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A joint indoor to outdoor ray launching algorithm is proposed in this paper. Different resolutions are considered for indoor and outdoor simulations. Instead of using conventional sampling technique to extract rays from a finer resolution, a novel method, named Ray Aggregation, is applied to minimise the loss of accuracy while benefiting from the computational cost of a coarse resolution. Furthermore,...
This paper investigates modeling and identification for the lower body of a social robot, Nancy, with flexible transmission. The flexible-joint and motor parameters of the rigid-link flexible-joint (RLFJ) model and the inertial parameters of the rigid model are identified in using the developed linear dynamic parametric model and the Weighted Least-Squares (WLS) technique. The comparison of these...
In this paper, a new model used to compute the outdoor to indoor signal strength emitted by a base station is presented. This model is based on the combination of 2 existing models: IRLA (Intelligent Ray Launching), a 3D geometric-like model especially optimized for outdoor predictions, and MR-FDPF (Multi Resolution Frequency Domain ParFlow), a 2D FDTD-like model initially implemented for indoor propagation...
Indoor propagation models attract much interest these days because of their importance in the applications of 3G/4G network planning and optimisation. The accuracy and running speed directly affects the practical use of such models. This paper extends a discrete ray launching model IRLA (Intelligent Ray Launching Algorithm) to indoor scenarios. A typical office room will be selected to validate this...
With the widely acceptance of WiFi networks, and the highly regarded development of new indoor technologies like distributed antenna systems and femtocells, propagation models that take accurately into account the indoor channel characteristics are necessary for the purpose of network planning. Due to the complexity of such indoor environments made of obstacles causing numerous reflexions and diffractions,...
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