S.C. Gupta

Galgotias University

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Neelam Gupta

Banaras Hindu University

Timothy D. Leathers

Agricultural Research Service

Sonika Ahlawat

National Bureau of Animal Genetic Resources

H. El-Ghoroury

Ellipsis

R. Viswanathan

University of Mississippi

D. Polk

IBM (United States)

K. Renner

Oak Ridge National Laboratory

H.H. Hmimy

Southern Methodist University

Leonard Beevers

University of Oklahoma

R. Sahai

National Bureau of Animal Genetic Resources

Cooperative Institutions

Southern Methodist University

National Bureau of Animal Genetic Resources

Galgotias University

Indian Council of Agricultural Research

National Dairy Research Institute

Indian Institute of Soil Science

Purdue University West Lafayette

Chandigarh University

Indian Veterinary Research Institute

Amity University

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An all digital phase locked loop for synchronization of a sinusoidal signal embedded in white Gaussian noise

C.P. Reddy S.C. Gupta

An all digital phase locked loop which tracks the phase of the incoming sinusoidal signal once per carrier cycle is proposed. The different elements and their functions and the phase lock operation are explained in detail. The nonlinear difference equations which govern the operation of the digital loop when the incoming signal is embedded in white Gaussian noise are derived, and a suitable model is specified. The performance of the digital loop is considered for the synchronization of a sinusoidal signal. For this, the noise term is suitably modelled which allows specification of the output probabilities for the two level quantizer in the loop at any given phase error. The loop filter considered increases the probability of proper phase correction. The phase error states in modulo two-pi forms a finite state Markov chain which enables the calculation of steady state probabilities, RMS phase error, transient response and mean time for cycle skipping.

SIGNAL (programming language)

Gaussian Noise

Delay-locked loop

Phase synchronization

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Citations (8)

Changing the State of a Linear System by use of Normal Function and its Derivatives†

Journal of Electronics and Control (1963)

S.C. Gupta L. Hasdorff

For a linear system with real poles, two problems have bean attacked 1. Achieving a desired state from ground state in minimum time 2. Achieving maximum distance from the origin (ground state) when the excitation is magnitude limited. As is known (Gupta l962, Zacleh 1900), the state of a system can be changed in zero time using the impulse-function and its derivatives. This is, of course, not practical and therefore in this paper the impulse function is approximated by normal function and the above problems are attacked using this normal function and its derivatives. This method shows to what degree the impulse function response can be approximated using this typo of excitation and shows the practicality of this type of input.

10.1080/00207216308937507

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Citations (14)

The error probability performance of Gray encoded QPSK scheme with co-channel interference in a slow fading indoor channel

R. Krishnamurthi S.C. Gupta

A theoretical analysis of the error performance of a Gray encoded quadrature phase shift keying (QPSK) scheme in the presence of thermal Gaussian noise and a fading cochannel interference signal in a slow fading indoor wireless channel is presented. The exact error probability expression is presented in a closed form with the error manifesting the combined effect of noise and interference. The system model and the underlying assumptions are specified, and the problem is formulated. The expressions for the bit and symbol error rates are derived. The performance plots and conclusions are presented. It is shown that the exact bit error ratio and the symbol error can be expressed in a closed form.< >

Probability of error

10.1109/vetec.1990.110373

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Citations (2)

Direct sequence spread spectrum serial acquisition in a nonselective and frequency selective Rician fading channel

Essam Sourour S.C. Gupta W. Refai

The mean acquisition time performance of a straight, serial-search direct-sequence spread spectrum (DS-SS) acquisition system, operating in nonselective and frequency-selective Rician fading channels is analyzed. The system was proposed by Polydoros and Weber (1984), and its performance is analyzed for a nonfading channel, at which all the cells that fall under hypothesis H/sub o/ are statically identical. This is not the case for the Rician fading channel. A signal flow graph for which the H/sub o/ cells are not identical is used to derive an expression for the mean acquisition time in terms of the probabilities of detection and false alarm. These probabilities are then derived for the nonselective and frequency selective Rician fading channels. The results show the effect of the channel and system parameters on the mean acquisition time performance.< >

