Software Implementation of Digital filters (original) (raw)
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Multimedia‐based analog and digital filter design
Computer Applications in Engineering Education, 1998
We describe a multimedia software package used to design analog and digital filters. This package needs Windows to operate and therefore, it is called WinFiltros. Several examples are included showing how it works. With WinFiltros, any student or practicing engineer should be able to complete an analog or digital filter design in a few seconds giving more attention to what it can be done with a filter instead of getting lost in endless cumbersome numerical calculations.
Lab VIEW modeling and simulation of the digital filters
—In order to study digital filters using virtual instrumentation, has developed a simulation program specifically designed for this purpose. Implemented program gives the user the following facilities: studying digital Butterworth filters, Cebyshev, Bessel and Median and change their parameters: bandwidth, order, rank and slope; possibility of changing the input parameters: amplitude, offset and frequency; overlay over the input signal, to one of the types of noise such as white noise, Gaussian white noise and Poisson noise; choosing a type of digital filters: low pass, high pass, band-pass and band stop; waveforms graphical representation of the input and output signals; graphical representation of the harmonics spectrum contained in the filtered signal.
Jurnal Penelitian Sains
Kata kunci: filter finite impulse response (FIR), graphical user interface (GUI), hanning, hamming, low pass filter ABSTRAK: Telah dibuat simulasi untuk melihat efek low pass filter (LPF) finite impulse response (FIR) dengan metode window Hanning dan Hamming, untuk membantu proses pembelajaran filter digital. Simulasi diwujudkan dalam bentuk Graphical User Interface (GUI) Matlab sebagai media peraga dan visualisasi output efek yang dimaksud. Masukan pada GUI berupa lagu dengan vokalis seorang Wanita yang akan menerima efek LPF FIR dengan parameter filter yaitu riak (ripple) pada passband sebesar 1 dB, Stop-band attenuation sebesar 60 dB, frekuensi cutoff sebesar 1024 Hz, frekuensi sampling low pass deep sebesar 33000 Hz dan low pass high sebesar 70000 Hz. Ketika lagu difilter dengan metode windowing akan mengeluarkan output suara yang lebih kecil dan jelas (seperti suara kartun Chip Munk) pada Hanning dan suara lebih besar namun teredam pada Hamming (seperti suara pria).
A package for filter design based on MATLAB
2001
Abstract Electric filters have a relevant importance in electronic systems because they are present in almost any electronic system. For example, communication systems, as many other electric systems, make intensive use of filtering to separate unwanted noise from the desired signal. Unfortunately, filter design is an intensive computational task requiring a significant amount of numerical calculations to obtain either the parameters of a filter transfer function or the element values for a filter circuit realization. This paper describes a software package whose purpose is to provide a tool to be used as a teaching aid in analog and digital filter design courses. The feature of this package is that it uses MATLAB [2] for the numerical computations. The main advantage of the filter design software package described in this paper is that makes uses of one of the MATLAB toolboxes, the signals toolbox (which is used for analog and digital filter design), but used with an interface that makes possible even to the novice user to readily design filters, either analog or digital, without any previous knowledge of MATLAB or the signals toolbox.
An Online Digital Filters and Sound Effects Laboratory Utilizing NI SPEEDY 33 and LabVIEW DSP Module
2011 Eighth …, 2011
There has been an increasing use and application of the internet due to the advances in technology. At Makerere University 1 , the internet has been used by students to remotely access and share scarce laboratory resources using the iLabs platform. This paper presents the design and implementation of an on-line laboratory that supports experimentation in Digital Filters and Sound Effects based on digital signal processing techniques. In the laboratory design, the National Instruments Signal Processing Educational Engineering Device for Youth (NI SPEEDY 33) is programmed to carry out the different processing on an applied signal at the input using the LabVIEW DSP Module. The input is an audio signal and the output is a modified audio signal whose wave form is be displayed at the client. The online laboratory is developed using the interactive iLabs Shared Architecture that allows more student interaction with the hard ware.
Applications of Digital Signal Processing through Practical Approach
2015
In this article, it is presented a practical approach to time-invariant digital filtering applications, through the design and development of a graphic user interface using the GUIDE tool and the Toolbox Signal Processing from the MATLAB software (version 2018). The importance of this work will be to provide students and professors of the Digital Signal Processing course, in the Electronics Engineering and Mechatronics Engineering careers, of the Ricardo Palma University in Lima-Peru, with an interactive tool to improve the teaching and understanding of the subject of digital filtering, allowing to choose from a total of 20 real signals sampled at 44100 Hz., such as voice, medical signal, music, among others, and using multiple options of filter types, cutoff frequencies, noise types, graphic representation of time and frequency, up to the sound reproduction of the signals before and after the filtering stage.
Labview-based laboratory environment for learning of filtering concepts
2011 6th IEEE International Symposium on Applied Computational Intelligence and Informatics (SACI), 2011
Better understanding of the acquired theoretical knowledge in the field of digital signal processing, for their successful use in future engineering practice, is achieved by introducing interactive laboratory experiments in the classroom. In this paper we present realization of LabVIEW virtual interactive DSP experiments and hardware DSP laboratory experiments on the NI-ELVIS II + development platform. These experiments can be used in the DSP lab for "visualization" of filtering concepts. For the purpose of "visualization", LabVIEW filter palette has been used for the procedure of band pass digital filter design and active band pass filter has been realized on the NI-ELVIS II+ developing platform. Theoretical characteristics of active band pass filter validated by measurements on realized hardware model. Keywords -band pass filter, filter characteristics, virtual experiments, hardware development platform, visualization of DSP theory I.
An analog filter design software package using Mathematica
Computer Applications in Engineering Education, 2000
In this paper a software package used to design analog filters is described. This filter design tool uses Mathematica from Wolfram Research as the numerical engine. This is called MathFilters. With this package, students or practicing engineers should be able to do an analog filter design in a few seconds, giving more attention to what it can be done with a filter instead of getting lost in endless cumbersome numerical calculations. Several examples showing how MathFilters works are included. This package runs on an IBM-compatible PC under Windows 95 with Mathematica 3.0.