US 11,899,120 B2
Generation and transmission of navigation signals
Robert Martin Grayson, Los Alamitos, CA (US); Andrew Michael Neish, Sunnyvale, CA (US); and Joshua Earl McGhee, Tucson, AZ (US)
Assigned to Xona Space Systems Inc., Burlingame, CA (US)
Filed by Xona Space Systems Inc., Marquette, MI (US)
Filed on Jun. 30, 2021, as Appl. No. 17/364,060.
Prior Publication US 2023/0003907 A1, Jan. 5, 2023
Int. Cl. G01S 19/25 (2010.01); G01S 19/42 (2010.01); G01S 19/44 (2010.01)
CPC G01S 19/423 (2013.01) [G01S 19/258 (2013.01); G01S 19/44 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A satellite comprising:
at least one processor configured to execute operational instructions that cause the at least one processor to perform operations that include:
generating navigation data based on orbital state data;
generating a low band data stream and a high band data stream based on the navigation data and a data channel spreading sequence;
generating a low band pilot stream and a high band pilot stream based on a pilot channel spreading sequence; and
generating a low band navigation signal based on cross-correlating the low band data stream and the low band pilot stream in accordance with a bandwidth-efficient modulation scheme; and
generating a high band navigation signal based on cross-correlating the high band data stream and the high band pilot stream in accordance with the bandwidth-efficient modulation scheme; and
a navigation signal transmitter configured to broadcast the low band navigation signal and the high band navigation signal for receipt by at least one client device, the low band navigation signal and the high band navigation signal facilitating the at least one client device to determine state data of the at least one client device.