.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "auto_examples/plot_4_1_3_chirps_ambifunb.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

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

        Click :ref:`here <sphx_glr_download_auto_examples_plot_4_1_3_chirps_ambifunb.py>`
        to download the full example code

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_auto_examples_plot_4_1_3_chirps_ambifunb.py:


==============================================================
Narrow Band Ambiguity Function of Chirps with Different Slopes
==============================================================

This example demonstrates the narrow band ambiguity function (AF) of a signal
composed of two chirps with Gaussian amplitude modulation but havind linear
frequency modulations with different slopes. Note that the AF interference
terms are located away from the origin.

Figure 4.13 from the tutorial.

.. GENERATED FROM PYTHON SOURCE LINES 21-39



.. image-sg:: /auto_examples/images/sphx_glr_plot_4_1_3_chirps_ambifunb_001.png
   :alt: Narrow Band ambiguity function
   :srcset: /auto_examples/images/sphx_glr_plot_4_1_3_chirps_ambifunb_001.png
   :class: sphx-glr-single-img





.. code-block:: default


    from tftb.generators import fmlin, amgauss
    from tftb.processing.ambiguity import narrow_band
    import numpy as np
    import matplotlib.pyplot as plt

    n_points = 64
    sig1 = fmlin(n_points, 0.2, 0.5)[0] * amgauss(n_points)
    sig2 = fmlin(n_points, 0.3, 0)[0] * amgauss(n_points)
    sig = np.hstack((sig1, sig2))

    tfr, x, y = narrow_band(sig)
    plt.contour(2 * x, y, np.abs(tfr) ** 2, 16)
    plt.title('Narrow Band ambiguity function')
    plt.xlabel('Delay')
    plt.ylabel('Doppler')
    plt.grid(True)
    plt.show()


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

   **Total running time of the script:** ( 0 minutes  0.135 seconds)


.. _sphx_glr_download_auto_examples_plot_4_1_3_chirps_ambifunb.py:

.. only:: html

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


    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: plot_4_1_3_chirps_ambifunb.py <plot_4_1_3_chirps_ambifunb.py>`

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: plot_4_1_3_chirps_ambifunb.ipynb <plot_4_1_3_chirps_ambifunb.ipynb>`


.. only:: html

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

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