High-Precision Localization in Mobile Wireless Networks

定位是移动的无线网络中的关键业务之一。全球定位系统（GPS）已被广泛用于定位移动的网络节点。然而，GPS需要卫星的视线，并且在视线不可用时（例如，在室内或在市中心峡谷中）停止工作。此外，GPS往往会消耗大量电力，这对于智能手机和智能手表等电力受限的设备来说是一个很大的问题。与GPS相关的问题促使许多研究人员设计各种不同的定位方法，在GPS不能很好地工作的情况下。尽管现有的非GPS定位方案可以完全或部分地避免GPS的使用，但它们仍然存在定位精度低、计算复杂度高等严重问题。在这个项目中，我们计划探索各种非GPS技术，以实现室内和室外环境中的高精度移动的定位。

Localization is one of the key operations in mobile wireless networks. The Global Position System (GPS) has been widely used to locate mobile network nodes. However, GPS requires the line of sight to the satellites and stops working when the line of sight is not available (e.g. indoors or in a downtown canyon). In addition, GPS tends to consume much power, which is highly problematic for power-constrained devices such as smartphones and smartwatches. The problems associated with GPS have motivated many researchers to devise a variety of different localization methods for the scenarios in which GPS does not work well. Despite the fact that the state-of-the art non-GPS schemes can completely or partially avoid the use of GPS, they still suffer from several serious problems such as low localization precision and high computation complexity. In this project, we plan to explore varied non-GPS techniques to achieve high-precision mobile localization in both indoor and outdoor environments.