基于UWB基站配置的室內(nèi)定位研究
[Abstract]:With the increasing demand for location perception, indoor positioning has gradually become a research topic in scientific research and commercial field. Nowadays, the technology of outdoor positioning has been quite mature. GPS can achieve high accuracy in outdoor positioning, which has basically met the needs of people in outdoor location awareness. Therefore, the possibility and potential value of indoor positioning have been paid more and more attention to, drawing lessons from the mature technology and great value of outdoor positioning. As GPS technology can not be completely moved into indoor space, a set of mature indoor positioning technology has become a major research hotspot. High precision indoor positioning and even the seamless connection of indoor and outdoor positioning is the goal that researchers are pursuing. With the rapid development of wireless communication, various wireless positioning methods are being tested in indoor positioning. Ultra-wideband (UWB), as a rising star in wireless communication field, has been developed in many countries in recent years, but the research of UWB in China is a little backward. Because of its high time resolution, strong anti-jamming ability and strong penetration ability, UWB has a great development prospect in the relatively complex indoor environment. UWB uses pulse signal of nanosecond or even sub-nanosecond to transmit, and the precision in ranging work is very high. Many literatures have experimental results of using UWB ranging accuracy in centimeter level. In this paper, UWB is used for indoor positioning, and the effect of base station configuration on location accuracy is studied. The work done in this paper is mainly simulated in the environment of CST software. For the simulation of 6-10GHz in UWB, four types of base station configurations are selected: 8 base station, 4 cube base station, Y type 4 base station and L type 3 base station configuration. The location method is based on TOA estimation, which can give full play to the high time resolution of UWB signal. In the specific TOA estimation, two methods are used in this paper, namely, the method based on transmitting and receiving signal waveform and the CIR peak detection method. The results of both methods are satisfactory, and the positioning accuracy is 1-4 cm. Finally, GDOP is used to test the rationality of the proposed configuration.
【學位授予單位】:西安電子科技大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TN925
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