The unique characteristic of the matched filter is that it produces the maximum achievable instantaneous Signal to Noise Ratios (SNR) at its output when a signal plus noise are present at its input. The radar ambiguity function represents the modulus of the matched filter output, and it describes the interference caused by the range and/or Doppler shift of a target when compared to a reference target of equal RCS. The radar ambiguity function is normally used by radar designers as a means of studying different waveforms. It can provide insight about how different radar waveforms may be suitable for the various radar applications. Plots of the ambiguity function are called ambiguity diagrams. For a given waveform, the corresponding ambiguity diagram is normally used to determine the waveform properties such as the target resolution capability, measurements accuracy and its response to clutter. Multiple ellipses in an ambiguity contour plot indicate the presence of multiple targets.