Signal Modulation and Demodulation Techniques

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Implementation of AM, DSB, SSB, and VSB Signal Modulation and Demodulation with Code Examples

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This article examines modulation and demodulation techniques for AM (Amplitude Modulation), DSB (Double Sideband), SSB (Single Sideband), and VSB (Vestigial Sideband) signals. These fundamental communication system components facilitate efficient signal transmission and recovery. Modulation involves embedding information signals into carrier waves, while demodulation extracts original signals from modulated carriers. Through detailed analysis of these techniques, we explore their practical implementation using mathematical models and code examples. Key algorithm implementations include envelope detection for AM, coherent detection for DSB, phase-shift methods for SSB, and filter-based approaches for VSB. Understanding these methods enhances communication system optimization through MATLAB or Python implementations involving functions like hilbert() for SSB modulation and low-pass filtering operations for demodulation processes.

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