Indoor Localization via Channel Response

PhD Qualifying Examination


Title: "Indoor Localization via Channel Response"

by

Mr. Zimu ZHOU


Abstract:

The spatial features of emitted wireless signals are the basis of location
distinction and determination for wireless indoor localization. Available
in mainstream wireless technologies, Received Signal Strength Indicator
(RSSI) has been adopted in a great number of indoor localization systems,
however, it suffers from dramatic performance degradation in complex
situations due to multipath fading and temporal dynamics.

Breaking-through techniques resort to finer-grained wireless channel
measurement than RSSI. Different from RSSI, the PHY layer power feature,
channel response, is able to discriminate multipath characteristics, thus
holds the potential of the convergence of accurate and pervasive indoor
localization. Channel State Information (CSI, reflecting channel response
in 802.11 a/g/n) has attracted many research efforts and some pioneer
works have demonstrated sub-meter or even centimeter level accuracy. In
this article, we survey this new trend of channel response in
localization. The differences between CSI and RSSI are highlighted with
respect to network layering, time resolution, frequency resolution,
stability, and accessibility. Furthermore, we investigate a large body of
recent works and classify them overall into three categories according to
how to use CSI. For each category, we emphasize the basic principles and
address future directions of research in this new and largely open areas.


Date:                   Tuesday, 8 January 2013

Time:                   10:00am - 12:00noon

Venue:                  Room 3494
                         lifts 25/26

Committee Members:	Dr. Yunhao Liu (Supervisor)
                         Dr. Ke Yi (Chairperson)
 			Dr. Gary Chan
 			Dr. Kai Chen


**** ALL are Welcome ****