US 11,815,609 B2
System and method for time-of-flight determination using categorization of both code and phase in received signal
Wensheng Hua, Fremont, CA (US)
Assigned to STAR ALLY INTERNATIONAL LIMITED, Tortola (VG)
Filed by STAR ALLY INTERNATIONAL LIMITED, Tortola (VG)
Filed on Jan. 23, 2023, as Appl. No. 18/100,531.
Application 18/100,531 is a division of application No. 16/870,488, filed on May 8, 2020, granted, now 11,592,576.
Claims priority of provisional application 62/964,950, filed on Jan. 23, 2020.
Claims priority of provisional application 62/846,240, filed on May 10, 2019.
Prior Publication US 2023/0161051 A1, May 25, 2023
Int. Cl. G01S 19/29 (2010.01); G01S 19/43 (2010.01); G01S 19/37 (2010.01); G01S 19/39 (2010.01); G01S 19/30 (2010.01)
CPC G01S 19/29 (2013.01) [G01S 19/30 (2013.01); G01S 19/37 (2013.01); G01S 19/393 (2019.08); G01S 19/43 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for detecting a probe signal at an estimated code delay and an estimated doppler frequency, comprising:
(i) dividing a period of the probe signal into sections each of a predetermined duration;
(ii) assigning to each section one of a plurality of code categories, each code category being indicative of a signal pattern of the probe signal within the section;
(iii) selecting a plurality of phase categories for a sinusoidal signal, each phase category being indicative of a range of phases in the sinusoidal signal;
(iv) receiving a signal from which the probe signal is to be detected;
(v) dividing the received signal into sections each of the predetermined duration;
(v) assigning each section of the received signal both a corresponding code category and a corresponding phase category, based respectively on the estimated code delay and the doppler frequency; and
(vi) separately accumulating sections of the received signal according to the assigned code and phase categories of each section.