Kompaniets YU.I., Kostromichev V.D., Vakareva Z.I. Sposob podavleniya bokovykh lepestkov avtokorrelyatsionnoy funktsii shirokopolosnogo signala [A method of suppressing side lobes of the autocorrelation function of the wideband signal]. Patent 2 503 971 RF, MPK G01S 7/36; the applicant and the patent holder of the Ryazan state instrument plant. No. 2012123183/07, declared 05.06.2012; published 10.01.2014. Bul. No. 1, 10 p.
17. Kalenichenko S.P., Sokol'nikov V.A. Obrabotka radiolokatsionnykh signalov v tsifrovykh fil'trakh s podavleniem bokovykh lepestkov funktsii otklika [Processing of radar signals in digital filters with side lobe suppression], Izvestiya vuzov Rossii. Radioelektronika [News of Russian universities. Radionics], 2009, Issue 2, pp. 69-75.
18. Kalenichenko S.P., Sokol'nikov V.A. Fil'tr podavleniya bokovykh lepestkov slozhnogo radiolokatsionnogo signala [The filter of suppression of lateral petals of a complex radar signal]. Utility model to patent 110502 RF, MPK G01S 7/292; applicant and patent holder Saint-Petersburg state electrotechnical University "LETI". V.I. Ulyanov (Lenin). No. 2011113797/07; declared 08.04.2011; published 20.11.2011. Bul. No. 32, 13 p.
19. Yılmaz KAYA, Murat UYAR, Ramazan TEKDN. A Novel Crossover Operator for Genetic Algorithms: Ring Crossover, Computing Research Repository Journal, 2011, Vol. abs/1105.0.
20. Abuiziah I., Shakarneh N., A Review of Genetic Algorithm Optimization: Operations and Applications to Water Pipeline Systems, International Journal of Mathematical, Computational, Physical and Quantum Engineering, 2013, Vol. 7, No. 12, pp. 1262-1268.
21. Hesam G., Mohammad M.P., Optimization of Matched and Mismatched Filters in Short Range Pulse Radars using Genetic Algorithm, International Journal Image. Graphic and Signal processing (IJIGSP), 2016, Vol. 8, No. 5.
22. Amiantov I.N. Izbrannye voprosy statisticheskoy teorii svyazi [Selected questions of statistical theory of communication]. Moscow: Sov. radio, 1971, 416 p.

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