出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The steps which form part of the VLBI correlation chain (digitisation, delay correction, channelisation
and integration) can be reordered to reduce the associated losses. This involves processing
as much as possible at the antenna site before passing through the rate limiting step of recording
to disk, or streaming over network connections. We present our plans for such an implementation,
and the gains that this approach will produce. We present the results from our first steps towards
this goal, for which we are experimenting with a Graphics Processing Unit (GPU) to perform the
antenna based corrections. This step involves using the GPUs to provide an autocorrelator to run
in parallel to the VLBI data recorder.
