Communicating Is Crowdsourcing:Wi-Fi Indoor Localization with CSI-Based Speed Estimation

来源 :计算机科学技术学报(英文版) | 被引量 : 0次 | 上传用户:jyc894784116
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Numerous indoor localization techniques have been proposed recently to meet the intensive demand for location-based service (LBS). Among them, the most popular solutions are the Wi-Fi fingerprint-based approaches. The core challenge is to lower the cost of fingerprint site-survey. One of the trends is to collect the piecewise data from clients and establish the radio map in crowdsourcing manner. However the low participation rate blocks the practical use. In this work, we propose a passive crowdsourcing channel state information (CSI) based indoor localization scheme, C2IL. Despite a crowdsourcing based approach, our scheme is totally transparent to the client and the only requirement is to connect to our 802.11n access points (APs). C2IL is built upon an innovative method to accurately estimate the moving speed solely based on 802.11n CSI. Knowing the walking speed of a client and its surrounding APs, a graph matching algorithm is employed to extract the received signal strength (RSS) fingerprints and establish the fingerprint map. For localization phase, we design a trajectory clustering based localization algorithm to provide precise real-time indoor localization and tracking. We develop and deploy a practical working system of C2IL in a large office environment. Extensive evaluations indicate that the error of speed estimation is within 3%, and the localization error is within 2 m at 80%time in a very complex indoor environment.
其他文献
目的:观察扶正解毒中药与微波凝固联合治疗肝癌的增效解毒作用。方法:设治疗组21例:采用扶正解毒中药内服、参麦针、清开灵针剂静滴,配合微波对肝肿块凝固治疗;对照组20例:在
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
期刊
2010年3月15日,省农机推广总站在长春召开了2010年全省农机推广站长会议.rn省农委副主任陈巳、省农委农机处副处长翟廷华、省农委科教处副处长秦吉、省农业机械管理总站站长
请下载后查看,本文暂不支持在线获取查看简介。 Please download to view, this article does not support online access to view profile.
期刊
小时候,每当晚饭后,便黏着父亲从书箱里翻出一本颜色泛旧的古书,点燃麻油灯,一家人围坐在一起,静听父亲“之乎者也”地诵读。而后,父亲再用白话,把文中美妙幽深的故事讲给我
糖尿病是世界上四大慢性疾病之一.随着人们生活方式的改变,生活水平的提高,糖尿病患者逐步上升.随着我国工农业及交通运输的发展,交通伤也呈上升趋势,不安全隐患造成的工伤事
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
期刊
2010年3月16日,省农机推广总站在长春召开了吉林省农业机械化技术推广协会成立大会.rn出席会议的有中国农业科技创新中心主任王立春,吉林省民间组织管理局局长周秀,省农委人
2010年3月1日,省农委召开了委机关及委直事业单位主要负责人会议.省农委主任任克军,副主任陈巳、于文波、吴晓光、刘丰艳,监查专员王峻岩,巡视员于畅洋,主任助理潘书华,省农
人工晶体植入术后发生眼内炎是致盲的严重并发症,一旦发生,不仅可造成视力丧失,而且还可能丧失眼球.目前,早期行玻璃体切割术是保留有效视力的最佳方案.在我们基层医院,由于