МЕТОД ПРОТИДІЇ БАГАТОПРОМЕНЕВОСТІ В ТРОПОСФЕРНОМУ ЗВ'ЯЗКУ НА ОСНОВІ ЗАСТОСУВАННЯ СКЛАДЕНИХ СИГНАЛІВ В БАЗИСІ УОЛША

Михайло Ільченко; Сергій Капштик; Теодор Наритник

doi:10.20535/kpisn.2024.1-4.317380

Vol. 137 · Issue 1-4 · 2024 Dec 31, 2024 article

METOD FOR INCREASING THE SPECTRAL EFFICIENCY OF TROPOSCATTER COMMUNICATION BASED ON THE USE OF COMPOSITE SIGNALS IN THE WALSH BASIS

Michael Ilchenko Corresponding Research Institute of Telecommunication Systems of the Igor Sikorsky Kyiv Polytechnic Institute, Ukraine Ukraine

Sergii Kapshtyk National Space Facility Control and Test Center Educational and Research Institute of Telecommunication Systems of the Igor Sikorsky Kyiv Polytechnic Institute, Ukraine Ukraine

Theodor Narytnyk Research Institute of Telecommunication Systems of the Igor Sikorsky Kyiv Polytechnic Institute, Ukraine Ukraine

PublishedDec 31, 2024

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KPISN 1-4 VOL 137 · 1-4

VOL 137 · ISS 1-4 · 2024 View issue

Abstract

Background . In modern telecommunications, troposcatter communication systems organize long-distance communication. These systems allow communication beyond the line of sight. An important factor that must be considered in these systems is multipath, due to the physical principle underlying the functioning of troposcatter systems. Diversity reception and broadband signals are used to overcome this factor's negative impact. However, broadband signals use an excessive frequency band and are characterized by a low spectral efficiency. Objective . Development of a method for overcoming the negative impact of multipath by using composite signals on the Walsh basis. Methods . Parallel composite signals provide simultaneous packet transmission of a group of signals built based on a complete system of mutually orthogonal Walsh-Hadamard functions. Each signal transmits one bit of information, but the parallel transmission of a packet of mutually orthogonal signals avoids decreasing the system's information speed. To counteract the effect of multipath, pilot signals are added to the composite signal, as individual Walsh-Hadamard functions with better auto- and cross-correlation properties are selected. The advantages of composite signals in the Walsh-Hadamard basis include their spectral efficiency, which significantly exceeds the spectral efficiency of broadband signals. The paper describes a method for forming a composite signal on a Walsh-Hadamard basis with pilot signals and a functional diagram of a receiving device that provides optimal pre-detector addition of signals from four independent diversity reception channels. Results . The method of forming the composite signal with pilot signals based on the Walsh-Hadamard basis is presented as a functional diagram of a reception device that will ensure optimal detection of composite signals from several independent channels of a separated receiver. The spectral efficiency of the composite signals is shown on the size of the Walsh-Hadamard vicor basis. The introduction of the pilot signals makes it possible to ensure the synchronous composition of signals received from several independent receiving channels. Conclusions. The proposed technical solutions using composite signals in the Walsh-Hadamar basis make it possible to create troposcatter communication systems that provide operation in multi-path conditions, and the spectral efficiency of which significantly exceeds this indicator for systems using M-sequence signals, which allows to increase in the information transmission rate at the same frequency bandwidth or to increase their noise immunity by using additional noise-resistant coding at a fixed information transmission rate.

References

Sposib troposfernogo zviyazku / Patent of Ukraine for a utility model No. 108632, publication date 07/15/2016, Bull. No. 14 with priority from 01/29/2016 / Ilchenko M.Yu., Narytnyk T.M., Slyusar V.I.
Recommendation ITU-R P.617-3 (09/2013). Propagation prediction techniques and data required for the design of trans-horizon radio-relay systems. P Series. Radiowave propagation/© ITU 2013.
Wave Propagation Models in the Troposphere for Long-Range UHF/SHF Radio Connections. / Available at:
https://www.diva-portal.org/smash/get/diva2:1473256/FULLTEXT02.pdf
Ilchenko M.Yu., Narytnyk T.M., Slyusar V.I. / Napryamky stvorennya troposfernykh stanciy novogo pokolinnya//Cyfrovi tekhnologiyi.-2014.- Nom. 16, P.p. 8-18
Narytnyk T.M., Vetoshko I.P., Semerij S.I., Saiko V.G., Sarapulov S.V. / Analitychnyi oglyad suchasnykh tekhnologii troposfernogo ta radioreleinogo zviyazku // Visnyk universytetu «Ukrayina». Seriya - Informatyka, obchyuslyuvalna tekhnika, kibernetyka, 2019. - # 2 (23). – P.p. 105-120.
Slyusar V.I., Masesov M.O. / Ideologiya pobudovy perspektyvnykh troposfernykh (radiorelejnykh) stancij specialnogo pryznachennya.// Zbirnyk naukovykh pracz` VITI NTUU “KPI”. – 2010. – N. 2. – P.p.. 114 -120.
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Cyfrovi radiorelejni ta troposferni liniyi zvyazku (osnovy rozraxunku) / Narytnyk T. M., Pochernyayev V. M., Povxlib V. S./ Odes. nacz. akad. zvyazku im. O. S. Popova. - Odesa : ONAZ im. O. S. Popova, 2019. - 163 s. - ISBN 978-617-582-066-7
T.N. Narytnyk, V.V. Volkov, Yu.V. Utkin / Radiorelejni i troposferni systemy peredachi / Navch. pos. – 2008.– 349 s.
Numerical Methods. Using MATLAB. Book • Fourth Edition • 2019 8.4 The Walsh Transforms
https://www.sciencedirect.com/book/9780128122563/numerical-methods
Vykorystannya funkczij Uolsha dlya pidvyshhennya energetychnoyi prykhovanosti cyfrovoyi radioliniyi / Andreyev O. V., Dubyna O. F., Nikitchuk T. M., Cyporenko V. V. // Visnyk NTUU «KPI». Radiotexnika, radioaparatobuduvannya : zbirny`k naukovy`x pracz`. – 2021. – N. 85. – P.p. 27-32.
https://doi.org/10.20535/RADAP.2021.85.27-32
Koduvannya sygnaliv v elektronnykh systemax. Chastyna 3. Sposoby koduvannya sygnaliv: Tom 1. Naturalni, efektyvni ta linijni kody [Elektronnyj resurs] : navch. posib. dlya stud. specialnosti 171 «Elektronika», osvitnoyi programy «Elektronni prylady ta prystroyi» / S.V. Denbnoveczkyj, I.V. Melnyk, L.D. Pysarenko / KPI im. Igorya Sikorskogo. – Elektronni tekstovi dani (1 fajl: 6,32 Mbajt). – Kyyiv : KPI im. Igorya Sikorskogo, 2021.

