Robert Dady's scientific contributions
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Publications (7)
In this paper, we would like to present our results of combining the ray methods and FDTD for official environment. For the optimal combination, we have determined several parameters accordingly by minimal calculation electrical field level can be calculated in a good resolution around the receiver. Our simulation environment has been developed for...
In this article, we would like to present our results on channel capacity maximiza-tion by indoor environment. In this simulation, we investigated a 3 × 3 indoor MIMO (Multiple-Input Multiple-Output) antenna system. By the used indoor model, we could perfectly describe the office environment. The model statistically describes the material, surface...
The paper presents an overview of the development of Circular Yagi-Uda and the collinear type of antenna. The genetic algorithm is used to optimize the two antenna architecture. The main goal of the article is a comparison of the directivity and bandwidth of the two omnidirectional types of antennas. In our analysis, the method of moments (MoM) is...
This article presents our simulation results of a MIMO (Multiple Input Multiple Output) antenna systems for channel capacity maximization by correlation coefficient between antennas. The primary purpose was confirmation that the maximal channel capacity parallel with minimal antenna correlation coefficient can be realized by selecting of perfect an...
During the planning of an UMTS radio network, there is a natural need for a base station positioning procedure. Good coverage at an acceptable level of network installation and maintaining costs, low interference and uniform interface load are the main requirements. In this paper, we present an approach based on simulated annealing for optimization...
Growing interest in providing and improving radio coverage for mobile phones and wireless LANs inside buildings has recently emerged. The need of such coverage appears mainly in office buildings, shopping malls in very complex environment. Although the three dimensional FDTD method has shown great promise, the calculation time is very environment d...
In this article we would like to present our results of channel capacity maximization by indoor environment. In this simulation we investigated a 3times3 indoor MIMO (Multiple Input Multiple Output) antenna system.
Citations
... The studies relevant to this paper are listed in [8]- [15]. In [8], a practical issue about antenna placement in Boeing 777 aircraft was investigated to support a high data rate with MIMO systems. ...
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... which is close to the location shown in Fig. 7b. It is also noticeable that (26) is almost identical to the first result in (25). This demonstrates the suitability of this method for weak contrasts. ...
... At mmWave frequencies, such an environment may not be available. An arrangement of three orthogonal receive branch polarizations at the antenna may provide yet greater capacity if the orthogonality criteria between them is relaxed [102], [103], or if polarization diversity is used in tandem with spatial diversity [104]. However, these arrangements do not optimize capacity for all antenna orientations. ...
