Patent · US Expired

Time domain estimation of IQ imbalance in a wireless OFDM direct conversion receiver

US7366255B1 · kind B1 · utility

12Cited by

2References

10Claims

0Family size

Assignee

Advanced Micro Devices, Inc. · US

Inventors

Chien-Meen Hwang · Stanford, US
Harish Kutagulla · Austin, US
Thomas Hanusch · Dresden, DE

Key dates

Filing date	Aug 4, 2003
Grant date	Apr 29, 2008
Priority date	—
Expiry date	Aug 31, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2027/0016
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

An OFDM receiver is configured for suppressing pilot energy, and DC energy, from received I and Q components prior to estimating amplitude and phase imbalances of the received I and Q components. Hence, amplitude and phase imbalances can be estimated accurately despite channel fading and frequency variations between the transmitter and receiver.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.