Freeware Downloads for "Filter Signal"
- 1D Gaussian lowpass filter
- License: Freeware

This function returns coefficients of Gaussian lowpass filter. Advantages of Gaussian filter: no ringing or overshoot in time domain. Diasadvantage: slow rolloff in frequency domain. Pass SR=sampling rate, fco=cutoff freq, both in Hz, to the function. Coefficients for FIR filter of length L (L always odd) are computed. This symmetric FIR filter of length L=2N+1 has delay N/SR seconds. Examples of use: Compute Gaussian filter frequency response when SR=1000,fco=50 Hz: freqz(gaussfiltcoef(1000,50),1,256,1000); Filter signal X sampled at 5kHz with Gaussian filter with fco=500: y=filter(gaussfiltcoef(5000,500),1,X); SR,fco are not sanity-checked.
- Platform: Matlab, Scripts
- Publisher: William Rose
- Date: 26-01-2013
- Size: 10 KB
- New Block Library Simulink called The Phase Filter
- License: Freeware

It is a new block simulink signal library called the Phase Filter.The transfert function is F(p)=(1+T1p)/(1+T2p).Students can change parameters T1 and T2 time constants of filter.The phase filter in automatic control is for Corrector block and also in PLL oscillator application..
- Platform: Matlab, Scripts
- Publisher: Dit Papa Lamine ndao
- Date: 26-06-2013
- Size: 10 KB
- Find optimal FIR Wiener filter for multiple inputs
- License: Freeware

MISO_FIRWIENER(N, X, Y) computes the optimal FIR Wiener filter of order N, given any number of (stationary) random input signals as the columns of matrix X, and one output signal in column vector Y. Requires BLOCK_LEVISON.M, also on the file exchange. By Keenan Pepper; uploaded with permission..
- Platform: Matlab, Scripts
- Publisher: Tobin Fricke
- Date: 01-04-2013
- Size: 10 KB
- Wiener Filter
- License: Freeware

Wiener Filter for Noisy Speech Enhancement, implemented as proposed by Scalart 1996. Uses a decision directed method to track the a priori SNR. Note that the first 0.25sec of the signal is used to model the noise, that is, it is assumed that speech starts after that 0.25sec.
- Platform: Matlab, Scripts
- Publisher: Esfandiar Zavarehei
- Date: 15-02-2013
- Size: 10 KB
- Fixed-point signal processing in M
- License: Freeware

Functions accompanying MATLAB News & Notes article "Fixed-point Signal Processing: Getting Started" by Darel A. Linebarger and Thomas A. Bryan, 2004. The functions include an FIR filter in M that can be run in fixed-point and floating-point..
- Platform: Matlab, Scripts
- Publisher: Tom Bryan
- Date: 16-06-2013
- Size: 10 KB
- Boc & C/A multipath error envelope
- License: Freeware

The multipath performance of a given signal/receiver combination depends on various signal and receiver parameters like signal type/modulation scheme pre correlation bandwidth and filter characteristics, chipping rate of code ,relative power levels of multipath signals ,chip spacing between correlators and type of discriminator used for tracking. For the following analyses the influence of code multipath will be illustrated by means of multipath error envelopes. In these diagrams, the resulting ranging errors are plotted as a function of geometric path delay .
- Platform: Matlab, Scripts
- Publisher: rahmouni
- Date: 19-01-2013
- Size: 10 KB
- Speech Signal Processing Toolkit (SPTK)
- License: Freeware

SPTK is a suite of speech signal processing tools for UNIX environments, e.g., LPC analysis, PARCOR analysis, LSP analysis, PARCOR synthesis filter, LSP synthesis filter, vector quantization techniques, and other extended versions of them..
- Platform: WinOther
- Publisher: sp-tk.sourceforge.net
- Date: 07-10-2012
- Size: 632 KB
- DTMF Encoder/Decoder (Generation/Detection)
- License: Freeware

Generation of signal with extra parameters Detection using; Fast Fourier Transform Algorithm Goertzel Algorithm Digital Filtering (FIR Filter bank).
- Platform: Matlab, Scripts
- Publisher: Muhammad Azeem Azam
- Date: 22-06-2013
- Size: 61 KB
- Multitarget Bearing Only Tracking by Particle Filter
- License: Freeware

A fast implementation of particle filter dedicaced to multitarget tracking with bearing only measurements. For the multitarget data association problem, a gibbsampler is used to estimate target association probabilities. Ref : "Sequential Monte-Carlo methods for multple target tracking and data fusion" , Carine. Hue, Jean-Pierre Le Cadre and Patrick Perez, IEEE Transactions on Signal Processing , Vol 50, no 2, 2002 Please mexme_mtbot to compile mex-files on your own plateform. Run demo_mtbot.m for the demo.
- Platform: Matlab, Scripts
- Publisher: Sebastien Paris
- Date: 11-03-2013
- Size: 113 KB
- Buffering and taking the mean of the buffer contents
- License: Freeware

This could be very useful model when used in signal processing. I have implemented this to filter the disturbances in my ADC signals in my programming and it works good..
- Platform: Matlab, Scripts
- Publisher: Prashant Sandhi
- Date: 18-05-2013
- Size: 10 KB
- H-infinity optimal causal IIR inverse filter for the cubic spline
- License: Freeware

