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 SM ISO690:2012МИХАЙЛОВ, Андрей. Анализ помехоустойчивости квадратурных методов модуляции при повороте сигнальных созвездий. In: Conferinţa tehnico-ştiinţifică a studenţilor, masteranzilor şi doctoranzilor, 26-29 martie 2019, Chișinău. Chișinău, Republica Moldova: 2019, Vol.1, pp. 9-12. ISBN 978-9975-45-588-6. |
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| Conferinţa tehnico-ştiinţifică a studenţilor, masteranzilor şi doctoranzilor Vol.1, 2019 |
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Conferința "Conferinţa tehnico-ştiinţifică a studenţilor, masteranzilor şi doctoranzilor" Chișinău, Moldova, 26-29 martie 2019 | ||||||
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The paper considers the effect of the rotation of the signal constellation on the noise immunity of quadrature multi-point modulation methods. Based on the error vector in the Matlab+Simulink simulation environment, models of M-QAM modulators and demodulators with rotation of the signal constellations at an arbitrary angle are proposed. Considered the most commonly used in digital data transmission systems modulation: 4-QAM, 16-QAM, 64QAM and 256-QAM. The simulation results of the proposed models confirmed the coincidence of the values of the rotation angles of the signal constellations recommended by the DVB-T2 standard, and also revealed the values of other angles that can be used to improve the noise immunity of multipositional quadrature modulation methods. |
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| Cuvinte-cheie error vector, noise immunity, signal constellation, quadrature reception, rotation of the signal constellation |
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