本文關(guān)鍵詞： 超寬帶 室內(nèi)定位 可擴展性 時鐘同步 TDOA　出處：《海南大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著無線通信技術(shù)的飛速發(fā)展和人們對定位服務(wù)的需求逐漸提高,室外定位GPS和GSM技術(shù)受房頂遮擋的影響,不能滿足人們對室內(nèi)定位服務(wù)的要求。雖然紅外線、藍牙、WiFi等技術(shù)已經(jīng)應(yīng)用于室內(nèi)定位并取得一定的效果。但是,面對日趨飽和的頻譜資源以及對定位系統(tǒng)精度、傳輸數(shù)據(jù)率和可擴展性的更高要求,上述的短距無線通信技術(shù)的研究逐漸進入瓶頸。在這樣的背景條件下,高時間分辨率、帶寬極寬的超寬帶無線通信技術(shù)凸顯出了較高的室內(nèi)定位性能優(yōu)勢。由于超寬帶無線技術(shù)發(fā)射功率低,因此超寬帶信號的傳輸距離短。因此,目前大多數(shù)的超寬帶室內(nèi)定位應(yīng)用研究是針對單個區(qū)域或較小范圍而開展的。為了擴展超寬帶定位系統(tǒng)的作用范圍,本論文將對超寬帶室內(nèi)定位系統(tǒng)的網(wǎng)絡(luò)可擴展性進行研究。研究工作主要從平穩(wěn)定位顯示結(jié)果、網(wǎng)絡(luò)擴展和無線時鐘同步這三個部分開展。其技術(shù)研究路線包含卡爾曼濾波平滑定位曲線、基站之間實現(xiàn)時間同步和無線網(wǎng)絡(luò)主基站自適應(yīng)選取這三點。論文研究基于Hainan-EVK 2000硬件平臺,利用TDOA定位算法,在對一個包含四個擴展區(qū)域的樓層內(nèi)進行定位測試。測試中對標(biāo)簽節(jié)點靜置和移動兩種不同運動狀態(tài)進行逐個區(qū)域的定位系統(tǒng)的性能測試。從大量的定位誤差、移動軌跡平穩(wěn)性等特征值測試數(shù)據(jù)分析,其結(jié)果表明即使在有障礙物等遮擋的情況下,超寬帶室內(nèi)定位系統(tǒng)的各個擴展區(qū)域均能取得較好的定位結(jié)果。相對單一區(qū)域定位來說,誤差增加相對較小。
[Abstract]:With the rapid development of wireless communication technology and the increasing demand for positioning service, outdoor positioning GPS and GSM technology can not meet the requirements of indoor positioning service because of the influence of roof occlusion. Bluetooth WiFi and other technologies have been applied to indoor positioning and achieved certain results. However, in the face of increasingly saturated spectrum resources and higher requirements for positioning system accuracy, data transmission rate and scalability, The research of the above short-range wireless communication technology has gradually entered the bottleneck. Under such background conditions, high time resolution, Ultra-wideband (UWB) wireless communication technology with very wide bandwidth highlights the advantages of high indoor positioning performance. Because of the low transmitting power of UWB wireless technology, the transmission distance of UWB signals is short. At present, most of the research on UWB indoor positioning applications is aimed at a single area or a small range. In order to expand the scope of UWB positioning system, This paper will study the network extensibility of UWB indoor positioning system. Network expansion and wireless clock synchronization. Its technical research route includes Kalman filter smooth positioning curve, Time synchronization between base stations and adaptive selection of main base station in wireless network are realized. Based on the hardware platform of Hainan-EVK 2000, using TDOA localization algorithm is studied. The performance of location-by-region localization system is tested for two different motion states of tag nodes, static and moving, from a large number of positioning errors to a large number of positioning errors, in which a location test is carried out on a floor containing four extended areas. The analysis of the test data of the stationary characteristic value of the moving trajectory shows that even under the condition of obstacle and so on, each extended area of the UWB indoor positioning system can obtain better localization results, compared with the single area location, the results show that the location of the UWB indoor positioning system is better than that of the single area location. The error increase is relatively small.
【學(xué)位授予單位】：海南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN925

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