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Understanding Amplitude Modulation: Processes, Schemes, and Real-Time Implementation

Amplitude Modulation (AM) is a key signal processing technique where the amplitude of a carrier signal adjusts in accordance with a message signal. This modulation allows information transmission over various media. The carrier frequency typically exceeds the message signal's highest frequency. Explore the AM signal's envelope, spectrum, and band structure through practical simulations. Learn about the implementation using DSK6713, including modulator and demodulator setups, as well as hands-on real-time environment configurations.

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Understanding Amplitude Modulation: Processes, Schemes, and Real-Time Implementation

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  1. Amplitude Modulation

  2. Amplitude Modulation • Amplitude Modulation is a process where the amplitude of a carrier signal is altered according to information in a message signal. • The frequency of the carrier signal is usually much greater than the highest frequency of the input message signal.

  3. AM – Basic Definitions (cont.) The Envelope: The AM Signal

  4. The AM Spectrum Carrier Side Bands

  5. AM Modulation Scheme + X

  6. Square-Law Demodulation

  7. Coeherent Demodulation X

  8. Hands-On • Simulation • Implementation using the DSK6713

  9. The Simulation Environment Virtual Scope Modulator Demodulator Information Signal Demodulated Signal

  10. The Simulation Environment

  11. Real Time Environment PC RTDX DSK6713 CODEC TMS320C6713 AM Modulator A/D (Right) D/A (Left) Signal Generator Line Out Line In AM Demodulator Line Out Line In D/A (Right) A/D (Left) Scope

  12. GUI

  13. SQRT Detector – Real Time

  14. Coherent Detection – Real Time

  15. Configurable Carrier

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