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Orthogonal CCSK Based on Complementary Code Sequences

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Abstract

There are considered the aspects of application of modulation technique called Cyclic Code Shift Keying (CCSK) and signals processing in different communication applications, such as LPI, satellite navigation, deep space communication, TDCS technique, IoT networks, etc. On a basis of selection of principally new (“complementary”) basis function we state and solve the problem of development of modulation/demodulation technique combining processing simplicity, which is specific for the signals with cyclic structure, noise immunity, specific to orthogonal systems. The estimation of computational cost gain in compare to known orthogonal modulation method and noise immunity gain regarding traditional CCSK allows to define limitary technical parameters where obtained results are advisable to be used. A length of “spectrum spreading” sequences in this case is from N = 64 to N = 1024 covering whole range of practically valuable values. Obtained results allow to essentially extend the term of autonomous operation of low-power devices of the internet of things, increase of energy budget of radiolines in deep space communication systems, make possible the reception of the signals with ultra wide basis in communication systems with increased requirements to energy and structural security.

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Notes

  1. In particular case, correlations of signals based on the Walsh code can be calculated by finding the Hadamard metrics using a butterfly algorithm [4], where savings in computations are achieved by reusing previously obtained partial correlations common to all reference copies. However, this is only possible for signals based on Hadamard matrices with a fixed (and therefore easily predictable) structure that do not provide the necessary structural secrecy.

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Authors and Affiliations

  1. Ukrainian State Centre of Radio Frequencies, Kyiv, Ukraine

    I. A. Gepko

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  1. I. A. Gepko
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Correspondence to I. A. Gepko.

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ADDITIONAL INFORMATION

I. A. Gepko

The authors declare that they have no conflicts of interest.

This article does not contain any studies with human participants or animals performed by any of the authors.

The initial version of this paper in Russian is published in the journal “Izvestiya Vysshikh Uchebnykh Zavedenii. Radioelektronika,” ISSN 2307-6011 (Online), ISSN 0021-3470 (Print) on the link http://radio.kpi.ua/article/view/S0021347022020017 with DOI: https://doi.org/10.20535/S0021347022020017

Additional information

Translated from Izvestiya Vysshikh Uchebnykh Zavedenii. Radioelektronika, No. 2, pp. 71-83, February, 2022 https://doi.org/10.20535/S0021347022020017 .

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Gepko, I.A. Orthogonal CCSK Based on Complementary Code Sequences. Radioelectron.Commun.Syst. 65, 61–71 (2022). https://doi.org/10.3103/S0735272722020017

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