传感技术学报Issue(10)：1412-1417,6.DOI:10.3969/j.issn.1004-1699.2014.10.020
线性最小二乘法的RSSI定位精确计算方法∗
Accurate Computation Approach of RSSI￣Based Localization with Linear Least Square Method
摘要
Abstract
Based on the localization model with received signal strength indication ( RSSI ),an accurate localization computation approach of target node position is proposed. Transforming the nonlinear optimization function depicted by RSSI localization model as the estimation problem of linear least square method,the localization results are di￣rectly represented as algebraic solutions. The localization approaches of unconstrained linear least square(ULLS) method are proposed with known and unknown transmission power of target node. The parameters of ULLS method are further optimized,then the constrained linear least square( CLLS) method is put forward to improve the localiza￣tion accuracy. The simulations demonstrate the validity of the localization computation method and test the impacts of signal strength noises on localization error. The results also show that the localization error of CLLS method is less than that of ULLS method and very close to the Cramer￣Rao low bound( CRLB) of localization error.关键词
无线传感器网络/定位/无线信号强度/线性最小二乘法Key words
wireless sensor networks/localization/received signal strength indication/linear least square分类
信息技术与安全科学引用本文复制引用
袁鑫,吴晓平,王国英..线性最小二乘法的RSSI定位精确计算方法∗[J].传感技术学报,2014,(10):1412-1417,6.基金项目
国家自然科学基金重大项目(61190114)；国家自然科学青年基金项目(61303236)；浙江省教育厅科研项目( Y201328700)；浙江农林大学科研发展基金人才启动项目(2013FR086) （61190114）
