Speaker
Mr
John Molendijk
(CERN)
Description
Modern Low-Level RF systems rely heavily on digital signal treatment. This
evolution
has been mainly enabled by the recent availability of powerful FPGAs. Current FPGAs
can implement almost all of the signal-treatment requirements e.g. post-mortem and
observation memory management, base-band network analyzer functionality, the remote
interface to the control systems front-end computer and implement an optional DSP
interface bus. The FPGA hardware design language descriptions required for these
tasks can easily be entered or imported in the Visual-Elite mixed graphical textual
design environment used for the LHC Low Level RF. Standard features are the support
of standard VHDL text modules as well as block-diagrams, graphical state-machines,
truth-tables and flow-chart hardware descriptions, however the main interest lies
in
the inherent code reusability between different projects and it's independence of
target device architecture.
This presentation will give a short overview of the design flow, the tools employed
and some examples of implementations like: Serial programmable delay controller, IQ
demodulator, base-band network analyzer, CIC and half-band decimation /
interpolation filters, cross product and power product calculators and a CORDIC
based calculator.
Author
Mr
John Molendijk
(CERN)
