How to use log functions on HDL Coder?

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Shruthi Sampathkumar
回答： Tim McBrayer 2016-5-18
Hello all, Can anyone help me as to what alternative code can I use instead of log10 to calculate Gain of a signal in decibels? Here's my code sample...
var_s_cfb=sum(ip.^2)/(length(ip)) - (length(ip))*mean(ip)^2/(length(ip));
var_en_3_cfb=sum(en_3.^2)/(length(en_3)) - (length(en_3))*mean(en_3)^2/(length(en_3));
GPcfblms=(var_s_cfb)/(var_en_3_cfb);
GPcfblms_dB=20*log10(GPcfblms);
Error: ??? Function 'log10' is not defined for values of class 'embedded.fi'.
Thank you,
Shruthi Sampathkumar.

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回答（1 个）

Tim McBrayer
Tim McBrayer 2016-5-18
HDL Coder supports auto-generating function replacement code that uses a lookup table specifically tuned to your use case. There is a HDL Coder featured example that demonstrates this capability. More information can be found in the HDL Coder documentation.

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