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| Scenario | Prefer Analog | Prefer Digital | |---|---:|---:| | Simple, low-cost audio link | ✔️ | | | Broadcast over noisy long-range channel | | ✔️ (if infrastructure allows) | | High fidelity audio with minimal degradation | | ✔️ (digital streaming) | | Legacy AM/FM radio | ✔️ | | | Modern cellular or Wi‑Fi | | ✔️ | | Low-latency control loops | ✔️ (sometimes) | ✔️ (with caution) |
: Step-by-step mathematical logic behind Pulse Code Modulation (PCM), Differential PCM (DPCM), Delta Modulation (DM), and Adaptive Delta Modulation (ADM).
: Explanations of the Nyquist sampling theorem, Aliasing, Pulse Amplitude Modulation (PAM), Pulse Width Modulation (PWM), and Pulse Position Modulation (PPM).
Communication systems form the backbone of modern technology, enabling everything from voice calls and radio broadcasts to high-speed internet and video streaming. Sanjay Sharma’s well-regarded textbook on communication systems presents clear explanations of both analog and digital techniques. This blog post distills core concepts and practical insights from that material into an approachable guide for students, engineers, and curious readers.
In this post, we will review why this book is essential, break down its contents, and discuss how you can utilize it for your studies.
: Detailed coverage of Amplitude Modulation (AM), including DSB-FC, DSB-SC, SSB-SC, and VSB, as well as Angle Modulation (FM and PM).