Sudipta Chattopadhyay

Work place: Department of Electronics and Telecommunication Engineering Jadavpur University, Kolkata-700032,India



Research Interests: Digital Library, Coding Theory, Line Coding, Control Theory, Source Coding


Sudipta Chattopadhyay received her B. Tech in Instrumentation Engineering in 1994 from
Calcutta University, Kolkata- 700 009, India and M.E.Tel.E in 2001 from Jadavpur University,
Kolkata – 700 032, India. She received her Ph.D from Jadavpur University, Kolkata – 700
032, India in 2012. She was a Lecturer in the Department of Electronics and Communication
Engineering at Institute of Technical Education and Research, Bhubaneswar,India, from
1996-2001 and also worked as Lecturer, Sr. Lecturer and Asst. Professor in the Department of
Electronics and Communication Engineering at Netaji Subash Engineering College, Kolkata –
52 A Novel Orthogonal Minimum Correlation Spreading Code in CDMA System 700 152, India, from 2001-2006. She is now working as an Assistant Professor in the Department of Electronics and Telecommunication Engineering, Jadavpur University, Kolkata – 700 032, India since 2006. She has published a number of papers in International/National Conferences. Her current research interests include Digital/Mobile Communication, Coding Theory and Digital Signal Processing. Mrs. Chattopadhyay is a member of IEEE since last 13 years. She is also an Executive Committee member of the Affinity Group ―Women in Engineering‖ under IEEE Calcutta Section.

Author Articles
A Novel Orthogonal Minimum Correlation Spreading Code in CDMA System

By Shibashis Pradhan Sudipta Chattopadhyay Sujatarani Raut

DOI:, Pub. Date: 8 Mar. 2014

Code Division Multiple Access (CDMA) is a technique in which transmission of information takes place simultaneously over the same available channel bandwidth. CDMA systems make use of spread spectrum (SS) technique for transmission of information by employing spreading codes. Each user is assigned with a unique spreading code which acts as a signature code for that individual user. The CDMA system experiences Multiple Access Interference (MAI) and Inter Symbol Interference (ISI) because of the non-orthogonality of the spreading codes. Both the MAI and ISI are the functions of auto-correlation and cross-correlation values of the spreading code respectively. In this paper, a novel orthogonal spreading code called “Orthogonal Minimum Correlation Spreading Code” (OMCSC) has been proposed which can serve a large number of users and is simultaneously expected to reduce the effect of MAI and ISI. Moreover, the Bit Error Rate (BER) performance of the proposed code has been compared with the existing codes using Additive White Gaussian Noise (AWGN) channel under multi-user scenario.

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Novel Approach of Designing Multiplier-less Finite Impulse Response Filter using Differential Evolution Algorithm

By Abhijit Chandra Sudipta Chattopadhyay

DOI:, Pub. Date: 8 Apr. 2012

Reduction of computational complexity of digital hardware has drawn the special attention of researchers in recent past. Proper emphasis is needed in this regard towards the settlement of computationally efficient as well as functionally competent design of digital systems. In this communication, we have made one novel attempt for designing multiplier-free Finite duration Impulse Response (FIR) digital filter using one robust evolutionary optimization technique, called Differential Evolution (DE). The search has been directed through two sequentially opposite paths which include quantization and optimization as fundamental operations. Besides performing a detailed comparative analysis between these two proposed approaches; the performance evaluation of the designed filter with other existing discrete coefficient FIR models has also been carried out. Finally, the optimum search method for realizing the required set of specifications has been suggested.

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