This is a comprehensive textbook and reference that provides a solid
background in active sensing technology. Beginning with a historical
overview and an introductory section on signal generation, filtering and
modulation, it follows with a section on radiometry (infrared and
microwave) as a background to the active sensing process. The core of
the book is concerned with active sensing, starting with the basics of
time-of-flight sensors (operational principles, components), and goes
through the derivation of the radar range equation, and the detection of
echo signals, both fundamental to the understanding of radar, sonar and
lidar imaging. Several chapters cover signal propagation of both
electromagnetic and acoustic energy, target characteristics, stealth and
clutter. The remainder of the book involves the basics of the range
measurement process, active imaging with an emphasis on noise and linear
frequency modulation techniques, Doppler processing, and target
tracking.