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Altera_Forum
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14 years ago

Quantization Problem...Help Please

Hi i'm working on a 2 Channel QMF perfect reconstruction Filter bank using a tutorial in Matlab and i'm trying to implement the design on a Cyclone II FPGA board. after setting everything up i notice...
Altera_Forum's avatar
Altera_Forum
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14 years ago

Firstly, 11 bits signed has a range of +1023 -1024 and in your case +/- 1023 (not 1025 at all).

secondly if your output is 33 bits or so then its range is very high. You don't expect +/- 1023 on 33 bits ! all you need could be just truncation of output to match input provided your filter has correct gain