US 12,470,262 B2
Method and apparatus for calibration in distributed mimo networks
Jianzhong Zhang, Dallas, TX (US); Yang Li, Plano, TX (US); Gilwon Lee, Dallas, TX (US); Yeqing Hu, Allen, TX (US); Shadi Abu-Surra, Plano, TX (US); and Md. Saifur Rahman, Plano, TX (US)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jun. 6, 2023, as Appl. No. 18/330,316.
Claims priority of provisional application 63/395,637, filed on Aug. 5, 2022.
Claims priority of provisional application 63/394,898, filed on Aug. 3, 2022.
Prior Publication US 2024/0048191 A1, Feb. 8, 2024
Int. Cl. H04B 7/0417 (2017.01); H04B 7/0452 (2017.01); H04L 5/00 (2006.01)
CPC H04B 7/0417 (2013.01) [H04B 7/0452 (2013.01); H04L 5/0053 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A first base station (BS), comprising:
a transceiver configured to receive a first uplink (UL) reference signal (RS); and
a processor operably coupled to the transceiver, the processor configured to determine, based on the first UL RS and a second UL RS, a first phase offset for transmission of a first downlink (DL) RS to a user equipment (UE),
wherein the second UL RS is associated with a second BS,
wherein the first phase offset of the first DL RS is relative to a second DL RS associated with the second BS,
wherein the transceiver is further configured to:
transmit the first DL RS with the first phase offset, and
receive, from the UE, feedback associated with the first DL RS and the second DL RS, and
wherein the processor is further configured to determine, based on the first phase offset and the received feedback, for a DL data transmission to the UE, a second phase offset between transmissions of the first BS and the second BS.