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 Points taken John, but if I do all the coding then I will not find any errors I think. I'll know soon whether my design is correct - it's really a question of using correct Nyquist adjusted frequencies etc. Simon Brown, HB9DRV ----- Original Message ----- From: John B. Stephensen 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 it be more useful to feed the filter design parameters into another implementation of the Remez exchange algorithm and compare the results? 73, John KD6OZH ----- Original 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 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 of the coefficients to get the frequency response.