Method and apparatus for compensating for distortion in IQ modulators
US6400233B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2001 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Jan 10, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/368
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A distortion compensating apparatus for use in IQ modulation and demodulation techniques wherein a first distortion arrangement distorts the I-signal by adding to the I-signal a first weighted function of the I-signal and a first weighted function of the Q-signal and a second distortion arrangement distorts for Q-signal by adding to the Q-signal a second weighted function of the I-signal and a second weighted function of the Q-signal, such that the weighted functions of the I-signal are independent of the Q-signal and the weighted functions of the Q-signal are independent of the I-signal. This enable distortions to be compensated in both sidebands of the IQ modulated signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.