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VTC
2006
IEEE
124views Communications» more  VTC 2006»
16 years 1 days ago
Accurate BER Analysis of QPSK Modulated Asynchronous DS-CDMA Systems Communicating over Rayleigh Channels
Abstract— The accurate average BER calculation of an asynchronous DS-CDMA system using random spreading sequences is studied in Rayleigh fading channels. An accurate closedform e...
Xiang Liu, Lajos Hanzo
INFOSCALE
2006
ACM
16 years 4 hour ago
Automated ontology evolution in a multi-agent system
This research addresses the formation of new concepts and their corresponding ontology in a multiagent system where individual autonomous agents try to learn new concepts by consu...
Mohsen Afsharchi, Behrouz H. Far
CIMCA
2005
IEEE
15 years 11 months ago
Ant Colony System for Optimizing Vehicle Routing Problem with Time Windows
Research on the optimization of Vehicle Routing Problem with Time Windows (VRPTW) is a significant investigation area of ant colony system (ACS). This paper proposes an enhanced AC...
Xuan Tan, Xuyao Luo, W. N. Chen, Jun Zhang
AWIC
2005
Springer
15 years 11 months ago
Towards a Multilingual QA System Based on the Web Data Redundancy
This paper explores the feasibility of a multilingual question answering approach based on the Web redundancy. The paper introduces a system prototype that combines a translation m...
Rita M. Aceves-Pérez, Luis Villaseño...
DISCEX
2003
IEEE
15 years 11 months ago
Scaling Secure Group Communication Systems: Beyond Peer-to-Peer
This paper proposes several integrated security architecture designs for client-server group communication systems. In an integrated architecture, security services are implemente...
Yair Amir, Cristina Nita-Rotaru, Jonathan Robert S...