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This paper investigates the possibility of real-life using the brand new type of digital modulation, which implies the transmission of white Gaussian noise whose variance changes in time. That modulation has been entitled as variance shift keying. The signals obtained on its basis have a high level of transmission security, and they even cannot be detected by standard means of matched filtering. However, the paper suggests the decision on how to process these signals at the receiver site. It is proposed to use a specially developed optimal receiver, whose restoration quality appears to be better in comparison with the conventional cumulative receiver. The digital simulation of propagation in frequency selective media has shown the signal with variance shift keying is possible to be used in real conditions since its distribution of instantaneous amplitudes remains Gaussian. © 2018 Academic Mind. ; The work was supported by Act 211 Government of the Russian Federation, contract № 02.A03.21.0006. The research was executed by the grant of the Ministry of education and science of the Russian Federation (project № 8.2538.2017/4.6).

The article analyzes the activities of the European Union within the framework of the Eastern Partnership in 2019–2021. The updated program of recovery, sustainability, and reforms, supported by an economic and investment plan, does not justify all its efforts. It also can reform the EU's relations with its Eastern partners and make them more depoliticized. This may lead to the fact that the EU will further reduce its transformational ambitions. And this, in turn, will call into question the fundamental aspect of his foreign policy identity – the role of the EU as a transformative force. In other words, such a development could not only weaken the EU's role in Eastern Partnership countries, but also undermine the value of its foreign policy.

This paper is devoted to the investigation of a developed sync system which is based on optimal receiver by average risk minimum criterion when detecting the reflected radar impulse under conditions of Gaussian and Johnson noises. M-sequence with single pulse phase-shift keying has been chosen as a reference signal. A transceiver has been implemented during the digital experiment. The use of developed self-Tuning system allows applying the optimal methods of reflected radar signal detection when it is noncoherently received under conditions of Gaussian and non-Gaussian noises. It has been proved that the developed sync system has the signal detection quality advantage over the system based on matched filter. © Published under licence by IOP Publishing Ltd. ; The work was supported by Act 211 Government of the Russian Federation, contract № 02.A03.21.0006. ; The research was executed by the grant of the Ministry of education and science of the Russian Federation (project № 8.2538.2017/4.6). ; IEEE APS