Software-defined radio (SDR) is transforming wireless communications through flexible, inexpensive devices that can be programmed to receive AM and FM broadcasts, transmit signals over Wi-Fi, monitor GPS location data, communicate with the International Space Station, and more. Field Expedient SDR provides a gentle introduction to this revolutionary technology. Its learn-by-doing approach will take you from total beginner to confident SDR practitioner, without the need for complex math or technical jargon. Working with intuitive, graphical software, you'll explore how SDRs work, and discover how to demodulate, filter, and tune analogue radio signals. Get hooked on an exciting new hobby!