无线电工程2025，Vol.55Issue(7)：1394-1403,10.DOI:10.3969/j.issn.1003-3106.2025.07.004
顾及道路信息的GNSS阴影匹配定位方法
GNSS Shadow Matching Positioning Method Considering Road Information
摘要
Abstract
With the rapid development of multi-frequency and multi-constellation technology,the Global Navigation Satellite System(GNSS)has become the primary positioning method supporting various location-based applications.However,in complex urban canyon environments,satellite signals are often reflected,diffracted,or obstructed by buildings,leading to severe degradation in GNSS positioning performance and making it challenging to meet the requirements of high precision and real-time applications.In recent years,traditional shadow-matching algorithms have been particularly effective in urban canyon environments,yet their computational efficiency remains low,and their improvements in positioning accuracy are inconsistent.To address these issues,a shadow-matching method incorporating road information is proposed,which refines the search area and candidate points by leveraging road information and utilizes three-dimensional building models to score satellite signals and determine the optimal position.To evaluate the performance of the proposed method,experiments are conducted in urban canyon areas.The results demonstrate that,within applicable scenarios,the proposed method achieves an overall positioning accuracy of 2.59 m at a 2 m grid resolution,which is significantly superior to the accuracy of 23.80 m of the GNSS method and 5.47 m of the traditional shadow matching method.The accuracy is comparable to the results obtained at 1 m and 3 m grid resolutions.In addition,compared to the traditional shadow-matching method,the proposed approach achieves an average improvement of 39.55％in processing efficiency.These results provide valuable reference for enhancing GNSS applications in urban canyon environments.关键词
全球卫星导航系统/城市峡谷环境/阴影匹配/道路信息Key words
GNSS/urban canyon environment/shadow matching/road information分类
天文与地球科学引用本文复制引用
于一迪,章浙涛..顾及道路信息的GNSS阴影匹配定位方法[J].无线电工程,2025,55(7):1394-1403,10.基金项目
国家自然科学基金(42374014)National Natural Science Foundation of China(42374014) （42374014）
