Indranil Sarkar, Ph.D

Department of Electrical Engineering

332, Bonner Hall

North Campus

State University of New York at Buffalo

Buffalo, NY - 14260

Office ph : (716) 645-2422 ext 2504

Cell : (716) 400-2591

Fax: 716-645-3656

email : isarkar at eng dot buffalo dot edu

Resume

EE 416 : Signal Processing Algorithms.

EE 516 : Digital Signal Processing I.

EAS 305 : Applied Probability and Statistical Inferences.

EE 202 : Circuit Analysis I.

EE 203 : Circuit Analysis II.

EE 483 : Communication Systems I.

EE 303 : Signal Analysis and Transformation Methods

EE 631 : Detection and Estimation

I received the Graduate Student Excellence in Teaching Award (Honorable mention) from the Graduate School, University at Buffalo in 2007.

I worked under Dr. Adly T. Fam. My area of interest is Digital Signal Processing. For my master's thesis I worked on high resolution spectral analysis. My doctoral dissertation is in the area of mismatched filter design for bi-phase and poly-phase codes used for radar, communications and ultrasonic imaging applications.

 It is desirable in various radar and communication applications to have binary and poly-phase codes with small sidelobes in their aperiodic autocorrelation. It is sought to reduce the energy of side-lobes to result in sequences with a good merit factor. The best achievable merit factor for a sequence of length N is still an open question. On the other hand, if it is desired to minimize the peak side-lobe, then the best possible codes are the Barker codes. However, the largest odd length yet realized for a Barker code is 13 and the largest even length is just 4. Even though there is no rigorous proof about the non-existence of Barker codes of greater lengths, published research based on extensive computer simulations indicate that there are no Barker codes of  length upto several thousands.

Even for the longest of the Barker codes, the best mainlobe to peak sidelobe ratio is 13 which is not good enough for many practical applications. Hence, a significant amount of research in the area focuses on designing filters that suppress the sidelobes to maximize the above mentioned ratio. In my doctoral dissertation,  I have proposed efficient and computationally inexpensive sidelobe suppression filters for pulse compression codes. These filters are longer than the existing length-optimal filters but use significantly less hardware for comparable sidelobe suppression. When implemented on VLSI, these filters are also shown to achieve great savings in area and power consumption as compared to the optimal filters.

My other interests include :

•    Polyphase pulse compression codes and their filtering methods.

•   Complementary codes with low individual peak sidelobes.

•   Spectral Analysis

•   Efficient generation and applications of sub-optimal Golomb  Rulers.

•   Similarity measures in Image registration techniques.

•   Stereo vision.

Publications are listed below.

1. "Multiplicative Mismatched Filters for Optimum Range Sidelobe Suppression in Barker Code Reception,"   US  11/559776. (patent pending)

2. “Interlaced Complementary Code Sets Based on Codes with Unity Peak Sidelobes,” US 11/672203. (patent pending)

3. "Efficient Mismatched Filters Based on Sidelobe Inversion," US 60/959155. (patent pending)

Journal:

1. Indranil Sarkar and Adly T. Fam, "The Interlaced Chirp Z Transform," Elsevier Journal of Signal Processing, Volume 86, Issue 9, September 2006, Pages 2221-2232. [pdf]

2. Indranil Sarkar and Manu Bansal, "A Wavelet Based Multi-Resolution Approach to Solve Stereo Correspondence Problem Using Mutual Information,"  IEEE Transactions on Systems, Man and Cybernetics, Part B: Cybernetics, Volume 37, Issue 4, Aug. 2007 Pages: 1009 - 1014. [pdf]

3. Indranil Sarkar and Adly T. Fam, "Multiplicative Mismatched Filters for Sidelobe Suppression in Barker Codes," Accepted for publication in IEEE Transactions on Aerospace and Electronic Systems.

4. Adly T. Fam and Indranil Sarkar, "A New Class of Interlaced Complementary Codes Based on Components with Unity Peak Sidelobes," Accepted for publication in Elsevier Journal of Signal Processing.

Conferences:

1. Indranil Sarkar and Adly T. Fam,  "The Interlaced Chirp Z Transform," Proceedings of the 7th IEEE International Conference on Signal Processing and  Communications (SPCOM 2004),  Indian Institute of Science, Bangalore, 11th - 14th December, 2004, pp. 46 - 50. [pdf]

2. Indranil Sarkar and Raj Sharman, "A Dual Metric Approach towards Similarity Measurement in Image Registration," Proceedings of the IEEE Canadian Conference on Electrical and Computer Engineering, Saskatoon, 1st - 4th May 2005, pp. 959 - 962. [pdf]

3. Manu Bansal and Indranil Sarkar, "Using Mutual Information in a Wavelet Based Hierarchical Approach to Solve Stereo Correspondence Problem," Proceedings of the 2nd International Conference on Artificial Intelligence (IICAI - 05), Pune, 20th - 22nd December 2005, pp. 3194-3206. [pdf]

4. Adly T. Fam and Indranil Sarkar, "Multiplicative Mismatched Filter for Optimum Sidelobe Suppression of Barker Codes," Proceedings of Signal Processing, Sensor Fusion and Target Recognition XV, SPIE Defense and Security Symposium, Vol. 6235, pp 62351M1-62351M10, Orlando, FL. 17th-22nd April, 2006. [pdf]

5. Adly T. Fam, Indranil Sarkar and Khaled Almuhareb, "Academic Dishonesty: A Probabilistic Model Using Markov Chains,"  Proceedings of 2006 ASEE Annual Conference and Exposition, Chicago, IL. June 2006. [pdf]

6. Indranil Sarkar and Adly T. Fam, "Factored Mismatched Filters for Compound Barker Codes," Proceedings of IEEE Radar 2007, pp 541-545, Waltham, MA. April 2007. [pdf]

7. Adly T. Fam, Indranil Sarkar, and Thomas Poonnen, "Computationally Efficient Mismatched Filters Based on Sidelobe Inversion," To be presented at IEEE International Symposium on Signal Processing and Information Technology (ISSPIT 2007), December, 2007, Cairo, Egypt.

8. Adly T. Fam and  Indranil Sarkar, "A New Class of Interlaced Complementary Codes Based on Unity Peak Sidelobes," To be presented at IEEE International Symposium on Signal Processing and Information Technology (ISSPIT 2007), December, 2007, Cairo, Egypt.

My attempts at photography

Buffalo

Kolkata

Salt Lake ... Check this out ! Even Salt Lake has its own website!

Digital Filters

PhD : Piled High and Deeper : The almanac of all PhD students!

Arindam - PhD student in CSE, Northwestern.

Soumya  - Graduate student at CSE, Buffalo.

Rohan - PhD student in EE, Buffalo.