Software Defined Radio (SDR) mit Linux
Aus BraLUG-Wiki
Version vom 2. November 2014, 03:21 Uhr von Bergeruw (Diskussion | Beiträge)
...derzeit in Arbeit!
Inhaltsverzeichnis |
Was ist Software Defined Radio (SDR)?
...für den Anfang mal die Definition von Wikipedia zu SDR-
Hardware
Software
rtl-sdr
...
Installation (mit udev-Regel):
$ git clone git://git.osmocom.org/rtl-sdr.git ... $ apt-get update $ apt-get install cmake libusb-1.0-0-dev ... $ cd rtl-sdr $ mkdir build $ cd build $ cmake ../ -DINSTALL_UDEV_RULES=ON ... $ make $ sudo make install $ sudo ldconfig
In den meisten Fällen ist das automatische Laden des DVB-T-Treibers zu verhindern. Dazu muss eine Datei /etc/modprobe.d/rtlsdr.conf mit folgenden Inhalt (als root) angelegt werden:
blacklist dvb_usb_rtl28xxu
Test mit rtl_test:
$ rtl_test Found 1 device(s): 0: NOXON, DAB Stick, SN: 0 Using device 0: Terratec NOXON DAB/DAB+ USB dongle (rev 1) Found Fitipower FC0013 tuner Supported gain values (23): -9.9 -7.3 -6.5 -6.3 -6.0 -5.8 -5.4 5.8 6.1 6.3 6.5 6.7 6.8 7.0 7.1 17.9 18.1 18.2 18.4 18.6 18.8 19.1 19.7 Sampling at 2048000 S/s. Info: This tool will continuously read from the device, and report if samples get lost. If you observe no further output, everything is fine. Reading samples in async mode...
Test mit rtl_sdr:
$ rtl_sdr /tmp/capture.bin -s 1800000 -f 392000000 Found 1 device(s): 0: NOXON, DAB Stick, SN: 0 Using device 0: Terratec NOXON DAB/DAB+ USB dongle (rev 1) Found Fitipower FC0013 tuner Sampling at 1800000 S/s. Tuned to 392000000 Hz. Tuner gain set to automatic. Reading samples in async mode...
Radioempfang mit rtl_fm:
$ rtl_fm -M fm -s 64k -o 4 -A fast -l 0 -E deemp -f 106.2M | play -r 64k -t raw -e s -b 16 -c 1 -V1 - Warning: -o is very buggy Found 1 device(s): 0: NOXON, DAB Stick, SN: 0 Using device 0: Terratec NOXON DAB/DAB+ USB dongle (rev 1) -: (raw) Encoding: Signed PCM Channels: 1 @ 16-bit Samplerate: 64000Hz Replaygain: off Duration: unknown In:0.00% 00:00:00.00 [00:00:00.00] Out:0 [ | ] Clip:0 Found Fitipower FC0013 tuner Tuner gain set to automatic. Tuned to 106456000 Hz. Oversampling input by: 4x. Oversampling output by: 4x. Buffer size: 8.00ms Sampling at 1024000 S/s. Output at 64000 Hz. In:0.00% 00:00:22.78 [00:00:00.00] Out:1.45M [ =====|===== ] Hd:4.1 Clip:0
...und was nun damit anfangen?
"Automatic Dependent Surveillance Broadcast (ADS-B)" empfangen/darstellen
Flugzeuge gucken ;-)...
$ git clone git://github.com/MalcomRobb/dump1090.git ... $ cd dump1090.git $ make ... $ ./dump1090 --interactive --net
Im Browser:
http://localhost:8080/
Informationsquellen
- http://sdr.osmocom.org/trac/wiki/rtl-sdr
- http://superkuh.com/rtlsdr.html
- https://www.ccc-mannheim.de/wiki/DVB-T_Stick_als_SDR-Receiver
- http://floatblog.de/699/gnu-radio-und-rtl-sdr-sticks
- http://wiki.yobi.be/wiki/RTL-SDR
- http://donny.de/index.php/interessen/technik/funk/gnu-radio/59-installation-von-gnu-radio-unter-ubuntu
- http://donny.de/index.php/interessen/technik/funk/gnu-radio/61-ein-einfacher-radioempfaenger-mit-dem-gnu-radio-companion
- http://rtlsdr.org/
- http://www.rtl-sdr.com/
- http://www.reddit.com/r/RTLSDR/
- http://www.asciimation.co.nz/bb/2014/03/19/using-rtl-sdr-to-automatically-receive-weather-satellite-images
- http://www.andreas-zahnleiter.de/html/sdr.html
Antennen:
