Modulator for implementation of amplitude modulation of many components
Abstract
The authors consider various anti-noise techniques in systems using digital signals, in particular QAM (quadrature amplitude modulation) signals. To increase the noise immunity of a system, it is proposed to use amplitude modulation of many components (AMMС). The advantages of this approach are demonstrated. The principles of AMMС signal formation are explained. The frequency efficiency, energy efficiency, and information efficiency of such signals are theoretically calculated. Different types of digital modulation are compared, the data being presented as a table, and a conclusion is made about a possible practical implementation of the modulator for AMMC signal formation.
Structural and functional diagrams of the modulator for AMMC implementation are proposed. The study formulates basic operating principles of such a device, which are used to propose a design option of the modulator. The paper describes particular aspects of creating the main units of the modulator. The authors investigate the characteristics of such a device, particularly the spectrum of the output signal.
The obtained research results allow drawing a conclusion that the device complies with the formulated implementation principles of the declared modulation type. A general conclusion is made that the manufactured modulator is suitable for the AMMC. The device is proposed to be used in modern digital communication systems, such as mobile communication systems.
References
Kamurthi R. T., Chopra Sh. R., Gupta A. Higher order QAM schemes in 5G UFMC system. 2020 International Conference on Emerging Smart Computing and Informatics (ESCI). Pune, India, 2020. https://doi.org/10.1109/ESCI48226.2020.9167619
Ortega-Ortega A. L., Bravo-Torres J. F. Combining LDPC codes, M-QAM modulations, and IFDMA multiple-access to achieve 5G requirements. 2017 International Conference on Electronics, Communications and Computers (CONIELECOMP). Cholula, Mexico, 2017. https://doi.org/10.1109/CONIELECOMP.2017.7891828
Neelam S. G., Sahu P. R. Error performance of QAM GFDM waveform with CFO under AWGN and TWDP fading channel. 2019 National Conference on Communications (NCC). Bangalore, India, 2019. https://doi.org/10.1109/NCC.2019.8732207
Solodovnick V. The algorithm of adaptive modulation and spatial multiplexing in multi-antenna wireless communication systems. Collection of scientific papers of the Military Institute of Telecommunications and Informatization, 2018, no. 3, pp. 103–111. (Ukr)
Sharma S. Digital Communications. India, S.K. Kataria & Sons, 2013.
Zheng B., Deng L., Sawahashi M., Kamiya N. High-order circular QAM constellation with LDPC coding rate for phase noise channels. 20th International Symposium on Wireless Personal Multimedia Communications (WPMC2017). Bali, Indonesia, 2017. https://doi.org/10.1109/WPMC.2017.8301807
Spasojevic P., Budisin S-Z. Uniquely generated paraunitary-based complementary QAM sequences. 51st Asilomar Conference on Signals, Systems and Computers. Pacific Grove, CA, USA, 2017. https://doi.org/10.1109/ACSSC.2017.8335659.
Staszek K., Gruszczynski S., Wincza K. Direct N-QAM multiport modulators utilizing bulter matrices. 21st International Conference on Microwave, Radar and Wireless Communications (MIKON), Poland, Krakow, 2016. https://doi.org/10.1109/MIKON.2016.7492123
Wei R-Y., Wang X-J. Differential 16-QAM and 16-APSK for uplink massive MIMO systems. IEEE Wireless Communications Letters, 2018, vol. 7, iss. 2, pp. 170–173. https://doi.org/10.1109/LWC.2017.2763143
Gorbatyy I. V. Amplitude modulation of many components. Collection of scientific papers of the G.E. Pukhov Institute for Modeling in Energy Engineering, 2009, iss. 50, pp. 186–190. (Ukr)
Gorbatyy I. V. Investigation of the technical efficiency of state-of-the-art telecommunication systems and networks with limited bandwidth and signal power. Automatic Control and Computer Sciences, 2014, № 1, pp. 63-75. https://doi.org/10.3103/s0146411614010039
Gorbatyy I. V., Bondarev A. P. Telecommunication systems and networks. Principles of operation, technologies and protocols. Ukraine, Lviv, Publisher House of Lviv Polytechnic National University, 2016. (Ukr)
Gorbatyy I. V., Chornii M. B. High efficiency telecommunication system based on amplitude modulation of many components. Visnyk (Official Gazette) of Lviv Polytechnic National University. Radioelectronics and Telecommunications, 2018, pp. 23–28. (Ukr)
Copyright (c) 2021 Ivan Horbatyi, Yurii Carp, Ivan Tsymbaliuk
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