Phase rotation of IQ origin
US7839954B1 · kind B1 · utility
2Cited by
5References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 19, 2007 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Jul 30, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C2200/0079
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Sampled IQ values at the origin are revalued by applying a minimum distance, or radius, away from the (0,0) coordinate in the IQ domain, and applying a rotation about the origin for consecutive (0,0) samples, thereby improving communication performance. A direction of rotation is able to be predetermined or dynamically determined according to a correction look-up table or an IQ trajectory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.