Honored ContributorHi,
I want to realize a filter bank with 32 x IIR band-pass filter with reduced Multiplier. I have a Altera DE2 board Ciclone 2, FPGA EP2C35F672C6N, possess only 70 9x9 Multiplier. Can someone give me a good type there or a Example for a IIR filter with LUT or with multiplie accumulate? Thanks.
Honored Contributorcan you provide some extra information? do the filters have the same coefficients? what is the sample rate and available clock rate? how many bits are the data and coefficients?
you should be able to take HDL for an IIR and use LE based multipliers instead of DSP blocks by using synthesis attributes or instantiating MegaFunction multipliers.Honored Contributorthe filterbank have 32 IIR-bandpassfilter with 32x16 coefficient.
the application is a mp3-encoder/decoder in dsp-builder. I have resolt my schematic with LUT. The audio-signal is sampled with 48kHz and the load of coeff in multiplier from LUT with 48kHz x 32 = 1.536MHz. I use Base clock (48kHz) and a derivate clock with 1/32 dimension --> 48kHz / (1/32) = 1.536MHz. But I d'ont can simulate, I have the following errormessage: ********* Error reported by S-function 'sGeneric' in audio_path.mdl Two ports have different clocks clock_1.536MHz and clock_48kHz, where they should have the same ********* my e-mail is maranello(at)hispeed.ch, so I can send you my mdl-file...Honored Contributorthe two ports in the errormessage does mean the entry for the multiplier and adder...
Honored ContributorI try to make two clocks with PLL, but without success...
Honored ContributorI post now my mdl-file...
Honored Contributormy mdl-file:
Honored Contributorhere the coeff for the LUT (load in matlab workspace).
Honored ContributorI make a Simulation in matlab with the same clock of 48kHz, the simulation was correct. But with the signal compiler dsp-builder I became a error
--> out of memory quartus-map.exe 1881 MByte wath is the problem?Honored Contributorlooks like the underlying Quartus application ran out of physical RAM in your machine.
Honored Contributormy workstation is a x64 OS Win 7 Prof with 8 GB RAM, thats not normaly that a program go out of memory.
Could you explain me how I can make settings in quartus or in dsp-builder for better work with the RAM? Is the solution maybe Quartus 9.2 with DSP-Builder 9.2? Thanks for your answer...
