Article
Computer Science, Artificial Intelligence
Mary Paul Jeeshma, Menon Achuthamenon Monisha, Balachandran Remabai Vinod, Jacob Biji
Summary: This article investigates the discontinuous nature of SVPDM schemes and proposes five types of DSVPDM schemes based on selection of zero vectors. The optimized zero vector selection is found through analysis. The performances of the proposed DSVPDM schemes are compared with existing SVPDM and popular space vector based discontinuous pulse width modulation schemes, and validated on a real-time interface platform.
ADVANCES IN ELECTRICAL AND COMPUTER ENGINEERING
(2023)
Article
Automation & Control Systems
Monisha A. Menon, Biji Jacob
Summary: This article proposes a simplified space vector pulse density modulation (SVPDM) scheme for any odd-level inverter-based induction motor drive. The control strategy uses three sigma delta modulators, wherein the reference space vector is vector quantized to generate the output switching vectors. Compared with the SVPWM scheme, the proposed SVPDM scheme has advantages such as freedom from minimum pulsewidth problem, improved spectral features, convenience of digital implementation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Fernando Acosta-Cambranis, Jordi Zaragoza, Luis Romeral, Nestor Berbel
Summary: This article proposes a new modulation strategy for a five-phase high-frequency voltage source inverter based on sigma-delta modulators. The strategy achieves the same switching states as the traditional large-medium-large-medium space vector modulation using sigma-delta modulation, which operates efficiently at high switching frequencies using wide-bandgap devices. The proposed modulation techniques minimize switching losses, mitigate low-order harmonics, decrease the amplitude of high-frequency harmonics, and reduce common-mode voltage dv/dt transitions.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Fernando Acosta-Cambranis, Jordi Zaragoza, Nestor Berbel, Gabriel J. Capella, Luis Romeral
Summary: Various Sigma-Delta modulation techniques are proposed and evaluated to reduce the maximum peak-to-peak amplitude of common-mode voltage in a high-frequency voltage source inverter. These techniques achieve high-efficiency converter operation, output voltage with low total harmonic distortion, reduction in CMV amplitude and transitions, and decrease in conducted EMI amplitude. The use of single-loop and double-loop Sigma-Delta modulators is analyzed and experimentally evaluated.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Ke Bai, Dongdong Zou, Zixuan Zhang, Zibin Li, Wei Wang, Qi Sui, Zizheng Cao, Fan Li
Summary: A novel topology MASH delta-sigma modulator is proposed for enhancing noise-shaping capacity, and detailed comparison with traditional structures is presented. Experimental results show significant performance improvement of the proposed new topology MASH in a 20-km digital mobile fronthaul system.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Nishant Kumar, Karun Rawat
Summary: This study proposes a novel energy-efficient transmitter design scheme using optimized multi-level DSM and time-interleaved level splitting technique, which significantly improves transmitter efficiency. Hardware results demonstrate a significant improvement in CE and channel efficiency compared to conventional 6-level DSM, showing good performance.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2021)
Article
Engineering, Electrical & Electronic
K. R. Sahasranand
Summary: This paper proposes an adaptive A/D conversion scheme that identifies the presence or absence of a high frequency component in a given block of samples by formulating it as a hypothesis testing problem. The proposed scheme performs better in terms of compression compared to a scheme designed for the worst case while retaining the same guarantees on the reconstruction error.
IEEE SIGNAL PROCESSING LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Nishant Kumar, Karun Rawat, Fadhel M. Ghannouchi
Summary: This brief presents a new reconfigurable complex multi-band delta sigma polar modulator (CMB-DSPM) architecture for multi-band transmission. The proposed architecture improves the in-band and out-of-band performance in terms of signal-to-noise distortion ratio (SNDR) and coding efficiency (CE), respectively. Experimental results on a MATLAB/SIMULINK-based digital signal processing platform show significant improvements compared to the standard cartesian DSM architecture.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Engineering, Electrical & Electronic
Marouan Othmani, Noureddine Boulejfen, Alberto Brihuega, Fadhel M. Ghannouchi, Markus Allen, Mikko Valkama
Summary: This article presents two novel digital predistortion architectures that can mitigate the impairments in inphase/quadrature modulators and power amplifiers in wireless transmitters. The proposed architectures offer versatile linearization capabilities while using low-cost digital-to-analog converters, and they support the use of low-resolution DACs for designing low-cost and energy-efficient radio transmitters. Extensive hardware-in-the-loop RF verification measurements demonstrate the excellent linearization capabilities of the proposed solutions.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Article
Computer Science, Information Systems
Takashi Maehata, Noriharu Suematsu
Summary: This paper proposes a feasible implementation of the noise transfer function (NTF) for 1-bit BP-DSM with an elliptic filter, allowing for simultaneous setting of in-band and out-of-band gains, thereby improving signal transmission quality and stability.
Article
Optics
Wenqin Tan, Anting Xu, Zhibin Luo, Xiaowu Wang, Fan Li
Summary: In this paper, the digital mobile fronthaul architecture enabled by noise-coupling sturdy-multistage noise-shaping modulator is experimentally demonstrated and investigated. The noise-shaping capability of the modulator is verified by modulating orthogonal frequency division multiplexing component carriers to pulse-amplitude-modulation signal and transmitting them over optical links. The proposed modulator achieves better receiver sensitivity and reduces the number of adders and multipliers compared to previous methods. Additionally, filter-bank-multicarrier technique is demonstrated and investigated with reduced guard band and improved receiver sensitivity.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Mathematics, Applied
Olga Graf, Felix Krahmer, Sara Krause-Solberg
Summary: Manifold models are increasingly important in data analysis and signal processing. This paper focuses on one specific task in modern signal processing, which is the analog-to-digital (A/D) conversion using Sigma-Delta modulation. The paper addresses the issue of mismatches and large errors in classical Sigma-Delta schemes when the signal is defined on a circle. The authors propose an updated scheme based on reconstruction error analysis that improves the accuracy of the reconstruction.
