View source for SYSTEMS, METHODS AND DEVICES FOR JOINT CALIBRATION OF TRANSMIT AND RECEIVE IQ MISMATCH: abstract simplified (18209473)

*This abstract for appeared for patent application  number 18209473 Titled 'SYSTEMS, METHODS AND DEVICES FOR JOINT CALIBRATION OF TRANSMIT AND RECEIVE IQ MISMATCH'

==Simplified Explanation==

The abstract describes a method for compensating for IQ mismatch (IQMM) in a transceiver. IQMM refers to a situation where the in-phase (I) and quadrature (Q) components of a signal are not properly aligned. 

In this method, the transceiver sends two signals (first and second) from the transmit path through a loopback path. A phase shifter is used to introduce a phase shift in at least one of these signals. The receive path then receives these signals, resulting in first and second received signals.

The first and second received signals are used to estimate the IQMM, specifically the phase shift introduced by the phase shifter. This estimation helps in compensating for the IQMM. The estimation process may involve considering frequency-dependent IQMM parameters.

Overall, the method aims to address IQ mismatch in a transceiver by using loopback signals, phase shifting, and estimation techniques to compensate for the mismatch.


==Original Abstract Submitted==

A method of compensating for IQ mismatch (IQMM) in a transceiver may include sending first and second signals from a transmit path through a loopback path, using a phase shifter to introduce a phase shift in at least one of the first and second signals, to obtain first and second signals received by a receive path, using the first and second signals received by the receive path to obtain joint estimates of transmit and receive IQMM, at least in part, by estimating the phase shift, and compensating for IQMM using the estimates of IQMM. Using the first and second signals received by the receive path to obtain estimates of the IQMM may include processing the first and second signals received by the receive path as a function of one or more frequency-dependent IQMM parameters.