On May 23, 8:11 am, "c1910" wrote: > hi, > i'm very new with DSP FIR. > i need to make a Bandpass filter with FIR design. first, i use...

On May 23, 8:11 am, "c1910" wrote: > hi, > i'm very new with DSP FIR. > i need to make a Bandpass filter with FIR design. first, i use the AM > signal for the input, then i want to get the information signal by > filtering the AM signal. > The problem is to get the value of transfer function of the FIR filter, i > need a mathematical equation, > i don't know where to

hi, i'm very new with DSP FIR. i need to make a Bandpass filter with FIR design. first, i use the AM signal for the input, then i want to get...

hi, i'm very new with DSP FIR. i need to make a Bandpass filter with FIR design. first, i use the AM signal for the input, then i want to get the information signal by filtering the AM signal. The problem is to get the value of transfer function of the FIR filter, i need a mathematical equation, i don't know where to start and what equation or theory to use?! can you give me an equation to ...

Hi folks, I am looking for literature that describes either the TX or RX (or both) chains for a software radio with the following (ideal)...

Hi folks, I am looking for literature that describes either the TX or RX (or both) chains for a software radio with the following (ideal) constraint: the radio uses digital FIR filters (post ADC/pre DAC) that operate between 100MHz and 300MHz (maybe a singlerate FIR or an FIR that interpolates into this range or a decimation FIR that downsamples from this range). Failing that, any li...

I have a basic doubt regarding FIR Filter implementation. The input to my FIR filter is the data(16-bit out from ADC sampled at 20 KHz). i.e...

I have a basic doubt regarding FIR Filter implementation. The input to my FIR filter is the data(16-bit out from ADC sampled at 20 KHz). i.e this data represents the amplitude of the sampled input signal. My doubt is "whether the output of the FIR filter denotes the amplitude or frequency of the filtered data? Please clarify Regards, Nitesh

Hello, i am looking for an algorithme in C in order to generate Parks-McClellan FIR filter. I found one...

Hello, i am looking for an algorithme in C in order to generate Parks-McClellan FIR filter. I found one at "http://www.menne-biomed.de/". I want to know if someone has already use this type of algorithme ? Is there another available ? Is generated FIR coeficients are good ? thanks for your help

Hello everyone, Can anyone tell me if there is a known way to find the inverse of a given FIR filter? The idea is that given some signal...

Hello everyone, Can anyone tell me if there is a known way to find the inverse of a given FIR filter? The idea is that given some signal y(x), and an FIR filter f(x), I want to find a way to compute g(x) which is the inverse of f(x) such that: y(x) * f(x) * g(x) = y(x). (* = convolution) Meaning if I have some signal, I can apply an FIR filter to shape it then apply ...

Hi, I would like to apply a FIR filter to my frequency sample array. Specifically, I want to use a band-pass filter against my data, but...

Hi, I would like to apply a FIR filter to my frequency sample array. Specifically, I want to use a band-pass filter against my data, but I'm pretty new to DSP and I'm not sure exactly how to integrate this. First, I have a complex array of frequency data (real, imaginary). Second, I've used a FIR design program to come up with the following information: -Rectangular window FIR filter ...

Dear all, I want to model multipath channel. Why multipath channel can modelled as Finite Impulse Response (FIR) filters (what is the...

Dear all, I want to model multipath channel. Why multipath channel can modelled as Finite Impulse Response (FIR) filters (what is the relationship between FIR filters and multipath channel)? and how to model it as FIR filters? Thank you very much. Best wishes, estdev

Is it possible to perform an FIR filter on 8 bit digital data using only the simplest tools? Like an 8bit MCU with very limited RAM? How can I...

Is it possible to perform an FIR filter on 8 bit digital data using only the simplest tools? Like an 8bit MCU with very limited RAM? How can I generate very low level code from an FIR filter so I can translate it into assembler for the MCU I am using? I am thinking of using the Atmel ATTINY13. An FIR filter is just a sequency of steps, albiet lots of steps, and even more steps if you cant ...

On May 23, 8:11 am, "c1910" wrote: > hi, > i'm very new with DSP FIR. > i need to make a Bandpass filter with FIR design. first, i use...

On May 23, 8:11 am, "c1910" wrote: > hi, > i'm very new with DSP FIR. > i need to make a Bandpass filter with FIR design. first, i use the AM > signal for the input, then i want to get the information signal by > filtering the AM signal. > The problem is to get the value of transfer function of the FIR filter, i > need a mathematical equation, > i don't know where to

I am try to implement a FIR bandpass filter in C2000 DSP. I got the coefficients from FDATOOL order=10; % FIR filter order fs:=500 HZ, %...

