Industry 4.0
Vol. 10 (2025), Issue 3, pg(s) 91-94

TECHNOLOGICAL BASIS OF “INDUSTRY 4.0”

Multiple access interference protection in multichannel data transmission systems

  • 1 Technical University Chisinau, Republic of Moldova

Abstract

The article is a continuation of previous studies and deals with the results of research on the protection of multichannel data transmission systems with channel division by the signal code from unauthorized access. It is proposed to use derivatives of Walsh functions (with different generating functions) as spreading codes for the formation of noise-like signals in multichannel communication systems. The analysis showed that the correlation properties of the derivatives of Walsh functions used as spreading codes have significantly better correlation characteristics than the original ones. An analysis of various types of Walsh functions used as spreading codes for signals transmitted in multi-channel systems was carried out. As a result, there were defined the types of pseudo-random sequences for Walsh generating functions, in which
multiple access interference is absent. It was justified the advantage of using these signals in the development of CDMA systems in order to protect against interference from multiple and unauthorized access.

Keywords

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