Cooperative Localization

The problem of cooperative localization entails answering the following question, “Given a set of N points in a k-dimensional metric space and their corresponding pairwise distance/proximity measurements, can we find a conformation or relative positions of the points that satisfy these pairwise measurements?”. The problem is of significant interest in varied application areas such as sensor networks, transportation systems, multimedia processing, robotics, biology, non-linear dimensionality reduction etc. Our current research is largely focused on the theoretical, algorithmic and practical aspects of this problem.

Collaborative High Accuracy Localization for Intelligent Transportation Systems

High accuracy localization for precise localization of vehicles in multipath environments is of significant interest for critical safety applications. Our research focuses on robust peer-to-peer localization algorithms in multipath environments under bandwidth constraints. The U.S Department of Transportation recently recognized our work by selecting us as one of the six winners of the U.S. DoT Connected Vehicle Technology Challenge. Relevant references are conferences papers 2, 3, 4, 5 and technical reports 1, 2. This is joint work with Prof. Raja Sengupta.

Multimodal Location Estimation for consumer generated multimedia content

High Accuracy 3D Localization in Mobile Multipath Environments using RFID Supertags

Relevant reference is our recent conference submission 1.

Convex Relaxations for Localization

Publications

Venkatesan Ekambaram, Kannan Ramchandran, “High-accuracy 3D Localization in Mobile Multipath Environments using RFID Supertags”, IEEE PLANS 2012 (accepted).
Venkatesan Ekambaram, Kannan Ramchandran and Raja Sengupta “Scaling Laws for Cooperative Node Localization in Non-Line-of-Sight Wireless Networks”, IEEE Globecom 2011, Houston, Texas. pdf slides
Venkatesan Ekambaram, Christian Manasseh, Adam Goodliss, Raja Sengupta, Kannan Ramchandran, “A Systems Approach to Sizing of Co-operative High-Accuracy Location (C-HALO) Services Validated by Experiments in San Francisco”, ION GNSS 2011, Portland, Oregon. pdf slides
Adam Goodliss, Christian Manasseh, Venkatesan Ekambaram, Raja Sengupta, Kannan Ramchandran, “Cooperative High-Accuracy Location (C-HALO) Service for Intelligent Transportation Systems: A Cost Benefit Study”, ION GNSS 2011, Portland, Oregon. pdf slides
Venkatesan Ekambaram, Kannan Ramchandran,“Distributed High Accuracy Peer-to-Peer Localization in Mobile Multipath Environments”, IEEE Globecom 2010, Miami, Florida. pdf slides

Technical reports

Adam Goodliss, Chrisitian Manasseh, Venkatesan Ekambaram, Raja Sengupta, Adib Kanafani, Kannan Ramchandran, “High Accuracy Location Based Services Cost Benefit Study: Final Report”, ITS Department, University of California, Berkeley, Tech. Rep. UCB-ITS-RR-2011-1, May 2011
Venkatesan Ekambaram, Kannan Ramchandran and Raja Sengupta “Scaling Laws for Cooperative Node Localization in Non-Line-of-Sight Wireless Networks”, EECS Department, University of California, Berkeley, Tech. Rep. UCB/EECS-2011-20, Mar 2011. pdf