SYSTEMS OF ORTHOGONAL BIPHASIC SIGNALS ON THE BASIS OF BENT-SEQUENCES

Abstract

The problem of constructing of orthogonal systems of biphasic signals having good auto and intercorrelation properties is relevant for the CDMA technology, which is the basis of the third, fourth and fifth generations of mobile communication. Known methods for constructing orthogonal systems of biphasic signals (based on Walsh functions, on the basis of perfect binary arrays) allows to synthesize only small from cryptographic point of view numbers of systems that have good aperiodic correlation properties, making it difficult to implement the concept of operational change of working ensemble of signals in order to protect the information. In this paper, we propose a method of synthesis of orthogonal systems of biphasic signals based on complete class of bent-sequences and regular operator of dyadic shift. The volume of constructed sets of orthogonal systems is . Research of the depending of error probability from aperiodic correlation properties of the constructed systems of signals allowed to confirm their high efficiency, both in terms of noise immunity, and from the point of view of information security