2687-0517
Computing, Telecommunication and Control
16
3
2023
1-73
RAR
RUS
7-17
Special Technological Center Ltd.
Klimenko
Denis
d.klimenk0@yandex.ru
St. Petersburg, Russian Federation
Peter the Great St.Petersburg Polytechnic University
Nikitin
Aleksandr
nikitin@mail.spbstu.ru
Polytechnicheskaya, 29, St.Petersburg, 195251, Russia
Peter the Great St. Petersburg Polytechnic University
Stroganov
Alexander
lemyr103@gmail.com
St. Petersburg, Russian Federation
U-4200-2017
6506501810
0000-0002-6916-9061
Peter the Great St.Petersburg Polytechnic University
Igor
A.
tsikin@mail.spbstu.ru
Polytechnicheskaya, 29, St.Petersburg, 195251, Russia
Features of centimeter-band filter-bank design based on GaAs pHEMT-technology
This article presents the results of the filter-bank design in the centimeter range. The filters are made in the form of microwave monolithic integrated circuits based on domestic GaAs pHEMT technology. The filter-bank includes bandpass filters operating in four subbands of the total frequency band 5.8 ... 18.2 GHz. The developed filters have VSWR of no more than 1.5 in the passband. Stopband suppression at 30% offset or more from the passband center frequency is more than 45 dB. When constructing filters of different subranges, different implementation options were used: lumped filters and microstrip filters based on interdigital and hairpin structures. Using the example of the microstrip bandpass filters design, the article discusses the features of modeling microwave monolithic integrated circuits in the AWR Design Environment.
10.18721/JCSTCS.16301
621.372.543
microwave
bandpass filter
GaAs рНЕМТ
interdigital
hairpin
electromagnetic simulation
https://infocom.spbstu.ru/article/2023.78.1/
RAR
RUS
18-28
Electronics and Communication Engineering, AL Muthanna University
Mansoor
Riyadh
riyadhdmu@mu.edu.iq
Samawa, Iraq
SOI photonic circuits for optical communication systems
This work considers the possibility of using ring resonators as optical modulators in communication systems. Ring resonators are the major component in all-optical integrated photonic circuits due to their small size, which contributes to increasing the integration density. Controlling the light intensity through the eclectic/optic effect is the main aim of this study. Electron/optic modulation through the use of the plasma dispersion effect is studied. The plasma dispersion effect is a mechanism by which a controlled change in the effective refractive index of Silicon on Insulator (SOI) can be achieved by changing the concentration of free carriers in the silicon waveguides. In the SOI ring resonator based optical modulator, the intensity of the light passing through the resonator is controlled by changing the refractive index of the ring waveguide material, which in turn changes the resonance conditions of the resonant modes. This change in the resonance conditions can be achieved by applying an electrical field to the modulating electrodes, which are placed in the rib waveguide. In this work, the theoretical analysis and the response of the modulator are first presented, then the performance is validated using 3D simulation software. Although the work concentrates more on the intensity modulation of On-Off keying, it also opens the door for using such compact modulators for different modulation techniques such as Orthogonal Frequency Division Multiplexing (OFDM); which means high data rate modulators using small-size devices.
10.18721/JCSTCS.16302
537
optical waveguides
optical modulator
photonic circuits
ring resonator
silicon on insulator
https://infocom.spbstu.ru/article/2023.78.2/
RAR
RUS
29-38
Pilipko
M.M.
m_m_pilipko@rambler.ru
Morozov
Dmitriy
dvmorozov@inbox.ru
Yenuchenko
Mikhail
post@mixeme.ru
MASH 2-2 Delta-Sigma Modulator with Dynamic Element Matching in 0.18 µm CMOS Technology
Design details and results of post-layout simulation for multi-stage noise-shaping 2-2 delta-sigma modulator based on 0.18 µm CMOS from JSC Mikron are presented. The circuit consists of two similar 2nd order stages connected sequentially and based on fully differential operational transconductance amplifiers and switched capacitors. The delta-sigma modulator processes a differential input signal and has a two-bit quantizer, which is a simple 2-bit analog-to-digital converter that contains three differential comparators. A special digital circuit is used, which provides dynamic element matching, also known as dynamic weighted averaging in digital-to-analog converter, which is connected to the switched capacitors. Supply voltage is 1.8V. Clock frequency is 1 MHz. Frequency band of the input signal is up to 8 kHz. Dynamic range is 62 dB. Power consumption is 1.9 mW.
