683 search results - page 9 / 137 » Hierarchical spacetime control |
GLOBECOM
2009
IEEE
14 years 2 months ago
2009
IEEE
—A key technology in cooperative communications is distributed space-time coding (DSTC) which achieves spatial diversity gain from multiple relays. A novel DSTC, called randomize...
PST
2004
13 years 8 months ago
2004
This paper presents the first mediated hierarchical identity-based encryption and signature schemes. Both schemes are designed to support information access control in hierarchical...
ISORC
2008
IEEE
14 years 1 months ago
2008
IEEE
In this paper, a Role-based Access Control (RBAC) model is applied and extended to a multimedia version called Multi-Role Based Access Control (MRBAC), which can fully support the...
RTSS
1999
IEEE
13 years 11 months ago
1999
IEEE
ICCS
2007
Springer
14 years 1 months ago
2007
Springer
Abstract. Hierarchical (H)-matrices approximate full or sparse matrices using a hierarchical data sparse format. The corresponding H-matrix arithmetic reduces the time complexity o...