Correction: by "exactly that", I mean building a radio astronomy
targeted board around the RFSoC chip, but not necessarily CASPER-ised....
On 3/19/2018 1:48 PM, Karl Warnick wrote:
I have heard, if I remember correctly, that CSIRO is doing exactly
this. If anyone has details, perhaps they could let the group know. If
not, I can probably trace the source and find out.
They are expensive chips, but maybe lower rate, lower cost versions
will be forthcoming.
Karl
On 3/16/2018 1:10 AM, Francois Kapp wrote:
The timing and availability might be a factor, but it would be great
if "someone" had the energy to "CASPER-ise" a Xilinx RFSoC
development board. They have up to 16 ADC's that may be overkill in
the sample rate department, but it is an interesting platform. Maybe
development boards are available?
On 16 Mar 2018 07:05, "Jack Hickish" <jackhick...@gmail.com
<mailto:jackhick...@gmail.com>> wrote:
Hi Karl,
On Thu, 15 Mar 2018 at 21:59 Karl Warnick <warn...@ee.byu.edu
<mailto:warn...@ee.byu.edu>> wrote:
Hi all,
I have a non-astronomical comms antenna array project that
does not have
detailed specs for bandwidth and number of antenna elements.
I need to
build a programmable platform that I can use for multichannel
sampling
and real time DSP.
Our group has considerable experience with ROACH based
systems over the
years and hybrid FPGA - GPU architectures, but the students
with much of
the expertise have graduated and moved on, as students tend
to do. We
have an x64 board and ROACH that on paper could do the job,
but the
hardware seems old enough now that I wonder if it might be
wise to move
to a new platform for my new project. We also like the easier
programmability of GPUs for matrix based array signal processing
algorithms. We also have a system with digitizers, polyphase
filterbanks
running on ROACH boards, ethernet switch, and HPCs with GPUs,
but that
system is in operation at GBO and is probably overkill for
the current
project.
This leads to my question. To realize a system with 16 analog
channels
and analog bandwidth ranging between a few MHz up to 100 MHz
(I realize
that this is a rather ill defined range, but I feel fortunate
to have
the flexibility), that can do digitization, filterbank to
separate into
frequency channels, and enough processor power for real time XB
(correlator/beamformer) type signal processing, with current
CASPER
hardware, what would be the ideal, recommended hardware setup?
I think your options here are either a/some SNAP board(s) -- 12
ADC channels at up to 250 MSample/s sampling rate, or a ROACH2 +
adc16 card -- 16 channels at up to 250MSample/s. Either would
give you Ethernet output on SFP+ connectors. SNAP can do up to
20Gb/s output, ROACH2 up to 80Gb/s.
In either case, there should be some simulink designs you could
use as a starting point, from PAPER/HERA or other projects.
Cheers
Jack
The relatively modest bandwidth requirement may also point to a
commercial FPGA/ARM core board with an ADC expansion board,
and I'm
pursuing that path as well. From another project, I have an
expansion
board of our own design with eight ADC channels that plugs into a
microZED board, which actually comes somewhat close to
meeting the
current requirements. Expanding the ADC board and moving to a
bigger
commercial digital board is an option.
Thanks to all for any feedback!
Best,
Karl
--
Karl F. Warnick
Department of Electrical and Computer Engineering
Brigham Young University
459 Clyde Building
Provo, UT 84602
(801) 422-1732
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459 Clyde Building
Provo, UT 84602
(801) 422-1732
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Department of Electrical and Computer Engineering
Brigham Young University
459 Clyde Building
Provo, UT 84602
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