Browse > Article
http://dx.doi.org/10.5909/JBE.2019.24.3.485

Implementation of Real-time Stereo Frequency Demodulator Using RTL-SDR  

Kim, Young-Ju (College of Electrical and Computer Engineering, School of Information and Communication Engineering, Chungbuk National University)
Publication Information
Journal of Broadcast Engineering / v.24, no.3, 2019 , pp. 485-494 More about this Journal
Abstract
A software-driven real-time frequency de-modulator is implemented with the aid of universal-serial-bus (USB) type software defined radio dongle. An analog stereo frequency modulation (FM) broadcast signal is down-converted to the basedband analog signal then converted to digital bit streams in the USB dongle. Computer software such as Matlab, Python, and GNU Radio manipulates the incoming bit streams with the technique of digital signal processing. Low pass filtering, band pass filtering, decimation, frequency discriminator, double sideband amplitude demodulation, phase locked loop, and deemphasis function blocks are implemented using such computer languages. Especially, GNU Radion is employed to realize the real-time demodulator.
Keywords
SDR; GNU Radio; RTL-SDR; discriminator; deemphasis;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Y. Kim, "Implementation of real-time FM de-modulator using software-defined radio," Journal of the Research Institute for Computer and Information Communication, Vol.26, No.1, pp.1-4, 2018.
2 http://files.ettus.com/tutorials/labs/Lab_1-5.pdf
3 J. Mitola, Software radios survey, critical evaluation and future directions. National Telesystems Conference, pp. 13-23, 1992.
4 T. Collins, R. Getz, D. Pu, A. Yuglinkski, Software Defined Radio for Engineers, Artecj Jpise. 2018.
5 https://osmocom.org/projects/rtl-sdr/wiki/Rtl-sdr
6 http://www.rtl-sdr.com/an-intro-to-rtl-sdr-technical-dsp-concepts-explained/
7 A. Oppenheim, R. Schafer, Discrete-time Signal Processing, Prentice Hall, 1989.
8 http://www.eas.uccs.edu/-mwickert/
9 http://wiki.gnuradio.org
10 https://wiki.gnuradio.org/index.php/Tutorials