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



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.