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TSP
2012
12 years 3 months ago
Randomized Isometric Linear-Dispersion Space-Time Block Coding for the DF Relay Channel
This article presents a randomized linear-dispersion space-time block code for decode-andforward synchronous relays. The coding matrices are obtained as a set of columns (or rows)...
David Gregoratti, Walid Hachem, Xavier Mestre
GLOBECOM
2007
IEEE
14 years 2 months ago
Overlapped Alamouti Codes
—In most of the existing space–time code designs, achieving full diversity is based on maximum-likelihood (ML) decoding at the receiver that is usually computationally expensiv...
Yue Shang, Xiang-Gen Xia
ICC
2007
IEEE
120views Communications» more  ICC 2007»
14 years 2 months ago
Multiuser MIMO Downlink Transmission Over Time-Varying Channels
—— The performance of multiuser MIMO downlink systems with block diagonalization (BD) relies on the channel state information (CSI) at the transmitter to a great extent. For ti...
Kai Zhang, Zhisheng Niu
ICASSP
2008
IEEE
14 years 2 months ago
A factor graph approach to joint iterative data detection and channel estimation in pilot-assisted IDMA transmissions
We consider a pilot-assisted interleave-division multiple access (IDMA) system transmitting over block-fading channels. We describe this system in terms of a factor graph and use ...
Clemens Novak, Gerald Matz, Franz Hlawatsch
PET
2007
Springer
14 years 1 months ago
Two-Sided Statistical Disclosure Attack
We introduce a new traffic analysis attack: the Two-sided Statistical Disclosure Attack, that tries to uncover the receivers of messages sent through an anonymizing network support...
George Danezis, Claudia Díaz, Carmela Tronc...