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Altera_Forum
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13 years ago

FIR filter design with IEEE 754 half-precision floating point

Hi All We are in the initial phase of a project which implements processing of biomedical signals. I am trying to implement FIR filter with IEEE 754 half-precision (16-bit) floating point ari...
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Altera_Forum
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13 years ago

You want to look at fractional integer formats. Go through these slides:

http://www.ovro.caltech.edu/~dwh/correlator/pdf/esc-111paper_hawkins.pdf

http://www.ovro.caltech.edu/~dwh/correlator/pdf/esc-111slides_hawkins.pdf

and source

http://www.ovro.caltech.edu/~dwh/correlator/pdf/esc2011_fpga_dsp_code.zip

You'll want to look at using convergent rounding, there's code in that zip.

If you're testing FIR filters, then you can use an LFSR as a digital noise source:

http://www.ovro.caltech.edu/~dwh/correlator/pdf/lfsr_tutorial.pdf

http://www.ovro.caltech.edu/~dwh/correlator/pdf/lfsr_tutorial_src.zip

Cheers,

Dave