====== Software Defined Radio ======

{{template>:project:infobox|
name=Software Defined Radio|
image=sdr-flow.png?200|
sw=-|
hw=-|
founder=brmlab collective|
interested=[[user:sargon]]\\ [[user:biiter]]\\ [[user:niekt0]]\\ [[user:pasky]]\\ [[user:nephirus]]\\ [[user:ruza]]\\ [[user:sysop]]\\ [[user:kiki]]\\ [[user:tlapka]] \\ [[user:mrkva]] \\ [[user:jenda]] |
status=active
}}
~~META:
status = active
&relation firstimage = :project:sdr-flow.png
~~


The goal of this project is to get education and experience in the complex field of SDR technology and build applications for reception and transmission of various signals.

//Předmětem řešení projektu je vytvoření nástrojů programového a elektronického
vybavení pro určení typu šifrované komunikace, její následné dekódování a vyvinutí nových
metod a nástrojů pro odhalování a vyšetřování případů kybernetické kriminality a ochrany
informačních systémů před kybernetickými hrozbami.//

 --[[http://www.pecina.cz/files/Informace_MV_bez_data.pdf|MVČR]]

Equipment:
  * rtl-sdr sticks
  * bladeRF with USB3
  * Several computers to provide reasonable DSP power
  * Aim to build distributed receiving cluster. Currently radios in brmlab, on brmlab rooftop and at Jenda's rooftop are available.
  * Various antennas (HF, discone, 2m and 70cm Yagi, 2m and 70cm dipole)
  * Satellite card and dish
  * CB and PMR walkie-talkies
  * advice related to Baofeng UV-5R radio

Ongoing activities:
  * [[user:jenda:gnuradio|GnuRadio advice]]
  * FM radio :)
  * [[project:gsm:start|GSM]]
  * [[project:sdr:tetra|Tetra]]
  * [[project:metro|Subway]]
  * [[project:tetrapol:start|Tetrapol]]
  * pagers, planes…
  * NOAA weather satellites
  * [[project:weathersonde:start|hunting for falling radio sondes]]
  * [[members:mikrofony|Microphone eavesdropping]]
  * [[project:sdr:fcl]]
  * [[user:jenda:kukuruku]]
  * [[project:sdr:szdc|Trains]]

Wanted topics:
  * DSP on GPGPU and FPGA
  * GNSS RX ant TX
  * RFID, KEELOQ, Mifare, BT, wifi hacking
  * BTS testing (tetra, DMR, APCO, D-star, matra, paging,… )
  * HAM HF CW and digimodes TRX
  * Passive and multistatic radars
  * Coherent scanners
  * TRBO cracker
  * Ponnies

==== Satellites ====

  * [[http://heavens-above.com/?lat=50.098404&lng=14.435963&loc=Prague&alt=254&tz=CET|Heavens above Brmlab]]
  * http://www.n2yo.com
  * {{:project:noaa.pdf|Úvod NOAA}}

