TWC
2008
13 years 11 months ago
2008
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,...
TWC
2008
13 years 11 months ago
2008
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...
TWC
2008
13 years 11 months ago
2008
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...
TWC
2008
13 years 11 months ago
2008
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...
TWC
2008
13 years 11 months ago
2008
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...
TWC
2008
13 years 11 months ago
2008
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...
TWC
2008
13 years 11 months ago
2008
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...
TWC
2008
13 years 11 months ago
2008
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...
TWC
2008
13 years 11 months ago
2008
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...
TWC
2008
13 years 11 months ago
2008
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...