How does frequency modulation assist in reducing ambiguity in radar signals?

Frequency modulation plays a critical role in radar systems by adding distinct characteristics to the transmitted signals. When radar employs frequency modulation, it varies the frequency of the transmitted signal over time, which allows the radar system to differentiate between targets that might be overlapping in time or space.

This modulation creates unique patterns that can be matched to the return signals from different targets, enabling the radar to isolate and identify them more effectively. For instance, even if two objects are in close proximity, the frequency changes can provide sufficient differentiation, reducing ambiguity. This is particularly important in environments with multiple potential targets, as it enhances the clarity and reliability of the radar returns, leading to better target detection and tracking.

While the other options touch on aspects of radar functionality, they do not address how frequency modulation specifically reduces ambiguity in targets. Increasing the speed of signal transmission or simplifying radar return signals do not inherently resolve issues related to multiple targets being detected simultaneously.