Alternatives for Low-Complexity Complex Rotators
2010 (English)In: Proceedings of the 17th IEEE International Conference on Electronics, Circuits, and Systems, (ICECS 2010), Athens, Dec-12-15, 2010, IEEE , 2010, 17-20 p.Conference paper (Refereed)
Complex rotations find use in common transforms such as the Discrete Cosine Transform (DCT) and the Discrete Fourier Transform (DFT). In this work we consider low-complexity realization of constant angle rotators based on shifts, adders, and subtracters. The results show that redundant CORDIC and scaled constant multiplication are providing the best results, depending on which angle is considered. It is also shown that the precision can vary several bits using the same number of adders and subtracters, and, hence, the correct choice of rotator architecture is crucial for a low-complexity realization.
Place, publisher, year, edition, pages
IEEE , 2010. 17-20 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-65909DOI: 10.1109/ICECS.2010.5724443OAI: oai:DiVA.org:liu-65909DiVA: diva2:400287
The 17th IEEE International Conference on Electronics, Circuits, and Systems, (ICECS 2010), Athens, Dec-12-15, 2010
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Fahad Qureshi, Mario Garrido and Oscar Gustafsson, Alternatives for Low-Complexity Complex Rotators, 2010, The 17th IEEE International Conference on Electronics, Circuits, and Systems, (ICECS 2010), Athens, Dec-12-15, 2010.