in this paper, a new propagation model based on utd for multiple diffraction paths in cellular mobile radio communications in urban environments is proposed. moreover, the most rigorous novel utd-based expressions for multiple diffractions by buildings and excess path losses are d - rived and analyzed. for this purpose, building rows are supposed to have rectangular cross-sections with the same...

Consider a sequence of bits where we are trying to predict the next bit from the previous bits. Assume we are allowed to say ‘predict 0’ or ‘predict 1’, and our payoff is +1 if the prediction is correct and −1 otherwise. We will say that at each point in time the loss of an algorithm is the number of wrong predictions minus the number of right predictions so far. In this paper we are interested...

Estimation of coherent and incoherent radio frequency (RF) signal attenuation through foliage is of great importance for a number of radar and communication problems. At UHF band and higher frequencies foliage presents a complex environment for electromagnetic waves in terms of scattering and wave propagation. For most applications, dealing with complex foliage models that account for single an...

Our long-term research goal is to model the in vivo wireless channel. As a first step towards this goal, in this paper we performed in vivo path loss measurements at 2.4GHz and make a comparison with free space path loss. We calculate the path loss by using the electric field radiated by a Hertzian-Dipole located inside the abdominal cavity. The simulations quantify and confirm that the path lo...

South America 10:00 376 25 % Abstract – Congestion in computer networks is a significant problem due to the growth of networks and increased link speeds. Now it is common to see internet gateway drops 10% of the incoming packets because of local buffer overflows. An optimal solution for this problem is Predicting congestion free path(s) by learning the dynamic characteristics of networks and it...