公开(公告)号：US11889436B2

公开(公告)日：2024-01-30

申请号：US16995658

申请日：2020-08-17

Applicant: QUALCOMM Incorporated

Inventor： Jay King ,  Alexander Dorosenco ,  Muhammad Sayed Khairy Abdelghaffar ,  Joseph Binamira Soriaga ,  Carl Hardin ,  Alexandros Manolakos ,  James Krysl ,  Michael Allen Kongelf ,  Krishna Kiran Mukkavilli ,  Tingfang Ji ,  Joseph Patrick Burke

IPC: H04W56/00

CPC classification number: H04W56/0005 ,  H04W56/004 ,  H04W56/009

Abstract: The transmission and reception group delay in a front end structure of a mobile device may be determined using closed loop calibration. The closed loop may be a near field radiated closed loop between pairs of antennas in an antenna array of the mobile device. The delay based on time of transmission and time of reception may be measured for a plurality of pairs of antennas, from which the transmit and receive group delay within a single path may be determined. The propagation delay of the signal between antennas may be included in the group delay calibration for increased accuracy. In another implementation, a conducted closed loop, e.g., in the transceiver or in a radio frequency switching network may be used to calibrate the group delay. Pre-characterization of the delay caused by components between the closed loop and antennas may be included in the group delay calibration for increased accuracy.