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Altera_Forum's avatar
Altera_Forum
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14 years ago

How to expand the output of cordic algorithm

Hi, I'm going to ues cordic alglrithm in verilog to calulate the sin and arcsin in the IQ modulation and demodulation . The input phase range is [ 0 , 2*pi ] of cordic in the TX ...
Altera_Forum's avatar
Altera_Forum
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14 years ago

Output range of arcsin isn't a CORDIC problem, I think. It's about the principal value interval of the function. See http://en.wikipedia.org/wiki/arcsin

You can extend the range periodically, but I guess this doesn't solve your problem. You need to choose a demodulation algorithm with unambiguous phase result.