Efficient angle rotator configured for dynamic adjustment
US8131793B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 9, 2007 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Sep 20, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/4818
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for angle is disclosed to rotate a complex input by the angle θ to produce a rotated complex output signal. A memory storage device generates control information based on a coarse angle θM. A coarse rotation butterfly circuit uses the control information to rotate the complex input signal by the coarse angle θM to produce an intermediate complex number. The control information controls one or more multiplexers and/or adders in the coarse rotation butterfly circuit to information to rotate the complex input signal. The fine rotation butterfly circuit uses the control information to rotate the intermediate complex number by a fine angle θL to produce the complex output signal. The control information controls one or more multiplexers and/or adders in the fine rotation butterfly circuit to rotate the intermediate complex number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.