Patent ID: 7577457

Claim:
A mobile device, comprising: a real-time component comprising: a system timing function, a real-time event dispatching function, and a digital radio that is configured to receive information content in a localcast-mode and in a broadcast-mode, and to transmit information content in a localcast-mode; wherein the broadcast mode operates on a subcarrier of a wide area transmitting channel and the localcast mode operates on a directly modulated main channel that is different from the wide area transmitting channel at which the broadcast mode operates; a digital control and processing circuit that generates receive commands in response to tracking information received on broadcast mode such that the tracking information is received on a different channel than the mobile device transmits on, wherein the receive commands describe a receive frequency, antenna tuning parameters, and a duration of capture time; an antenna assembly configured to be tuned in response to the receive commands; a microcomputer assembly; a random access memory; a nonvolatile memory; and a microprocessor-controlled user interface.