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Ono's avatar
Ono
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4 years ago

Fractional mode of altera_fir_compiler_ii

altera_fir_compiler_ii version 18.0 What is the configuration in Fractional mode? Is "Up sampling→LPF→Down sampling"? In the Frequency Response (Magnitude) graph of the cofficients tag, It is di...
SengKok_L_Intel's avatar
SengKok_L_Intel
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4 years ago

Hi,


When you choose fractional rate, it allows you to configure both interpolation factor and decimation factor for either up or down sampling conversion.


Regards -SK


Ono's avatar
Ono
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4 years ago

For example, Interpolation 3
If the decimation is 2,

LPF processing is performed before decimation (Up sampling → LPF → Down sampling) and after (Up sampling → Down sampling → LPF).

Which will you be?