Radio

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General

AM

https://en.wikipedia.org/wiki/Amplitude_modulation

AM radio ranges from 535 to 1705 kilohertz, stations are possible every 10 kHz.

https://en.wikipedia.org/wiki/AM_broadcasting

https://github.com/fulldecent/system-bus-radio [2]

http://www.erikyyy.de/tempest/ - crt transmitter

FM

https://en.wikipedia.org/wiki/Frequency_modulation

FM radio ranges in a higher spectrum from 88 to 108 megahertz, stations are possible every 200 kHz.

https://en.wikipedia.org/wiki/FM_broadcasting

https://en.wikipedia.org/wiki/Radio_Data_System

http://www.keene.co.uk/

Radio Stations

UK radio stations on FM

http://www.radioreference.com/ RadioReference.com - Scanner Frequencies and Radio Frequency Reference
- http://wiki.radioreference.com/index.php/Main_Page - RadioReference.com is the world's largest radio communications data provider, featuring a complete frequency database, trunked radio system information, and FCC license data. RadioReference is also the largest broadcaster of public safety live audio communications feeds, hosting thousands of live audio broadcasts of Police, Fire, EMS, Railroad, and aircraft communications.

http://www.broadcastify.com/ - The world's largest source of public safety, aircraft, rail, and marine radio live audio streams

HFUnderground.com, aka the HFU. This site is dedicated to documenting longwave, mediumwave, and shortwave stations, including broadcasters, utility/military stations, pirate radio and spy numbers stations.

http://www.radionecks.com/ - pirate radio forum

http://www.otrrlibrary.org/

http://www.pri.org/

http://www.prx.org/

https://www.themarshallproject.org/2015/03/26/guerilla-radio [3]

Hearts of Space - long running syndicated space music show

http://www.ominous-valve.com/wlw.html [4]

BBC

http://www.bbc.co.uk/radio/

http://www.bbc.co.uk/worldservice/audioconsole/?stream=news_bulletin
BBC World Service: 5 minute update

BBC: Radio 1
BBC: Radio 3
BBC: Radio 4

BBC: Radio Scotland

BBC: World Service

http://www.bbc.co.uk/music/showcase/clips/justadded

NPR

NPR

HAM

https://en.wikipedia.org/wiki/Amateur_radio

https://wiki.edinburghhacklab.com/hams

http://hflink.com/alehamradio/ - ALE in Ham Radio

https://en.wikipedia.org/wiki/Automatic_Packet_Reporting_System

http://www.aprs.org/
- http://www.aprs.org/aprs-messaging.html

http://aprs.fi/

http://www.antenna.be/ [5]

https://www.morsecode.io/

http://linux.die.net/man/1/radio - in the xawtv package

http://arstechnica.com/gadgets/2016/06/when-everything-else-fails-amateur-radio-will-still-be-there-and-thriving/ [6]

Mobile phone

https://en.wikipedia.org/wiki/1G

https://en.wikipedia.org/wiki/2G

https://en.wikipedia.org/wiki/GSM

https://theintercept.com/2015/12/17/a-secret-catalogue-of-government-gear-for-spying-on-your-cellphone/

http://osmocom.org/

Building a portable GSM BTS using the Nuand bladeRF, Raspberry Pi and YateBTS (The Definitive and Step by Step Guide) [7]

https://en.wikipedia.org/wiki/3G

4G

https://en.wikipedia.org/wiki/4G

5G

http://analogictips.com/wide-band-instruments-in-the-5g-era/

RC

https://en.wikipedia.org/wiki/Radio_control

http://www.open-tx.org/ [8]

OpenSesame is a device that can wirelessly open virtually any fixed-code garage door in seconds, exploiting a new attack I've discovered on wireless fixed-pin devices. Using a child's toy from Mattel.

Data

https://en.wikipedia.org/wiki/Datacasting

https://en.wikipedia.org/wiki/File%3aRDS_vs_DirectBand_FM-spectrum2.svg

https://news.ycombinator.com/item?id=7160242

http://theappendix.net/issues/2014/7/the-invention-of-wireless-cryptography/

Software-defined radio

https://en.wikipedia.org/wiki/Software-defined_radio

Hardware

http://www.rtl-sdr.com/roundup-software-defined-radios/

FUNcube Dongle - originally designed with receiving signals from space
- http://adamsblog.aperturelabs.com/2013/03/you-can-ring-my-bell-adventures-in-sub.html

Whitebox Handheld SDR - Low power, embeddable framework; inspired by cell phone and SDR architectures [9]

Myriad RF is a family of open source hardware and software projects for wireless communications, and a community that is working to make wireless innovation accessible to as many people as possible.

