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[Discuss-gnuradio] Mode S and ADS-B
From: |
Eric A. Cottrell |
Subject: |
[Discuss-gnuradio] Mode S and ADS-B |
Date: |
Tue, 03 Jul 2007 03:04:44 -0400 |
User-agent: |
Thunderbird 1.5.0.8 (X11/20060911) |
Hello,
I finally checked in the infamous Mode Select code to
branches/developers/wb1hbu/wip and I am glad this portion is done.
I spent a couple of days cleaning the code up a little. I also added
some features. Likely I missed using a few neat gnuradio functions.
There is a usrp_oscope_ms.py program that displays the Mode Select
signal, Reference Level, and Attributes. Triggering off of channel 2
(Reference Level) allows the display of Mode Select waveforms. I made
the attributes go negative so they are more visible. I was surprised at
the results.
The usrp_mode_s_logfile.py program outputs Mode Select frame information
to a log file. It does no decoding of the data. It logs the data bits
and other attributes of the signal and error correction. It is a good
program to run if you are in a heavy air traffic area and want to
generate megabytes of text within an hour.
73 Eric
- [Discuss-gnuradio] Mode S and ADS-B,
Eric A. Cottrell <=