===== Links =====
  * [[http://gnuradio.org/redmine/projects/gnuradio/wiki/Download|Gnuradio]] - DSP/SDR toolkit
  * [[https://github.com/pinkavaj/rtl-sdr/tree/gain|gain]] - patch for gr-osmosdr to set gain on F0012 tuner
  * [[http://wiki.spench.net/wiki/Gr-baz|gr-baz]] - contains alternatiobe Gnuradio sink for RTL2832U
  * [[http://www.oz9aec.net/index.php/gnu-radio/gqrx-sdr|gqrx]] - SDR receiver GUI in QT
  * [[https://svn.berlin.ccc.de/projects/airprobe/|airprobe]] - gnuradio based GSM decoding tool
  * [[http://www.kmitocty.cz/zaklady/tabulka2011.html]] - listening frequencies
  * [[http://old.avc-cvut.cz/avc.php?id=3622]] - FEL ČVUT course on digital cellular network (czech)
  * [[http://sdr.martinmarinov.info]]
  * [[http://people.xiph.org/~xiphmont/demo/neil-young.html|24/192 Music Downloads ...and why they make no sense]]
  * [[http://www.ni.com/white-paper/13193/en/|Understanding RF Radio Broadcast]]
  * [[https://wiki.xiph.org/Videos/Digital_Show_and_Tell|Digital Show and Tell]]
  * [[http://www.icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter]]
  * [[https://www.rtl-sdr.com/signal-identification-guide/]] RADIO SIGNAL IDENTIFICATION GUIDE
  * [[http://www.gnss-sdr.org/documentation/gnss-sdr-operation-realtek-rtl2832u-usb-dongle-dvb-t-receiver|GPS RX with rtl-sdr]]
  * [[http://lea.hamradio.si/~s53mv/navsats/theory.html|GPS/GLONASS RX with hardwired logic]]
  * https://github.com/Nuand/bladeRF/wiki/Signals---I-Q-Theory-Training
  * https://www.youtube.com/user/2011HPS/videos
  * [[http://homepages.paradise.net.nz/peterfr2/QAMidea/QAMidea.htm|The basic idea of digital QAM.]]
  * [[http://homepages.paradise.net.nz/peterfr2/QAMtiming/QAMtiming.htm]]
  * [[http://homepages.paradise.net.nz/peterfr2/QAM.htm|J-QAM]]
  * [[http://www.irrational.net/2014/03/02/digital-atv/|gr-dvbt]]
  * http://www.sigidwiki.com/wiki/Signal_Identification_Guide
  * [[https://github.com/tejeez/rtl_coherent|Coherent RLT-SDRs]]
  * [[https://github.com/mutability/mlat-server|Free implementation of RAMONA radar]] (yes, really)
  * [[https://github.com/osqzss/gps-sdr-sim|GPS network implementation]]
  * [[http://www.sidlo.com/ok1ufc/articles_cz.htm|Antenna bible]] (Czech)
  * [[https://www.urel.feec.vutbr.cz/MTRK/?%DAvod|Učebnice teorie rádiové komunikace]]
  * https://myriadrf.org/blog/digital-video-transmission-using-limesdr-gnu-radio/
  * http://www.dsplog.com/2010/04/12/non-coherent-demodulation-of-pi4-dqpsk-tetra/
  * [[http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorials|Guided GNU Radio Tutorials]]
  * [[http://i56578-swl.blogspot.cz/|HF utility/milcom monitoring and signals]]
  * http://drm.sourceforge.net/wiki/index.php/Main_Page
  * http://www.n5dux.com/ham/files/pdf/index.php
  * See also: [[:event:dsp#Zdroje|Digital Signal Processing#Zdroje]]

<code>
< Jenda`> https://www.youtube.com/watch?v=wv79DSqVi9w
< Muaddibdib> [wv79DSqVi9w] #195: RF Diplexer Basics: Tutorial, construction and tuning (11:59)
< Jenda`> https://www.youtube.com/watch?v=PuG8CCUbg58
< Muaddibdib> [PuG8CCUbg58] #204: Basics of Tunnel Diodes and their applications (19:08)
< Jenda`> https://www.youtube.com/watch?v=GvadQpkZ8l0
< Muaddibdib> [GvadQpkZ8l0] #260: RF Diode Mixer LO Drive Level & Conversion Loss | 1dB Compression | Distortion (8:47)
< Jenda`> https://www.youtube.com/watch?v=SS7z8WsXPMk
< Muaddibdib> [SS7z8WsXPMk] #60: Basics of Phase Locked Loop Circuits and Frequency Synthesis (22:12)
< Jenda`> https://www.youtube.com/watch?v=gw1TYWwfvGk
< Muaddibdib> [gw1TYWwfvGk] #274: Smith Chart Basics: Impedance and Admittance curves and conversion (11:30)
< Jenda`> https://www.youtube.com/watch?v=ImNRca5ecF0
< Muaddibdib> [ImNRca5ecF0] #275: Smith Chart: Z, VSWR, Reflection Coef and Transmission Line Effects (15:07)
</code>