US 12,224,893 B2
Systems, methods and devices for joint calibration of transmit and receive IQ mismatch
Elina Nayebi, San Diego, CA (US); Pranav Dayal, San Diego, CA (US); Kee-Bong Song, San Diego, CA (US); Siu-Chuang Ivan Lu, San Jose, CA (US); and Sang Won Son, Palo Alto, CA (US)
Assigned to SAMSUNG ELECTRONICS CO., LTD., (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jun. 13, 2023, as Appl. No. 18/209,473.
Application 18/209,473 is a continuation of application No. 17/064,598, filed on Oct. 6, 2020, granted, now 11,695,614.
Claims priority of provisional application 63/025,974, filed on May 15, 2020.
Prior Publication US 2023/0327939 A1, Oct. 12, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 27/36 (2006.01); H04L 27/148 (2006.01); H04L 27/20 (2006.01); H04L 27/26 (2006.01); H04L 27/38 (2006.01)
CPC H04L 27/364 (2013.01) [H04L 27/148 (2013.01); H04L 27/2003 (2013.01); H04L 27/2695 (2013.01); H04L 27/3863 (2013.01)] 19 Claims
OG exemplary drawing
 
17. A system comprising:
a quadrature transceiver having a transmit path with a quadrature up-converter, a receive path with a quadrature down-converter, and a loopback path coupled between the up-converter and the down-converter;
a signal observer arranged to capture a first and second pilot signals received from the receive path;
a phase shifter arranged to apply a phase shift to at least one of the first and second pilot signals between the up-converter and the down-converter; and
a processor configured to:
obtain joint estimates of transmit and receive in-phase (I) and quadrature (Q) mismatch (IQMM) in part by estimating the phase shift, and in part by processing the first and second pilot signals as a function of one or more frequency-dependent IQMM parameters; and
compensate for the IQMM using the joint estimates of the transmit and receive IQMM.