SignalCraft: The Art and Science of Communication Systems

Introduction to Free-Space Optical Communication

In this episode, we explore the fundamentals of Free-Space Optical (FSO) Communication Systems—a powerful alternative to radio-frequency links that uses light to transmit data through the air. We’ll trace the history of FSO, break down key system types for indoor and outdoor applications, and compare FSO to traditional RF communication. You’ll learn how wavelength choice, link range, and modulation techniques shape FSO performance, and we’ll discuss emerging technologies like optical OFDM and coherent detection. Whether you're working in optical networks or curious about the future of high-speed wireless communication, this episode delivers a comprehensive technical overview of the FSO landscape.

Building the RF Link: Transmitter to Receiver

In this episode, we dive into the foundational elements of RF transceiver design, breaking down the complete signal chain from transmitter to receiver. We’ll explore how operating frequency choices affect system design, walk through the link budget step by step, and explain how real-world losses—from components to cables—shape the final received signal. Whether you're new to RF or looking to reinforce your fundamentals, this episode brings clarity to concepts like EIRP, free-space attenuation, receiver noise figure, and more. Tune in for a practical and structured walkthrough of what makes an RF link work.