[TangerineSDR] Notes from PSWS / TangerineSDR call of 12-14-2020

[Tom McDermott]

Notes from PSWS / TangerineSDR call of 12-14-2020

1. Dan has numerous scripts to install ham radio software on his github for
Raspberry Pi and Odroid.   https://github.com/n4xwe

2. Discussion on chirp decoder algorithms for TangerineSDR. One issue is
that some stations do not hold a rigorous schedule, another is that new
stations will pop up unexpectedly with (previously) unknown chirp rates and
from (previously) unknown locations. The search space is two or maybe three
dimensional. Current solutions for searching for ionosondes are
computationally expensive when done on the wideband data.

Approaches discussed include:

A. Have a few powerful computers that analyze wideband data to search, then
farm out the { start time / frequency, chirp rate, location } tuples to
multiple TangerineSDRs to locally synchronously dechirp.

B. Implement GPU acceleration at some of the receivers to attempt a similar
search. Could be done with graphics card, or something like a Jetson Nano,
etc.

Having the FPGA on the Data Engine dechirp multiple different parallel
lower-rate channels (perhaps 8 or 16 per receiver), and/or pre-process a
single wideband data stream to reduce the information rate to easily fit on
a single gigabit Ethernet could be helpful to these approaches

-- Tom, N5EG
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.tapr.org/pipermail/tangerinesdr_lists.tapr.org/attachments/20201214/5d77e3a6/attachment.html>