本文選題：可見光定位 + 可傾斜光接收機��； 參考：《南京郵電大學》2017年碩士論文

【摘要】：最近,可見光通信作為一種新興的無線通信技術,與其他無線通信技術相比,具有節(jié)能、無電磁干擾和傳輸速率高等特點。以LED作為光源的可見光通信系統(tǒng)在照明的同時能夠進行數(shù)據(jù)傳輸,實現(xiàn)照明通信一體化。如今,全球定位系統(tǒng)已經成熟,在室外定位中能夠實現(xiàn)較高的定位精度,但在復雜的室內環(huán)境卻無法利用全球定位系統(tǒng)進行室內定位。因此,可見光定位已逐漸成為室內環(huán)境的研究熱點。本文基于單個發(fā)射端和單個傾斜光接收機,提出了一種三維(3-D)室內可見光定位系統(tǒng)。傾斜的光接收器位于可旋轉和可升降的平臺上.通過提升光接收器的平臺,可以將3D空間被劃分為許多二維(2-D)平面。在每個2-D平面中,可以通過旋轉接收器平臺來獲得各種方位角,這提供了以不同方位角執(zhí)行多個測量以實現(xiàn)角度增益的可行方式,根據(jù)角度增益的差異,提出了一種3-D定位算法。實驗結果表明,提出的定位算法可以提供良好的定位精度�；谠撊S定位系統(tǒng),論文的研究重點主要包括以下幾個方面:(1)在研究了常見的室內可見光定位技術原理的基礎上,綜合可見光通信系統(tǒng)的相關背景知識,本文創(chuàng)新性的提出了基于單傾斜接收機的三維可見光定位系統(tǒng)。在系統(tǒng)中,將設計的光接收模塊與光學斜面和旋轉平臺以及升降支架組合后制成一個可傾斜可旋轉的接收機。它為定位系統(tǒng)中反復多次的精確的方位角度測量提供了有效保障,減小了因角度測量所引起的誤差。(2)構建了基于單傾斜接收機的三維可見光室內定位演示系統(tǒng),在該演示系統(tǒng)中通過升降接收機支架,進行了三維空間內的定位實驗,在600mm*600mm*1135mm的實驗環(huán)境中實際位置與估計位置之間的平均定位誤差小于35mm。實驗結果表明基于單傾斜接收機的三維可見光室內定位系統(tǒng)具有較高的定位精度,為可見光室內定位提供了一種新的解決方案。(3)為了提高系統(tǒng)性能和定位精確度,研究了接收機傾斜角對于系統(tǒng)性能的影響,基于信道容量的導出表達式,提出一個通過傾斜接收機平面來提高系統(tǒng)性能的最優(yōu)化問題,并且通過專門的求解工具求解該優(yōu)化問題,最終通過對傾斜角?等變量的仿真,得到在系統(tǒng)發(fā)射光功率一定,LED光源的半功率角適當時,增加接收機的傾斜角,可以提高基于單傾斜接收機的可見光室內定位系統(tǒng)的系統(tǒng)性能,從而進一步提高系統(tǒng)定位的準確性。
[Abstract]:Recently, as a new wireless communication technology, visible light communication has the advantages of energy saving, no electromagnetic interference and high transmission rate compared with other wireless communication technologies. The visible light communication system with LED as the light source can transmit data while illuminating and realize the integration of lighting communication. Nowadays, the global positioning system (GPS) is mature and can achieve high positioning accuracy in outdoor positioning, but it can not be used in indoor positioning in complex indoor environment. Therefore, visible light location has gradually become a hot spot in indoor environment. Based on a single transmitter and a single tilted light receiver, this paper presents a three dimensional (3D) indoor visible light positioning system. The tilted light receiver is located on a rotatable and liftable platform. By lifting the platform of the optical receiver, 3D space can be divided into two-dimensional 2-D planes. In each 2-D plane, various azimuths can be obtained by rotating the receiver platform, which provides a viable way to perform multiple measurements at different azimuths to achieve angular gain, depending on the angular gain. A 3-D location algorithm is proposed. Experimental results show that the proposed localization algorithm can provide good positioning accuracy. Based on the 3D positioning system, this paper mainly includes the following aspects: 1) on the basis of the research of common indoor visible light positioning technology, the paper synthesizes the background knowledge of visible light communication system. In this paper, a three-dimensional visible light location system based on a single tilt receiver is proposed. In the system, a tiltable and rotatable receiver is made by combining the designed optical receiving module with the optical sloping plane, the rotating platform and the lifting support. It provides an effective guarantee for repeated and accurate azimuth angle measurement in the positioning system, and reduces the error caused by angle measurement. A 3D visible-light indoor positioning demonstration system based on a single-tilted receiver is constructed. In this demonstration system, the positioning experiment in three-dimensional space is carried out by lifting receiver bracket. The average positioning error between the actual position and the estimated position in the 600mm*600mm*1135mm experimental environment is less than 35mm. The experimental results show that the 3D visible-light indoor positioning system based on single-tilted receiver has high positioning accuracy and provides a new solution for visible-light indoor positioning. In this paper, the influence of receiver tilt angle on system performance is studied. Based on the derived expression of channel capacity, an optimization problem is proposed to improve the system performance by tilting the receiver plane. And through a special solution tool to solve the optimization problem, finally through the diagonal angle? When the half-power angle of LED light source is appropriate, the system performance of the visible light indoor positioning system based on single-tilted receiver can be improved by increasing the inclination angle of the receiver. Thus, the accuracy of system positioning is further improved.
【學位授予單位】：南京郵電大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.1

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本文編號：1851144