Cordic complex multiplier
US4896287A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 1988 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | May 31, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F7/5446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A CORDIC (COordinate Rotation DIgital Computer) subsystem for multiplication of two complex digital numbers B and C, where one number is the sum of real and imaginary data portions, expressed in rectangular form (say C.sub.r or C.sub.I), and the other number can be expressed in the rectangular form or can be represented by magnitude data, expressed in polar form (say, .vertline.B.vertline., .phi.). An N-stage CORDIC portion of either recursive or pipeline sequential form, but devoid of multipliers, is used to rotate the I and Q terms of the first number through a phase angle .phi. of the polar-form multiplier number of the equivalent, taken from the rectangular form. The final computed data are the real and imaginary parts of the product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.