US 11,943,043 B2
Uplink frequency target for non-terrestrial network
Xiao Feng Wang, San Diego, CA (US); Peter Gaal, San Diego, CA (US); Alberto Rico Alvarino, San Diego, CA (US); Jun Ma, San Diego, CA (US); Qiang Wu, San Diego, CA (US); Liangping Ma, San Diego, CA (US); Ayan Sengupta, San Diego, CA (US); and Dan Zhang, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on May 5, 2021, as Appl. No. 17/302,516.
Claims priority of provisional application 63/025,538, filed on May 15, 2020.
Prior Publication US 2021/0359752 A1, Nov. 18, 2021
Int. Cl. H04B 7/185 (2006.01); H04W 72/0453 (2023.01); G01S 19/29 (2010.01); H04W 88/16 (2009.01)
CPC H04B 7/18532 (2013.01) [H04W 72/0453 (2013.01); G01S 19/29 (2013.01); H04W 88/16 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A user equipment for wireless communication, comprising:
memory; and
one or more processors coupled to the memory, the memory and the one or more processors configured to:
estimate a Doppler drift, associated with a service link between the user equipment and a reference point for an uplink transmission, using a position of the user equipment and an ephemeris associated with the reference point, wherein the reference point is one of:
a satellite that provides a cell covering the user equipment, the satellite being associated with a non-terrestrial network, or
a gateway associated with the satellite;
determine a transmission frequency for the uplink transmission using the reference point and a target uplink frequency for signal reception at the reference point,
wherein the determining includes adjusting the transmission frequency to compensate for the estimated Doppler drift, and
wherein the transmission frequency is independent of a received downlink frequency of the user equipment; and
transmit the uplink transmission using the transmission frequency.