Rajib Kar

Rajib Kar
National Institute of Technology, Durgapur · Department of Electronics and Communication Engineering

PhD

About

392
Publications
49,902
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
2,925
Citations
Introduction
Additional affiliations
October 2018 - present
National Institute of Technology, Durgapur
Position
  • Professor (Associate)
November 2002 - October 2018
National Institute of Technology, Durgapur
Position
  • Professor (Assistant)

Publications

Publications (392)
Article
Full-text available
This article presents a precise approach for far‐field radiation pattern (FFRP) correction of mutually coupled discrete dipole element (DDE) array of monopole antennas and concentric circular antenna array (CCAA) of dipole elements by employing the parametric assimilation technique (PAT). The effect of mutual coupling is a crucial part of any pract...
Article
Block oriented models are recurrently employed to describe the dynamic characteristics of nonlinear systems. This paper adopts an efficacious block-oriented model called cascaded Wiener-Hammerstein (W-H) structure to model a nonlinear system. The parameters of the W-H model are identified using a nature-inspired evolution algorithm-supported Kalman...
Article
This paper introduces a hybrid Sage-Husa adaptive Kalman filter (SHAKF) with a metaheuristic algorithm to estimate the parameters of the Hammerstein-Wiener (H-W) model. The initial state parameters of the SHAKF must be appropriately tuned based on the estimation problem; otherwise, it would lead to divergence. To get the global optimal tuned SHAKF...
Chapter
In this paper, extended gate and gate-stack-based charge-plasma gate-all-around TFET (EG-GS-CP-GAA) is designed for the first time. The device characteristics of EG-GS-CP-GAA are compared with the conventional device (CP-GAA). The proposed device shows lower IOFF, improved ION and ION/IOFF. The dual-gate materials in the proposed structure improve...
Article
Electro-encephalogram (EEG) signals are corrupted with numerous noises while recording itself which changes the attributes of physiological data. In this research, a swarm intelligence-based method for the enhancement of adaptive filters/noise cancellers (AFs/ANCs) is proposed and designed for denoising of electro-encephalogram/event-related potent...
Article
Full-text available
The primary aim of this paper is to pursue the optimal set of Wiener system coefficients using the meta-heuristic optimisation technique-based Kalman filter (KF). The best estimation of unknown parameters of a dynamic system by the basic KF approach majorly depends upon the efficiently tuned KF parameters such as process and observation noise covar...
Article
Identification of Hammerstein systems finds extensive applications in solving the stability and design issues of non-linear dynamic systems. Hence, in this paper, a first attempt is made to solve the parameter estimation problem of Hammerstein non-linear systems by using the evolutionary optimisation algorithm (EOA) coupled Kalman filter (KF). The...
Chapter
Fractional-order filters are regarded as the generalization of classical filters. The traditional Butterworth filter design approach involves rounding up the noninteger order to the nearest integer value. In contrast, the concepts of fractional calculus now allow the exact design order of the Butterworth filter to be realized in practice. This chap...
Article
Full-text available
In this paper, conventional charge-plasma nanowire tunnel field-effect transistor (CP-NWTFET) has been applied by gate stacking and SiGe sourced to design the proposed Si0.55Ge0.45 sourced nanowire tunnel field-effect transistor based on charge plasma and gate stack (SiGe-GS-CP-NWTFET) to enhance electrical characteristics. Comparison of drain curr...
Article
Full-text available
This paper introduces the generalization of the classical Transitional Butterworth-Butterworth Filter (TBBF) to the Fractional-Order (FO) domain. Stable rational approximants of the FO-TBBF are optimally realized. Several design examples demonstrate the robustness and modeling efficacy of the proposed method. Practical circuit implementation using...
Article
Cardiovascular or electrocardiogram signals (ECG) are contaminated by various artefacts while recording which in turn degrades the quality of the vital information present in the signal. Hence, noise removal from ECG signal is an important matter of concern. In this paper, swarm intelligence techniques for the optimization purpose of adaptive filte...