Computes the H-infinity optimal causal filter (indirect B-spline filter) for the cubic spline. [INPUT] d: delay [OUTPUT] psi: the optimal filter psi(z) in a TF object gopt: optimal value This file is based on the following paper: M. Nagahara and Y. Yamamoto, H-infinity optimal approxmation for causal spline interpolation, Signal Processing, Vol. 91, No. 2, pp. 176-184, 2011..
- Platform: Matlab, Scripts
- Publisher: Masaaki Nagahara
- Date: 13-06-2013
- Size: 10 KB
- Audio Noise Gate for Texas Instruments C5510 / C6713
- License: Freeware

Used on cellular phones to filter out background noise. Measure the signal to noise ratio of an audio input in realtime. Pass speech but give silence where the input is noise (hiss, snap crackle and pop). Includes a tutorial on how to use statistics (correlation coefficient) to calculate the signal to noise ratio. Realtime implementation using Texas Instruments TMS320C5510 DSK and TMS320C6713 DSK. Code mostly in C, except where it would be too slow and assembly language is used..
- Platform: Matlab, Scripts
- Publisher: richard sikora
- Date: 18-03-2013
- Size: 1055 KB
- Interactive Fourier Filter
- License: Freeware

A fourier filter for time-series signals. Version 1.5, May 4, 2007, is calibrated specifically for time-based signals. Does not require the Signal Processing Toolbox. By adjusting the parameters, you can create lowpass, highpass, bandpass, and bandreject (notch) filters with variable cut-off rate. There is an interactive version with sliders that allows you to adjust the filter parameters continuously while observing the effect on your signal dynamically. See: http://www.wam.umd.edu/~toh/spectrum/Inter.
- Platform: Matlab, Scripts
- Publisher: Tom O'Haver
- Date: 16-06-2013
- Size: 20 KB
- rms_exp.m
- License: Freeware

Calculates exponential averaged RMS of a signal using the specified windowlength as the time constant. Useful for computing sound pressure level from microphone data. Uses digital filter. Much faster than cumsum..
- Platform: Matlab, Scripts
- Publisher: Scott Copeland
- Date: 23-04-2013
- Size: 10 KB
- System identification through the LMS algorithm
- License: Freeware

This is a simple, yet powerful LMS implementation that offers a multiple input signal selection, and the ability to insert a filter in cascade with the tunable filter in order to achieve "filter matching". For more information, please consult the comments in the source..
- Platform: Matlab, Scripts
- Publisher: Liviu
- Date: 22-04-2013
- Size: 10 KB
- Hybrid Filter Banks with Fractional Delays: Minimax Design and Applications to Multichannel Sampling
- License: Freeware

MATLAB Implementation and demo to design of filters in a hybrid FB with fractional delays. The theory is described in the paper: Ha T. Nguyen and Minh N. Do, Hybrid filter banks with fractional delays: Minimax design and application to multichannel sampling, IEEE Transactions on Signal Processing, vol. 56, no. 7, pp. 3180-3190, July 2008.
- Platform: Matlab, Scripts
- Publisher: Ha Nguyen
- Date: 05-06-2013
- Size: 10 KB
- Match n Freq
- License: Freeware

Pulse shaping filter program that finds the pole-zero locations of a transfer function, H(s), for a matched filter. H(s) equals a -desired- signal (Yout) divided by a given input signal (Yin). Both Yout and Yin are functions of frequency. Group delay may also be calculated to compliment a given data set, thus, providing a flat group delay. Minimizing Intersymbol Interference in a read/write channel for disc drives by shaping and slimming an isolated readback pulse was the main objective for writing this program.
- Platform: Windows
- Publisher: Optimal Designs Enterprise
- Date: 25-04-2019
- Size: 6725 KB
- Cactus Spam Filter
- License: Freeware

Cactus Spam Filter is a free easy-to-use spam blocker. It protects your inbox by learning to detect spam as it's being used. After a short while it has adapted to your personal mailbox and blocks out most of the junk e-mail. Since the filter becomes personal, spammers will not be able to fool it. Installation is very simple. No setup is required in your e-mail client; this spam stopper integrates seamlessly with all e-mail clients that use POP3. It has been successfully tested with Microsoft Outlook, Microsoft Outlook Express, Netscape, Opera, Mozilla, Eudora, IncrediMail, Pegasus Mail, Foxmail and Phoenix Mail.
- Platform: Windows
- Publisher: Codeode / Bysoft Data AB
- Date: 21-09-2004
- Size: 550 KB
- NetDog Internet Porn Filter
- License: Freeware

NetDog Internet Porn Filter,Block Internet porn easily! Special Intelligent content Filtering Engine blocks porn contents on the Internet. The content filtering engine examines in real-time all the data (such as Web sites, e-mails, net chat contents, FTP, P2P) being transmitted and received through any Internet applications automatically. NetDog also can block URLs which you have defined.(supports WildCard Characters '?' and '*' in URL, also you can define a word such as "porn", that means all URLs contain word "porn" will all be blocked).
- Platform: Windows
- Publisher: NetDogSoft
- Date: 07-02-2006
- Size: 583 KB
- Atomic TLD Filter
- License: Freeware

Atomic Top Level Domain Filter (ATLDF) is a software program that allows users to automatically select certain e-mail addresses from the list, based on the professional or national basis. When is it necessary and who needs it? Just a simple example - in order to get maximum return from your marketing campaign, you need to split your mailing list into specific target groups and optimize your message for each one. This is when ATLDF comes in handy, separating emails into these groups - for example, .
- Platform: Windows
- Publisher: AtomPark Software
- Date: 30-01-2007
- Size: 652 KB
Filter Signal: Freeware | All




