Sciweavers

PIMRC
2008
IEEE
14 years 6 months ago
Double Hopping: A new approach for Dynamic Frequency Hopping in Cognitive Radio networks
—One of the major challenges in designing cellular Cognitive Radio (CR) networks is the avoidance of Secondary User (SU) interference to so called Primary Users (PUs) operating i...
Daniel Willkomm, Mathias Bohge, Daniel Hollos, Jam...
PIMRC
2008
IEEE
14 years 6 months ago
On colliding first messages in slotted ALOHA
Christian Bettstetter, Günther Brandner, Robe...
PIMRC
2008
IEEE
14 years 6 months ago
The limits of theory: Pragmatic challenges in mobile ad hoc systems
—The development of mobile ad hoc systems have considerably emphasized the need for a better understanding of the factors that influence the systems’ performance, i.e., mobili...
Franck Legendre, Martin May, Vincent Lenders, Gunn...
PIMRC
2008
IEEE
14 years 6 months ago
Beamforming matrix quantization with variable feedback rate
: We propose an improved beamforming matrix compression by Givens Rotation with the use of variable feedback rate. The variable feedback rate means that the number of bits used to ...
Chau Yuen, Sumei Sun, Mel Meau Shin Ho
PIMRC
2008
IEEE
14 years 6 months ago
Radio-Triggered Wake-ups with Addressing Capabilities for extremely low power sensor network applications
Sensor network applications are generally characterized by long idle durations and intermittent communication patterns. The traffic loads are typically so low that overall idle d...
Junaid Ansari, Dmitry Pankin, Petri Mähö...
PIMRC
2008
IEEE
14 years 6 months ago
Design challenges of open spectrum access
Abstract—The use of licensed spectrum for wireless communication is driven by the need to control interference between different operators. However, with this mode of regulation,...
Konstantinos V. Katsaros, Pantelis A. Frangoudis, ...
PIMRC
2008
IEEE
14 years 6 months ago
The Wireless Engset Multi-Rate Loss Model for the Handoff traffic analysis in W-CDMA networks
—The call-level performance modelling and evaluation of 3G cellular networks is important for the proper network dimensioning and efficient use of the network resources, such as ...
Vassilios G. Vassilakis, Michael D. Logothetis
PIMRC
2008
IEEE
14 years 6 months ago
On backhaul-constrained multi-cell cooperative detection based on superposition coding
Abstract— A continuously increasing demand for higher spectral efficiencies in mobile communications will require next generation cellular systems to employ a very dense reuse o...
Patrick Marsch, Gerhard Fettweis
PIMRC
2008
IEEE
14 years 6 months ago
Carrier frequency dependent throughput analysis for impaired OFDM links under user mobility
—In this paper we present an analytical approach to evaluate the M-QAM bit error rate and carrier frequency dependent throughput of OFDM systems subject to various receiver impai...
Marco Krondorf, Gerhard Fettweis
PIMRC
2008
IEEE
14 years 6 months ago
Performance of VoIP services over 3GPP WCDMA networks
We analyze the performance ofvoice services over 3GPP WCDMA Networks for Release 99 and Release 7 deployments. We show, by using simulations, that the system capacity of Release 7 ...
Ozcan Ozturk, Vinay Chande, Haitong Sun, Mehmet Ya...