计算机技术与发展Issue(9)：61-65,5.DOI:10.3969/j.issn.1673-629X.2015.09.013
CHAN算法在LOS和NLOS环境下的定位研究
Study on Localization of CHAN Algorithm in LOS and NLOS Environment
摘要
Abstract
Among the positioning algorithms based on TDOA,CHAN algorithm is widely used for its small calculation and high positio-ning accuracy in LOS propagation environment. However,CHAN positioning performance decreases significantly when the propagation condition is NLOS. In the case of NLOS,especially in dense urban areas,the radio signals can’ t travel in straight lines with the existence of the obstacles such as tall buildings,thus introducing the NLOS error. While the weighted matrix in CHAN algorithm is unable to elimi-nate the NLOS error for it only considers system error. Based on the study of CHAN algorithm in LOS environment and the analysis of statistical characteristics of NLOS error,a method which improves the CHAN performance in the case of NLOS by optimizing the NLOS TDOA measurement error is proposed in this paper. Analysis of CHAN algorithm is done by computer simulation in different environment models. The simulation results show that improved CHAN algorithm can achieve better positing performance.关键词
时间到达差/CHAN算法/视距/非视距传播Key words
TDOA/CHAN algorithm/LOS/NLOS propagation分类
信息技术与安全科学引用本文复制引用
陆音,王宝全,丘觐玮..CHAN算法在LOS和NLOS环境下的定位研究[J].计算机技术与发展,2015,(9):61-65,5.基金项目
国家自然科学基金资助项目(61271236) （61271236）
工业和信息化部通信软科学项目(2014-R-50) （2014-R-50）
江苏政府留学奖学金资助项目 （）
南京邮电大学校项目(NY210007) （NY210007）
南京邮电大学大学生创新训练计划省级重点项目(SZDG2013012) （SZDG2013012）
