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Altera_Forum's avatar
Altera_Forum
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16 years ago

Weird harmonic in FFT

A sin22k is generated using the NCO with 23 bit output. Then the set of data, fsin_o based on the criteria: posedge clock , out_valid is 1, enable is 1, and out_valid is 1 are feed to fft. Weird harmonic resulted.

May i the reason and how to solve this?

Pls explain in a simple way because i am new to this.

Thanks a lot

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    sorry. I have found out the problem. There is something wrong with my raw data.

    Thanks