Metadata-Version: 1.1
Name: pyfda
Version: 0.1rc1
Summary: pyFDA is a python tool with a user-friendly GUI for designing and analysing discrete time filters.
Home-page: https://github.com/chipmuenk/pyFDA
Author: Christian Muenker
Author-email: mail07@chipmuenk.de
License: MIT
Description: pyFDA

        *****

        

        Python Filter Design Analysis Tool

        ==================================

        

        pyFDA is a GUI based tool in Python / Qt for analysing and designing discrete time filters. The capability for generating Verilog and VHDL code for the designed and quantized filters will be added in the next release.

        

        .. image:: https://github.com/chipmuenk/pyFDA/raw/master/images/pyFDA_screenshot_3.PNG

            :width: 300px

        

        Prerequisites

        -------------

        

        Besides standard python libraries, the project builds on the following libraries:

        

        * numpy

        * scipy

        * matplotlib

        * docutils

        * pyQt4

        * Optional: xlwt and / or XlsxWriter for exporting filter coefficients as \*.xls(x) files

        

        

        Installing and starting pyFDA

        -----------------------------

        

            ``>> pip install pyfda``

        

        or download the zip file and extract it to a directory of your choice. Install it either to your ``<python>/Lib/site-packages`` subdirectory using

        

            ``>> python setup.py install``

        

        or run it where you have installed the python source files using (for testing / development)

        

            ``>> python setup.py develop``

        

        In both cases, start scripts ``pyfdax`` and `pyfdax_no_term` are created (with / without terminal).

        

        For development, you can also run pyFDA using::

        

            In [1]: %run -m pyfda.pyfdax # IPython or

            >> python -m pyfda.pyfdax    # plain python interpreter

        

            

        or run individual files from pyFDA using e.g.::

        

            In [2]: %run -m pyfda.input_widgets.input_pz  # IPython or

            >> python -m pyfda.input_widgets.input_pz     # plain python interpreter

           

        Customization

        -------------

        

        The layout and some default paths can be customized using the file ``pyfda/pyfda_rc.py``.

        

        Features

        --------

        

        * **Filter design**

            * **Design methods** from scipy.signal: Equiripple, Firwin, Butterworth, Elliptic, Chebychev 1 and Chebychev 2 

            * **Remember all specifications** when changing filter design methods

            * **Fine-tune** manually the filter order and corner frequencies calculated by minimum order algorithms

            * **Compare filter designs** for a given set of specifications and different design methods

            * **Filter coefficients and poles / zeroes** can be displayed, edited and quantized

        

        * **Clearly structured GUI**

            * only widgets needed for the currently selected design method are visible

            * enhanced matplotlib NavigationToolbar (nicer icons, additional functions)

        

        * **Common interface for all filter design methods:**

            * specify frequencies as absolute values or normalized to sampling or Nyquist frequency

            * specify ripple and attenuations in dB, as voltage or as power ratios

            * enter expressions like exp(-pi/4 * 1j) with the help of the library ``simpleeval`` (https://pypi.python.org/pypi/simpleeval) (included in source files)

        

        * **Graphical Analyses**

            * Magnitude response (lin / power / log) with optional display of specification bands, phase and an inset plot

            * Phase response (wrapped / unwrapped)

            * Group delay

            * Pole / Zero plot

            * Impulse response and step response (lin / log)

            * 3D-Plots (\|H(f)\|, mesh, surface, contour) with optional pole / zero display

        

        * **Modular architecture**, facilitating the implementation of new filter design and analysis methods

            * Filter design files not only contain the actual algorithm but also dictionaries specifying which parameters and standard widgets have to be displayed in the GUI. 

            * Special widgets needed by design methods (e.g. for choosing the window type in Firwin) are included in the filter design file, not in the main program

            * Filter design files can be added and edited *without* changing or even restarting the program

        

        * **Saving and loading**

            * Save and load filter designs in pickled and in numpy's NPZ-format

            * Export coefficients and poles/zeros as comma-separated values (CSV), in numpy's NPZ-format, in Excel (R) or in Matlab (R) workspace format

        

        * **Display help files** (own / Python docstrings) as rich text

        * **Runs under Python 2.7 and Python 3.3 ... 3.5**

        
Keywords: digital,discrete time,filter design,IIR,FIR,GUI
Platform: any
Classifier: Development Status :: 4 - Beta
Classifier: Intended Audience :: Developers
Classifier: Intended Audience :: Education
Classifier: Topic :: Scientific/Engineering
Classifier: Topic :: Education
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
