District Of Urban Micro-cellular Radio Propagation Analysis Based On Accelerated Multi-image Method

The mobile communication is developing all over the world at very fast speed. And people are getting close touch with the mobile communication in the daily life. For the sake of each corresponding using the available frequency source and increasing mobile communication net, radio electric cover frequently adopts the frame of tiny honeycomb. So mastering the propagation property of tiny honeycomb wireless mobile channel is very important in the research and development of wireless transmit technical, the design of wireless communication net and programming and optimizing.In recently years, many thesis have been issued about the city'electric wave propagation in the famous inland or outer publication. But in the various document data more electromagnetic wave propagation forecasts at the urban area the buildings were regularly arranged and detailed datum that the forecasts aimed at he urban area that the buildings were regular arranged were not seen.The text uses the method of ray tracing that is based on improved traditional mirror image principle of the radio wave forecast and two ray propagation model, which can be used in any complex propagation environment and found any propagation path from the sending set to receiving machine without redundancy computer. Besides in nature, it is ray tracing based on the method mirror image. So it need not receive test, have higher computational efficiency and assure higher precision. The text brings forward many rapid calculations according to physical truth. In the algorithm routine, using the multi-way tree of the data structure, using the concept the software visual C++'s array of structures to form dummy source tree. The text even explores the method to build the building database and computes the field intensity based on geometrical optics and consistency diffraction theory.This text has counted the electric wave propagation path loss of street in one kind of typical rule range urban area, and reaches calculations data fairly with the measured data in the document. Then calculate and analyze electric wave propagation's characteristic in urban area. Finally give an electric wave propagation prediction application example of column building model.