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235 Threads found on Iir Filter
speech signal digital processing. or google pre-emphasis filter often is a one-order iir filter.
Please give me some details on your current approach, I think I can help you a little bit. 1. Send me your filter coefficients. 2. Do you need strictly FIR filter for decimation? How about iir filter (nonlinear phase of course)? If you describe your problem, may be it is possible rewrite it in such a way, that (...)
Look at Microchip application notes section. There are examples for iir and FIR filters (I've forgtot wheter theay are for C or assembly). Good example in C is TI's introduction to oversamplig theory: . Here you will find implementation of Moving average low-pass filter for ADC.
i want to use my notch filter in altera stratix my altera do i have any option for that... in the userguide i read about FIR and iir filters but nothing about Notch filter...
Hi every one, I want to apply an iir filter like butterworth or chebyshev to a 2D signal(a digital image) but image processing toolbox in Matlab does not support iir filters. I dont know how to do that.Should I use an other toolbox? I will be thankfull if you give me an idea Thanks
MikroElektronika has released mikroPascal for dsPIC with examples for FIR, iir, FFT, IFFT and other DSP exotics: There is a free built in tool for FIR and iir filters with coefficients generator and frequency domain analysis (Main menu-> Tools-> filter D
Any idea why it is so difficult to get stable filter with fdatool from matlab? I'm designing iir BP filter for implementation in LatticeECP in audio domain, but I can't get decent signal out of the implemented filter. (very noisy signal) If I'm simulating the design in Matlab everything seems to be fine. Are there (...)
I am need of designing a loop filter for costas loop. I was said that loop filter is nothing but iir filter of order 2. For example costas loop to track 25khz carrier frequency with .02% crystal oscillator deviation. In this example a 6 bit nco is used. After lpf section on both arms and phase detection we get a vector (...)
Have a look at the Tyder website . Our software ONEoverT and Tyd-IP Code Generator will produce the VHDL for FIR. iir and other filters....completely synthesiable. There are a number of pdfs in the documentation link which show you some examples Regards Bob
Hi neoflash, As in any discrete-time system (not only iir filters) the sampler that converts from continuous time to discrete time must be preceded by an anti-alias filter (except in the case you are sure that there cannot be frequency components able to produce alias). After sampling, the system is unable to distinguish between the (...)
Hi Digital filter Design Guide. This is a good document to help you design high performance digital FIR and iir filters. Regards, Vishwa
borislee, Choose a FIR or iir filter to design. Choose a suitable sampling frequency. Choose the number of taps and coeffcients to determine the frequency response of your digital filter. Run simulation on Matlab-Simulink and make adjustment of your design. Implement it either using DSP Processor, FPGA/CPLD or Custom IC. If you (...)
FIR is almost impossible, iir maybe can....
I can't find a filter (iir or FIR) which can boost <100Hz 6db, while keep 100Hz-19000Hz flat as 0db. Could you help me? Thanks.
FIR filters were first done in analog with tapped delay lines. The problem with iir types in analog is the feedback speed. They could be done with sample and holds in the feedback loop to get the sampling effect. However this would not be as cost effective as the classical analog filter types. iir (...)
Hello am use 18F458 conect with AD12Bit, I want band pass frequency 50/60 so that , please provide a link, and tell me how to use it with about iir filter Thank you
Hi I am looking for some free software to design digital filters (iir). Thanks
Is your logic DSP alogorithm related? If it is (for example,iir filter) ,use clustered look-ahead , scattered look ahead method to translate the prototype algorithm to architecture. Generally, loop logic is not easilly pipelined.
how to improve the quality of motion detector? Added after 2 minutes: From many ref. I get some ideas: 1.use erosion-dilation filter. 2.5-tap median filter. 3.temporal iir filter Any one gives me more suggestion?
how to improve the quality of motion detector? Added after 2 minutes: From many ref. I get some ideas: 1.use erosion-dilation filter. 2.5-tap median filter. 3.temporal iir filter Any one gives me more suggestion?