Workshop on BAN Technology and Applications WPI, Worcester, MA CWINS Channel Characterization for RF Localization Inside Human Body Kaveh Pahlavan June.

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Presentation transcript:

Workshop on BAN Technology and Applications WPI, Worcester, MA CWINS Channel Characterization for RF Localization Inside Human Body Kaveh Pahlavan June 20, 2011©KP

Overview of CWINS Program on BAN Current Project: RF Propagation 1Measurement and Modeling for Wireless Body Area Networks – Sponsored by NIST Staff and Students at the CWINS Lab: –Kaveh Pahlavan –Allan H. Levesque (research scientist) –Kaveh Ghaboosi (Post Doc) –Reza Zekavat (visiting professor) –Ning Yang (affiliated research scientist) –Yunxing Ye, Fardad Askarzadeh (PhD) –Umair Khan, Ruijun Fu, Shen Li, Pranay Swary (MS) –Monir Islam (UG) Staff and Student at the Antenna Lab: –Sergey Makarov –Gregory M. Noetscher, Yang Xu (MS) –Ishrak Khair (UG)

Innovations starts with science fictions and a technical challenge! How can we localize the capsule using RF signal?

Performance evaluation needs channel models [1] M. A. Assad, A Real-Time Laboratory Testbed for Evaluating Localization Performance of WIFI RFID Technologies, MS Thesis, CWINS, WPI, 2007 [2] L. T. Metreaud, An RF-Isolated Real-Time Multipath Testbed for Performance Analysis of WLANs, MS Thesis, CWINS, WPI, 2006 [3] M. Heidari, A Testbed for Real-time Performance Evaluation of Indoor Geolocation Systems in Laboratory Environment, MS Thesis, CWINS, WPI, 2005

Implant device Body mounted device Body base station External access point Internet Channel for in-body localization Implant to implant Implant to surface Implant to external Surface to surface LOS Surface to surface NLOS Surface to external LOS Surface to external NLOS Channel Models for - RSS-based systems [4] - TOA-based systems [NA] [4] Kamran Sayrafian-Pour,,Wen-Bin Yang, J. Hagedorn, J. Terrill, J. ; Kamya Yazdandoost, "A statistical path loss model for medical implant communication channels," Personal, Indoor and Mobile Radio Communications, 2009 IEEE 20th International Symposium on, vol., no., pp , Sept

Current research topics at CWINS –What are the bounds on ranging error for RSS-based localization? –What is the effect of non- homogeneousity of human body on TOA ranging? –What are the effects of body motions? –How can we measure inside human body? [5] Kaveh Pahlavan, Yunxing Ye, Umair Khan and Ruijun Fu “. RF Localization Inside Human Body Enabling micro-robotic navigation for medical applications,” International Conference on Localization and GNSS (ICL-GNSS2011), Tampere, Finland, June 29-30, 2011.

RSS-Based Localization for Capsule Endoscopy Implant to Body SurfaceLp(d 0 )ασ dB Deep Tissue Near Surface [6]Yunxing Ye, Umair Khan, Ruijun Fu and Kaveh Pahlavan. “On the accuracy of RF positioning in multi-capsule endoscopy” 22nd Annual IEEE international symposium on personal, indoor and mobile radio communications PIMRC 2011, Septembre, Toronto, Canada. [4] [6]

Performance for capsule endoscopy [6]Yunxing Ye, Umair Khan, Ruijun Fu and Kaveh Pahlavan. “On the accuracy of RF positioning in multi capsule endoscopy” 22nd Annual IEEE international symposium on personal, indoor and mobile radio communications PIMRC 2011, September, Toronto, Canada.

Effects of non-homogeneousity [7] Yunxing Ye, Umair Khan and Kaveh Pahlavan “Performance bounds for TOA based RF positioning for implant communication” 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC '11), Boston. August 30 th – September 3 rd 2011.

Effects of human motions (a) No motion (b) Stand Still (c) Walk (d) Jog [8] Ruijun Fu, Yunxing Ye, Kaveh Pahlavan and Ning Yang, "Doppler Spread Analysis of Human Motions for Body Area Network Applications" 22nd Annual IEEE international symposium on personal, indoor and mobile radio communications PIMRC 2011, September, Toronto, Canada.

Measurement program Hollow Phantom in the Chamber Phantom Phil with Bones and Organs Using human subject

Challenges in computer simulations [9] Sergey N. Makarov, Umair I. Khan, Md. Monirul Islam, Reinhold Ludwig, Kaveh Pahlavan “On Accuracy of Simple FDTD Models for the Simulation of Human Body Path Loss”, presented at the 2011 IEEE Sensor Application Symposium, San Antonio, TX, February 22-24, 2011 [10] Umair I. Khan, Kaveh Pahlavan, Sergey Makarov “Comparison of TOA and RSS Based Techniques for RF Localization inside Human Tissue”, 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC '11), Boston. August 30 th – September 3 rd 2011.