## 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 language | English |
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Title of host publication | 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 |

Publisher | Institute of Electrical and Electronics Engineers Inc. |

Pages | 744-749 |

Number of pages | 6 |

ISBN (Electronic) | 9781509058808 |

DOIs | |

Publication status | Published - 2017 May 1 |

Event | 9th 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 16 → 2016 Dec 19 |

### Other

Other | 9th 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 |
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Country | China |

City | Chengdu |

Period | 16/12/16 → 16/12/19 |

## Keywords

- Coordinate rotation digital computer
- Rotation strategy
- Unified CORDIC

## ASJC Scopus subject areas

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