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11th National Conference with International Participation, ELECTRONICA 2020

作者： Denisenko, Darya Yurievna Prokopenko, Nikolay Nikolaevich Butyrlagin, Nikolav Vladimirovich Don State Technical University Department of Information Systems and Radio Engineering Rostov-on-Don344006 Russia Institute for Design Problems in Microelectronics of Russian Academy of Sciences Zelenograd124681 Russia Institute for Design Problems in Microelectronics of Russian Academy of Sciences Sovetskaya St. 3 Zelenograd124681 Russia

ISBN: (纸本)9781728175317

New low-pass filter (LPF) architectures based on differential difference operational amplifiers (DDOA) are studied in this paper. The feature of the proposed LPF is that when tuning the cut-off frequency, the LPF gain remains unchanged at zero frequency. As a tuning element, it is possible to use digital potentiometers. The basic equations for two LPF modifications are presented, which provide parametric synthesis of circuits. The results of computer simulation of tunable responses were given in Micro-cap CAD. © 2020 IEEE.

关键词： Operational amplifiers

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Antenna Arrays Calibration Using Recursive Least Squares Adaptive Filtering Algorithms Based on Inverse QR Decomposition

Antenna Arrays Calibration Using Recursive Least Squares Ada...

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2020 IEEE East-West design and Test Symposium, EWDTS 2020

作者： Djigan, Victor Kurganov, Vladislav Institute for Design Problems in Microelectronics of Ras Department of Integrated Circuits Design Methodology Moscow Russia Institute of Microdevices and Control Systems National Research University of Electronic Technology Moscow Russia

ISBN: (纸本)9781728198996

This paper considers the antenna arrays calibration by the using of the Recursive Least Squares (RLS) adaptive filtering algorithms. An algorithm, based on the inverse QR decomposition, has been selected among the diversity of the RLS algorithms. This is caused by its stable operation. Because the algorithm contains the computationally heavy square root operations, a square root free version of the algorithm is also presented. Both versions of the QR RLS algorithms are mathematically identical to each other if they operate in float point arithmetic. The proposed calibration can be used in the antenna arrays with digital beamforming, because the algorithms usage requires the access to the array channel signals. The calibration requires a known training signal, which can be easily provided not only in a laboratory environment, but also in a field operation, if an array is used as a directional antenna of the digital communication system equipment. In the second case, the calibration can be also conducted even in the presence of the interference signal sources. Simulation validates the proposed calibration algorithm, using linear antenna arrays with 4, 8 and 16 antennas with a half wavelength distance between the neighbor antennas. In this simulation, the array channel noise has been varied in 0.. 30 dB range of the Signal-to-Noise Ratio. Two interference sources with the-30 dB Signal-to-Interference Ratio each have been simulated. These sources were located symmetrically relatively the required main lobe direction of the array radiation pattern. A training signal has been simulated as a random one with no specific autocorrelation properties. The signal has been modulated by the Phase Shift Keying (PSK) and the Quadrature Amplitude Modulation. © 2020 IEEE.

关键词： Beamforming

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Least Squares Criterion Adaptive Filtering Algorithms as Tools for Calibration of Arrays with Digital Beamforming

Least Squares Criterion Adaptive Filtering Algorithms as Too...

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2020 IEEE Ukrainian Microwave Week, UkrMW 2020

ISBN: (纸本)9781728173139

This paper explores the application of the adaptive filtering algorithms, based on Least Squares (LS) criterion for the calibration of the receiving arrays with digital beamforming. The digital beamforming assumes the access to the signals in the array channels as a requirement, which has to be provided if the adaptive signal processing is used. In this case, the adaptive filtering algorithms, based on the minimization of the LS error between the desired and array output signals, are able to estimate the channel parameter spread, which values can be stored and used for correction of the array weights during the beam steering. If a set of steered beam positions is known, for example in scanning arrays, the proposed algorithm allows to create a codebook of the array weights, which ensures the random variation of channel's parameters compensation and correct beam steering. The architecture of the proposed solution and mathematical description of a Recursive Least Squares (RLS) adaptive filtering algorithm, on which the calibration is based on, are presented. The algorithm uses a dynamic regularization of the array input signal correlation matrix. No specific correlation properties are required for the algorithm training signal. The simulation results demonstrate the ability of the calibration algorithm to compensate the channel's parameters spread. If the array channel Signal-to-Noise Ratio (SNR) is 0... 30 dB, then the achieved spread of the calibrated channels gain errors is about -20 dB. The norm of the ideal and calibrated array difference is also about -20 dB. The results are obtained with the Phase Shift Keying (PSK) and Quadrature Amplitude Modulated (QAM) training signals. The ability of the proposed calibration algorithm to operate in interference conditions is also demonstrated © 2020 IEEE.

关键词： Beamforming

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Notch filter on differential difference operational amplifier 3

Notch filter on differential difference operational amplifie...

