| 基于权值参数的WiFi定位算法研究 |
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| 引用本文： | 郑学伟.基于权值参数的WiFi定位算法研究[J].国外电子测量技术,2014(3):35-37,50. |
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| 作者姓名： | 郑学伟 |
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| 作者单位： | 辽宁广播电视大学,沈阳110034 |
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| 基金项目： | 2012年国家开放大学年度课题《基于SemanticWeb的开放大学知识管理交流建设研究》（Q0604F-Q）,2012年辽宁省现代远程教育学会年度课题《基于SOAP的网络管理体系研究》（2012xh25）阶段成果 |
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| 摘 要： | 针对WiFi定位技术中基本三边定位算法的测距模型参数不确定和定位计算误差大等问题,提出了基于权值的参数实时更新定位算法。该算法首先按照基于区分度能力的信息增益方法选择3个最能反映待定位点信息的访问接入点AP,然后对测距模型进行实时获取参数的改进,最后对三边定位计算中的距离进行加权处理。实验表明,提出的定位算法能减小由环境因素和信号强度测量值引起的误差,与基本的三边定位算法相比,算法具有更高的定位精度。
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| 关 键 词： | WiFi定位 实时定位 实时测距模型 距离权值 卡尔曼滤波 |
Research of wiFi position algorithm based on weight parameters |
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| Zheng Xuewei.Research of wiFi position algorithm based on weight parameters[J].Foreign Electronic Measurement Technology,2014(3):35-37,50. |
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| Authors: | Zheng Xuewei |
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| Affiliation: | Zheng Xuewei (Liaoning Radio and TV University, Shenyang 110034, China) |
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| Abstract: | Considering the fact,that the range model parameters of basic Wi-Fi trilateration localization algorithm are un- certain and its positioning calculation errors are dramatic, a weight-based real-time parameter localization algorithm is proposed to ameliorate these issues. Firstly, three APs which can best explain the information of object are selected ac- cording to the information gain method based on degree of differentiation ability. Then, the range model is improved to acquire the parameters in a real-time way. Finally, the distance weights are introduced to the positioning calculation mod- el. The experiment results show that the proposed WRPLA can reduce the error caused by surroundings and signal strength; it has higher positioning precision comparing with the basic trilateration localization algorithm. |
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| Keywords: | WiFi location real time location real-time range model distance weights Kalman filter |
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