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§ 06 — Related

[1] Sposib troposfernogo zviyazku / Patent of Ukraine for a utility model No. 108632, publication date 07/15/2016, Bull. No. 14 with priority from 01/29/2016 / Ilchenko M.Yu., Narytnyk T.M., Slyusar V.I.

[2] Recommendation ITU-R P.617-3 (09/2013). Propagation prediction techniques and data required for the design of trans-horizon radio-relay systems. P Series. Radiowave propagation/© ITU 2013.

[3] Wave Propagation Models in the Troposphere for Long-Range UHF/SHF Radio Connections. / Available at:

[4] https://www.diva-portal.org/smash/get/diva2:1473256/FULLTEXT02.pdf

[5] Ilchenko M.Yu., Narytnyk T.M., Slyusar V.I. / Napryamky stvorennya troposfernykh stanciy novogo pokolinnya//Cyfrovi tekhnologiyi.-2014.- Nom. 16, P.p. 8-18

[6] Narytnyk T.M., Vetoshko I.P., Semerij S.I., Saiko V.G., Sarapulov S.V. / Analitychnyi oglyad suchasnykh tekhnologii troposfernogo ta radioreleinogo zviyazku // Visnyk universytetu «Ukrayina». Seriya - Informatyka, obchyuslyuvalna tekhnika, kibernetyka, 2019. - # 2 (23). – P.p. 105-120.

[7] Slyusar V.I., Masesov M.O. / Ideologiya pobudovy perspektyvnykh troposfernykh (radiorelejnykh) stancij specialnogo pryznachennya.// Zbirnyk naukovykh pracz` VITI NTUU “KPI”. – 2010. – N. 2. – P.p.. 114 -120.

[8] Narytnyk T.M. / Analiz elektromagnitnoyi bezpeky suchasnykh troposfernykh radiorelejnykh stancij / Materialy 2-oyi Mizhnarodnoyi naukovo-texnichnoyi konferenciyi «Problemy elektro-magnitnoyi sumisnosti perspektynykh bezdrotovykh merezh zvyazku EMS 2016» -s.61-63 m. Xarkiv

[9] Cyfrovi radiorelejni ta troposferni liniyi zvyazku (osnovy rozraxunku) / Narytnyk T. M., Pochernyayev V. M., Povxlib V. S./ Odes. nacz. akad. zvyazku im. O. S. Popova. - Odesa : ONAZ im. O. S. Popova, 2019. - 163 s. - ISBN 978-617-582-066-7

[10] T.N. Narytnyk, V.V. Volkov, Yu.V. Utkin / Radiorelejni i troposferni systemy peredachi / Navch. pos. – 2008.– 349 s.

[11] Numerical Methods. Using MATLAB. Book • Fourth Edition • 2019 8.4 The Walsh Transforms

[12] https://www.sciencedirect.com/book/9780128122563/numerical-methods

[13] Vykorystannya funkczij Uolsha dlya pidvyshhennya energetychnoyi prykhovanosti cyfrovoyi radioliniyi / Andreyev O. V., Dubyna O. F., Nikitchuk T. M., Cyporenko V. V. // Visnyk NTUU «KPI». Radiotexnika, radioaparatobuduvannya : zbirny`k naukovy`x pracz`. – 2021. – N. 85. – P.p. 27-32.

[14] https://doi.org/10.20535/RADAP.2021.85.27-32

[15] Koduvannya sygnaliv v elektronnykh systemax. Chastyna 3. Sposoby koduvannya sygnaliv: Tom 1. Naturalni, efektyvni ta linijni kody [Elektronnyj resurs] : navch. posib. dlya stud. specialnosti 171 «Elektronika», osvitnoyi programy «Elektronni prylady ta prystroyi» / S.V. Denbnoveczkyj, I.V. Melnyk, L.D. Pysarenko / KPI im. Igorya Sikorskogo. – Elektronni tekstovi dani (1 fajl: 6,32 Mbajt). – Kyyiv : KPI im. Igorya Sikorskogo, 2021.

METOD FOR INCREASING THE SPECTRAL EFFICIENCY OF TROPOSCATTER COMMUNICATION BASED ON THE USE OF COMPOSITE SIGNALS IN THE WALSH BASIS

Abstract

References

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