The Matlab command 'grpdelay' is restricted to digital filters only. Does there exist some counterpart to 'grpdelay' that operates in the analog domain? Some Matlab commands have separate versions for the analog and digital domains, and I wonder why 'grpdelay' does not. For example, the 'butter' command to generate Butterworth filter coefficients has digital and analog versions. The analog version is useful for understanding the stand-alone characteristics of a proposed filter, i.e., the characteristics that are independent of a particular sampled data record. ...

Is there a simple expression for the group delay of a CIC filter stage in terms of the differential delay (M) and the rate change R? -- Randy Yates % "Watching all the days go by... Digital Signal Labs % Who are you and who am I?" mailto://yates@ieee.org % 'Mission (A World Record)', http://www.digitalsignallabs.com % *A New World Record*, ELO On Fri, 18 Jun 2010 11:21:37 -0400, Randy Yates <yates@ieee.org> wrote: >Is there a simple expression for the group delay of a CIC filter stage >in terms of the ...

Hi all, Consider a FIR filter with coefficients [1 2 3 2 1] I know the group delay is 2, (5-1)/2. Can anyone tell how to deduce the group delay of 2 without going through the d(theta)/d(omega) mathematics? Is there an easy way to find the group delay? cfy30 cfy30 wrote: > Hi all, > > Consider a FIR filter with coefficients [1 2 3 2 1] > > I know the group delay is 2, (5-1)/2. Can anyone tell how to deduce the > group delay of 2 without going through the d(theta)/d(omega) mathematics? > Is there an easy way to find the group delay? You just found it. What more do yo...

Dear all, My task is to implement a very narrow high pass filter to remove a DC offset of a signal. So the cut off frequency of the filter is very low. The filter must be linear phase. A first implementation was made using a double cascaded moving average filter. The filter seems to do its job very well. Unfortunately the group delay of the filter is too large. I have read some articles on multi rate filtering. Although I the feeling I could use this to find a filter with a shorter group delay most articles point out that multi rate filtering is not used to lessen the group delay. Let...

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) !?? thank's everybody !! henrique On 3 Nov, 14:50, "hbarcellos" <henrique_barcel...@hotmail.com> wrote: > and how can I calculate the group delay in my filters (FIR) !?? You men...

Hi, The fdatool in matlab usually designs a real equiripple filter with a group delay (N-1)/2 or N/2, where N is filter length. Given desired magnitude response, to design a linear phase filter with a prescribed group delay, will the optimum filter be real coefficient and symmetric? Thanks. ZedToe "ZedToe" <acoustictech_zhangtao@yahoo.com.sg> wrote in message news:7c4bf533.0401070850.53b25746@posting.google.com... > Hi, > > The fdatool in matlab usually designs a real equiripple filter with a > group delay (N-1)/2 or N/2, where N is filter length. > > Gi...

Hi, all: is there a specific function for continuous system to analyze group delay? i tried grpdelay function, but it seems to be for digital filter and gives wrong result for a continous system. Thanks. ...

I am trying to calculate group delay of a FIR filter on PC. I use Matlab but I am confused with its algorithm. Basically the Matlab algorithm says this, group_delay(f) = Fourier transform of {n * h[n]} where h[n] is impulse response of the filter. But the Fourier transform of h[n]*n is the differentiation of H(w) with respect to w and not differentiation of phase of H(w) with respect to w, i.e. h[n]*n <------> j * d(H(w))/dw Am I missing something? What would people normally do to calculate group delay of a FIR filter on a PC? Thanks. cykhung@hotmail.com wrote: > I am trying t...

Hi all, I want to design a filter (invertable if possible) that has the minimu amount of group delay and captures the maximum amount of variance given particular data set. I'm thinking something very similiar to the Karhunen&Loeve (KL) transform aka the 'singular spectrum' and also 500 other names... It's just principl coponent analysis of the trjacectory matrix and retaining the first fe significant eigenvectors. I've design a very simple direct-form type II transposed filter which is simple oscillator [x(i)-mean(x(i-t:i-1))], or [1 -ones(t,1)/t] which ha very fa...

Hi all I'm trying to find design methods or literature for low/minimum group delay IIR filters. I'm a bit unsure about what will be the correct term for this kind of filters. But a typically linear-phase FIR has a group delay of 1/2 the filter length. This kind of delay will often be too much since I'm working with motion capture (MoCap) sensors that typically have sampling rates around 100 Hz. I'm guessing that IIR filters can give me more powerful low group-delay filters than FIR. But the typcal filter design tool in MATLAB does not optimize for low group delay. So my que...

