Modeling 16-QAM in MATLAB and its implementation on Altera DE2-115

Authors: Amjad A.A.
Published in issue: #8(61)/2021
DOI: 10.18698/2541-8009-2021-8-727

Category: Informatics, Computer Engineering and Control | Chapter: System Analysis, Control, and Information Processing

Keywords: quadrature amplitude modulation (QAM), SNR, high frequency, controlled harmonic generator, FIR filter, Altera DE2-115 debug and education board, MATLAB, Qsys
Published: 03.09.2021

The article is devoted to the study and implementation of Quadrature Amplitude Modulation (QAM) on the Altera DE2-115 debug board. A definition of QAM modulation is given and various types of QAM constellations are mentioned. The principle of operation and the model of the transceiver are considered. The developed model describes the processing processes that take place in the receiver and transmitter. The implementation of 16-QAM in the MATLAB environment is considered, the influence of the choice of the FIR filter on the suppression of the received signal is shown. The model developed in the MATLAB simulation environment is implemented on the Altera development and educational board. The constructed model is tested, its output signals are shown. The implemented SDR allows the exchange of modulated data at a rate of 35 MHz.


[1] Winzer P.J., Gnauck A.H., Chandrasekhar S. et al. Generation and 1,200-km transmission of 448-Gb/s ETDM 56-Gbaud PDM 16-QAM using a single I/Q modulator. 36th Europ. Conf. and Exhibition on Optical Communication, 2010. DOI: https://doi.org/10.1109/ECOC.2010.5621371

[2] Makovejs S., Millar D.S., Mikhailov V. et al. Experimental investigation of PDM-QAM16 transmission at 112 Gbit/s over 2400 km. OFC/NFOEC, 2010. DOI: https://doi.org/10.1364/OFC.2010.OMJ6

[3] Kobayashi T., Sano A., Matsuura A. et al. 120-Gb/s PDM 64-QAM transmission over 1280 km using multi-staged nonlinear compensation in digital coherent receiver. OFC/NFOEC, 2011. DOI: https://doi.org/10.1364/OFC.2011.OThF6

[4] Vorob’yev O.V., Fokin G.A. [Radio communication systems model based design via software defined radio]. V Mezhd. nauch.-tekh. i nauch.-metod. konf. Aktual’nye problemy infotelekommunikatsiy v nauke i obrazovanii. T. 2 [V Int. Sci.-Tech. and Sci.-Method. Conf. Actual Issues of Infotelecommunications in Science and Technology. Vol. 2]. Sankt-Petersburg, SPbGUT Publ., 2016, pp. 280−284 (in Russ.).

[5] Fokin G.A Principles and technologies of digital communication based on software defined radio: a review of modern trends in the field of creating a curricculum. Trudy uchebnykh zavedeniy svyazi [Proceedings of Telecommunication Universities], 2019, vol. 5, no. 1, pp. 78–94. DOI: https://doi.org/10.31854/1813-324X-2019-5-1-78-94 (in Russ.).

[6] Shannon C.E. A mathematical theory of communication. Bell Syst. Tech. J., 1948, vol. 27, no. 3, pp. 379–423. DOI: https://doi.org/10.1002/j.1538-7305.1948.tb01338.x

[7] Yoshida M., Omiya T., Kasai K. et al. Real-time FPGA-based coherent optical receiver for 1 Gsymbol/s, 64 QAM transmission. OFC/NFOEC, 2011. DOI: https://doi.org/10.1364/OFC.2011.OTuN3

[8] Koizumi Y., Toyoda K., Yoshida M. et al. 1024 QAM (60 Gbit/s) single-carrier coherent optical transmission over 150 km. Opt Express, 2012, vol. 20, no. 11, pp. 12508–12514. DOI: https://doi.org/10.1364/OE.20.012508

[9] Kasai K., Hongo J., Goto H. et al. The use of a Nyquist filter for reducing an optical signal bandwidth in a coherent QAM optical transmission. IEICE Electron. Expr., 2008, vol. 5, no. 1, pp. 6–10. DOI: https://doi.org/10.1587/elex.5.6

[10] Huang M.-F., Qian D., Ip E. 50.53-Gb/s PDM-1024QAM-OFDM transmission using pilot-based phase noise mitigation. OECC, 2011. URL: https://ieeexplore.ieee.org/document/6015357

[11] Mizuochi T. Recent progress in forward error correction for optical communication systems. IEICE Trans. Comm., 2005, vol. E88-B, no. 5, pp. 1934–1946. DOI: http://dx.doi.org/10.1093/ietcom/e88-b.5.1934

[12] FIR Compiler II user guide. Altera, 2014.