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?
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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