Sreenath Ramanath

Doctorant

Biography

I am from Bangalore, INDIA. I am pursuing my doctorate under the guidance of Prof. Eitan ALTMAN (INRIA) and Prof. Merouane DEBBAH (SUPELEC). I have a Masters from Indian Institute of Science (IISc), Bangalore. In the past, I had been involved in research and development activities in the areas of GPS, Integrated navigation, Voice-band Modems, CDMA, WLAN and WiMAX at ACCORD, ITTIAM and BECEEM. My current research interests span optimization, game theory, wireless networks, communication theory and signal processing. I live near the beautiful fort-town of Avignon in south of France and work from LIA, University of Avignon.

Research activities

I am working on aspects related to Optimization of pico-cell networks. The goal is to develop mathematical models and efficient algorithms for self-optimizing pico-cell networks. The work would consider aspects of capacity, coverage, fairness, mobility, etc., in the backdrop of broadband wireless services based on CDMA, WiMAX or LTE technologies. Initial part of the work has focussed on the following problems. 1) Finding optimal cell sizes which maximizes spatial throughput using fluid models 2) Assigning base station locations to satisfy various fairness criterion under large population limits 3) Analysis of mobility in small cell networks using queuing theory 4) Asymptotic analysis of precoded small cell networks using random matrix theory. 5) Fairness and resource allocation in wireless networks. 6) Decentralized power control algorithms in small cell networks.

Journal (submitted)

• Veeraruna Kavitha, Sreenath Ramanath and Eitan Altman, "Spatial queueing analysis for design and dimensioning of Picocell networks with mobile users", submitted to Performance Evalualuation Journal, Special edition of selected papers from WiOpt 2010.

Papers in conferences & workshops

• Sreenath Ramanath, Veeraruna Kavitha and Eitan Altman, "Impact of mobility on call block, call drops and optimal cell size in small cell networks", Accepted, PIMRC 2010, Workshop on Indoor and Outdoor Femto Cells, Sep 26, Istanbul, Turkey.
• Eitan Altman, Konstantin Avrachenkov and Sreenath Ramanath, "Multiscale fairness and its applications to cellular networks", Accepted,  Performance 2010 (Poster), Nov 17-19, Namur, Belgium.
• Sreenath Ramanath, Veeraruna Kavitha, Eitan Altman, "Spatial queuing analysis of mobility in pico cell networks", Accepted, WiOpt 2010.
• Sreenath Ramanath, Merouane Debbah, Eitan Altman, Vinod Kumar, "Asymptotic analysis of precoded small cell networks", InfoCom 2010, Mar 15-19, San Diego, USA.
• Sreenath Ramanath, Eitan Altman, Vinod Kumar, Merouane Debbah, "Optimizing cell size in pico-cell networks", Invited paper, RAWNET/WCNC-3 Workshop, WiOPT 2009, Jun 27, Seoul, South Korea.
• Sreenath Ramanath, Eitan Altman, Vinod Kumar, Veeraruna Kavitha, Laurent Thomas, "Fair assignment of base stations in cellular networks", 22nd World Wireless Research Forum (WWRF) Conference, May 5-7, 2009, Paris, France.
• Rahul Garg, Roshan Baliga, Sreenath Ramanath, "Sensitivity of OFDM based WLANs to front-end impairments", International Signal Processing Conference 2003, Dallas, Texas.
• Amaranada Reddy, Archana Nayak, Gurucharan, Veeraruna Kavitha, Sreenath Ramanath, "Implementation of a Multi-Channel Baseband CDMA Receiver on a ADSP2189M Processor", International Digital Signal Processing Conference 2001, Boston, MA.

Papers under review

• Sreenath Ramanath, Veeraruna Kavitha and Merouane Debbah, "Satisfying Demands in a Multicellular Network: A Stochastic Approximation based General Distributed Power Allocation Algorithm",  submitted to InfoCom 2011.

• Eitan Altman, Konstantin Avrachenkov and Sreenath Ramanath, "Multiscale fairness and its applications to cellular networks",  submitted to InfoCom 2011

Work in progress

• "Asymptotic analysis of MMSE precoders in small cell networks"
• "Handover design and management for small cell networks"
• "An MDP approach to fairness in cellular networks"
• "Resource allocation in two-tier networks"

PATENTS (granted)

• Method and system for determining a log-likelihood ratio (LLR) corresponding to each bit of a symbol – US 7,684,522

PATENTS (under review)

• Method and apparatus for combining de-interleaving with FFT and demapping – filed in 2005
• Multi processor implementation for signals requiring fast processing – filed in 2005

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LIA, Universite d'Avignon