Revista GTI

Vol. 15 No. 43 (2016): Revista GTI
Articles

Design and implementation of an efficient QAM modulator/demodulator module for GNU radio

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  • Orlando Arboleda-Molina,
  • Helmut Alexander Rubio,
  • Leandro Antonio Villa-Barona
Orlando Arboleda-Molina
Universidad Autónoma de Occidente
Bio
Helmut Alexander Rubio
Universidad Autónoma de Occidente
Bio
Leandro Antonio Villa-Barona
Universidad del Valle
Bio

Published 2017-10-11

Keywords

  • Software defined radio (SDR),
  • Digital modulation,
  • GNU Radio,
  • QAM

How to Cite

Arboleda-Molina, O., Rubio, H. A., & Villa-Barona, L. A. (2017). Design and implementation of an efficient QAM modulator/demodulator module for GNU radio. Revista GTI, 15(43), 63–77. Retrieved from https://revistas.uis.edu.co/index.php/revistagti/article/view/6821

Abstract

GNU Radio is a very popular free and open source development platform for SDR. It has generic digital signal processing blocks for QAM modulation and demodulation. In these blocks, mapping is done using constellations whose symbol-complex relationship is based on position within arrays provided, forcing user to insert each complex and symbol tidily. This improves the complexity in the modulation process but degrades it in demodulation. The present paper presents the design and implementation of an alternative modulator / demodulator module for GNU Radio, which provides symbol-to-complex mapping, complex-to-symbol mapping and variable order QAM modulation / demodulation blocks that increases efficiency in demodulation process and eliminates potential user error when constellation values are inserted in data array.

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