Method and apparatus for providing an integrated communications, navigation and surveillance satellite system

摘要

A system provides integrated communications, navigation and surveillance capabilities. The system includes a space segment having a plurality of satellites broadcasting multiple navigation signals and a communication signal. A user segment includes a user device that is operable to broadcast communication signals to the satellites and of using the navigation signals broadcast by the satellites to determine a position of the user device. The satellites are operable to receive the communication signals from the user device and determine a position of the user device based upon the received communication signals. The satellites broadcast one of the navigation signals and the communication signal at a same frequency. The navigation signal acts as a pilot tone for the system to acquire and synchronize the user device with the system.