What does the term "ambiguity" refer to in radar systems?

In radar systems, "ambiguity" specifically refers to the challenges associated with distinguishing between multiple targets and accurately determining their exact distance and speed. This can occur when the radar signals reflect off multiple objects in such a way that it becomes difficult to interpret which returns belong to which targets. For instance, when two or more targets are at similar ranges or velocities, the radar may not be able to separate these signals effectively, leading to confusion or uncertainty in tracking them. This ambiguity makes it crucial for radar systems to utilize advanced signal processing techniques to clarify and differentiate between the targets to ensure accurate readings.

The other options discuss different aspects of radar operation but do not capture the essence of ambiguity. For example, processing multiple signals simultaneously is related to the radar's capability but does not inherently indicate ambiguity. Similarly, failing to detect any targets pertains to limitations in the radar's range or sensitivity rather than ambiguity in detected returns. Lastly, the precision of radar measurements addresses the accuracy of the data collected rather than the confusion or overlap that leads to ambiguity in target identification.