Method and system for measuring IQ path mismatch
AssigneeBroadcom Corporation
InventorsAkira Yamanaka, Iason Vassiliou
Life of this patent
Estimating the term…
Abstract
Aspects for measuring IQ path mismatch in signal modulation are described. The aspects include estimating a transmitter IQ mismatch in a form of gain and phase response for transmitter I and Q paths sharing a receiver path, and estimating a receiver IQ mismatch in a form of gain and phase response for receiver I and Q paths sharing a signal source. Further included is compensating for the difference of the transmitter and receiver I and Q paths using a digital FIR filter. Iterative estimation is utilized for filter tap parameters during the compensating.
Claims20
A method for measuring IQ path mismatch in transceivers, the method comprising:
- estimating a transmitter IQ mismatch in a form of gain and phase response for transmitter in-phase (I) and quadrature (Q) paths sharing a receiver path;
- and
- estimating a receiver IQ mismatch in a form of gain and phase response for receiver I and Q paths sharing a signal source,
- wherein the estimating of the transmitter IQ mismatch comprises measuring a difference in the gain and phase response between the transmitter I and Q paths, and the estimating of the receiver IQ mismatch comprises measuring a difference in the gain and phase response between the receiver I and Q paths.
A system for estimation of IQ path mismatch during signal modulation, the system comprising
- a transceiver, the transceiver comprising a transmitter and a receiver;
- and
- a processor coupled to the transceiver, the processor identifying a transmitter IQ mismatch in a form of gain and phase response for transmitter in-phase (I) and quadrature (Q) paths sharing a receiver path, and identifying a receiver IQ mismatch in a form of gain and phase response for receiver I and Q paths sharing a signal source,
- wherein the estimating of the transmitter IQ mismatch comprises measuring a difference in the gain and phase response between the transmitter I and Q paths, and the estimating of the receiver IQ mismatch comprises measuring a difference in the gain and phase response between the receiver I and Q paths.
A method for estimating IQ path mismatch in a transceiver, the method comprising:
- measuring a difference in the gain and phase response between transmitter in-phase (I) and quadrature (Q) paths and between receiver I and Q paths of a transceiver, the transmitter I and Q paths sharing a receiver path and the receiver I and Q paths sharing a signal source;
- and
- compensating for the difference of the transmitter and receiver I and Q paths using a digital FIR filter.
A system for estimation of IQ path mismatch during signal modulation, the system comprising
- a processor operatively coupled to a transceiver comprising a transmitter and a receiver, the processor identifying a transmitter IQ mismatch in a form of gain and phase response for transmitter in-phase (I) and quadrature (Q) paths sharing a receiver path, and identifying a receiver IQ mismatch in a form of gain and phase response for receiver I and Q paths sharing a signal source,
- wherein the estimating of the transmitter IQ mismatch comprises measuring a difference in the gain and phase response between the transmitter I and Q paths, and the estimating of the receiver IQ mismatch comprises measuring a difference in the gain and phase response between the receiver I and Q paths.
Dependencies are inferred from the claim text.