Barely Works Technology
DSP Code Page

- Acquire a PROM programmer and eraser and some appropriate EPROMs
  - Replace the current EZ code in DSP-10#1 with 3.80 on EPROM.
  - May need to write or find a converter for EZ and DSPx format

- Fully support or improve the legacy interface

- Implement CW
  - may include coherent or matched filter reception (requires 2 DSP-10 and attenuator)

- Implement SSB

- Digital Voice
  - DStar
    - See QEX 2003 Jul/Aug p. 30.  All sales.
    - See QEX 2003 Sep/Oct p. 22.  Not enough to work from but might have pointers.
  - reply to or answer KQ6EH who has been heard on 144.200 calling digital CQ.  Is this his format?
  - Reference is http://www.arrl.org/tis/info/digivoice.html
  - The ARD9000MK2 Ditgital Voice Modem is seen at QST 2006 April, p. 160.
  - Digital Radio Mondiale (DRM).  QEX 2003 Jan/Feb p. 49.  Not enough to implement but might have references.
  - ARRL HF digital radio RFP.  QEX 2007 May/June p. 49.
  - AOR digital adapter system for HF rigs.  QST 2007 June, p. 160.
  - Digital HF Voice Modems, G4GUO, QST 2004 February p. 80.
  - Speech processing math.  QST 2006 January, p. 31.
  - AOR QST 2007 July, pp. 2, 16.

- Re-implement EME2
  - leave the frequency hopping and general timing as is
  - consider different bin sizes to "optimize" the problem in some sense
  - signature, like 2/3 power at +5 bin and 1/3 at -5 bin
  - calibrate filter ripple?

- Re-implement LTI
  - Extend with the capability to set a periodic or "VCR-like" schedule.
    - Restart and save yellow line plots throughout a day for example.
    - Propagation study.

- Re-implement PUA43
  - Test using DSP-10-2 and attenuator cable

- JT-65 (JT-44)
  - JT-65A on HF for weak signal QSOs.  QST 2007 July, p. 85.
  - JT-65, good introductory rundown, QST 2005 June, p. 80.

- Satellite
  - 1200 bps PSK (AO-16)
  - 9600 bps AFSK (later sats)
  - phase tracker for orbit determination
    - This will include "autotuning" as needed.
    - Data context tune switching if needed.
  - anybody still use 400 bps psk?
  - FEC tips in AMSAT Journal 2003 Sep/Oct p. 8

- Meteor modes
  - goes with 6 m and 2 m
  - FSK441, QST 2005 June, p. 80.

- "Sound Card" modes
  - PSK 31
  - MFSK 16
 - Information on some such modes
    - http://www.rsgb.org.uk/emergency/articles/datmodes2.pdf
    - http://www.qsl.net/zl1bpu/DOMINO/Index.htm
    - http://www.qsl.net/zl1bpu/DOMINO/Technical.htm
    - http://www.obriensweb.com/dominoexcontest.htm

- Digital SSTV
  - QST 2004 February, p. 47.

- Noise Blanker
  - Linrad has one.  Also see QEX 2003 Sep/Oct p. 29.

- References
  - KA9Q DSP and FEC library
  - Discussion of dither - KD7O in QEX 2003 March/April p. 3.
  - Patents, Copyrights and Trademarks - QEX 2003 March/April p. 13.
  - SDR-1000 detection circuit QEX 2003 March/April p. 20.
  - Radio Frequency Design and Digital Signal Processing Technology, QST 2004 January, pp. 126, 118.


last updated 2008 January 2 cbd