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Non-recursive digital calibration for joint-elimination of transmitter and receiver I/Q imbalances with minimized add-on hardware
Wei-Han Yu; Chak-Fong CHEANG; Ka-Fai UN; Pui-In Mak; Rui P. Martins
Rights HolderUniversity of Macau
Date Available2016-03-01
CountryUnited States
Subtype发明专利
Abstract

A digital calibration circuit is used to provide joint-elimination of transmitter and receiver I/Q imbalances. Digital I and Q quadrature signals are received and converted to analog I and Q quadrature signals on I and Q for transmission on output channels. An output mixer is used to convert the quadrature signals to an unbalanced RF output. An unbalanced RF signal is received selectively either externally or from the RF output using a source follower, and the received signal is mixed to provide analog I and Q quadrature signals, using a local oscillator (LO). The LO adds an additional 90 ° phase shift between I and Q quadrature channels of the unbalanced RF input. Parameter estimating the transmitted digital I and Q quadrature signals and providing estimations of I and Q quadrature imbalance conditions.

Application Date2014-03-26
Patent NumberUS9276798B2
Language英语
Application NumberUS14226032
Open (Notice) NumberUS9276798B2
Fulltext Access
Document TypePatent
CollectionINSTITUTE OF MICROELECTRONICS
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
AffiliationUniversity of Macau
Recommended Citation
GB/T 7714
Wei-Han Yu,Chak-Fong CHEANG,Ka-Fai UN,et al. Non-recursive digital calibration for joint-elimination of transmitter and receiver I/Q imbalances with minimized add-on hardware. US9276798B2.
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