Vector NCO and twiddle factor generator
US9087003B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2012 |
| Grant date | Jul 21, 2015 |
| Priority date | — |
| Expiry date | Oct 3, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F17/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus may be used to generate complex exponentials for either frequency domain or time domain applications by programming input parameter values into a complex exponential vector generator (260) having a frequency generator stage (281) and a vector phase accumulator stage (282) arranged with a vector element multiplier stage (283) to generate complex exponential phase index values (α0, α1, . . . αv−1) that are processed by a complex exponential generator stage (284) to output a plurality of complex exponential values (e.g., ej2πα, ej2πα, . . . ej2πα) that may be rearranged by a permutation unit (286) for use by vector data path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.