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D igit a l Modul a tion B a si c s – Part 2

D igit a l Modul a tion B a si c s – Part 2. Lab 4 – 2019/1440. By: Elham Sunbu. OUTLINE. Quadrature Amplitude Modulation (QAM) 16QAM. Quadrature Amplitude Modulation (QAM). Quadrature Amplitude Modulation. How can the data rate be increased further?

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D igit a l Modul a tion B a si c s – Part 2

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  1. Digital Modulation Basics – Part 2 Lab 4 – 2019/1440 By: Elham Sunbu

  2. OUTLINE • Quadrature Amplitude Modulation (QAM) • 16QAM

  3. Quadrature Amplitude Modulation (QAM)

  4. Quadrature Amplitude Modulation • How can the data rate be increased further? • A combination of modulation techniques that change two characteristics of a carrier at the same time. • The most sophisticated technology combines ASK and PSK • One of such is known as Quadrature Amplitude Modulation (QAM) or Quadrature Amplitude Shift Keying (QASK). • the approach uses both change in phase and in amplitude • To represent QAM on a constellation diagram • We use distance from the origin as a measure of amplitude • Figure 10.8 shows the constellation diagram for a variant known as 16QAM with dark gray areas indicating the amplitudes .

  5. Quadrature Amplitude Modulation .

  6. Simulink

  7. Settings

  8. Settings

  9. OUTPUT

  10. Thank You

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