Research On Indoor Wireless Propagation And Coverage Performance

For the past 30 years, the wireless communication industry focus mainly on the cellular network from the academic to technology, in the field of indoor wireless communication, both dissemination rules and coverage characteristics need further research.In indoor wireless communication model research, first thing is the theoretical model, Shannon's theorem reveals the logarithmic relationship of bandwidth of carrier signal and ratio of noise, and it leads to the way of calculating communication capacity limitation. Then many scholars explore further and summarize the wireless communication fading model, and some scholars put forward on the tracking method to study the light of radio waves propagation paths. But, along with the growth and boom in wireless communication, from single link to multilink, single task to the multitasking, single mode to multimode, interior space electromagnetic fields become more and more complex, we must find out a scientific and feasible research method, to carrying out qualitative and quantitative research and that is what we have done to reference model theory, based on the in-situ measured data, summed up the improved empirical prediction model. Of course, explores the law is the goal of the use of natural law to improve efficiency, therefore, a new dynamic statistical multiplexing method is also generated.The main researches and contributions of the thesis are listed as follows:(1) Based on the classic indoor wireless communication models, indoor wireless propagation fading models are established which are suitable for the indoor building characteristics. Carried out wireless distributed field measurements on underground parkings, shopping malls, offices, family bedrooms, and other typical scenes, fitted curve which reflected the propagation law by using the field test data, lay a solid foundation for building up the wireless indoor spread prediction models which suitable for general public indoor places.(2) Put forward and completed the system of measuring and analytical method including the all wave antenna correction, multiple sites measurement, obtained wireless propagation power spectrum characteristic curve and delay spread characteristic curve based on massive analysis and calculation. Completed the field measurement, formed indoor wireless communication model suitable for indoor building features, carried out analysis and estimation of their performance, the related work has joined Chinese relevant communication system standard proposal.(3) Based on the previous, given further analysis on the all-IP packets individual mechanism and MAC layer wireless resources scheduling processing method, given typical examples on dynamic multiplexing method. proposed method on establish "Shared channel", so as to form the two level data independence and multi-channel line parallel processing system structure, with significantly improve the system throughput rate and time delay performance. And proved the effectiveness that our technology can improve the main performance indexes of the system through simulation experiment and analysis. Provided new method and novel way in order to improve the indoor wireless transmission and coverage performance...