| New wireless technologies, Third-Generation Partnership Project (3GPP), Wideband-CDMA (WCDMA), 802.11, bluetooth, and Ultra Wide Band (UWB) systems are rapidly gaining interest and market penetration. Analysts in the U.S. are predicting more than 20 million broadband portable systems by the end of this decade. An increased percentage of these broadband technologies are being deployed for in-building coverage and capacity.; The investigation of radio transmission into buildings is imperative. There have been many models for propagation into and within buildings developed over the past several years to enable the calculation of indoor field strength coverage based on the given outdoor coverage. In order to calibrate such models ray tracing modeling is an invaluable approach to verify and validate such models. Also, with the increasing need to improve the accuracy of propagation predictions and the requirement to sufficiently assess the broadband characteristics of a wireless channel (power delay profiles and direction of arrival of a multipath signal), building and location specific tools have become an asset in the communication industry.; This thesis presents an efficient form of ray-tracing technique based on the uniform theory of diffraction and image theory. The combination of ray launching and ray tracing cleverly coined as Launched Ray Tracing is developed. Then a unique measurement technique using a rake receiver is introduced. Thirdly the algorithm is defined and the final chapter investigates the accuracy of the presented model, comparing the predicted with a wide-band measured data. The analysis validates the power predictions and rms delay spread to the measured data. Jointly considering the simulator results, measurement results, geometries and electrical properties of the surroundings, a technique to delineate scattering behaviors into corner reflection, diffraction and tunneling behaviors is developed. This delineation technique, applied to residential environments in this dissertation, is considered to be applicable to a general indoor environment. |
