From: Jens David (ezyzmu.juockw@cn.ru)
Date: Thu Apr 26 2001 - 23:29:09 EEST
Hi list,
KTelemetryDemod
---------------
A KDE2 application which reads audio data either from .WAV file or directly
sound card, demodulates the 400bps BPSK telemetry signal and outputs data
through a TCP/UDP network socket.
Features (from README):
- Nice user interface with lots of "bells and whistles" (TM)
- Many important DSP parameters are user-controllable
- DSP engine uses coherent demodulation by means of a second order Costas
loop design, should be fairly optimum
- Maximum-likelihood decision directed symbol timing estimation
- Decision feedback equalizer (DFE) with decision directed automatic tap
adjustment to compensate for broken equipment and/or frequency response
problems on transmission path
- Does initial discovery of carrier frequency using spectral estimation
method - thus generally no manual tuning necessary, but possible
- Diverse output formats (raw / raw+stuff / STP (KA9Q Internet Satellite
Telemetry Protocol)
- Supports Internet multicast for output data
QTelemetryView
--------------
QTelemetryView is, as the name suggests, not a KDE application but only based
on Qt. It is basically a Python script which uses PyQt (Python Qt bindings
from TheKompany) to present a nice user interface. It receives data from the
network and displays text and data areas of received telemetry frames after
decoding them according to the AO-40 telemetry specification on
http://www.amsat.de. It was designed to work in concert with KTelemetryDemod
but will also accept data from any other STP compilant demod application
(like Tom's for example).
Features:
- Portable. Should run on every platform Python and Qt are available for, and
these are quite a lot. Includes even the toy OSs.
- Receives data via UDP socket
- Supports STP (KA9Q Satellite Telemetry Protocol)
- Supports IP multicast
- Checks frame CRC on its own
Links:
======
Screenshot of both applications:
http://www.afthd.tu-darmstadt.de/~dg1kjd/telemetry/screenshot.jpg
Further info and download:
http://www.afthd.tu-darmstadt.de/~dg1kjd/telemetry
My homepage (root):
http://www.afthd.tu-darmstadt.de/~dg1kjd
Questions / Comments / Bug reports / -fixes:
mailto:sir.tqhvlou@jhancock.com
-- Jens
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This archive was generated by hypermail 2b30 : Fri Apr 27 2001 - 00:39:10 EEST
