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98 Threads found on edaboard.com: Fir Iir Filter
there r lots, in iir as well fir this is one demo
I need to design this type of filter in matlab.....i tried iir fir all types equiripple and even used fdatools but did nt get linear transition region.....any other filter with this behaviour..thanks
i need to design a filter (any iir fir) with linear transition area(pass band to stop band)..... and also a high pass filter with the same...... any ideas...books what not.... Another thing......If a filter removes or attenuate (low attenuation) unwanted components.....how can i put it back...or amplify (...)
maybe you can do just an fir or iir filter with VHDL
U need to be more specific on wat tpe of filter bank u need like iir or fir attenuation required etc...
if u r interested only in extracting a particular band of frequencies have a look at lyons cochlear model. its a iir filter bank with just 2 nd order filters. u can google for Malcolm sanley or lyons cochlear model. Matlab also has a filterbank implementation function. but only fir. Regards Srinivas
Hello Rajhere when the problem is noise removal from a signal the first answer that everyone could give you is just filter that signal. You should add further information about your system: if it includes an ADC->DSP/FPGA->DAC processing chain you have a wide span of possible options (e.g. fir/iir digital (...)
One of the closest book you can try getting is Labview Digital Signal Processing and Digital Communication... However, there is only one chapter on fir and iir design... and is rather basic... not too sure if it is of help... Or else you could look up NI website... they do have some great tutorials in Labview... otherwise post at the user fo
fir is finite impulse response and hence it would be characterised by the absence of poles.... for the case of iir there would be poles......
Check moving average. It i sthe simplest fir, But it can be realized with iir structure eficiently . Can somone let me know it the moving average is actually fir or iir :-)
An AR filter is an iir filter where as MA is an fir filter
What kind of filter fir or iir? I think you should ask in the DSP/Signal processing forum. In Matlab there are functions that calculate the filter coefficients. You should provide the type, bandstop/notch for example the window type for fir or the filter type Butterworth, etc for (...)
vjfaisal, fir (Finite Impulse Response) filters are cosntructed using weighted sums of current and past samples of input data. . iir (Infinite Impulse Response) filters are cosntructed using weighted sums of current and past samples of data plus weighted sums of previous samples of output data. . The (...)
soheyl, At the risk of stating a broad generality; an iir filter will require fewer multiply-accumulate aperations than an fir filter of equivalent performance. An easy way to get a high performance notch filter is to transform an analog filter notch filter using the (...)
IS recursive filter iir,and transersal filter fir especially with taps?
iir filters have nonlinear phase. If you want linear phase, use a fir filter.
amriths04, It's not possible to compare the responses in general. What you can do is design an iir filter to meet a set of specifications. The design a fir filter to meet the same specifications. The compare the frequency and time domain responses. . Yes iir filters are realizeable. A (...)
No, it wont. Because fir filter is working in an open loop configuration. But iir filter uses a closed loop +ve feedback which will make it stable in certain regions only. But iir filters are compact than fir ones and requires few memory elements.
helo, can anyone show me some guidance to build a DSP filter (fir or iir) on altera FPGA?? im using FLEX 10K
of course, you can implementation iir as a fir filter, and only with one multiplier. such as y(n) = b(0)*x(n) + b(1)*x(n-1) + a(0)*y(n-1). You can use register store x(n), x(n-1) and y(n-1), and Time division using the multiplier, and accumulute three multiplier outputs to get y(n). After get y(n), replace y(n-1) register with y(n), and (...)
to achieve a sharp (brick wall) filter using fir filter, results in high order of filter but using an iir filter results in disturbed phase response. so you must trade off between your demands to design your desigered filter. its the art of filter design. (...)
DF-Design - Digital filter Design Program DF-Design is a fir and iir digital filter design/analysis program written in ISO/ANSI C, and being developed by Yoji Yamada laboratories of Ishikawa National College of Technology. Being as it was initially created as a tool to be used in
Dear Try filter Solutions. about filter Solutions : filter Solutions is a comprehensive PC based filter synthesis and analysis software package. filter Solutions provides passive and active circuit synthesis and modification analysis with parasitic effects, and digital filter (...)
I want to design a phase and amplitude compensation filter. Fisrt Problem is I want to design fir phase compensation filter , while matlab only support iir phase compensation, who know fir phase compensation filter design command? Another problem is for amplitude compensation, as I only (...)
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 (...)
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...
You could read this ebook: best regards
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 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 (...)
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.
Hi all, I have a quesiton that we know we can implement iir or fir filter in digital filter, but in analog filter, why we don't have this division? And, May we use SC filter to implement the iir or fir filter?
Hi Look at maxim site thay have a good app not regurding the use of iir and fir with there MAXQ controller all you have to do is to convert MAXQ assembly to PIC assembly All the best Bobi
dear all afriend of mine is implementing a digital filter fir or iir on atmel 8051 based family but he is not doing good can anyone give me some resorces (programs , data , simulators ) about that particular subject till now more than 36 viewed this subject but no one rplayed please help thanks first, you are
CIC always used for rate conversion. Can you elaborate your need for converting fir/iir to CIC?
Hi All, I am looking for a matlab script to design the classical pre-emphasis filter (fir, iir) with tau=50/70 usec. As it is knows, it is used in FM transmission. Thank you for your help. regards, --rs
use remez, or firls for fir filter or yulewalk for iir filter. these function can satisfy your needs. Good luck! Claint
first, you must know the preemphasis filter transfer function, then design the deemphasis filter transfer function!
Hi eda4you What thechnique for designing the fir filter are you using ? Do you just sample the continious impulse response? Canyou clearify? Note that by the name impulse invariance other technic is meant. This is just maping of the poles of the analog and digital filters. but this is for iir of course Regards elvis
This application note discuss the theory, concepts and implementation of fir/iir filters . Table of Contents SECTION 1 Introduction 1.1 Analog RCL filter Types 1-4 1.2 Analog Lowpass filter 1-5 1.3 Analog Highpass filter 1-9 1.4 Analog Bandstop filter 1-9 1.5 (...)
If you check the impulse response function,you can find cic is really a fir,so if comb's number is different to Integrator,the function will not be like that. You can refer this article: or find the ieee paper to get more information: Hogenauer, EB, "An Economical Class of Digital filters for Decimati
Hi: i am trying to make a fir filter like the Application Note 852 (iir fir filter) for a pic 18f458. I did everyhinh that the paper says but when i try to biuld my filter i have this errors: Error C:\FILTRODIG\fir_BUF.INC 2 : Directive only allowed when generating (...)
Hello sajeev_antony Maybe book "Digital Signal Processing with Field Programmable Gate Arrays" by Meyer-Baese will help you. CH3-fir digital filters Digital filters Designing fir filters Constant Coefficien fir Design Exercises CH4 - iir digital (...)
Please: I need design fir and iir Digital filter on PIC microcontroller. I need schematic and code.Please, I need any information. Thank you... :cry:
Hi all For long time I've used fir or iir filters (depend on application) for noise filtering. Last time I've found very interesting article ( ) and there is median filters proposed for temperature noise removal. I am thinking to use median filter in next application. Does anybody have (...)
Did anyone generate a correlated Rayleigh fading channel in research the receiver diversity? To generate a Rayleigh fading channel, one could first design a fir/iir filter to have the desired spectrum property, then let a white Gaussin noise pass through the filter. To generate a correlated Rayleigh fading (...)