US 11,855,682 B2
Radio signal device and method for fast time ambiguity resolution
Jose Antonio Garcia Molina, AG Noordwijk (NL); and Stefan Wallner, AG Noordwijk (NL)
Assigned to European Space Agency, AG Noordwijk (NL)
Appl. No. 17/759,916
Filed by ESA—European Space Agency, AG Noordwijk (NL)
PCT Filed Feb. 12, 2020, PCT No. PCT/EP2020/053581
§ 371(c)(1), (2) Date Aug. 1, 2022,
PCT Pub. No. WO2021/160256, PCT Pub. Date Aug. 19, 2021.
Prior Publication US 2023/0065422 A1, Mar. 2, 2023
Int. Cl. H04B 1/7075 (2011.01)
CPC H04B 1/7075 (2013.01) 17 Claims
OG exemplary drawing
 
1. A radio signal device configured to transmit a radio signal, the radio signal comprising a first signal component and a second signal component, wherein:
the first signal component comprises a first overlay code of X1 first overlay code symbols modulated on a first primary code, the first overlay code having a first overlay code duration of C1 units of time, wherein each of the first overlay code symbols have a duration of S1 units of time, and
the second signal component comprises a second overlay code of X2 second overlay code symbols modulated on a second primary code, the second overlay code having a second overlay code duration of C2 units of time, wherein each of the second overlay code symbols has a duration of S2 units of time, wherein either
the overlay code duration C1 of the first signal component and the overlay code duration C2 of the second signal component are chosen such that the start or the end of the first overlay code and the second overlay code have a reference code phase offset of D units of time every 2N units of time, wherein 2N is an integer and equivalent to the least common multiple of C1 and C2, or
the overlay code duration C1 of the first signal component and the overlay code symbol duration S2 of the second signal component are chosen such that the start or the end of the first overlay code and the second overlay code symbol have a reference code phase offset of D units of time every 2N units of time, wherein 2N is an integer and equivalent to the least common multiple of C1 and S2.