Frequency agile radio reception

摘要

The frequency-agile receiver is arranged to perform the steps of: sweeping a radio spectrum; determining if a pre-determined carrier preamble signal (217) is present in a radio signal; detecting the pre-determined carrier preamble signal receiving responsive to detecting the pre-determined carrier preamble signal message-data; and continuing, responsive to not detecting the pre-determined carrier preamble signal to sweep the radio spectrum, the transmitted signal comprising a pre-determined carrier preamble signal followed by a message-data signal. The above preamble can be in the form of a code.