LimeSDR board provides a hardware platform for developing and prototyping high-performance and logic-intensive digital and RF designs using Altera’s Cyclone IV FPGA and Lime Microsystems transceiver.
- https://github.com/myriadrf/LimeSDR-USB
- LimeSDR: Flexible, Next-generation, Open Source Software Defined Radio [10]

https://code.facebook.com/posts/1754757044806180/introducing-opencellular-an-open-source-wireless-access-platform [11]

https://www.ettus.com/product/details/UB210-KIT - 70MHz to 6GHz
- http://forums.xilinx.com/t5/Xcell-Daily-Blog/1100-FPGA-based-software-defined-radio-board-pranks-patrons-at/ba-p/443476

http://www.pervices.com/

RTL chipset

http://sdr.osmocom.org/trac/wiki/rtl-sdr - RTL-SDR is a set of tools that enables DVB-T USB dongles based on the Realtek RTL2832U chipset to be used as cheap software defined radios, given that the chip allows transferring raw I/Q samples from the tuner straight to the host device.

http://www.hamradioscience.com/rtl2832u-r820t-vs-rtl2832u-e4000/

The frequency range of the RTL2832U / E4000 is generally around 64MHZ to 1700MHz with a gap around 1100MHz to 1250MHz. The RTL2832U / R820T frequency range is 24MHZ to roughly 1850MHz with no gaps (found yet), and no DC offset spike.

RTL dongles have 2.4 MHz of useful bandwidth.

http://www.rtl-sdr.com/

http://www.rtlsdr.org/

http://superkuh.com/rtlsdr.html

https://wiki.archlinux.org/index.php/RTL-SDR

https://www.reddit.com/r/RTLSDR/
- https://www.reddit.com/r/RTLSDR/wiki/no_reception_quickstart

http://www.instructables.com/id/RTL-SDR-FM-radio-receiver-with-GNU-Radio-Companion/?ALLSTEPS

http://blog.opensecurityresearch.com/2012/06/getting-started-with-gnu-radio-and-rtl.html

YouTube: Decode APRS with RTL SDR (RTL2832U)

http://kmkeen.com/rtl-power/

Software

http://www.rtl-sdr.com/big-list-rtl-sdr-supported-software/

http://gnuradio.org/
- https://en.wikipedia.org/wiki/GNU_Radio

http://www.stargazing.net/david/GNUradio/index.html

http://www.jmalsbury.com/how-to-talk-to-a-36-year-old-spaaaaaace-probe-isee-3-with-gnu-radio-a-usrp-and-a-big-dish/

running the "volk_profile" gnuradio utility will detect and enable processor specific optimisations and will in many cases give a significant performance boost.

Gqrx is a software defined radio receiver powered by the GNU Radio SDR framework and the Qt graphical toolkit.
- https://github.com/csete/gqrx
- http://gqrx.dk/doc
- YouTube: Gqrx SDR

http://www.sm5bsz.com/linuxdsp/linrad.htm

LuaRadio is a lightweight, embeddable flow graph signal processing framework for software-defined radio. It provides a suite of source, sink, and processing blocks, with a simple API for defining flow graphs, running flow graphs, creating blocks, and creating data types. [12]

FreeDV - a Digital Voice mode for HF radio. You can run FreeDV using a free GUI application for Windows, Linux and OSX that allows any SSB radio to be used for low bit rate digital voice.

http://sdr.osmocom.org/trac/wiki/fosphor

https://sourceforge.net/projects/multimon/

https://github.com/EliasOenal/multimon-ng

Other

Identification Guide - wiki intended to help identify radio signals through example sounds and waterfall images. Most signals are received and recorded using a software defined radio such as the RTL-SDR, Airspy, SDRPlay, HackRF, BladeRF, Funcube Dongle, USRP or others.

Transmitting FM, AM, SSB, SSTV and FSQ with Just a Raspberry Pi [13]

SDR reception of Digital Amateur TV from the ISS

Telephony

http://openbts.org/
- - OpenBTS is a Unix application that uses a software radio to present a GSM air interface to standard 2G GSM handset and uses a SIP softswitch or PBX to connect calls. (You might even say that OpenBTS is a simplified form of IMS that works with 2G feature-phone handsets.) The combination of the global-standard GSM air interface with low-cost VoIP backhaul forms the basis of a new type of cellular network that can be deployed and operated at substantially lower cost than existing technologies in many applications, including rural cellular deployments and private cellular networks in remote areas.