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JCM
2008
100views more  JCM 2008»
15 years 6 months ago
Four Transmit Diversity Schemes for Coded OFDM Systems with Four Transmit Antennas
We compare four open-loop transmit diversity schemes in a coded Orthogonal Frequency Division Multiplexing (OFDM) system with four transmit antennas, namely cyclic shift diversity ...
Chau Yuen, Yan Wu, Sumei Sun
JSAC
2006
95views more  JSAC 2006»
15 years 6 months ago
A low-rate code-spread and chip-interleaved time-hopping UWB system
We consider a code-spread and chip-interleaved time-hopping (TH) multiple-access scheme for multiuser ultra-wideband (UWB) communications. In such a system, each user's chip s...
Kai Li, Xiaodong Wang, Guosen Yue, Li Ping
JUCS
2006
101views more  JUCS 2006»
15 years 6 months ago
DS/CDMA Multiuser Detection with Evolutionary Algorithms
This work analyses two heuristic algorithms based on the genetic evolution theory applied to direct sequence code division multiple access (DS/CDMA) communication systems. For diff...
Fernando Ciriaco, Taufik Abrão, Paul Jean E...
TKDE
2008
103views more  TKDE 2008»
15 years 6 months ago
Detecting Word Substitutions in Text
Searching for words on a watchlist is one way in which large-scale surveillance of communication can be done, for example, in intelligence and counterterrorism settings. One obviou...
SzeWang Fong, Dmitri Roussinov, David B. Skillicor...
AAMAS
2004
Springer
15 years 6 months ago
Multi-Dimensional, MultiStep Negotiation
We present a multi-dimensional, multi-step negotiation mechanism for task allocation among cooperative agents based on distributed search. This mechanism uses marginal utility gai...
Xiaoqin Zhang, Victor R. Lesser, Rodion M. Podoroz...