preprocess
==========

A preprocess modifies channel data before beamforming.

| **Input:** ``channel_data`` |rarr| **Output:** ``channel_data``

.. autoclass:: preprocess.demodulation
   :members:

.. autoclass:: preprocess.fast_demodulation
   :members:

.. autoclass:: preprocess.hilbert_transform_demodulation
   :members:

.. autoclass:: preprocess.nyquist_limit_demodulation
   :members:

.. autoclass:: preprocess.refocus
   :members: