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TWC
2008
133views more  TWC 2008»
9 years 11 months ago
Beam Selection Strategies for Orthogonal Random Beamforming in Sparse Networks
Abstract--Orthogonal random beamforming (ORB) constitutes a mean to exploit spatial multiplexing and multi-user diversity (MUD) gains in multi-antenna broadcast channels. To do so,...
José López Vicario, Roberto Bosisio,...
TWC
2008
129views more  TWC 2008»
9 years 11 months ago
Lifetime maximization for amplify-and-forward cooperative networks
Power allocation strategies are devised to maximize the network lifetime of amplify-and-forward (AF) cooperative networks in this work. We consider the scenario where one source an...
Wan-Jen Huang, Yao-Win Peter Hong, C. C. Jay Kuo
TWC
2008
111views more  TWC 2008»
9 years 11 months ago
Closed-Form Exact BER and Optimization of Generalized Orthogonal STBCs
Abstract--The closed-form exact bit error rate (BER) expressions of generalized orthogonal space-time block codes (OSTBCs) are first derived for quadrature amplitude modulation (QA...
Il-Min Kim, Dongwoo Kim
TWC
2008
159views more  TWC 2008»
9 years 11 months ago
Hierarchical Space-Time Block Code Recognition Using Correlation Matrices
The blind recognition of communication parameters is a key research issue for commercial and military communication systems. The results of numerous investigations about symbol tim...
Vincent Choqueuse, Koffi Yao, Ludovic Collin, Gill...
TWC
2008
112views more  TWC 2008»
9 years 11 months ago
Design and Analysis of Cross-Layer Tree Algorithms for Wireless Random Access
In this paper, we develop a random access scheme which combines the widely used binary exponential backoff (BEB) algorithm with a cross-layer tree algorithm (TA) that relies on suc...
Xin Wang, Yingqun Yu, Georgios B. Giannakis
TWC
2008
123views more  TWC 2008»
9 years 11 months ago
Block diagonal geometric mean decomposition (BD-GMD) for MIMO broadcast channels
In recent years, the research on multiple-input multiple-output (MIMO) broadcast channels has attracted much interest, especially since the discovery of the broadcast channel capac...
Shaowei Lin, Winston W. L. Ho, Ying-Chang Liang
TWC
2008
154views more  TWC 2008»
9 years 11 months ago
TUA: A Novel Compromise-Resilient Authentication Architecture for Wireless Mesh Networks
User authentication is essential in service-oriented communication networks to identify and reject any unauthorized network access. The state-of-the-art practice in securing wirele...
Xiaodong Lin, Rongxing Lu, Pin-Han Ho, Xuemin Shen...
TWC
2008
137views more  TWC 2008»
9 years 11 months ago
Ml joint CFO and channel estimation in OFDM systems with timing ambiguity
This letter addresses the problem of joint estimation of carrier frequency offset (CFO) and channel for OFDM systems in the presence of timing ambiguity. Based on two signal models...
Jianwu Chen, Yik-Chung Wu, Shaodan Ma, Tung-Sang N...
TWC
2008
76views more  TWC 2008»
9 years 11 months ago
High Resolution 3-D Angle of Arrival Determination for Indoor UWB Multipath Propagation
Propagation measurements using a large array are used to study the angle of arrival (AOA) across the ultrawideband (UWB) frequency range of 3.1 to 10.6 GHz. A two-dimensional Unita...
Yongwei Zhang, Anthony K. Brown, Wasim Q. Malik, D...
TWC
2008
129views more  TWC 2008»
9 years 11 months ago
An Efficient Mobile Authentication Scheme for Wireless Networks
In this paper, an efficient authentication scheme is proposed which is suitable for low-power mobile devices. It uses an elliptic-curve-cryptosystem based trust delegation mechanis...
Caimu Tang, Dapeng Oliver Wu
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