Hi In the attached picture you can see the fft xilinx blocks I found.
Which one should I use? How should I set this block? 2016-01-20 3:06 GMT-06:00 Ryan Monroe <[email protected]>: > I don't use the stock CASPER FFTs anymore, but I'm pretty sure that > there's no way to use them for anything less than {2 complex inputs --OR-- > 4 real inputs}. If you want less, you can drive an input with a constant > '0', but resource-wise, they're the same. This is because of algorithmic > limitations; there is a resource efficiency you gain by doing two complex > FFTs at once. > > This is a time for a streaming Xilinx FFT. > > --Ryan > > > On 01/19/2016 09:49 PM, James Smith wrote: > > Hi Rolando, > > I can't recall that it does, off the top of my head, but the Casper one > can be set up to use just one input. This is what I've done in the past, I > think. > > Regards, > James > > > On Wed, Jan 20, 2016 at 7:39 AM, Rolando Paz <[email protected]> wrote: > >> Hi James and Andrew >> >> Thank for yours advices. >> >> I'm trying to recompile the design of Peter McMahon: >> https://casper.berkeley.edu/wiki/Parspec >> >> I'm using these libraries: >> >> https://github.com/casper-astro/mlib_devel/tree/mlib_devel-2010-09-20 >> >> and I use a virtual machine "windows XP SP3", on ubuntu 14.04LTS, Matlab >> R2007b, >> ISE, EDK, SG 10.1, with respective updates, IBOB+QUADC. >> >> With this configuration, I can not compile this new design. >> >> I'll try with Xilinx FFT... >> Is there a Xilinx block version for the PFB too? >> >> Thank you. >> >> >> >> 2016-01-19 23:23 GMT-06:00 Andrew Martens < <[email protected]> >> [email protected]>: >> >>> Hi Rolando >>> >>> You may want to look at the Xilinx FFT for your use case. The CASPER FFT >>> is optimised so that minimal resources are used when processing high >>> bandwidths (either many inputs, or inputs captured at high sample rates). >>> In this case you may find that the Xilinx FFT actually uses fewer >>> resources. >>> >>> Regards >>> Andrew >>> >>> On Tue, Jan 19, 2016 at 11:11 PM, Rolando Paz <[email protected]> wrote: >>> >>>> Hi >>>> >>>> Is there any other FFT block that I can use with ADC4x250-8? >>>> >>>> https://casper.berkeley.edu/wiki/ADC4x250-8 >>>> >>>> I am using the "fft_biplex_real_2x" block, however I need only one >>>> input of the four that this block has. I placed at zero the others three >>>> inputs. >>>> >>>> I need more FPGA resources from IBOB, and I think using another FFT >>>> block may be one solution. >>>> >>>> Best Regards >>>> >>>> RP >>>> >>> >>> >> > >
