Summary
International Symposium on Antennas and Propagation
2008
Session Number:1IS01B
Session:
Number:1IS01B-2
Ray-Tracing Acceleration Technique Employing Genetic Algorithm for Radio Propagation Prediction
Tetsuro IMAI,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
Up to now, in wireless communication systems such as cellular systems and wireless LANs, it has been essential to predict the radio propagation loss when designing service areas. Furthermore, in order to estimate the performance of spatial-temporal signal processing techniques in practical communication environments, predicting propagation path characteristics such as the direction of arrival (DOA), direction of departure (DOD), and time of arrival (TOA) is important [1, 2]. The ray-tracing method is very attractive because several radio propagation characteristics can be simply predicted. In the ray-tracing method, there is a tradeoff relationship between the prediction accuracy and computation time. In order to obtain a high level of prediction accuracy, it is necessary to trace the higher-order rays that undergo interaction (reflection, diffraction, or transmission) many times, while taking into account as many structures in a wide area as possible. Therefore, the number of ray-tracing processes increases and the amount of time increases. Many acceleration (and/or efficiency) techniques for ray-tracing processing were investigated [3-8]. In Section 2, a ray-tracing method is introduced that employs the genetic algorithm (or GA) to accelerate the ray-tracing processing [12-15]. Hereafter, we call this method the GA_RT method. Section 3 presents the performance of the GA_RT method based on numerical simulation results. Finally, the concluding remarks are given in Section 4.