传感技术学报2017，Vol.30Issue(11)：1671-1676,6.DOI:10.3969/j.issn.1004-1699.2017.11.010
电磁定位耦合信号提取方法研究
Research on Signal Extraction Method for Coupling Signals of Electromagnetic Localization
摘要
Abstract
The sinusoidal coupling signal extraction is crucial in electromagnetic positioning system. The result will affect the accuracy of localization directly. In the multi-frequency sinusoidal signal coupling system,saturation dis-tortion and frequency deviation caused by electronic components and system errors and other reasons will make it difficult to extract the signal parameters. This paper presents a method based on the theories of least squares and frequency approximation to recovery amplitude and phase from multi-frequency saturated sinusoidal signals with fre-quency offset. The method extracts the unsaturation samples in the sinusoidal signal. The least squares method is used to calculate the signal parameters,and then change the signal frequency to approximate to the optimal frequen-cy which makes squared error the minimum to estimate the exact parameters. The influence of noise,saturation de-gree and sampling number on parameter extraction are analyzed in simulation. Finally,the experiments show the ef-ficacy and practicability of the method.关键词
电磁定位/饱和正弦信号/频率偏移/信号提取/最小二乘法Key words
electromagnetic positioning/saturation sinusoidal signal/frequency deviation/signal extraction/least mean square分类
信息技术与安全科学引用本文复制引用
郭伟,胡超,林卫星..电磁定位耦合信号提取方法研究[J].传感技术学报,2017,30(11):1671-1676,6.基金项目
国家自然科学基金项目(61273332) （61273332）
宁波市科技项目(创新团队)计划项目(2014B82015) （创新团队）
