B. Target resolution

A possible issue with target state measure is that a track related to closely spaced targets would be viewed as one true track. Assuming the sampling frequency *fs*, the carrier frequency *fc* and the speed of electromagnetic wave *c*, the range resolution is Δ*R c* <sup>2</sup> *fs* and the velocity resolution is <sup>Δ</sup>*<sup>v</sup> <sup>c</sup>*Δ*fd* <sup>2</sup> *fc* , where Δ*fd* denotes the Doppler shift resolution. We use mean square error (MSE) performance to define target resolution.
