摘要
GPS定位系统被普遍使用在军用和民用系统中,但是由于房屋等障碍物的遮挡,GPS无法用于室内定位。随着经济的发展,Wi-Fi覆盖范围越来广,基于Wi-Fi的定位系统的实现越来越成为可能。提出一种基于差分梯度匹配算法的Wi-Fi定位方法,差分梯度匹配即对Wi-Fi的信号强度进行梯度划分,不同梯度对应不同的匹配率,通过计算当前待定位点和指纹库里所有指纹的匹配率,找到匹配率最高的K个点,以这K个点的几何中心作为带定位点的位置坐标。
GPS positioning system is widely used in the military and civil systems, but because of housing and other obstacles, GPS cannot be used for indoor positioning. With the development of economy, the wide range of Wi-Fi coverage, the realization of the positioning system based on Wi-Fi is becoming more and more possible. Proposes a kind of based on differential graded matching algorithm of Wi-Fi location method, differential gradient matching is that dividing Wi-Fi signal strength to different gradient, different gradient corresponding to different matching rate, by calculating the current positioning and fingerprint library ＇s data matching rate and find the matching rate of the highest k points, the geometric center of the K points regard as the position coordinates of the current point positioning.
出处
《现代计算机》
2016年第3期26-29,共4页
Modern Computer
