O. Panfilov, R. Hickling, T. Turgeon, and M. Yagi (USA)
direct RF conversion, system interoperab ility, software radio
: The described solution to system interoperability problems is based on direct conversion from RF to baseband. It yields systems that can be configured as a cellular, trunked, repeater, or any other imaginable communication system that is not only frequency agile and protocol independent, but configuration agnostic as well. Such systems use conversion of received signals into its digital equivalent immediately after antenna. Followed digital signal processing using the dynamically downloadable software according to a specific standard corresponding to the received signal type makes these systems incredibly flexible in terms of frequency bands and protocols used.
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