Complex multiplier and twiddle factor generator
US8161093B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 26, 2007 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Feb 15, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F17/142
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a complex multiplier and a twiddle factor generator. The complex multiplier according to an embodiment of the invention includes: a first adder/subtracter that adds the real part of the complex number and a first twiddle factor or subtracts the first twiddle factor from the real part of the complex number according to a first signal; a second adder/subtracter that adds the imaginary part of the complex number and a second twiddle factor or subtracts the second twiddle factor from the imaginary part of the complex number according to a second signal; a first multiplier that multiplies the value obtained by the first adder/subtracter by a third twiddle factor and outputs the resulting value; a second multiplier that multiplies the value obtained by the second adder/subtracter by a fourth twiddle factor and outputs the resulting value; a multiplexer that selectively outputs the values output from the first and second multipliers as a real part output signal and an imaginary part output signal according to a third signal; and a controller that provides the first to third signals. According to the present invention, it is possible to achieve a complex mu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.