Article
This paper proposes a new and efficient approach where a nature-inspired optimisation technique has abetted the Kalman filter (KF) for accurately solving the parametric estimation problem of Volterra modelling based non-linear systems. The KF is the best optimal state estimator in terms of normalised mean squared error (NMSE) for linear Gaussian st...
Article
Full-text available
This paper proposes an efficient global gravitational search (GGS) algorithm-assisted Kalman filter (KF) design, called a GGS-KF technique, for accurate estimation of the Volterra-type nonlinear systems. KF is a well-known estimation technique for the dynamic states of the system. The best estimate is achieved if the system dynamics and noise stati...
Article
Full-text available
This paper proposes a Charge-Plasma-based Cylindrical-Gate-Nanowire Tunnel Field Effect Transistor (CPCG-NWTFET) and High-k Gate Stack Charge-Plasma-based Cylindrical-Gate-Nanowire Tunnel Field Effect Transistor (HKGS-CPCG-NWTFET) with the dielectric modulated split-gate label-free biosensor. Charged and uncharged (neutral) biomolecules with the di...
Article
Full-text available
Abstract An efficient compensation method is proposed for the reduction of mutual coupling among the elements of an antenna array using the optimum current amplitude excitation weights. The performance of an antenna array degrades heavily due to mutual coupling. The mutual coupling effect can neither be eliminated nor be ignored in the context of t...
Article
Full-text available
In this paper, dual-material dual-gate nanotube TFET (DMDG-NTTFET) is proposed. Dual gates in this regard are of the core–shell type, and dual-gate materials (GM1 and GM2) are used as control gate having work functions of φtunnel and φAuxiliary, respectively. The device is further explored with source pocket and various underlap gate lengths. When...
Article
Full-text available
The sensitivity of the hydrogen gas detector can be improved by using the extended-gate technique in nanowire FET. A ZnO-based extended-gate gate-stack junctionless nanowire field-effect transistor (EG-GS-JLNWFET) hydrogen gas device is considered for the first time in this work. Catalytic gate metal, palladium (Pd) on high-K dielectric reduces the...
Article
Full-text available
This article introduces an optimal design of finite impulse response-type Riesz fractional-order digital differentiator (FODD) of orders p = 0.3, 0.5, and 0.75. A very little study on Riesz-based differentiator has been reported so far. Moreover, none of the published Riesz FODD-based literature has studied the optimal design of Riesz FODD, which i...
Article
This paper presents a time modulated far-field radiation pattern synthesis of a compact circular antenna array (CAA) by employing a stochastic optimization technique known as grey wolf optimization (GWO). The compactness of the antenna array is achieved by reducing the inter-element distances between the elements of the array which leads to the min...
Article
This paper deals with the optimal design of digital fractional-order Butterworth filter (DFOBF) of order (n + α), where n is an integer and α ∈ (0, 1), using a single-step, discretization operator-free approach. Two distinct design routes are presented to realize the infinite impulse response (IIR) type DFOBFs with guaranteed stability and minimum-...
Article
Full-text available
This paper presents the optimal rational approximation of (1+α) order Butterworth filter, where α ∊ (0,1) under the continued fraction expansion framework, by employing a new cost function. Two simple techniques based on the constrained optimization and the optimal pole-zero placements are proposed to model the magnitude-frequency response of the f...
Article
This paper deals with the optimal analog‐to‐digital transformation of fractional‐order Butterworth filter (FOBF) in terms of infinite impulse response templates. The fractional‐order transfer function of the analog FOBF is transformed into its digital counterpart by employing the Binomial series expansion of different truncation orders, based on th...
Article
In this paper, an optimal far-field radiation pattern synthesis by using time modulation technique is carried out for a compact circular antenna array (CAA) design using a stochastic optimization method called krill herd (KH) optimization. A compact antenna array is achieved by reducing the inter-element spacing between the array elements, which le...
Article
Full-text available
This article shows the design of a non‐uniformly excited single ring circular antenna array (CAA) for the synthesis of optimal far‐field radiation characteristics. A recently proposed meta‐heuristic based optimization algorithm called gray wolf optimization (GWO) and state‐of‐the‐art swarm intelligence based evolutionary optimization technique know...
