St. Petersburg State University of Telecommunications

About: St. Petersburg State University of Telecommunications is a education organization based out in Saint Petersburg, Russia. It is known for research contribution in the topics: Computer science & The Internet. The organization has 408 authors who have published 465 publications receiving 2160 citations.

Designing DC/DC Converters with Impulse Loads for Secondary Supply Systems of Transmit/Receive Modules for Active Phased Array Antennas of Radars

Abstract: The fundamental difference between voltage converters of secondary power supplies for transmit/receive modules of active phased array antennas with impulse load and converter with continuous power consumption is described. It is shown that methods to improve quality of transient processes in the converter with continuous power consumption during switching on and off are inapplicable to improve quality of transient processes in periodic current impulses caused by the impulse load. Options are reviewed for implementation of converters with single-loop negative feedback of output voltage with correction circuits and without correction; with energy storage capacitors, and with double-loop negative feedback of output voltage and choke current and with energy storage capacitor. It is shown that only voltage converters with double-loop negative feedback of output voltage and choke current and with energy storage capacitor provide for the required quality of power supply for transmit/receive modules of active phased array antennas.

Temporal complexity and efficiency of hybrid acousto-optic systems for signal detection

Abstract: Structure distinguishes of hybrid systems for unknown signals detection will lead us to the differences in efficiency and time it takes to process unknown signals detection. Because of this it is important to develop an approach, that allows to compare fast processing system's properties designated for a fixed value of detection's dependability. This is the subject under consideration in this paper.

Ridesharing for Carsharing Service Provider: Driver and Pedestrian Route Matching

Abstract: Nowadays there are a lot of car sharing service provider have been appeared in Russian market as well as in the world. Car sharing become popular since a person can have comfortable and quick transportation means in the city. This transportation means allow him/her to reach destinations without owning a private vehicle. However, sometimes for the car sharing user it is not possible to find a car in nearest location. In this case the car sharing company can propose customers who goes to the same destination to share the ride together with the travel expenses. The paper proposes an approach to matching of driver and pedestrian routes based on predefined constraints such as detours and additional time the customers are going to spend for ride sharing.

A Priority-Based Multichannel Mac to Support the Non-Safety Applications in SCH Interval at RSU in V2I Communication

Abstract: Abstract The transmission of safety applications in VANET is clearly the top concern. However, the non-safety applications, which improve the quality of experience, as well as the efficiency of the traffic, also need to be paid more attention. In VANET, the safety applications are transmitted in control channel interval and the non-safety applications can be transmitted only in service channel interval. In this paper, we propose a priority-based multichannel MAC to support the non-safety applications in service channel interval in Vehicle-to-Infrastructure communication with the presence of roadside unit. The novel MAC also allocates service channel according to the priority and divides the vehicles, which have the same required service channel, into four priority groups to enhance the EDCA mechanism. We use the mathematical model and the simulation for evaluating the performance under the influence of velocity with a different number of vehicles in the network.

Distributed Software Hardware Solution for Complex Network Sonification

Abstract: The paper presents the hardware software solution for sonification of complex networks and systems. The sonification expands the possibilities of an analysis of complex information through using the human hearing. Auditory displays allow reducing the operator’s workload and better detection of specific features and patterns in the data. The proposed sonification complex consists of two main parts. Data source located in the LO ZNIIS generates data that describes current state of a network or complex system, accumulates and redirects it. The parametric sonification layer located in the SUT converts the information into forms suitable for creating new audio environment, and represents the data as relevant timbral classes.