Sciweavers

TWC
2010
13 years 2 months ago
Rex: A randomized EXclusive region based scheduling scheme for mmWave WPANs with directional antenna
Millimeter-wave (mmWave) transmissions are promising technologies for high data rate (multi-Gbps) Wireless Personal Area Networks (WPANs). In this paper, we first introduce the con...
Lin X. Cai, Lin Cai, Xuemin Shen, Jon W. Mark
TWC
2010
13 years 2 months ago
On overloaded vector precoding for single-user MIMO channels
We address the possibility of overloaded vector precoding in single user MIMO channels, i.e. the number of data streams is larger than the minimum of the number of antennas at tran...
R. De Miguel, Vesna Gardasevic, Ralf R. Mülle...
TWC
2010
13 years 2 months ago
Delay-Minimal Transmission for Average Power Constrained Multi-Access Communications
We investigate the problem of minimizing the overall transmission delay of packets in a multi-access wireless communication system, where the transmitters have average power constr...
Jing Yang, Sennur Ulukus
TWC
2010
13 years 2 months ago
Outage Probability Analysis of Cognitive Transmissions: Impact of Spectrum Sensing Overhead
In cognitive radio networks, a cognitive source node requires two essential phases to complete a cognitive transmission process: the phase of spectrum sensing with a certain time d...
YuLong Zou, Yu-Dong Yao, Baoyu Zheng
TWC
2010
13 years 2 months ago
Delay-tolerant decode-and-forward based cooperative communication over Ricean channels
In this paper, we propose a TDMA based simple transmission scheme, which overcomes the effect of the delays caused by the poor synchronization of the relaying nodes over Ricean ch...
Manav R. Bhatnagar, Are Hjørungnes, M&eacut...
TWC
2010
13 years 2 months ago
A framework for statistical wireless spectrum occupancy modeling
Abstract--In this paper, we propose a novel spectrum occupancy model designed to generate accurate temporal and frequency behavior of various wireless transmissions. Our proposed w...
Chittabrata Ghosh, Srikanth Pagadarai, Dharma P. A...
TWC
2010
13 years 2 months ago
Transmit diversity vs. spatial multiplexing in modern MIMO systems
A contemporary perspective on transmit antenna diversity and spatial multiplexing is provided. It is argued that, in the context of most modern wireless systems and for the operati...
A. Lozano, N. Jindal
TWC
2010
13 years 2 months ago
Sharp thresholds for relative neighborhood graphs in wireless Ad Hoc networks
In wireless ad hoc networks, relative neighborhood graphs (RNGs) are widely used for topology control. If every node has the same transmission radius, then an RNG can be locally co...
Chih-Wei Yi, Peng-Jun Wan, Lixin Wang, Chao-Min Su
TWC
2010
13 years 2 months ago
Credit pre-reservation mechanism for UMTS prepaid service
Online Charging System (OCS) supports multiple prepaid and postpaid sessions simultaneously. Through credit reservation, the OCS assigns some credit units to a session. These credi...
Hsin-Yi Lee, Yi-Bing Lin
TWC
2010
13 years 2 months ago
On the distribution of instantaneous power in single-carrier signals
Abstract-- This paper studies a statistical distribution of instantaneous power in pulse-shaped single-carrier (SC) modulation. Such knowledge is of significant importance to estim...
Makoto Tanahashi, Hideki Ochiai