DATA EXCHANGE BETWEEN ANTENNA AND MODEM OF MOBILE DEVICE

摘要

In one embodiment, a method includes accessing data encoding a response shift in a signal received through an antenna of a mobile device. The signal corresponds to wireless communication to the mobile device from another device. The response shift is detected and encoded by a modem of the mobile device coupled to the antenna. The method also includes determining an environmental or operational state of the mobile device based at least in part on the response shift encoded in the data.