I have a report that uses a query as the recordsource. One field in the query is called Header which can be either Approved, Received, Not Taken, Closed Out. On the report footer - I total each of these by txtTotalApproves = Sum(IIF(Header="Approved",1,0)). Then I reference these in the report header as a summary page at the TOP of the report. So this works - but I want the detail lines of a group to only include header types of Closed Out or Not Taken. I know I could create a subreport, but can a group be filtered somehow? I tried entering an expression in the grouping : IIF(Header="Not Taken" or Header="Closed Out",Header), but that still gave me all status. Thanks, Brian In Report Design Mode, modify the "Record Source" property and then click on the elipses "...". In there, modify the query to filter your data as required. Dominic Vella "BerkshireGuy" <berkshireguy2005-commerical@yahoo.com> wrote in message news:a2f6daa6-340a-4720-9c05-dd8b0d075dcf@m34g2000hsb.googlegroups.com... >I have a report that uses a query as the recordsource. > > One field in the query is called Header which can be either Approved, > Received, Not Taken, Closed Out. > > On the report footer - I total each of these by > > txtTotalApproves = Sum(IIF(Header="Approved",1,0)). Then I reference > these in the report header as a summary page at the TOP of the > report. > > So...

Dear all this is my homework, I should determine the delay of this symmetric FIR filter whose length is 3. y[n]=x[n]+x[n-1]+x[n-2]. The answer in the manual solutions is 1. I am confused. In my view, clearly h[0]=1, h(1)=1, h(2)=0, otherwise =zero and it's delay must be two. I guess that the answer is 1 because the filter is symmetric so that h[k]=h[M-k-1] (M=3 is the length of the filter). So delay is only (M-1)/2 if M is odd. Using this thinking, I can find the same answers as in the solution manuals. But indeed I am not satisfied with this explaination and would like to ask you al...

Is there a tool or some option to find out which groups a person is a member of? Also which databases a person or a group has access to? Regards Mailman All you need to do in create a view in your Domino Directory/Address Book named something like "Groups by People" and put this formula as the view selection. @Name([Abbreviate]; Members) Once this is done, and the view is accessed, it will show all the groups that the user is a part of. For the 2nd part of you question, to the best of my knowledge, the best you can do is check the members of a particular g...

import fnmatch, os def find(pattern, startdir=os.curdir): matches = [] os.path.walk(startdir, findvisitor, (matches, pattern)) matches.sort() return matches def findvisitor((matches, pattern), thisdir, nameshere): # for name in nameshere: if fnmatch.fnmatch(name, pattern): fullpath = os.path.join(thisdir, name) matches.append(fullpath) can someone explain why (matches, pattern) is doing in this two funct? thanks In <eo15uq$hna$1@ss408.t-com.hr>, Gigs_ wrote: > import fnmatch, os > > def find(pattern, startdir=os...

I give a ramp (it can be any signal) to a butterworth filter and i want to find the delay between input signal and output signal. I tried xcorr function but it does not work....what is the fastest way to find delay. x = [1:101]; [n,d]=butter(5,0.1); y=filter(n,d,x); In the above example I want to find delay between x and y. Thanks Kirk Hazel wrote: > > > I give a ramp (it can be any signal) to a butterworth filter and i > want to find the delay between input signal and output signal. I > tried xcorr function but it does not work....what is the fastest > way > to find del...

Anyone care to share their filters for this group? I currently filter for: "no.email@no.email.invalid" "Microsoft-Outlook-Express-Macintosh-Edition/5.02.2022" -- Spartanicus none. Kiri "Spartanicus" <me@privacy.net> schreef in bericht news:q2ou20l3rdvhvelqqrciaua0bkphgb4plf@news.spartanicus.utvinternet.ie... > Anyone care to share their filters for this group? > > I currently filter for: > > "no.email@no.email.invalid" > "Microsoft-Outlook-Express-Macintosh-Edition/5.02.2022" > > -- > Spartanicus ...

What's comp.lang.functional about exactly? Is there a FAQ? Thanks! ...

I designed an algorithm to compute signal delay through an RF channel. I first verified the algorithm using a known IIR model. I managed to get groupdelay of this IIR spot on compared to that given by Matlab function grpdelay(num,den). The algorithm is based on sending frequency sweep chirp signal followed by fft then conversion of phase to groupdelay using the derivative of negative angular phase with respect to angular frequency. The algorithm has been released and is working well. I am now asked if I could apply it to the case when the available test signal is only single tone instead of frequency sweep. I tested my same algorithm on single tone. All looks ok but with a mystery factor of 2 needed to get IIR model groupdelay match that of matlab. I mean if I multiply the computed groupdelay based on fft by 2 then it gets correct with a small margin of error. Any idea what this factor of 2 might be. In both cases I use real only chirp signal or real only single tone and the fft is complex. Processing is identical throughout the algorithm for both cases in every step. Regards Kadhiem kaz <37480@dsprelated> wrote: > I designed an algorithm to compute signal delay through an RF channel. > I first verified the algorithm using a known IIR model. I managed to get > groupdelay of this IIR spot on compared to that given by Matlab function > grpdelay(num,den). The algorithm is based on sending frequency...

