Arjun Radhakrishnan
"If you think you can,
or if you think you cannot, either way, you are right." - Henry Ford
About
Me
I was born on the 4th of
September in 1985 in a small (at the time) city in India called Bangalore. Having
finished most of my primary and secondary education in India I decided to do
my undergraduate studies at the University of Cape Town in South Africa,
studying Electrical and Computer Engineering. On completing that I continued
on at UCT pursuing an MSc in Electrical Engineering under the supervision of
Prof. Michael Inggs. I am currently in the second year of that course and aim
to finish this year. |
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Past
Work
My undergraduate thesis was
entitled "Signal Processing on a Graphics Card - An Analysis of Accuracy
and Performance", and is available here. It investigated the possible
increases in performance offered when using Graphics Cards to run common signal
processing primitives such as the Fast Fourier Transform and Finite Impulse
Response Filters. I have since continued working with GPUs, looking to
accelerate various other signal processing tasks. |
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MSc
Research
For my masters
dissertation, I am going to be implementing two signal processing algorithms
on a GPU for the Square Kilometre Array Project. The first application is a
part of the imaging process and is called gridding. Gridding is the process
used to assign the visibility values obtained from the telescope onto a
regular, rectangular matrix or ‘grid’. This is done by using an interpolation
algorithm to assign values at the grid points corresponding to each observed
data point. The reason we need to place the data on a regular grid is so that
we can then use the fast Fourier transform (FFT) to evaluate the output
image. I will be implementing this on a GPU and benchmarking it with various
grid sizes against a CPU implementation. The second application is
for pulsar dedispersion. Pulsars are rapidly rotating neutron stars and they
emit regular pulses of electromagnetic radiation. As this radiation moves
through space, it gets affected by the Interstellar Matter (ISM) that causes
the lower frequency components of the wave to be delayed more than the higher
ones. Thus when the signal arrives on Earth the pulse appears to be spread
out over a longer period of time than it actually is. I aim to correct for
this error in real time using a method called coherent dedispersion and will
benchmark its performance against that of the dedispersion program SIGPROC on
the CPU. Finally
I will be making recommendations on the potential to use GPUs for these and
other similar problems for the SKA project. |
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Contact Details
Tel : (+27)730750738 Email
: arjun53[at]gmail[dot]com |
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