AnsweredAssumed Answered

Does SigmaDSP support  both cosine and sine source?

Question asked by shen on Dec 10, 2010
Latest reply on Mar 30, 2011 by BrettG

Hi,

 

I'd like to create a "frequency shifter function"  based on SigmaDSP platform.

And the algorithm diagram is shown below.

Here the Hilbert filter is a 256 FIR filter and cosine and sine signal source is about 2~10 Hz.

The system sample frequency is 48kHz.

 

 

freq shift.JPG

  So I need both sine and cosine signal source while there is only tone source in Sigmastudio lib.

  Although I can delay half a period of sine wave to generate cosine wave, which need too many RAM consuming.

  

  So I'd like to know how can I get both cosine and sine signal source efficiently.

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