## Documentation Center |

**System object: **phased.ConstantGammaClutter**Package: **phased

Simulate clutter using constant gamma model

`Y = step(H)Y = step(H,X)Y = step(H,STEERANGLE)Y = step(H,X,STEERANGLE)`

` Y = step(H)` computes
the collected clutter return at each sensor. This syntax is available
when you set the

` Y = step(H,X)` specifies
the transmit signal in

` Y = step(H,STEERANGLE)` uses

` Y = step(H,X,STEERANGLE)` combines
all input arguments. This syntax is available when you configure

The clutter simulation that `ConstantGammaClutter` provides
is based on these assumptions:

The radar system is monostatic.

The propagation is in free space.

The terrain is homogeneous.

The clutter patch is stationary during the coherence time.

*Coherence time*indicates how frequently the software changes the set of random numbers in the clutter simulation.The signal is narrowband. Thus, the spatial response can be approximated by a phase shift. Similarly, the Doppler shift can be approximated by a phase shift.

The radar system maintains a constant height during simulation.

The radar system maintains a constant speed during simulation.

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