This document discusses software defined radio (SDR) technology. It begins with an overview of radio technology and terms. It then discusses SDR, explaining that it implements components like mixers, filters, and modulators/demodulators through software instead of hardware. Examples of low-cost SDR devices like the RLT-SDR are provided. The document concludes with a demonstration of listening to signals like FM radio, airplanes, satellites, and wireless networks using SDR software and devices.

1. Software Defined
Radio
Vikas
All your wireless devices belongs to me
!!

2. About me

3. Agenda
What is radio ?
Ham radio/unlicensed bands!
What is SDR ?
Tune your self with RLT-SDR to:-
lPlaying FM on your Laptop
Tracking Airplanes
Nova satellites(weather satellites)
may be GSM signals ;)

4. Radio
German physicist Heinrich Hertz (1857–1894) made the first electromagnetic
radio waves in his lab.

5. Few Terms
Transmitter
Receiver
Transceiver
Broadcast
Frequency
Spectrum
Bandwidth
Antenna

6. ISM Band

7. Ham Radio
Required to obtain a license if someone want to transmit radio
frequency .
License is granted by WPC in India.
Wireless Planning and Coordination Wing

8. Allowed HamRadio Frequencies

9. SDR
Software-defined radio (SDR) is a radio
communication system where components that
have been typically implemented in hardware
(e.g. mixers, filters, amplifiers,
modulators/demodulators, detectors, etc.) are
instead implemented by means of software on
a personal computer or embedded system.

10. Started by DoD
SPEAKeasy

11. SDR devices
RLT-SDR 24MHz-1700 MHz (receiver)
~$20
Hackrf 10MHz -6 GHz (transceiver)
~$300
Blade-RF 300MHz - 3.8GHz (both)
~$400
USRF 70 MHz -6 GHz (both)
~$1000

14. More you Listen more you know !!
No transmission, just listening…
No law breaking :)

15. Demo Time
FM listener

16. Demo Time
Air Radar System

17. Demo Time

18. Demo Time
Listening to wireless microphones

19. Demo Time
Listening to cordless phones

20. Demo Time
Finding bugs (spy devices) in your home ;)

21. Demo Time
Sniffing GSM/CDMA traffic

22. SDR software
Gnu-radio
grosmosdr
linrad
sdr#
hdsdr
gqrx
adsb-scope
rtl drivers

23. Thank you !!
Questions ??

24. References:-
http://www.arrl.org/
http://rlt-sdr.com/
http://greatscottgadgets.com/sdr/