Re: [digitalradio] FIR Filters

2008-01-21 Thread Simon Brown
Hi Sergio, I am able to design using Parks-McClellan and to be honest I think my UI is better than ScopeFIR's. What I would like (but not essential) is the ability to take my filter coefficients and validate them with another program. I don't see this in ScopeFIR, although I could possible

Re: [digitalradio] FIR Filters

2008-01-21 Thread John B. Stephensen
21, 2008 08:46 UTC Subject: Re: [digitalradio] FIR Filters Hi Sergio, I am able to design using Parks-McClellan and to be honest I think my UI is better than ScopeFIR's. What I would like (but not essential) is the ability to take my filter coefficients and validate them

Re: [digitalradio] FIR Filters

2008-01-21 Thread Simon Brown
Hi, This is not a problem, but I would like to feed my data into a 3-rd party program to prove my design, that's all :-) Simon Brown, HB9DRV - Original Message - From: John B. Stephensen  Since the filter coefficients are the impulse response, you should be able to do a DFT

Re: [digitalradio] FIR Filters

2008-01-21 Thread Leigh L Klotz, Jr.
Simon, You can use znudigi to do this. See http://wa5znu.org/2008/znudigi-rpsk You will need to recompile it, but it is in Java and the source is provided. The FIRFilter is there, and the designer is separated out. Leigh/WA5ZNU On Mon, 21 Jan 2008 12:46 am, Simon Brown wrote: Hi Sergio, I

Re: [digitalradio] FIR Filters

2008-01-21 Thread John B. Stephensen
Message - From: Simon Brown To: digitalradio@yahoogroups.com ; [EMAIL PROTECTED] Cc: digitalradio@yahoogroups.com Sent: Monday, January 21, 2008 17:58 UTC Subject: Re: [digitalradio] FIR Filters  Hi, This is not a problem, but I would like to feed my data into a 3-rd

Re: [digitalradio] FIR Filters

2008-01-21 Thread Simon Brown
To: digitalradio@yahoogroups.com ; [EMAIL PROTECTED] Cc: digitalradio@yahoogroups.com Sent: Monday, January 21, 2008 7:12 PM Subject: Re: [digitalradio] FIR Filters  A third party DFT implementation should prove that the coefficients aren't completely incorrect. Beyond that, wouldn't

Re: [digitalradio] FIR Filters

2008-01-21 Thread John B. Stephensen
OK. I have the MDS product (QEDesign 1000) and could compare the coefficients generated if that helps. 73, John KD6OZH - Original Message - From: Simon Brown To: digitalradio@yahoogroups.com Sent: Monday, January 21, 2008 18:21 UTC Subject: Re: [digitalradio] FIR Filters

Re: [digitalradio] FIR Filters

2008-01-21 Thread Leigh L Klotz, Jr.
I think maybe what you want is MATLAB. It has its own Parks-McClellan designer, firpm. It also has an estimator for required order, given band edges and desired amplitudes. You can then trivially plot the h(n), error, etc from within Matlab. I don't know if the free clones of Matlab

[digitalradio] FIR Filters

2008-01-20 Thread Simon Brown
I have written my own code to design FIR filters using Parks-McClellan. Are there any programs I can use to test the filter by supplying my table of coefficients? This is part of some SSTV code, I wrote the software as I couldn't find what I needed out there on the web. Simon Brown, HB9DRV

Re: [digitalradio] FIR Filters

2008-01-20 Thread Simon Brown
An example of the filter design (ignore the numbers in the toolbar please): http://gallery.ham-radio.ch/main.php?g2_itemId=14198g2_imageViewsIndex=2 Simon Brown, HB9DRV - Original Message - From: Simon Brown I have written my own code to design FIR filters using

Re: [digitalradio] FIR Filters

2008-01-20 Thread [EMAIL PROTECTED]
Simon, Check this out: http://www.dspguru.com/sw/tools/filtdsn.htm I have tried ScopeFIR so far. Regards, Sergio, EA3DU Mensaje original De: [EMAIL PROTECTED] Recibido: 20/01/2008 23:15 Para: Asunto: [digitalradio] FIR Filters I have written my own code to design FIR filters using