Hi I implemented a similar library of vector processing primitives (the Bus subsection in the library) a few years ago when we upgraded the PFB. Unfortunately, Simulink has upper limits on the width of buses, and drawing area. We have not been able to implement large-number-of-tap pfb_firs because of the bus restriction (if I recall correctly, the limit is 4096 bits). As we move to higher bandwidths we will have to hack around this restriction more unless Mathworks changes things. I would guess using the Xilinx primitives will give the same issues.
Regards Andrew On Thu, Jun 27, 2019 at 5:22 PM Forbes, David C - (dforbes) < [email protected]> wrote: > Jason, > > Yes, it's quite a big thing, and it's not publicized at all. I had to dig > through the DSP user guides to find it. > > They have parallel FIR filters and parallel FFTs and all the good things > that people used to have to write from scratch. > > I'd like to see CASPER adopt the new Xilinx tools as a way to build DSP > gateware in the future, as the cellphone base station providers have > finally caught up to radio astronomy in bandwidth. Having the telecom > industry pushing the tools forward will get a lot accomplished, with much > less effort expended by our gang. > > > David Forbes > Arizona Radio Observatory > Tucson, AZ > W: 520-626-1361 C: 520-989-1491 > > -----Original Message----- > From: Jason Manley <[email protected]> > Sent: Thursday, June 27, 2019 8:08 AM > To: Casper Lists <[email protected]> > Subject: Re: [casper] FIR and decimating CIC filter > > That's an interesting development that I wasn't aware of! As it turns out, > we're using Vivado 2018.2, but this might be a strong motivator to switch > to the newer tools. > > Thanks for the heads-up. I'll definitely look into it. > > Jason > > > > On 27 Jun 2019, at 17:05, Forbes, David C - (dforbes) < > [email protected]> wrote: > > > > Jason, > > > > Xilinx has started to offer an SSR (Super Sample Rate) DSP library with > Vivado 2018.3, which CASPER would do well to migrate towards. But if you're > stuck in the old toolchain, then I can't help you. > > > > > > David Forbes > > Arizona Radio Observatory > > Tucson, AZ > > W: 520-626-1361 C: 520-989-1491 > > > > -----Original Message----- > > From: Jason Manley <[email protected]> > > Sent: Thursday, June 27, 2019 7:51 AM > > To: Casper Lists <[email protected]> > > Subject: [casper] FIR and decimating CIC filter > > > > Hi CASPERites > > > > Has anyone implemented a decimating CIC filter on a CASPER platform? How > 'bout a conventional IIR or FIR filter? We're after ones that accept > parallel input samples; the Xilinx one doesn't seem to do wideband signals. > > > > We're looking at options for a new digital downconverter. Please let me > know if you've got something you could share with us to use. If not, we'll > have to start modding the PFB_FIR and existing DDC library blocks for our > needs. > > > > Jason Manley > > DSP Manager > > SKA-SA > > > > Cell: +27 82 662 7726 > > Work: +27 21 506 7300 > > > > -- > > You received this message because you are subscribed to the Google > Groups "[email protected]" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected]. > > To view this discussion on the web visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/C3DB0FD8-7B14-4232-B266-E7E17930AD89%40ska.ac.za > . > > > > -- > > You received this message because you are subscribed to the Google > Groups "[email protected]" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected]. > > To view this discussion on the web visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/SN6PR19MB2285A0EEE0EB7A6E8DC8359CE9FD0%40SN6PR19MB2285.namprd19.prod.outlook.com > . > > -- > You received this message because you are subscribed to the Google Groups " > [email protected]" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/0A6BB15B-7ED3-4ABE-8C05-76D9A582F4E4%40ska.ac.za > . > > -- > You received this message because you are subscribed to the Google Groups " > [email protected]" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/SN6PR19MB22859911CF8EB21740B2D22AE9FD0%40SN6PR19MB2285.namprd19.prod.outlook.com > . > -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CADEwHTdaM0k4HO_A6HJpgcT8bSbs5BgME6kyq9FGBZY3RrMRZA%40mail.gmail.com.
