Define "signal processing" in RADAR technology.

Signal processing in RADAR technology refers to the method of analyzing and interpreting the RADAR signals that are reflected back to the system after they bounce off objects, such as vehicles. This process is fundamental because it allows the RADAR system to detect, identify, and track the position and speed of these objects accurately.

In essence, signal processing involves employing various algorithms and techniques to filter out noise, enhance the quality of the received signals, and extract meaningful information from them. This is critical in determining the speed of moving objects and assessing the environmental context, helping operators make informed decisions based on real-time data.

The other options do not capture the comprehensive role of signal processing. Some may touch on related aspects but do not accurately define the broader application of signal processing in RADAR systems. For instance, focusing solely on physical structure or calibration misses the essential task of interpreting the signals themselves, which is core to effective RADAR operation.