Define 'signal-to-noise ratio' in the context of radar systems.

The concept of 'signal-to-noise ratio' (SNR) is pivotal in radar systems as it quantifies how much desired signal is present in relation to background noise. SNR is defined as the ratio of the power of the signal (the information being transmitted) to the power of the noise (unwanted interference or background signals). A higher SNR indicates a clearer signal and better performance of the radar system, as it means that the signal can be more easily distinguished from the noise.

In radar systems, maximizing the SNR is essential for reliable detection and tracking of targets. If the noise level is too high compared to the signal, it can lead to erroneous readings and an inability to detect the presence of objects effectively.

Understanding this definition is crucial because it highlights the importance of managing both the strength of the transmitted signal and the minimization of noise to improve radar performance and accuracy.