ADVANCES IN COMPUTATIONAL MATHEMATICS
(2023)
Article
Engineering, Electrical & Electronic
Marouan Othmani, Noureddine Boulejfen, Matias Turunen, Markus Allen, Fadhel M. Ghannouchi, Mikko Valkama
Summary: In this article, a new robust and highly efficient digital predistortion concept for the linearization of wideband RF power amplifiers is proposed. The concept combines a parallelized delta-sigma modulator and a forward model of the power amplifier, applying multi-rate techniques to handle high signal bandwidth. Three time-interleaved parallel DPD variants are introduced, offering improved linearization performance. Extensive real-world RF measurements validate the excellent transmit signal quality of the proposed approach.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2023)
Article
Engineering, Electrical & Electronic
Chaolei Ma, Tingna Shi, Zhichen Lin, Zhanqing Zhou, Changliang Xia
Summary: This letter proposes a novel modulation method for the indirect matrix converter (IMC) by decoupling the rectifier and inverter, greatly simplifying the modulation of the IMC. The inverter uses a space vector modulation without a zero-voltage vector to adjust the phase of the output voltage vector, while the rectifier adopts a novel delta-sigma method to modulate the input current vector phase and dc-link voltage. The duty cycles of the inverter are obtained by looking up a table of reference output voltages and updated at a 5-kHz carrier cycle, while the switching states of the rectifier change once per cycle at a 40-kHz sampling frequency. Simulations and experimental results are presented to validate the proposed method.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Xiaochen Tang, Shanshan Liu, Farzad Niknia, Pedro Reviriego, Ziheng Wang, Wei Tang, Ahmed Louri, Fabrizio Lombardi
Summary: A Delta Sigma Modulator (DSM) based stochastic divider is proposed in this paper, which offers the best computation latency and accuracy. The proposed design shows advantages in SC-based neural networks and the application to Sobol-based sequences.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2022)
Article
Automation & Control Systems
Biji Jacob, M. R. Baiju
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2015)
Article
Engineering, Electrical & Electronic
T. Anish, Anish Gopinath, G. Shiny, M. R. Baiju
Article
Automation & Control Systems
Biji Jacob, M. R. Baiju
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2013)
Article
Automation & Control Systems
Monisha A. Menon, Biji Jacob
Summary: In this article, a digital control scheme based on space vector pulse density modulation for a two-level five-phase induction motor drive is proposed. The scheme combines principles of digital signal processing techniques, such as sigma delta modulation and vector quantization, to form computationally efficient motor drives. The advantages of the scheme include reduced computational complexity, reduced acoustic noise, and electromagnetic interference in the drive.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Automation & Control Systems
Monisha A. Menon, Biji Jacob
Summary: This article proposes a simplified space vector pulse density modulation (SVPDM) scheme for any odd-level inverter-based induction motor drive. The control strategy uses three sigma delta modulators, wherein the reference space vector is vector quantized to generate the output switching vectors. Compared with the SVPWM scheme, the proposed SVPDM scheme has advantages such as freedom from minimum pulsewidth problem, improved spectral features, convenience of digital implementation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Automation & Control Systems
Jeeshma Mary Paul, Biji Jacob
Summary: This article proposes a generalized online switching scheme for multilevel inverter based on direct vector quantized space vector pulse density modulation (DVQSVPDM), suitable for adjustable speed drive. The proposed DVQSVPDM reduces spurious switching and improves performance at lower modulation index by reducing total harmonic distortion (THD) of common mode voltage (CMV). The proposed scheme works for all n-level inverter topologies and the computations required remain the same irrespective of the level of inverter.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Proceedings Paper
Engineering, Industrial
Jeeshma Mary Paul, Biji Jacob
Summary: This paper introduces a 3D SVPDM scheme for two-level four-leg inverter that utilizes abc coordinate system to provide better harmonic performance compared to SVPWM schemes, without complex timing calculations. The proposed scheme is suitable for active power filter applications. Simulation results show that 3D SVPDM exhibits better total harmonic distortion characteristics than 3D SVPWM scheme.
2021 22ND IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL TECHNOLOGY (ICIT)
(2021)
Proceedings Paper
Automation & Control Systems
Monisha A. Menon, Biji Jacob
IECON 2020: THE 46TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY
(2020)
Proceedings Paper
Engineering, Industrial
Monisha A. Menon, Jeeshma Mary Paul, Biji Jacob
2020 IEEE 29TH INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE)
(2020)
Proceedings Paper
Computer Science, Information Systems
G. Shiny, M. R. Baiju
2015 IEEE INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING, INFORMATICS, COMMUNICATION AND ENERGY SYSTEMS (SPICES)
(2015)
Proceedings Paper
Engineering, Electrical & Electronic
David Solomon George, M. R. Baiju
PROCEEDINGS OF THE 2013 IEEE 7TH INTERNATIONAL POWER ENGINEERING AND OPTIMIZATION CONFERENCE (PEOCO2013)
(2013)
Proceedings Paper
Engineering, Electrical & Electronic
Pankaj Sagar, G. Shiny, M. R. Baiju
2013 IEEE 10TH INTERNATIONAL CONFERENCE ON POWER ELECTRONICS AND DRIVE SYSTEMS (IEEE PEDS 2013)
(2013)
