A CORDIC with Unified Rotation Strategy

Siyang Wang, Jia Yu, Kui Ting Chen, Takaaki Baba

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

CORDIC (Coordinate Rotation DIgital Computer) is an iterative algorithm which is used to calculate mathematical functions such as trigonometric, hyperbolic, exponential functions and so on. The iterative procedure of conventional CORDIC is time-consuming due to its inadequate rotation strategy. Recently, some improved rotation strategies are proposed to reduce disproportionate rotations, which can significantly reduce about 30% to 60% of the iterative procedure for CORDIC algorithm. However, the improved rotation strategies can only be used for a few functions, since they only design to be compatible with circular coordinate system and rotation mode of CORDIC algorithm. In order to overcome such difficulty, this paper presents a unified rotation strategy to enable the functions of the improved rotation strategies for different coordinate systems and operating modes of the CORDIC algorithm. The proposed rotation strategy contains two components which are unified coarse rotation and unified precise rotation, which can drastically reduce disproportionate rotations meanwhile it can maintain higher calculation precision than conventional approaches.

Original languageEnglish
Title of host publicationProceedings - 2016 IEEE International Conference on Internet of Things; IEEE Green Computing and Communications; IEEE Cyber, Physical, and Social Computing; IEEE Smart Data, iThings-GreenCom-CPSCom-Smart Data 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages744-749
Number of pages6
ISBN (Electronic)9781509058808
DOIs
Publication statusPublished - 2017 May 1
Event9th IEEE International Conference on Internet of Things, 12th IEEE International Conference on Green Computing and Communications, 9th IEEE International Conference on Cyber, Physical, and Social Computing and 2016 IEEE International Conference on Smart Data, iThings-GreenCom-CPSCom-Smart Data 2016 - Chengdu, China
Duration: 2016 Dec 162016 Dec 19

Other

Other9th IEEE International Conference on Internet of Things, 12th IEEE International Conference on Green Computing and Communications, 9th IEEE International Conference on Cyber, Physical, and Social Computing and 2016 IEEE International Conference on Smart Data, iThings-GreenCom-CPSCom-Smart Data 2016
CountryChina
CityChengdu
Period16/12/1616/12/19

Keywords

  • Coordinate rotation digital computer
  • Rotation strategy
  • Unified CORDIC

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Safety, Risk, Reliability and Quality
  • Communication

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  • Cite this

    Wang, S., Yu, J., Chen, K. T., & Baba, T. (2017). A CORDIC with Unified Rotation Strategy. In Proceedings - 2016 IEEE International Conference on Internet of Things; IEEE Green Computing and Communications; IEEE Cyber, Physical, and Social Computing; IEEE Smart Data, iThings-GreenCom-CPSCom-Smart Data 2016 (pp. 744-749). [7917185] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/iThings-GreenCom-CPSCom-SmartData.2016.157