Article
This letter presents the design of digital fractional‐order Butterworth filter (DFOBF) of order (n+α), where n is an integer, and α ∈ (0,1), from the perspective of optimal realization. The magnitude–frequency characteristic of the DFOBF is optimally modeled using the computationally efficient lattice wave digital filters (LWDFs). Design examples f...
Article
The main objective of this paper is to improve the identification efficiency of non-linear systems using the Kalman filter (KF), which is optimised with the Artificial Electric Field (AEF) algorithm. The conventional KF suffers from the proper tuning of its parameters, which leads to a divergence problem. This issue has been solved to a great exten...
Article
This paper presents an efficient approach for the design of a non-uniform single ring circular antenna array (CAA) for the synthesis of the optimal far-field radiation pattern. A recently proposed meta-heuristic-based optimization technique known as ant lion optimization (ALO) is applied in this paper to determine the optimum set of current amplitu...
Article
In this letter, the optimal rational approximation of fractional‐order bandpass Butterworth filter (FOBBF) is presented. The transfer function of the FOBBF is decomposed into a multiplication of first‐order and second‐order terms. As a result, the design stability conditions can be easily satisfied using only the variable boundary constraints. The...
Article
This paper presents an efficient method to improve the far-field radiation pattern of concentric circular antenna array (CCAA) design using two stochastic optimization algorithms known as social spider algorithm (SSA) and modified social spider algorithm (MSSA). Low side lobe level (SLL) plays a crucial role in reducing the interference with the ot...
Article
A precise control in the stopband attenuation characteristics can be achieved by using the fractional-step filters instead of the traditional integer-order filters. In this paper, nine nature-inspired optimization algorithms, such as five advanced variants of differential evolution (DE), three advanced variants of particle swarm optimization (PSO),...
Article
In this paper, an evolutionary computation-based optimal design of low power, high gain inductive source degenerated CMOS cascode low noise amplifier (LNA) circuit is presented for 2.4[Formula: see text]GHz frequency. The main challenge for the design of radio frequency (RF) LNAs at nanometer range is the thermal noise generated in the short-channe...
Article
In this paper, a fractional-order bandpass Butterworth filter (FBPBF) exhibiting symmetric roll-off characteristic is approximated as an integer-order transfer function using a metaheuristic optimization approach. A novel cost function is proposed by considering the exact FBPBF magnitude characteristic obtained through cascading the (n+α), where n...
Article
This work is concerned with the methodology for improvement of the radiation pattern performance and eliminating the effect of unwanted interference of symmetric time modulated linear antenna array (STMLAA) in the predefined direction. This is achieved using evolutionary technique called Novel Particle Swarm Optimization with Wavelet Mutation (NPSO...
Article
This article introduces a new design of an optimised zero-phase response fractional order digital differentiator (FODD) called Riesz FODD of half order by employing a recently developed Manta-Ray Foraging Optimisation (MRFO) for improved and precise electrocardiogram QRS detection. A new weighted cost function is developed that precisely considers...
Article
Full-text available
In this paper, an optimal far‐field radiation pattern synthesis by using time modulation technique is carried out for linear antenna array (LAA), and concentric circular antenna array (CCAA) designs using a stochastic optimization method called grey wolf optimization (GWO). An improved far‐field radiation characteristic mainly depends on the synthe...
Article
This article proposes an efficient approach to design two different CMOS analogue circuits, namely p-channel Metal-Oxide-Semiconductor (PMOS) driver-based two-stage comparator and n-channel Metal-Oxide-Semiconductor (NMOS) driver-based folded-cascode operational amplifier, using a modified version of particle swarm optimization (PSO) known as crazi...
Article
Full-text available
Optimal integer‐order transfer function approximation of linear time‐invariant fractional‐order systems (FOS) using a straight‐forward approach is proposed here. The error between the rational approximant and the FOS (commensurate/non‐commensurate/oscillatory types etc.) is minimised directly in the frequency domain, subject to design stability con...
Article
Full-text available
This article proposes an area optimized design approach for two different analogue VLSI circuits: current mirror load based CMOS differential amplifier circuit and CMOS two-stage operational ampli�fier. The evolutionary method utilized for these optimal designs is the Seeker Optimization Algorithm (SOA). Human searching capability and understanding...
