Dr. Neelesh B. Mehta

ECE Dept., Indian Institute of Science (IISc)


I finished my Bachelor of Technology degree in Electronics and Communications Engineering from the Indian Institute of Technology (IIT), Madras, India in 1996. I received my MS and PhD degrees in Electrical Engineering from the California Institute of Technology (Caltech), Pasadena, CA, USA in 1997 and 2001, respectively. I was also a visiting graduate student researcher in the Electrical Engineering department of Stanford University, Stanford, CA, USA in 1999 and 2000. Link adaptation in Enhanced GPRS (EDGE) cellular systems and performance analysis of hybrid voice/data multiple access protocols were the topics covered in my PhD thesis.

After finishing my PhD, I was a Member of Technical Staff in the Wireless Systems Division in AT&T Research Labs, Middletown, NJ, USA from 2001 to 2002. At AT&T, my research work focused on third generation wideband CDMA (WCDMA) systems, and involved both physical layer analysis and system-level performance evaluation of WCDMA downlinks.

In 2002 and 2003, I was a Staff Scientist in the Mobile Communications Unit of
Broadcom Corp., Matawan, NJ, USA. There, I had hands-on experience in developing, integrating, and testing the GSM/GPRS/EDGE standards' protocol stacks in commercially successful chipsets for mobile handsets.

From 2003 to 2007, I was a Principal Research Scientist in Mitsubishi Electric Research Labs (MERL), Cambridge, MA, USA. At MERL, I was the project leader for MERL's 3GPP physical layer standardization effort, and worked on developing and pushing new technologies in next generation cellular systems such as HSDPA (high speed packet data access) and LTE (long term evolution). In addition, I was also actively involved in research on cooperative communication systems, antenna selection and MIMO systems, multiple access protocols, and some WiMax issues.

I have been an Assistant Professor in the Electrical Communication Engineering (ECE) department at the Indian Institute of Science (IISc), Bangalore since 2007. Research work thus far at IISc has focused on wireless communication and networks topics such as antenna selection, performance analysis of LTE and next generation wireless systems, cooperative communication mechanisms and queued cooperation, and interference modeling. We also have started long term projects on energy harvesting wireless sensor networks and cognitive radio for airplane environments.



 California Institute of Technology, Pasadena, CA, USA (2001)

PhD in Electrical Engineering

 Stanford University, Stanford, CA, USA (1999-2000)

Visiting Graduate Student Researcher

 California Institute of Technology, Pasadena, CA, USA (1997)

MS in Electrical Engineering

 Indian Institute of Technology (IIT), Madras, India (1996)

B. Tech. in Electronics & Communications Eng.


Professional Activities

 On the editorial board of IEEE Transactions on Wireless Communications.

 Serving/served on TPCs of Globecom 2009, VTC 2009 (Spring), WISARD 2009, WCNC 2009, Globecom 2008, WCNC 2008, Globecom 2007, and VTC 2007 (Spring)

 TPC track co-chair for:

 WISARD 2010 workshop (co-organized with COMSNETS 2010, Bangalore, India).

 Transmission technologies track of VTC 2009 (Fall), Anchorage, USA.

 Frontiers of Networking and Communications symposium of Chinacomm 2008, Huangzhou, China.

 Reviewer for several communications conferences such as ICC, Globecom, PIMRC, NCC, VTC, and WCNC.

 Reviewer for IEEE Transactions on Wireless Communications, IEEE Transactions on Communications, IEEE Transactions on Signal Processing, IEEE Journal on Selected Areas in Communications, IEEE Transactions on Vehicular Technology, IEEE Transactions on Information Theory, EURASIP Journal, IEEE Communications Letters, IEEE Communications Magazine, etc.

 Senior member of IEEE

 Executive committee member of IEEE Signal Processing Society, Bangalore, India


Employment/Research Experience Before Joining IISc


Principal Research Scientist at Mitsubishi Electric Research Labs. (MERL) (2003-2007)

Location: Cambridge, MA, USA

 Project leader for Beyond 3G R&D strategic project. Developed novel technologies and IPR for next generation wireless standards and mobile communication products, with focus on 3GPP technologies.

 Mentor and collaborator for eight PhD/MS interns from several US universities.

 Active participant and contributor to physical layer discussions (RAN working group 1) third generation partnership project (3GPP) standards. Led team that developed in-house WCDMA system-level MIMO simulator and a full spatial channel model (SCM) implementation. Led uplink-related research and simulator development for 3GPP Long Term Evolution (LTE) standards.

 Pursued novel research on antenna selection and its enabling mechanisms, e.g., signaling & verification algorithms in error-prone feedback, RF pre-processing to outperform selection, and low overhead training methods.

 Engaged in exciting cross-layer research in cooperative communications, e.g., relay selection for cooperative beamforming, cooperative routing algorithms, rateless codes for relay networks, progressive energy-accumulative routing, and base station cooperation.

 Developed techniques for analyzing spectral efficiency of general interference-limited cellular systems with channel-aware schedulers. As a by-product, developed a novel, flexible lognormal sum approximation technique for cellular interference modeling (with applications to financial modeling).


Staff Scientist at Broadcom Corp. (Mobile Communications Unit) (2002-2003)

Location: Matawan, NJ, USA

 Hands-on experience developing and integrating the GSM/GPRS/EDGE standards' protocol stack (e.g., PHY, MAC, RLC, SNDCP layers) in commercially successful chipsets for mobile handsets.

 Developed a suite of PERL-based tools and tests for continuous and automatic internal regression checking of physical layer and protocol stack - a key aspect of complex system integration.

 Involved in exhaustive testing and debugging of mobile handset products in inter-operability testing labs in Europe and USA, and in-house pre-certification test equipment. Traveled extensively in US and Europe to test (and debug) handset prototypes in global wireless networks.


Senior Technical Staff Member at AT&T Research Labs. (Wireless Systems Division) (2001-2002)

Location: Middletown, NJ, USA

 Successfully developed a comprehensive analysis of the orthogonality factor, which models loss of spreading code orthogonality due to multipath dispersion in WCDMA downlinks. Also, developed a useful simple approximation that captures the OF's fundamental dependence on channel profile.

 Part of a team that significantly improved an in-house WCDMA simulator, to study system-level performance of WCDMA downlinks. Implemented simulation engine for the state-of-the-art comprehensiveCOST259 system-level MIMO channel model then possessed by few companies worldwide. As a by product, developed a general empirical model for the behavior of the orthogonality factor in various macrocellular deployments.

 Published novel research results on interplay between fast channel-aware multi-user schedulers and multipath channel diversity.


About Myself