Remote SDR

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This is an idea page for the remote SDR setup. These are just ideas so far. Add yours!

Status:

  • 3/4 SDR units have been received, the LimeSDR has been ordered
  • one SDR (for ADSB) is operational but the antenna is not in an ideal location
  • Plans are being made to construct one or two additional antennas and mount at least one with the ADSB antenna
  • software survey in progress

See also subprojects:

intro[edit]

set up[edit]

  • Multiple SDRs will be available (at least 4 have been ordered so far)
  • Each SDR will have special features including
    • ADSB dedicated receiver
    • high resolution transceiver in shack on a random antenna
    • two cheap dongles on dedicated antennas (not built yet)
    • Each receiver's antenna will have a different range
  • Some (all?) SDRs should be remotely accessible to club members
    • log in remote and control it
    • remotely switch SDR software for local display
    • run monitors (see below) when idle
  • A stand alone display in a remote visible location could rotate through well labeled static and live displays
    • informational slides
    • live PSK display of an active band
    • live ADSB display
    • live FM broadcast display
    • prerecorded versions of live display data if receivers are down
    • user interaction with display?
  • temperature sensor?

Software[edit]

Ideas for software:

  • slide server (already implemented, client software could be tweaked)
  • server indexing active SDRs and what mode they can be put in or if they are already in use
  • SDR remote control software
    • view only / non-interactive client
    • bidirectional client with full control and selectable software

Interactive Applications[edit]

These allow (remote) users to interact directly with the SDR in one of several modes:

  • Webserver / browser based
  • raw I/Q or time domain based samples
    • rtl-tcp
  • processed frequency domain samples (lower bandwidth needed, higher local computational needs)

See also:

Automatic applications[edit]

These can run (automatically? randomly?) when the SDR is not in use by interactive applications.

HF applications[edit]

uhf/vhf applications[edit]

  • aprs
    • igate (rx, tx)
    • remote control? (rx)
    • telemetry: weather station? (tx)
    • TNC-X
  • NWS WX (rx)
  • automatic satellite reception (rx)
  • weather pic (rx)
  • collect data for TXID fingerprinting
  • direction finding via internet synchronized multiple receivers
    • range circles / signal strength
    • DF by time difference of arrival [8]
    • other DF methods [9]]
  • FM to text using google speech recognition libraries
  • lightning detection