.. note::
    :class: sphx-glr-download-link-note

    Click :ref:`here <sphx_glr_download_auto_examples_plot_2_4_group_delay.py>` to download the full example code
.. rst-class:: sphx-glr-example-title

.. _sphx_glr_auto_examples_plot_2_4_group_delay.py:


=================================
Group Delay Estimation of a Chirp
=================================

Constuct a chirp and estimates its `group delay
<https://en.wikipedia.org/wiki/Group_delay_and_phase_delay>`_.

Figure 2.4 from the tutorial.



.. image:: /auto_examples/images/sphx_glr_plot_2_4_group_delay_001.png
    :class: sphx-glr-single-img





.. code-block:: default


    from tftb.generators import fmlin
    from tftb.processing import group_delay
    import numpy as np
    import matplotlib.pyplot as plt

    signal, _ = fmlin(256)
    fnorm = np.linspace(0, .5, 10)
    gd = group_delay(signal, fnorm)
    plt.plot(gd, fnorm)
    plt.grid(True)
    plt.xlim(0, 256)
    plt.xlabel('Time')
    plt.ylabel('Normalized Frequency')
    plt.title('Group Delay Estimation')
    plt.show()


.. rst-class:: sphx-glr-timing

   **Total running time of the script:** ( 0 minutes  0.253 seconds)


.. _sphx_glr_download_auto_examples_plot_2_4_group_delay.py:


.. only :: html

 .. container:: sphx-glr-footer
    :class: sphx-glr-footer-example



  .. container:: sphx-glr-download

     :download:`Download Python source code: plot_2_4_group_delay.py <plot_2_4_group_delay.py>`



  .. container:: sphx-glr-download

     :download:`Download Jupyter notebook: plot_2_4_group_delay.ipynb <plot_2_4_group_delay.ipynb>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_