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Altera_Forum
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13 years ago

Costas Loop - DSP Builder and ModelPrim blocks - Feedback problem

Hello Everyone, This is my first DSP Builder project and my first FPGA project. I have designed to the best of my knowledge a working costas loop in Simulink with ModelPrim blocks. The simulati...
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Altera_Forum
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13 years ago

Note that you can insert a sampleDelay in the feedback path, and click "minimum delay" Then you get the smallest delay that will close the loop.

You can also reduce this number of delay by reducing your clockrate. 64 seems large for a kostas loop. Are you doing this floating point?

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I tried with various delays wihtout success..... until I tried a much longer delay (64). It now works.

Thanks for the reply,

Carl

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