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Altera_Forum
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13 years ago

NCO and FIR COmpiler Megafunction performance

For learning purpose, I just added two NCO O/Ps with 1 MHz and 5 MHz. NCO1 = 1 MHz NCO2 = 5 MHz and using FIR Compiler unit ( with Fc = 1.25 MHz), I filtered the mixture of these t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Another problem: 

mix <= fsin_o +fsin_o_2;

Is summing both 18 bit signals to 18 bit (causing overflow) and than assigning the result to a 19 bit variable.