Optimization Of UWB Localization Algorithm In Local Range

With the rapid development of modern wireless communication technology,emerging communication technology has mushroomed,and the traditional positioning technology has been widely known and applied,and then derived from the new wireless positioning technology for the desire and desire.The deterioration of the natural environment,resulting in debris flow,frequent floods,but also accelerated the desire for efficient positioning technology.The local area-wide positioning technology is still very limited,especially in the local context of the complex environment,obstacles and noise interference on the signal transmission,which are caused by local area positioning technology is still not mature reasons The With the development of wireless technology,ultra-wideband signal into the eyes of people,ultra-wideband(UWB)signal with strong penetration,anti-jamming capability and low power consumption and high multipath resolution,but more use Ultra-wideband ground penetrating radar,for disaster relief and life search and some other large-scale field activities,which is clearly limited the development of ultra-wideband.After many years of scholars efforts,in the data age,ultra-wideband technology more and more people to the people's lives,with more and more local environment within the environment needs information,came into being this new It is necessary to study the localization algorithm in the ultra-wideband local area.In this paper,we first discuss the definition of UWB signal,introduce the advantages of UWB signal itself,and then analyze the principle and flow of UWB in local environment,and intuitively express the ultra-wideband signal from And then to describe the positioning of the whole process;then described the ultra-wideband signal waveform,in the actual application and local area simulation under the majority of the ideal Gaussian signal,but it also produced an unavoidable error,and then introduced the Board Domain-wide channel model,which can correct the initial parameters in the positioning measurement,so that the initial value of the positioning algorithm is more accurate.Through simple comparison and previous lessons,in the paper we finally chose the IEEE802.15.4a model,which was modified on the previous model and introduced the channel parameters suitable for the more suitable local area.In this paper,the focus and difficulty of this paper are the optimization of the positioning algorithm.First of all,the paper first describes the measurement basis,respectively,based on ranging and non-ranging two,due to accuracy and the main reason for the non-distance positioning is only understatement(TOOA),arrival time difference(TDOA),arrival angle(AOA)and signal intensity(RSSI)are analyzed and analyzed in this paper.Then,based on these four parameters,several optimization localization algorithms are proposed,and then their respective advantages and disadvantages are compared with the applicable environment.After the paper,a new hybrid algorithm based on hybrid parameters is proposed.The advantage of this algorithm is that it can increase the complexity of the algorithm and improve its positioning accuracy,so that it can be closer to the lower limit of the theoretical case.Finally,this paper first analyzes the error sources in the UWB local area,and then analyzes and selects the error criteria respectively.Finally,we use MATLAB to simulate the number of known nodes and the signal noise in the optimization algorithm Compared with the different circumstances of the graphics,and each algorithm in two cases of the simulation map to do comparison analysis.Finally,from the simulation point of view,we can clearly see the hybrid parameter algorithm with higher accuracy.At the end of the paper,the paper summarizes the whole paper,and also explains the prospect and prospect of ultra wideband local area positioning.