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3rf International Scientific Conference on Metrological Support of InnovativeTechnologies, ICMSIT 2022

作者： Yu Denisenko, D. Prokopenko, N.N. Ivanov, Yu I. Butyrlagin, N.V. Information System and Radio Engineering Department Don State Technical University Gagarin Sq. 1 Rostov-on-Don344000 Russia Department of Automatic Control Systems Southern Federal University Bolshaya Sadovaya St. 33 Rostov-on-Don344000 Russia Department of Information System and Radio Engineering Don State Technical University Gagarin Sq. 1 Rostov-on-Don344000 Russia Institute for Design Problems in Microelectronics of Russian Academy of Sciences IPPM RAS Zelenograd124681 Russia

A new notch filter (NF) circuit based on a single differential difference operational amplifier (DDA) has been developed and studied, which is characterized by reduced current consumption in the static mode. Equations are obtained for the transfer functions and parameters of the NF, which includes a low-pass filter and a Sallen-Key high-pass filter, the signals of which are summed by the DDA. Computer modeling of the NF in CAD Micro-Cap was performed. © Published under licence by IOP Publishing Ltd.

关键词： Operational amplifiers

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Active Sallen-Key RC-High-Frequency filter based on non-inverting voltage followers 3

Active Sallen-Key RC-High-Frequency filter based on non-inve...

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3rf International Scientific Conference on Metrological Support of InnovativeTechnologies, ICMSIT 2022

作者： Yu Denisenko, D. Prokopenko, N.N. Ivanov, Yu I. Butyrlagin, N.V. Information System and Radio Engineering Department Don State Technical University Gagarin Sq. 1 Rostov-on-Don344000 Russia Department of Automatic Control Systems Southern Federal University Bolshaya Sadovaya St. 33 Rostov-on-Don344000 Russia Head of Information System and Radio Engineering Department Don State Technical University Gagarin Sq. 1 Rostov-on-Don344000 Russia Institute for Design Problems in Microelectronics of Russian Academy of Sciences IPPM RAS Zelenograd124681 Russia

A new high-pass filter (HPF) circuit of the second-order Sallen-Key family has been developed and studied, in which independent adjustment of the main parameters is realized -the pole frequency, the quality factor of the pole and the transmission coefficient. The basic equations for the transfer functions and HPF parameters are presented. The results of computer simulation a proposed circuits HPF in CAD Micro-Cap 12 are shown. © Published under licence by IOP Publishing Ltd.

关键词： High pass filters

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Synthesis of Approximate Combinational Circuits based on Logic Regression Approach

Synthesis of Approximate Combinational Circuits based on Log...

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East-West design & Test Symposium (EWDTS)

作者： Alexander Stempkovsky Dmitry Telpukhov Roman Solovyev Institute for Design Problems in Microelectronics of RAS Moscow Russia Department of Integrated Circuits Design Methodology Institute for Design Problems in Microelectronics of RAS Moscow Russia

ISBN: (数字)9781728198996

ISBN: (纸本)9781728199009

Approximate synthesis is a modern trend in the field of logic synthesis, which makes it possible to obtain much more compact, high-speed and reliable solutions due to weakening requirements for the accuracy of the implemented functions. For a number of applications, small distortions at outputs can be more than acceptable, and the improvement of characteristics is a powerful argument in favor of this method. We propose a new approach to the approximate synthesis of combinational logic, which is built upon solving the logic regression problem with the use of iterative methods based on two-level minimization. In the paper we state the logic regression problem and describe its possible applications. Solution based on two-level minimization methods is presented. We performed experimental research, which demonstrates high efficiency of the method. We revealed a fundamental drawback of the proposed method, that is, complexity of implementing circuits with a large number of linearly non-separable elements (XOR, NXOR). The ways to overcome this drawback are outlined.

关键词： Task analysis Iterative methods Complexity theory microelectronics Approximation algorithms Convergence Prediction algorithms

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Third-Order Low-Pass Filters for Limiting the Signal Spectrum at the Differential Input of the Analog/Digital Converters

Third-Order Low-Pass Filters for Limiting the Signal Spectru...

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International Conference for Young Scientists on Issues of Physics and Technology in Science, Power Industry and Medicine 2019, IPTSPIM 2019

作者： Yu Denisenko, D. Prokopenko, N.N. Butyrlagin, N.V. Department of Information System and Radio Engineering Don State Technical University Gagarin Sq. 1 Rostov-on-Don344000 Russia Department of Automatic Control Systems Southern Federal University Bolshaya Sadovaya St. 33 Rostov-on-Don344000 Russia Institute for Design Problems in Microelectronics of Russian Academy of Sciences Institute for Design Problems in Microelectronics Ras Sovetskaya St. 3 Zelenograd124681 Russia

Two new architectures of the third-order low-pass filters (LPF) based on differential (Op-Amp) and differential difference amplifiers (DDA) with a paraphase output are compared. This architectures designed for practical use as anti-aliasing filters in analog-to-digital converters of sensor signals of various physical quantities. The basic equations of the developed LPF modifications that make possible to perform their parametric synthesis are given. The computer simulation results are presented, which show that the LPFs under consideration provide the guaranteed frequency response (FR) attenuation outside the bandwidth being implemented on Op-Amps by Analog Device (AD8132) and Texas Instruments (THS4131). © Published under licence by IOP Publishing Ltd.

