openstb.simulator.distortion.doppler

Classes:

Name	Description
DopplerDistortion	Doppler distortion due to the movement of the platform.

DopplerDistortion

DopplerDistortion(calculate_c_rx=False)

Bases: Distortion

Doppler distortion due to the movement of the platform.

This distortion is performed as follows:

1. Calculate the speed of the transducers in the direction of the target (positive towards the target).

2. Calculate the Doppler scale factor n = (1 + v_rx/c) / (1 - v_tx/c).

3. Distort the spectrum according to S_d(f) = S(f/n) / sqrt(n).

Parameters:

Name	Type	Description	Default
calculate_c_rx	Boolean	If True, calculate the platform velocity at the reception time and position separately for each target. If False, use the platform velocity at the time and position the ping transmission started for all calculations.	False

Source code in openstb/simulator/distortion/doppler.py

def __init__(self, calculate_c_rx: bool = False):
    """
    Parameters
    ----------
    calculate_c_rx : Boolean
        If True, calculate the platform velocity at the reception time and position
        separately for each target. If False, use the platform velocity at the time
        and position the ping transmission started for all calculations.

    """
    self.calculate_c_rx = calculate_c_rx