GPS may get the headlines, but several other short-range wireless-positioning methods play a huge role of their own in networks like Bluetooth and applications like electronic toll collection. This first-of-its-kind book brings all of these methods together in a single source, surveying each technique's theory of operation, advantages and disadvantages, and implementation procedures. It helps engineers to select the right technology for any application and ensure the best results possible. This one-stop resource covers fundamental principles and guides engineers, step by step, through radio signal time of flight methods, the signal strength method, the angle of arrival system, and the geometric use of distance measurement to determine location.