Patent ID: 7437167
Filing Date: 2008-10-14
Classification: G01S,H04W

Abstract:
1. An apparatus for transmitting and receiving a Radio Frequency (RF) signal, the apparatus comprising: a receiver module configured to receive an RF signal, decode a serial number contained in the RF signal, and determine whether the RF signal originated from a companion device or from a foreign transmitter. a transmitter module configured to selectively transmit a message using a low power RF signal and a high power RF signal; and a control module configured to respond to a message containing a matching serial number originating from the companion device by sending a low power RF transmission containing an identification code, and to a message containing a matching serial number originating from the foreign transmitter by sending a high power RF transmission containing a station identifier of the foreign transmitter; and wherein the foreign transmitter comprises an amateur radio (HAM) transmitter and the station identifier comprises call letters allocated to the operator of the HAM transmitter.