US 12,244,396 B1
Configurable orthogonal frequency division multiplexing (OFDM) signal and transmitter and receiver for satellite to gateway uplink and downlink communications
Martin S. McCormick, El Segundo, CA (US); Torbjorn Larsson, Escondido, CA (US); Alazar Tamrat, Torrance, CA (US); Jeffrey C. Strait, Reno, NV (US); Chen Chen, Irvine, CA (US); Philip J. Treigherman, Fountain Valley, CA (US); Stephan O. Roche, Rancho Palos Verdes, CA (US); and Ronald Gottula, San Mateo, CA (US)
Assigned to Space Exploration Technologies Corp., Hawthorne, CA (US)
Filed by Space Exploration Technologies Corp., Hawthorne, CA (US)
Filed on Feb. 26, 2021, as Appl. No. 17/186,579.
Claims priority of provisional application 62/983,651, filed on Feb. 29, 2020.
Claims priority of provisional application 62/983,649, filed on Feb. 29, 2020.
Claims priority of provisional application 62/983,644, filed on Feb. 29, 2020.
Claims priority of provisional application 62/983,641, filed on Feb. 29, 2020.
Int. Cl. H04B 7/185 (2006.01); H04L 5/00 (2006.01); H04W 72/0453 (2023.01)
CPC H04B 7/18513 (2013.01) [H04L 5/0048 (2013.01); H04W 72/0453 (2013.01)] 39 Claims
OG exemplary drawing
 
1. A modem comprising:
a transmitter configurable to transmit a first waveform from a satellite (SAT) to a satellite access gateway (SAG) at a first bandwidth and configurable to transmit a second waveform from the SAG to the SAT at a second bandwidth, the first waveform and the second waveform comprising:
a unique word configured in a first time period of a burst in a radio frame;
a channel estimation symbol configured in a second time period of the burst of the radio frame, the second time period adjacent to the first time period, the channel estimation symbol being associated with user data and covering a set of frequency resources;
a first pilot subcarrier at a first frequency in a third time period of the burst in the radio frame;
a second pilot subcarrier at a second frequency in the third time period of the burst in the radio frame; and
one or more resource blocks configured in the third time period of the burst in the radio frame and configured to use the set of frequency resources between the first pilot subcarrier and the second pilot subcarrier; and
a receiver configured to receive the first waveform or the second waveform, wherein the modem is configurable for use on the SAT or the SAG.