Rician fading

False alarm

10.1109/milcom.1990.117407

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Citations (6)

Biological Limitations on the Length of Highly Repetitive DNA Sequences that May be Stably Maintained within Plasmid Replicons in Escherichia coli

Nature Biotechnology (1983)

S.C. Gupta H L Weith Ronald L. Somerville

Palindromic sequence

Dodecameric protein

Multiple cloning site

10.1038/nbt0983-602

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Citations (15)

Innovative Turned and Collaborative Technology using Simulated IoT Applications

2022 4th International Conference on Inventive Research in Computing Applications (ICIRCA) (2022)

L. Maria Michael Visuwasam Ankur Kumar Gupta Rachna Chaudhary S.C. Gupta Pankaj Borah

Distributed system allows for quick access to computing, stockpiling, and even connection. Yet, for systems and networks that are far from a consolidated public cloud or data centre source, these centralised architectures might cause delays and performance difficulties. If data analysis is concentrated in the cloud, for example, to analyse emergency circumstances, any connectivity failures or delays will hinder the function and endanger human life. However, the restricted availability of such edge servers thwarts this interesting proposal. The virtual edge computing concept is discussed in this study as a way forward. By remotely accessing all assets, particularly edge routers, and making them readily accessible through endpoints, virtual edge bridges the internet, periphery, and swamp worlds. Fog and cloud technologies architectures are intriguing solutions to cloud-based technologies, particularly for rapid reaction to crises can also be used to allow new microservices and collaborative remedies for pcs. This research study provides a comprehensive virtual frontier framework and some of the important research challenges that must be addressed to facilitate more pervasive and efficient better external.

Microservices

Edge device

10.1109/icirca54612.2022.9985481

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Citations (0)

A class of all digital phase locked loops - Modelling and analysis.

C.P. Reddy S.C. Gupta

An all digital phase locked loop which tracks the phase of the incoming signal once per carrier cycle is proposed. The different elements and their functions, and the phase lock operation are explained in detail. The general digital loop operation is governed by a non-linear difference equation from which a suitable model is developed. The lock range for the general model is derived. The performance of the digital loop for phase step, and frequency step inputs for different levels of quantization without loop filter, are studied. The analytical results are checked by simulating the actual system on the digital computer.

Lock (firearm)

Digital Control

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Citations (1)

Distributional approach to the analysis of linear time-varying systems†

International Journal of Control (1971)

R. Bittel S.C. Gupta

Abstract This paper is devoted to the analysis of linear time-varying systems using distribution theory. The technique is developed to obtain the output given the input as well as to obtain the impulse response from the knowledge of the output and input. All quantities are considered time varying. The basic approach used converts the integral equation into a distributional differential equation. Notes †Communicated by Professor S. C. Gupta. The work reported in this paper has been supported by NS.F Grant GK-1965 Additional informationNotes on contributorsR. H. BITTEL‡ Now with DCA System Engineering Facility, Reston, Virginia 22070.

Impulse response

10.1080/00207177108932021

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Citations (1)

LIKELIHOOD RECEIVER FOR FH-MFSK MOBILE RADIO*

International Telemetering Conference Proceedings (1982)

R. Viswanathan S.C. Gupta

Frequency-shift keying

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Citations (0)

Nonparametric Receiver for FH-MFSK Mobile Radio

IEEE Transactions on Communications (1985)

R. Viswanathan S.C. Gupta

Various parametric receivers such as the maximum likelihood and the hard-limiter have been analyzed for their performance in decoding the frequency hopped multilevel FSK (FH-MFSK) messages in mobile environment. Here, some nonparametric receivers such as the maximum rank sum receiver (MRSR) and the reduced rank sum receiver (RRR) are considered. RRR and MRSR are nearly identical in performance but the former is much simpler to implement. The results indicate that RRR is a competing alternative to the parametric receivers.

Frequency-shift keying

Rank (graph theory)

10.1109/tcom.1985.1096265

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Citations (24)