Estimation and compensation method for IQ imbalance
US8594241B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 2010 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Feb 17, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2647
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method and apparatus for estimating and compensating IQ imbalance of a baseband sampling digital communication receiver in digital time domain. Specifically, after an analog-to-digital converter (ADC) in the baseband sampling system, a structure including a crosstalk gain estimator, a Q-path gain estimator, an IQ imbalance compensator, and a lock detector is utilized to execute IQ imbalance estimation and compensation. In contrast to real-time frequency domain estimator/compensator, the present invention requires very little or no additional memory and delay processing, and therefore provides the estimation apparatus and method with convenience.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.