10.18721/JCSTCS.16303
621.3.049.774.2
ADC
DSM
switched capacitors
DEM
OTA
differential comparator
2nd order
https://infocom.spbstu.ru/article/2023.78.3/
RAR
RUS
39-53
State Marine Technical University
Semenov
Nikolay
semenov@smtu.ru
St. Petersburg, Russian Federation
State Marine Technical University
Chemodanov
Mikhail
mikhail.chemodanov@gmail.com
St. Petersburg, Russian Federation
0009-0002-8919-3496
State Marine Technical University
Shestakov
Ivan
vanyww2@gmail.com
St. Petersburg, Russian Federation
Akhmetov
Denis
akhmetov_rphf@yahoo.com
Testing a heterogeneous group of autonomous unmanned underwater vehicles for search of objects on the bottom
The results of model and in-situ tests of control algorithms providing coordinated movement of a group of heterogeneous underwater robots in an uncertain three-dimensional moving environment in order to search for sunken objects on the bottom are being considered in the paper. Autonomous optical navigation of each robot, simulating the use of SLAM algorithms based on side-scan sonar (SSSI), interaction of robots with each other by means of surface buoys or a hydroacoustic modem, transfer of the detected objects` coordinates between robots in the group, and building a digital bottom map in the memory of each robot are used. The proposed control algorithms can be used both in centralized and decentralized control. Simulation model and field experimental data, confirming the performance of the proposed algorithms and protocols, are presented. The developed algorithms can be used in the control systems of mobile robots for their group control in uncertain 3D environments.
10.18721/JCSTCS.16304
62.5
group control
robot
group of robots
control system
AUV
underwater mapping
optical navigation
https://infocom.spbstu.ru/article/2023.78.4/
RAR
RUS
54-63
Peter the Great St. Petersburg Polytechnic University
Mbele Ossiyi
L.P.
lucprucell@gmail.com
St. Petersburg, Russian Federation
56049610600
0000-0003-1116-7765
Peter the Great St. Petersburg Polytechnic University
Drobintsev
Pavel
drobintsev_pd@spbstu.ru
St. Petersburg, Russian Federation
Analysis of personality traits based on the disc model using machine learning methods
The analysis of a person's social media behavior with respect to privacy and human rights provides information about their personality traits and is seen as a topical task today. In areas such as marketing, training, education, human resource management and hiring policies in companies, knowledge about personality traits proves to be profitable and important in decision making and business orientation cases. The paper analyzes the performance of machine learning methods in a personality trait identification task based on the DISC psychological model and a small size dataset created from scratch. Although the dataset created was relatively small, the machine learning methods used showed encouraging and convincing results. Results for all personality trait classifiers were improved using hyperparameter optimization, increasing the performance of the XGBoost classifier to 70.45% on the accuracy metric in the test sets.
10.18721/JCSTCS.16305
004
DISC model
personality traits
data pre-processing
machine learning
TF-IDF
XGBoost
https://infocom.spbstu.ru/article/2023.78.5/
RAR
RUS
64-73
0009-0006-1822-7117
Saint Petersburg Mining University
Kozhubaev
Yury
kozhubaev_yun@spbstu.ru
St. Petersburg, Russian Federation
Saint Petersburg Mining University
Ovchinnikova
Elena
St. Petersburg, Russian Federation
Saint Petersburg Mining University
Gorelik
Maria
St. Petersburg, Russian Federation
Peter the Great St. Petersburg Polytechnic University
Yiming
Yao
St. Petersburg, Russian Federation
Design and control of a fast charging module based on the USB-PD protocol
The main purpose of this article is to develop and design a USB_PD fast charging circuit based on the Type_C interface, to increase the battery life of electronic devices, provide an optimal power mode (minimum interface supply voltage of 5V while increasing the charging current). In this article, LDOs (Low Voltage Linear Regulator) are selected to implement an FPGA buck power supply, which is a fixed output regulator that provides low voltage output with current limiting, thermal shutdown, and battery reversal protection. To achieve this goal, the problems of high power consumption and low battery life caused by the rapid development of mobile devices such as mobile phones are analyzed, and it is indicated that the most effective solution at present is to increase the charging efficiency. The article briefly talks about the current state of fast charging research. The general structure of the USB PD fast charging protocol, the structure and functions of each part are analyzed. The physical layer simulation of the USB PD controller is completed using Verilog HDL, the function and implementation principle of each module is detailed, and the VCS is used for simulation to ensure that the design function is correct. The above-described board-level design is tested based on a programmable logic integrated circuit, and a logic analyzer and a protocol analyzer are used on the test results to achieve the expected design goals.
10.18721/JCSTCS.16306
621.311.6
fast charging module
USB-PD protocol
interface
Type_C
power transmission protocol
https://infocom.spbstu.ru/article/2023.78.6/