Performance of the Cordic Algorithm in I-Q Modulators

C. Benavente-Peces, J.M. Pardo-Martín, and F.J. Ortega-Gozález (Spain)


I-Q modulator/demodulator, CORDIC algorithm, phase rotator


This paper analyses the use of the CORDIC algorithm in I-Q modulators. The analyse highlights the computational advantages of using this algorithm and the drawbacks, focusing on the fixed point arithmetic problem. Two approaches are presented and their performance is discussed based on the frequency error met by each one. Along the discussion, comparison with other computationally efficient algorithms is presented.

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