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Testing a filter with NCO is of limited efficiency. A simple test is to inject impulse input i.e. first sample set high, others zero for some time and repeat this pattern. then you should get impulse response at output i.e. your coeffs scaled.
The best way however is to pass random data to both your design and matlab "filter" function and check for bit true performance.
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Thanks Kaz...i'm getting a lot of great ideas from all poster, but i'm relatively new to Quartus II and testing through hardware. i need a more comprehensive approach to doing these idea. a guide or a link to a manual will be very helpful. for example how do i pass random data to the filter on FPGA. i do know how to use the "filter" function on matlab though, the thing is i need to test it on the FPGA.
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