PROBABILISTIC CHARACTERISTICS OF ACCELERATED SEARCH SPREAD SPECTRUM SIGNALS

Vu Sy Dao
Le Quy Don University of Science and Technology, Hanoi, Vietnam
vusydaomtusi@gmail.com

Svetlana F. Gorgadze
Moscow Technical University of Communications and Informatics, Moscow, Russia
s.f.gorgadze@mtuci.ru

DOI: 10.36724/2664-066X-2025-11-3-13-21

SYNCHROINFO JOURNAL. Volume 11, Number 3 (2025). P. 13-21.

Abstract

The reasons for limiting the duration of a spread spectrum signal processed in a digital device for its accelerated search are considered, which are associated both with the instability of the frequencies of clock generators on the receiving and transmitting sides in the absence of preliminary clock synchronization, and with the conditional complexity and response speed of this device. A technique has been developed for analyzing the probabilistic characteristics of an accelerated search (detection) of a signal, which makes it possible to relate the allowable duration of its processing time and the signal-to-noise ratio at the receiver input.

Keywords:  spread spectrum signals, synchronization parameters, frequency and delay uncertainty regions, search, accelerated search, probabilistic characteristics of detection

References

[1] V.P. Ipatov, “Broadband systems and code division of signals,” Moscow: Mir Svyazi, 2007.

[2] C. Beard, W. Stallings, “Wireless Communication Networks and Systems,” London: Pearson, 2016.

[3] Vu Sy Dao, S.F. Gorgadze, “A device for accelerated search of a noise-like signal,” Information Society Technologies. Proceedings of the XVI International Industry Scientific and Technical Conference. Moscow, 2022, pp. 88-90.

[4] S.F. Gorgadze, T.M. Gut, “Accelerated evaluation of spread spectrum signals synchronization parameters,” 2020 Systems of Signals Generating and Processing in the Field of on-Board Communications, 2020. P. 9078627.

[5] T.M. Gut, S.F. Gorgadze, “Characteristics of covariance functions and estimation of noise-like signal parameters,” Telecommunications and Information Technologies. 2019. Vol. 6. No. 2, pp. 35-41.

[6] S.F. Gorgadze, “Accelerated digital algorithm for synchronization of noise-like signals in time and frequency,” Systems for synchronization, generation and processing of signals. 2016. Vol. 7. No. 4, pp. 16-18.

[7] S.F. Gorgadze, V.V. Boykov, “Measuring signals with multi-position subcarriers for satellite radio navigation systems,” Radio Engineering and Electronics. 2014. Vol. 59. No. 3. P. 264.

[8] S.F. Gorgadze, A.S. Vovk, “Estimation of Parameters of a Noise-Like Signal on a Non-harmonic Subcarrier,” Fundamental Problems of Radioelectronic Instrument-Making. 2014. Vol. 14. No. 5, pp. 182-185.

[9] L.E. Varakin, “Communication Systems with Noise-Like Signals,” Moscow: Radio and Communications, 1985, 384 p.

[10] V.I. Tikhonov, “Statistical Radio Engineering,” Moscow: Sovetskoye Radio, 1966, 219 p.

[11] S.F. Gorgadze, Vu Sy Dao, “Detection and synchronization of weak power spread spectrum signals in a satellite radio system,” T-Comm, 2023, vol. 17, no.8, pр. 4-20. DOI: 10.36724/2072-8735-2023-17-8-4-20

[12] S.F. Gorgadze, Vu Sy Dao, A.V. Ermakova, “Synchronization of gold sequences based on fast transform in a truncated basis of walsh-hadamard functions,” Radio engineering and electronics. 2024. Vol. 69. No. 2, pp. 137-145. DOI: 10.31857/S0033849424020045

[13] S.F. Gorgadze, Vu Sy Dao, A.V. Ermakova, “Synchronization of m-sequences based on fast hadamard transform,” Radio Engineering and Electronics. 2024. Vol. 69. No. 2, pp. 122-136. DOI: 10.31857/S0033849424020031