IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
Low-resource low-latency hybrid adaptive CORDIC with floating-point precision
Hong-Thu NguyenXuan-Thuan NguyenTrong-Thuc HoangDuc-Hung LeCong-Kha Pham
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JOURNAL FREE ACCESS

2015 Volume 12 Issue 9 Pages 20150258

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Abstract

Despite being proposed since more than 50 years ago, COordinate Rotation DIgital Computer (CORDIC) is still one of the most effective algorithms for elementary function calculation so far. Original CORDIC, however, suffers high latency due to its nature of unvarying number of rotations. As a result, a low-latency hybrid adaptive (HA) CORDIC is proposed in this paper. Firstly, adaptive angle selection decreases total iterations up to 50% with respect to higher accuracy of results. Secondly, hybrid architecture including fixed-point input and floating-point output reduces the total hardware utilization and enhances the dynamic range of final results. Lastly, parallel and pipeline processing together with resource sharing technique allow the design to operate fully at 175.7 MHz with low resource consumption — 1,139 LUTs and 489 registers.

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© 2015 by The Institute of Electronics, Information and Communication Engineers
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