Chapter
Full-text available
The comparative optimizing efficiency of particle swarm optimization (PSO) and simplex particle swarm optimization (Simplex-PSO) method is explored in this work. A CMOS operational amplifier (Op-Amp) with low voltage has been optimized using this method. The concept of PSO is based on communal manner of bird flocking. PSO suffers from stagnation pr...
Chapter
A novel architecture of low power and highly stable SRAM cell has been proposed in this paper. The proposed design contains a voltage source (VS). This voltage source minimizes the swing voltage required for switching activity. Swing voltage reduction controls the dynamic power consumption at high speed. One NMOS transistor is used to isolate the d...
Chapter
This paper presents in front of us a novel approach for the optimal design of a Low Noise Amplifier (LNA) with inductive source degeneration circuit using a recently proposed evolutionary optimization technique called PSO with Aging Leader and Challenger (ALC-PSO). The proposed ALC-PSO based approach has succeeded in dealing with the disadvantages...
Chapter
As the microwave spectrum becomes more and more crowded with users, interference rejection techniques become increasingly necessary. One way to reduce the interference is to introduce a point of minimum signal reception in the interference direction of antenna radiation pattern. This article presents the synthesis of non-uniformly spaced linear arr...
Article
This paper presents an accurate design approach for concentric circular antenna array (CCAA) synthesis to improve the far-field radiation characteristics using a meta-heuristic optimization technique called ant lion optimization (ALO). The far-field radiation pattern is improved with lower side lobe level (SLL) which is essential for the reduction...
Article
Optimal rational approximation of the fractional-order Butterworth filter (FBF) based on a two-step design procedure is proposed. Firstly, the coefficients of the squared magnitude function of an approximant which matches the squared magnitude response of the ideal (1 + α)-order FBF, where 0<α<1, are determined using the Genetic Algorithm (GA). The...
Article
Full-text available
The design of a low-power, high-gain, highly linear complementary metal–oxide–semiconductor (CMOS) cascode low-noise amplifier (LNA) with an inductive source degeneration circuit for use at 5.5 GHz frequency is optimized using a flower pollination algorithm (FPA) as an evolutionary technique. The FPA is applied to optimize the noise figure (NF) whi...
Article
Our initial research work was focussed on employing metaheuristic optimization techniques to design optimal digital signal processing (DSP) systems such as the full band, conventional infinite impulse response differentiators and integrators meeting the accurate magnitude responses with a smaller average group delay. Since, integer order systems ar...
Article
This paper presents an efficient infinite impulse response (IIR) type digital fractional order differentiator (DFOD) based electrocardiogram (ECG) pre-processor to detect QRS complexes. Firstly, an efficient optimizer namely, Antlion optimization (ALO) algorithm is employed to solve the proposed DFOD design problem. Then the designed DFOD is deploy...
Article
Client-centric consistency models define the view of the data storage expected by a client in relation to the operations done by a client within a session. Monotonic reads is a client-centric consistency model which ensures that if a process has seen a particular value for the object, any subsequent accesses will never return any previous values. M...
Article
Full-text available
A new approach to determine the integer‐order transfer function approximation for α and α + β, where 0 < α, β < 1, fractional‐order analogue filters is presented. Reported works deal with this design problem by using techniques which are non‐optimal. The proposed designs with guaranteed stability are obtained by employing a global search optimisati...
Article
Full-text available
In this paper, a computationally efficient, highly accurate, wideband, stable, and minimum phase infinite impulse response type first‐order digital differentiator (DD) is designed by employing a swarm intelligence‐based search method called Salp Swarm Algorithm (SSA) for the QRS complex detection application. The optimal coefficients of the DD are...
Article
Full-text available
This study suggests an evolutionary technique namely symbiotic organisms search (SOS) algorithm based optimal designs of two different analogue very‐large‐scale integration circuits. The configurations considered here are nulling resistor compensation based complementary metal–oxide–semiconductor (CMOS) two‐stage op‐amp and two‐stage CMOS op‐amp wi...