WIRELESS LOCAL MESSAGING SYSTEM AND METHOD OF DETERMINING A POSITION OF A NAVIGATION RECEIVER WITHIN A WIRELESS LOCAL MESSAGING SYSTEM

摘要

In a wireless local messaging system having at least one transmitter and at least one receiver, said at least one transmitter transmitting a local message to said at least one receiver, said at least one receiver is a navigation receiver configured to receive and process navigation messages from satellites of a global navigation satellite system on a given carrier frequency, each of said satellites transmitting the navigation messages with a satellite-individual PRN code, said at least one transmitter is configured to transmit said local message in a local message signal on the given carrier frequency with a local PRN code which is not used by a satellite of said global navigation satellite system, and said at least one receiver is further configured to receive said local PRN code and to process said local message signal.