PhD students' day — CITI lab


Filters computing just right

by Matei Istoan

Picture of Matei Istoan

Details

Socrate team
2nd year

Keywords

FIR filter
FPGA
computing just right

Advisor

Florent de Dinechin

Partner

INRIA


Many digital filters and signal-processing transforms can be expressed as a sum of products with constants (SPC).

This poster presents the automatic construction of low-precision, but high accuracy FIR filter architectures: these architectures are specified as last-bit accurate with respect to a mathematical definition. In other words, they behave as if the computation was performed with infinite accuracy, then rounded only once to the low-precision output format. This eases the task of porting double-precision code (e.g. Matlab) to low-precision hardware or FPGA. The construction of the most efficient architectures obeying such a specification, introducing several architectural improvements to this purpose is also presented.

This approach is demonstrated in a generic, open-source architecture generator tool built upon the FloPoCo framework.


Acknowledgements


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