What parameter is used to determine range resolution in a RADAR system?

Range resolution in a RADAR system is determined primarily by the pulse width (PW). The pulse width is the duration of time that a RADAR pulse is transmitted. A shorter pulse width results in better range resolution because it allows the system to differentiate between two closely spaced objects or returns. When the pulse is brief, it can more accurately resolve the distance to targets that are near each other.

In contrast, a longer pulse width would result in less precise range data, as multiple targets could reflect the pulse simultaneously, effectively blending their returns into a single echo. Therefore, to achieve higher resolution and the ability to discern individual targets within a specific area, minimizing the pulse width is critical in RADAR applications.

Other parameters like peak power, pulse repetition interval (PRI), and the leading edge of the pulse play significant roles in RADAR functionality, but they do not directly determine the capability of resolving distances between targets. For example, while peak power affects the maximum range and detection capability of the system, it doesn't influence the resolution between closely spaced objects. Similarly, PRI pertains to how often pulses are sent rather than the resolution capability of each pulse itself. The leading edge of the pulse can indicate the start of the return measurement but is ultimately just a part