Method and system for estimating and compensating IQ imbalance
US7313203B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 22, 2004 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Feb 28, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/003
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of determining IQ imbalance introduced on an RF multicarrier signal received via a channel on a direct conversion analog receiver is disclosed. In one embodiment, the method comprises i) receiving a training signal on the receiver, ii) demodulating the training signal on the receiver, iii) estimating a first frequency domain channel characteristic of the channel based on the demodulated training signal, iv) defining a predetermined relationship between a corrected frequency domain channel characteristic of the channel and the first channel characteristic, the predetermined relationship comprising at least one IQ imbalance parameter, and v) determining the at least one IQ imbalance parameter such that the corrected channel characteristic satisfies a channel constraint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.