| http://www.w3.org/ns/prov#value | - An exemplary prior art SDR contains an interface unit, such as Unit 19.1, a processor and a Digital to Analog (D/A) converter, Unit 19.2, an RF subsystem consisting of transmit RF amplifier, Unit 19.3, signal connection to and from transmit and or receive antenna, Unit 19.4, in the received signal path an optional RF Band-Pass-Filter (BPF), Unit 19.9, an Analog to Digital Converter (A/D), Unit 19.
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