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SUTC
2006
IEEE
15 years 10 months ago
Transitive Nearest Neighbor Search in Mobile Environments
Given a query point p, typically the position of a current client, and two datasets S and R, a transitive nearest neighbor (TNN) search returns a pair of objects (s, r) ∈ S × R...
Baihua Zheng, Ken C. K. Lee, Wang-Chien Lee
VTC
2006
IEEE
15 years 10 months ago
A Novel Hybrid ARQ Scheme Based on Shift Column Permutation Bit Interleaving for OFDM Systems
—In this paper, a novel hybrid ARQ scheme based on shift column permutation bit interleaving is proposed for OFDM systems. When a packet is requested for retransmission, we can u...
Junwoo Jung, Hyungwon Park, Jaesung Lim
VTC
2006
IEEE
158views Communications» more  VTC 2006»
15 years 10 months ago
An Adaptive-Scaling Algorithm for OFDM PAR Reduction Using Active Constellation Extension
Abstract— The Active Constellation Extension (ACE) technique is a lossless (in terms of throughput) Peak-to-Average Power Ratio (PAR) reduction technique that adaptively extends ...
Luqing Wang, Chintha Tellambura
VALUETOOLS
2006
ACM
162views Hardware» more  VALUETOOLS 2006»
15 years 10 months ago
Using UML state machines and petri nets for the quantitative investigation of ETCS
This paper proposes the modeling of technical systems and their behavior by means of Unified Modeling Language (UML) State Machines and the extending UML Profile for Schedulabil...
Jan Trowitzsch, Armin Zimmermann
INFOCOM
2005
IEEE
15 years 9 months ago
GPS free coordinate assignment and routing in wireless sensor networks
— In this paper we consider the problem of constructing a coordinate system in a sensor network where location information is not available. To this purpose we introduce the Virt...
Antonio Caruso, Stefano Chessa, Swades De, A. Urpi