tutorial-GNU radio

Cognitive Software Defined Radio:Applications of Cognitive SDR using the GNU Radio and the USRP09/09/05David ScaperothOverview(1) Software Defined Radio– Definition– Pros and Cons– Applications(2) Cognitive Radio– Definition– Pros and Cons– Applications(3) GNU Radio and the USRP– Definition– How are we using it now?(4) Future Work with CR and GNU RadiosCognitive Radio• “Turning the Knobs”– responds to the operator’s commands by configuring the radio• “Reading the Meters”– monitors its own performance continuouslyCognitive Radio• Knobs and MetersSoftware Defined Radio (SDR)• The Cognitive Engine tells the radio how to control the knobs and meters.Cognitive RadioCognitive RadioSoftware Defined Radio (SDR)• Broad Range of Definitions• John Mitola (‘92) - radio primarily defined in software, which supports a broad range of frequencies, and its initial configurations can be modified for user requirements.• Dr. Jeffery Reed - A flexible radio that can be able to accommodate formats and protocols yet to be determined.• Not necessarily a microprocessor - much more flexible.Radio ArchitectureSuperhetrodyneBaseband RF IF SignalSignal SignalAmplify AmplifyMixer MixerFilter FilterSoftware Defined RadioRF IF Signal SignalAmplify Analog DigitalMixer To Digital Signal Filter Converter ProcessingRxTxSoftware Defined Radios• Pros– Flexibility– Reduced parts inventory– DSP can compensate for cheaper RF– Faster Time to ...