Scheme And Design Of Improved Three-point Indoor Light Location Considering Occlusion

The traditional RSSI-based trilateral localization algorithm has the problems of low localization accuracy,too idealized localization model and limited effective localization area.In order to solve these problems,we propose an improved RSSI-based trilateral localization scheme and establish a localization model which is closer to the practical application environment.The improved scheme takes into full consideration the occlusion case and the influence of the LED layout on the positioning performance,In this thesis,we introduce the occlusion function to characterize the severity of occlusion.Combining the different positioning accuracy of different LED layouts,we select the best three LEDs as the localization nodes according to the relevant screening principle.Firstly,this thesis introduces the research background,research significance and current research status,and lists the innovation and research content of this paper.Secondly,this thesis introduces the principle of indoor location of visible light communication,first analyzes the channel characteristics of visible light communication,and then introduces the current indoor positioning model and algorithm in detail.Thirdly,In view of the problems existing in the traditional indoor positioning scheme,this thesis proposes an improved localization scheme,and establishes a new localization model which is simulated by MATLAB software,the results validates the feasibility of the improving scheme.Finally,the design of the receiving and sending circuit of the indoor positioning system is discussed for the improving scheme.According to the specific parameters,The transmitter circuit and the receiver circuit of the visible indoor positioning system are designed.And then the circuit simulation software to ensure that the relevant circuit meets the design requirements.And the actual circuit test of each module is operated respectively.Finally,an oscilloscope is used to test the overall circuit to ensure that the transceiver work properly.A detailed flow chart of the improved visible indoor positioning scheme is given,and each step in the flow chart is described in detail.