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Improvement factor due to moving target indicator (MTI) processing

calculates the MTI improvement factor in dB given the number of pulses in an
(`IM`

= mtifactor(`M`

,`FREQ`

,`PRF`

)`M`

- 1) delay canceler, `M`

, the transmitted
frequency, `FREQ`

, and the pulse repetition frequency,
`PRF`

. This syntax assumes you are using coherent processing, a clutter
with mean velocity of 0 m/s, and a standard deviation in clutter spread of 2 m/s.

[1] Barton, David Knox. *Radar Equations for Modern Radar*. Artech House Radar Series.
Boston, MA. Artech House, 2013.