Hi! I'm looking for a piece of free software to run on a LAMP set-up. The intent is to allow anyone to add some information into a database (a URL and short description - nothing very fancy at all!) and be able to query it later, all via a web page. Most importantly, it needs to be set up with a minimum of effort and without programming. There is neither time nor skill available for programming, though modifying a set-up file given some usable documentation is OK. I don't anticipate a large number of users, but the backend database might get pretty big. Since it's MySQL, I'm not too concerned about size, but performance may be an issue later. I've looked through google and haven't seen anything, but I'm betting that's because I can't find the right keywords. Can anyone tell me: 1) if you know of such a system already in existence (and where it is); or 2) what keywords you would use to find such a beast? I apologize for this being off topic, but I'm stumped. Thanks! -- Jonathan Allan Neither Mayo Clinic nor I speak for each other unless we explicitly say so. You should assume I am speaking only for myself. Please remove the antispam ".6809" to reply direct to me. Thanks! ...

Anyone care to share their filters for this group? I currently filter for: "no.email@no.email.invalid" "Microsoft-Outlook-Express-Macintosh-Edition/5.02.2022" -- Spartanicus none. Kiri "Spartanicus" <me@privacy.net> schreef in bericht news:q2ou20l3rdvhvelqqrciaua0bkphgb4plf@news.spartanicus.utvinternet.ie... > Anyone care to share their filters for this group? > > I currently filter for: > > "no.email@no.email.invalid" > "Microsoft-Outlook-Express-Macintosh-Edition/5.02.2022" > > -- > Spartanicus ...

This newsgroup has become quite irritating to read as of late, and there's about half a dozen people i'd like NOT to see show up in here.. While i check out this place mostly at work for solidworks related questions, we dont have any newsgroup software installed on these machines that would easily allow me to setup filters. Is there a way to filter out users through the google groups? I'm not holding my breath, but if its possible it may just keep me logging on every day. Just seems any solidworks conversation is steered into a pointless flame war that serves absolutly nothing beca...

Anyone noticed that google groups is not updating SAS-L ? Today the newest item is dated 2 days ago. R That's true, very unexpected delays both for new posts and also for replies. Hope will be fixed soon. On Oct 29, 12:33=A0am, Akshaya <akshaya.nathil...@gmail.com> wrote: > That's true, very unexpected delays both for new posts and also for > replies. Hope will be fixed soon. Seems to be back to normal now. R ...

I'd like to *always* eliminate Google search hits containing particular key words or URL parts. It his possible? -- "In no part of the constitution is more wisdom to be found, than in the clause which confides the question of war or peace to the legislature, and not to the executive department." - James Madison In article <7udbq4h79gfi23jh2ogqt2bethc0ljv5ta@4ax.com>, Howard Brazee <howard@brazee.net> wrote: >I'd like to *always* eliminate Google search hits containing >particular key words or URL parts. It his possible? If you sea...

I would like to know if I can predict what the group delay of a CIC filter is. I have an agressive FIR BPF where the sample rate is 2000 x the filter bandwidth. The group delay is longer than I would like it to be. Could a CIC filter offer a lower group delay? I'll need to interpolate back to the original sample rate, so I need to take that into consideration as part of the answer. Thanks, in advance. Jim jim_nospam_beasley@yahoo.com wrote: > I would like to know if I can predict what the group delay of a CIC > filter is. What is a CIC filter? Bob -- "Things should be described as simply as possible, but no simpler." A. Einstein "Bob Cain" <arcane@arcanemethods.com> wrote in message news:dii59h19o4@enews4.newsguy.com... > > jim_nospam_beasley@yahoo.com wrote: >> I would like to know if I can predict what the group delay of a CIC >> filter is. http://www.google.com/search?hl=en&q=%22cic+filter%22+%22group+delay%22 > > What is a CIC filter? > http://www.google.com/search?hl=en&q=cic+filter > > Bob > -- > > "Things should be described as simply as possible, but no simpler." > > A. Einstein Simple enough, Bob? ;-) Cheers, Syms. <jim_nospam_beasley@yahoo.com> wrote in message news:1129092761.120373.45800@z14g2000cwz.googlegroups.com... >I would like to know if...

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