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Software-Defined Radio

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Software-Defined Radio

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    1. Software-Defined Radio Sponsor: CALIT-2 Mentor: Prof. Bill Hodgkiss Team members: John Burch Isaac Caldwell Matt Costa

    2. Agenda Introduction Gantt Chart Status of hardware Two Functional USRPs FM Testing and Wrap-up FSK Progress

    3. Gantt Chart

    4. USRP Hardware As mentioned last time, we had one working and one malfunctioning USRP board. Defective one was sent back to Ettus last week. We received the USRP back from them today, and performed tests to ensure that it was indeed working.

    5. Spectrum Analyzer

    6. Functional USRP Without a second USRP, the available choices of what could be done were very limited. Simply sensing the ambient spectrum seems to verify functionality, but nothing interesting in view. With 2 radios we can set up a transmitter and receiver

    7. FM Radio Progress on software side of FM radio seems to be complete. By experimenting with the GNU Radio processing blocks, an FM spectrum that more greatly resembles the expected one was produced.

    8. FM Transmitter

    9. Testing of FM Radio Plan on using one USRP to transmit, and one to receive. If this fails then a backup plan would be to use a function generator or spectrum analyzer as the transmitter/receiver to one of the radios. Obtained a function generator capable of producing a frequency-modulated tone in the 2.4GHz range, as that is the type of antenna available on the USRP. Can use the USRP and the GNU Radio software to receive, demodulate, and play back the tone.

    10. FSK Modulation

    11. FSK Progress Work on frequency-shift keyed radio has slowed: Attempts to incorporate existing FSK work into this project have been met with numerous compiling errors. Creating our own from scratch may not be feasible with the time remaining. Evaluation of FSKs viability is in progress.

    12. Next Steps Test the FM receiver in a physical set-up. Resolve issues with FSK communication. Begin final documentation.

    13. Summary Tested the Hardware FM (apparently) complete The future of FSK Next steps

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