I am try to implement a FIR bandpass filter in C2000 DSP. I got the coefficients from FDATOOL order=10; % FIR filter order fs:=500 HZ, % sampling frequency fp1=60HZ, % fp2=100HZ, % fstop1=20HZ, fstop2=140HZ, ... Then I got the coefficients, And I muliply 32767 to make them Q15 format due to the need of the FIR.asm provide by TI 24x filter library. It's: #define FIR_BPF10 {\...

Hi all, I have used remez function to design a 1D FIR filter and converted it to a 2D FIR filter using ftrans2. However, wat commands in matlab...

Hi all, I have used remez function to design a 1D FIR filter and converted it to a 2D FIR filter using ftrans2. However, wat commands in matlab can i use to apply this 2D FIR filter to my image? thks..

Hi there, Is this true, that's impossible to create properly working FIR using VisualDSP 3.0 for 21061 EZ-Kit ? I tried to run simple FIR...

Hi there, Is this true, that's impossible to create properly working FIR using VisualDSP 3.0 for 21061 EZ-Kit ? I tried to run simple FIR (using different codes, samplerates and coefficients), and only what I got is noise :( Is there anybody, who have a working FIR filter project written in C for 21061 EZ-Lite ? Thanks, Jarek

Hello, I am quite new to the field of digital FIR filters (I always worked with the old-fashionned analog ones, but I digress). There is an...

Hello, I am quite new to the field of digital FIR filters (I always worked with the old-fashionned analog ones, but I digress). There is an important aspect to FIR filters that eludes me: A low pass digital FIR filter filters out all frequencies in the stopband (to the set attenuation). This is quite obvious. Now what remains unclear to me is that if the digital filter can only recover ...

Roughly: I have a model in an FIR form that I would like to change to an IIR form (for various reasons that I'll spare you from). I'm interested...

Roughly: I have a model in an FIR form that I would like to change to an IIR form (for various reasons that I'll spare you from). I'm interested in finding the "nearest" IIR filter of order N to some given FIR filter ("nearest" meaning in some reasonable metric). Are there any standard approaches to this or should I just clobber away and see what happens if I try this in some minimization for...

Hi Gentlemen, Please advise if you have thoughts on my questions. I'm developing a program which will be used as audio cross-over,...

Hi Gentlemen, Please advise if you have thoughts on my questions. I'm developing a program which will be used as audio cross-over, meaning that I need to filter the audio signal (HP, LP). I'm using SPUC library and FIR class defined there. FIR coeffs are calculated using Remez algorithm (remez_fir class) and Blackman window applied to them as well. Everything seems to be good - impulse respo...

Hai all, I am searching for a tool other than FDA matlab to give me FIR low pass filter coefficients for canonic structure with any one...

Hai all, I am searching for a tool other than FDA matlab to give me FIR low pass filter coefficients for canonic structure with any one method like window,remez algo etc...I already tried scopeFIR,WinDFplus,FIR tool..pls suggest the dsp tool where i can get the filter coefficients??pls specify links if any.. regards, faz

Hello all, I'm a Brazilian student of Telecomunication Engineering... and I'm working with a research about Active Noise Control ! So, I'm...

Hello all, I'm a Brazilian student of Telecomunication Engineering... and I'm working with a research about Active Noise Control ! So, I'm using a FIR Filter with LMS, both with SIMD. The FIR Filter is OK, I followed the example of Analog Devices (site) but the LMS I wrotte by my own, and I'm not so sure if it's correct !! Somebody have an example of FIR using LMS with SIMD, please (211...

Hello all, I'm working with 21161N EZ-KIT in a active noise control system... I'm looking for a way to measuring the time of my filter (FIR)...

Hello all, I'm working with 21161N EZ-KIT in a active noise control system... I'm looking for a way to measuring the time of my filter (FIR) and my algorithm takes me !!! the clock of my processor is 100Mhz... and a cycles is 10ns... I put a counter that calculated 1340 lines executed... can I calculate 1340 X 10ns ???? and how can I calculate the group delay in my filters (FIR) !?? ...

Hi, I'm trying to model acoustic (20hz-20khz) crossover filters using FIR filters (Fs: 48000 Hz) Now, I have succesfully "approximated" the most...

Hi, I'm trying to model acoustic (20hz-20khz) crossover filters using FIR filters (Fs: 48000 Hz) Now, I have succesfully "approximated" the most filters (tipically LC Butterworh 2nd order filters) using 40-50 taps FIRs. A problem comes up when I try to made an highpass (or bandpass) FIR filter for the midrange. It should pass at 300-500 hz (and stop the frequencies below) But it seems that ...