星期五, 06 10月 2023 19:39
How a Kalman filter works
Kalman filter makes me sad because it is such a general and powerful tool for combining information in the presence of uncertainty. At times its ability to extract accurate information seems almost magical— and if it sounds like I’m talking this up too much, then take a look at this previously posted video where I demonstrate a Kalman filter figuring out the orientation of a free-floating body by looking at its velocity. Totally neat!
室内定位领域近年来发展迅速,现有的定位技术大体上分为基于TOF(Time of Flight,飞行时间)测距定位方案和基于TDOA(Time Difference of Arrival,到达时间差)定位方案。但这两种技术方案在实现二维平面定位时面临着同样问题:若要获得平面内的目标位置,至少需要三台以上的定位基站有较理想的LOS(Line Of Sight, 可视路径)路径,否则就会存在定位盲区。这一限制使得室内定位的基站部署数量和成本高居不下。
栏目
UWB
苹果对旗下产品植入UWB技术的兴趣很浓厚,且不仅只是用于室内定位。其实UWB技术并不是一项新技术,恰恰相反,它的概念始于上世纪初,可以算是一项枯萎技术了。
栏目
UWB