Today, 84% of all reported global cellular subscribers make calls via radio access technology specifi ed by the Third Generation Partnership Project (3GPP). This signifi es that WCDMA is the predominant thirdgeneration (3G) radio network technology, and as such, represents a substantial economy of scale. In addition, the recent introduction of high-speed packet access (HSPA, 3GPP Release 6) has...

This paper compares two implementations of reconfigurable and high-throughput turbo decoders. The first implementation is optimized for an NVIDIA Kepler graphics processing unit (GPU), whereas the second implementation is for an Intel Ivy Bridge processor. Both implementations support max-log-MAP and log-MAP turbo decoding algorithms, various code rates, different interleaver types, and all blo...

In the near future, an increase in cellular network density is expected to be one of the main enablers to boost the system capacity. This development will lead to an increase in the network energy consumption. In this context, we propose an energy efficient dynamic scheme for HSDPA+ (High Speed Downlink Packet AccessAdvanced) systems aggregating several carriers and which adapts dynamically to ...

In this paper, we propose an iterative interstream interference cancellation technique for system with frequency selective multiple input multiple output (MIMO) channel. Our method is inspired by the fact that the cancellation of the interstream interference can be regarded as a reduction in the magnitude of the interfering channel. We show that, as iteration goes on, the channel experienced by...

This paper presents a novel methodology for quality evaluation of streaming video data services. The methodology requires no reference and it predicts subjective experience of the video quality. The predictions are based on a nonlinear mapping between objective technical metrics collected by the user equipment and subjective scores given by human evaluators. The objective metrics may be taken f...

BACKGROUND Analysis of the evolutionary dynamics of Helicobacter pylori allowed tracing the spread of infection through populations on different continents but transmission pathways between individual humans have not been clearly described. MATERIALS AND METHODS To investigate person-to-person transmission, we studied three families each including one child with persistence of symptoms after ...

The rapid evolution of wireless networking technologies has opened up new possibilities for wireless delivery of multimedia services and content. In addition to the standardization efforts of 3GPP and 3GPP2 on third generation mobile networks, new broadband wireless access technologies such as WLANs, WiMAX, Flash-OFDM, and DVB-H are emerging as alternative means to provide services to mobile us...

BACKGROUND Photosystem II (PSII) is the most thermally sensitive component of photosynthesis. Thermal acclimation of this complex activity is likely to be critically important to the ability of photosynthetic organisms to tolerate temperature changes in the environment. METHODOLOGY/FINDINGS We have analysed gene expression using whole-genome microarrays and monitored alterations in physiology...