702 search results - page 65 / 141 » Low-fidelity location based information systems |
TCOM
2008
13 years 7 months ago
2008
Abstract--This paper addresses the problem of joint optimization of transmit beamforming and space-frequency (SF) coding for MIMO-OFDM systems with spatial correlation feedback in ...
CISS
2007
IEEE
14 years 2 months ago
2007
IEEE
— We propose an expectation-maximization (EM) technique for locating multiple transmitters based on power levels observed by a set of arbitrarily-placed receivers. Multiple trans...
PERCOM
2007
ACM
14 years 7 months ago
2007
ACM
: Global positioning systems (GPS) and mobile phone networks are making it possible to track individual users with an increasing accuracy. It is natural to ask whether one can use ...
LOCA
2009
Springer
14 years 2 months ago
2009
Springer
Outdoor location-based services are now prevalent due to advances in mobile technology and GPS. Indoors, however, even coarse location remains unavailable. Bluetooth has been ident...
AICCSA
2007
IEEE
13 years 11 months ago
2007
IEEE
Location Based Services (LBSs) provide personalized services to the subscribers based on their current position using Global Navigation Satellite System (GNSS), Geographic Informa...