I/Q imbalance estimation and correction in a communication...

Details I/Q imbalance estimation and correction in a communication... I/Q imbalance estimation and correction in a communication...

2011-08-16

2011-08-16

Wang, Ted M (Department: 2611)

Pulse or digital communications

Transceivers

Loopback mode

C375S224000, C375S316000, C375S324000, C375S340000

Reexamination Certificate

active

08000382

ABSTRACT:
Certain aspects and embodiments provide for accurate measurement and estimation of imbalances between in-phase (I) and quadrature (Q) components of a complex baseband signal. The accuracy of I/Q phase imbalance estimates may be enhanced by conducting them on a transmitter and a receiver that are connected via a local, loopback connection and by removing cross-spectrum interference in transferred packets. Once these accurate I/Q phase imbalances are determined, they may be used to adjust a signal processed by the transmitter or the receiver to increase the performance and data throughput of communications using the signal.

REFERENCES:
patent: 7856050 (2010-12-01), Wiss et al.
patent: 2005/0047494 (2005-03-01), Sasson et al.
Declaration of Non-Establishment of International Search Report—PCT/US08/067166, International Searching Authority—European Patent Office, Dec. 11, 2008.
Written Opinion—PCT/US08/067166, International Searching Authority—European Patent Office, Dec. 11, 2008.

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