US 12,341,582 B2
Systems and methods for mitigating interference within actively used spectrum
Stephen G. Perlman, Palo Alto, CA (US); Antonio Forenza, San Francisco, CA (US); Mario Di Dio, San Francisco, CA (US); and Fadi Saibi, San Francisco, CA (US)
Assigned to Rearden, LLC, Mountain View, CA (US)
Filed by Rearden, LLC, Mountain View, CA (US)
Filed on Feb. 8, 2022, as Appl. No. 17/667,230.
Application 17/667,230 is a continuation of application No. 17/361,252, filed on Jun. 28, 2021, granted, now 11,290,162.
Application 17/361,252 is a continuation of application No. 15/682,076, filed on Aug. 21, 2017, granted, now 11,050,468, issued on Jun. 29, 2021.
Application 15/682,076 is a continuation in part of application No. 14/672,014, filed on Mar. 27, 2015, granted, now 11,190,947, issued on Nov. 30, 2021.
Claims priority of provisional application 62/380,126, filed on Aug. 26, 2016.
Claims priority of provisional application 61/980,479, filed on Apr. 16, 2014.
Prior Publication US 2022/0166474 A1, May 26, 2022
Int. Cl. H04B 7/0456 (2017.01); H04B 7/06 (2006.01); H04B 15/00 (2006.01); H04L 5/14 (2006.01)
CPC H04B 7/0456 (2013.01) [H04B 7/0626 (2013.01); H04B 15/00 (2013.01); H04L 5/14 (2013.01); Y02D 30/70 (2020.08)] 14 Claims
OG exemplary drawing
 
1. A ground-based wireless transceiver station configured to create a plurality of concurrent and independent orthogonal frequency-division multiplexing (“OFDM”) wireless links between the ground-based wireless transceiver station and a plurality of user devices within a same frequency band, the plurality of wireless links formed over multipath downlink or uplink channels;
wherein the ground-based wireless transceiver station comprises one or more computer processors that carry out instructions embodied in a non-transitory computer readable medium so that the ground-based wireless transceiver station is configured to create the plurality of concurrent and independent OFDM wireless links using a plurality of ground-based wireless transceiver station antennas equal to more than ten times a number of antennas configured to communicate over at least one of the uplink channels of the plurality of concurrent and independent OFDM wireless links of at least one user device;
wherein the ground-based wireless transceiver station is configured to create at least one of the plurality of concurrent and independent OFDM wireless links with at least one user device's antennas in or on an aircraft flying over the ground-based wireless transceiver station and at least one of the plurality of concurrent and independent OFDM wireless links with at least one ground-based user device's antennas; and
wherein the ground-based wireless transceiver station is configured to exploit channel reciprocity by estimating an uplink channel state information (CSI) between the plurality of ground-based wireless transceiver station antennas the at least one user device's antennas or the at least one ground-based user device's antennas and using it to derive a downlink CSI.