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It is assumed that stability and maintainability are relating to each other. We attempt to verify and validate this assumption in object-oriented paradigm. Two candidate metrics were chosen, one for stability and one for maintainability. CSM is used in stability due to its high accuracy and wide coverage. MI was chosen for maintainability due to its clarity, ease of use and solely based on source...
Automated vehicle researches move on to the public road experiments. This study focuses on a traffic signal detection based on mono-camera, predefined map database and accurate vehicle pose which is estimated by a localization module. By using the map data and the vehicle pose, an image ROI (Region-Of-Interest) can be calculated. This paper handles a situation with multiple signals appeared in an...
Coordinated Multi-Point (CoMP) Multiple Input Multiple Output (MIMO) transmission improves user's coverage and data throughput particularly on the cell edges. To make full advantage of CoMP, radio planning tools need very accurate models that fully capture the MIMO channels characteristics. This paper presents detailed modeling and analysis of an uplink CoMP system using Ray-Tracing (RT)-based channel...
Coordinated Multi-Point (CoMP) detection and transmission promises great improvements in cellular network coverage and throughput. To make full advantage of CoMP, however, appropriate radio planning is required that considers decoding of UEs at clusters of multiple BSs. Therefore, planning tools need accurate models that capture multi-cell propagation characteristics. This paper presents the analysis...
In oil reservoirs about 40% of the original oil in place is produced and the rest remains as residual oil after primary and secondary oil recovery due to geological and physical factors. Additional oil can be mobilized by applying some improved oil recovery methods. However, there is no universal IOR method to be implemented in any reservoir. Efforts are made to develop IOR methods with lower risk...
This paper presents verifications for UMTS coverage and capacity in a live network using planning and performance tools applied to a real-world operational UMTS network. Case study results are presented and followed by comparisons between coverage predictions, capacity simulations, field measurements and system statistics. Tuned propagation models based on area clutter, population profiles, digital...
The benefits of horizontal beamforming in cellular networks are well unterstood, and the technology is already used in commercial products. Recently, vertical beamforming (basically a user specific downtilt (DT)) receives a lot of attention as well. However, available channel models do not allow for an accurate simulation of this transmission scheme. This publication investigates the impact of antenna...
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