Apparatus and method for hardware implementation of a digital phase shifter
US6393083B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1998 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Jul 31, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0063
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for an improved hardware implementation of a digital phase shifter which provides a simplified process for phase correction of digital signals and eliminates the use of a lookup ROM and complex digital Multipliers. The digital phase shifter operates by applying a phase correction to complex digital I/Q samples in separate stages, where each stage performs a phase rotation by an amount specified directly by the binary values of an integer input phase. In one aspect, an apparatus for applying a phase shift to a complex digital signal comprises a plurality of phase shift stages each having a phase shift value associated therewith, whereby each of the plurality of phase shift stages selectively applies the corresponding phase shift value to the complex digital signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.