99 search results - page 3 / 20 » Approximation Hardness and Secure Communication in Broadcast... |
ICC
2007
IEEE
14 years 2 days ago
2007
IEEE
Abstract— We consider multiuser scheduling with limited feedback of partial channel state information in MIMO broadcast channels. By using spatial multiplexing at the base statio...
EUROCRYPT
2003
Springer
13 years 11 months ago
2003
Springer
We introduce captcha, an automated test that humans can pass, but current computer programs can’t pass: any program that has high success over a captcha can be used to solve an u...
ICASSP
2011
IEEE
12 years 9 months ago
2011
IEEE
In this paper, we consider the problem of secret communication through Rayleigh fading single-input multiple-output (SIMO) broadcast channel in the presence of an eavesdropper. At...
MOBIQUITOUS
2007
IEEE
14 years 17 hour ago
2007
IEEE
Abstract— Cooperative transmission is an emerging communication technique that takes advantages of spatial diversity and broadcast natures of wireless channels to improve wireles...
CRYPTO
2006
Springer
13 years 9 months ago
2006
Springer
We present a robust multiparty computation protocol. The protocol is for the cryptographic model with open channels and a polytime adversary, and allows n parties to actively secur...