关键词： Low pass filters

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The Sound Demixing Challenge 2023 – Cinematic Demixing Track

arXiv

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arXiv 2023年

作者： Uhlich, Stefan Fabbro, Giorgio Hirano, Masato Takahashi, Shusuke Wichern, Gordon Le Roux, Jonathan Chakraborty, Dipam Mohanty, Sharada Li, Kai Luo, Yi Yu, Jianwei Gu, Rongzhi Solovyev, Roman Stempkovskiy, Alexander Habruseva, Tatiana Sukhovei, Mikhail Mitsufuji, Yuki Sony Europe B.V. Stuttgart Germany Sony Group Corporation Tokyo Japan Mitsubishi Electric Research Labs Cambridge United States AIcrowd Bengaluru India AIcrowd Lausanne Switzerland Tencent AI Lab Shenzhen China Department of Computer Science and Technology Tsinghua University Beijing China Institute for Design Problems in Microelectronics Russian Academy of Sciences Moscow Russia

This paper summarizes the cinematic demixing (CDX) track of the Sound Demixing Challenge 2023 (SDX’23). We provide a comprehensive summary of the challenge setup, detailing the structure of the competition and the datasets used. Especially, we detail CDXDB23, a new hidden dataset constructed from real movies that was used to rank the submissions. The paper also offers insights into the most successful approaches employed by participants. Compared to the cocktail-fork baseline, the best-performing system trained exclusively on the simulated Divide and Remaster (DnR) dataset achieved an improvement of 1.8 dB in SDR, whereas the top-performing system on the open leaderboard, where any data could be used for training, saw a significant improvement of 5.7 dB. A major source of this improvement was making the simulated data better match real cinematic audio, which we further investigate in detail. Copyright © 2023, The Authors. All rights reserved.

关键词： Machine learning

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Computing Observability of Gates in Combinational Logic Circuits by Bit-Parallel Simulation

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Computational Mathematics and Modeling 2019年第2期30卷 177-190页

作者： Telpukhov, D.V. Nadolenko, V.V. Gurov, S.I. Head of the ICDM Department Institute for Design Problems in Microelectronics (IPPM RAS) Moscow Russian Federation Institute for Design Problems in Microelectronics (IPPM RAS) Moscow Russian Federation Faculty of Computational Mathematics and Cybernetics Lomonosov Moscow State University Moscow Russian Federation

The article considers vector computation methods (bit-parallel simulation) for determining the observability of combinational logic gates. The computations produce an ODC (observability don’t care) set of all gates for a given set of circuit states. These results make it possible to evaluate the probability of logical masking of a random circuit fault. The methods are compared by accuracy and time costs using testing results for ISCAS ’85 benchmark circuits. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.

关键词： bit-parallel simulation combinational circuits observability ODC

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Frequency-dependent resolution using asymmetric terajet microscopy

Frequency-dependent resolution using asymmetric terajet micr...

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International Conference on Infrared and Millimeter Waves

作者： Alesia G. Paddubskaya Nadzeya I. Valynets Andrey V. Novitsky Yanfeng Li Jianqiang Gu Jiaguang Han Oleg V. Minin Igor V. Minin Laboratory of Nanoelectromagnetics Institute for Nuclear Problems of Belarusian State University Minsk Belarus Department of Physical Optics and Applied Informatics Belarusian State University Minsk Belarus Center for Terahertz Waves Key Laboratory of Optoelectronics Information and Technology (Ministry of Education of China) College of Precision Instrument and Optoelectronics Engineering Tianjin University Tianjin China Siberian State University of Geosystems and Technologies Novosibirsk Russia Novosibirsk Branch of Rzhanov Institute of Semiconductor Physics SBRAS "Technological Design Institute of Applied Microelectronics Novosibirsk Russia

ISBN: (数字)9798350370324

ISBN: (纸本)9798350370331

In this paper, we propose a concept of resolution enhancement for sub-terahertz (THz) images by employing the coupling between a dielectric sphere and a time-domain THz spectrometer. The terajet effect is used as a simple approach to overcome the diffraction limit. Correlation between the resolutions in the x- and y-directions and the frequency of the incident THz beam is analyzed both analytically and experimentally.

关键词： Couplings Image resolution Correlation Diffraction Microscopy Dielectrics Time-domain analysis

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