# Signal

 - [Foundations of Signal Processing](http://www.fourierandwavelets.org/) free book

 - [Getting started with HackRF and GNU Radio](https://github.com/mossmann/hackrf/wiki/Getting-Started-with-HackRF-and-GNU-Radio)
 - [Sniffing nRF24 with GNU Radio and HackRF](https://wiki.bitcraze.io/misc:hacks:hackrf)
 - [RFSec-ToolKit V 2.0](https://github.com/cn0xroot/RFSec-ToolKit) repo with a lot of info
 - [Signal identification guide](https://www.sigidwiki.com/wiki/Signal_Identification_Guide)

## Transmission lines

 - [Proper Termination for High-Speed Digital I/O Applications](http://www.ni.com/white-paper/3854/en/)
 - Transmission lines and reflections, tested [video](https://www.youtube.com/watch?v=y8GMH7vMAsQ)

## Modulation

 - https://electronics.stackexchange.com/questions/223430/operation-of-lc-circuit-in-frequency-modulation-with-simulation-and-linking-it-t
 - https://electronics.stackexchange.com/questions/343446/fm-tansmitter-ac-equivalent-circuit-capacitor-analysis
 - https://electronics.stackexchange.com/questions/204854/how-is-fm-modulation-is-achieved-using-a-single-bjt
 - https://electronics.stackexchange.com/questions/226694/boost-the-signal-of-an-fm-transmitter-using-an-emitter-follower-transistor
 - [AM/FM Transmitter schematics](http://darkliferadio.proboards.com/thread/15)
 - http://www.diy-electronic-projects.com/p121-4W-FM-Transmitter
 - https://www.allaboutcircuits.com/textbook/radio-frequency-analysis-design/radio-frequency-demodulation/how-to-demodulate-an-fm-waveform/
 - https://www.elttam.com.au/blog/intro-sdr-and-rf-analysis/ 

## Antenna

 - https://electronics.stackexchange.com/questions/73998/how-antenna-radiateshow-currents-flows-through-wire