Ultra-tight integration of GPS with vehicle sensors for high-sensitivity navigation

使用全球导航卫星系统(GNSS)技术(如美国全球定位系统(GPS))的车辆导航正变得无处不在，汽车制造商提供车载系统，目前有几个售后系统可用。然而，这些系统中的全球导航卫星系统接收器通常是自主运行的，不利用可能获得的其他与导航有关的信息，例如来自车辆里程计或其他车载传感器的信息。相反，全球导航卫星系统的测量只有在事后才与车辆传感器信息相结合；这种方法被称为“紧密整合”。

Vehicular navigation using Global Navigation Satellite System (GNSS) technology such as the U.S. Global Positioning System (GPS) are becoming ubiquitous, with automotive manufacturers provide onboard systems and with several aftermarket systems currently available. However, the GNSS receivers in these systems generally operate autonomously and do not make use of other navigation-related information that may be available, such as from the vehicle's odometers or other onboard sensors. Rather, the GNSS measurements are only integrated with vehicle sensor information after the fact; an approach known as "tight integration".