US 11,808,870 B2
Position determination using time difference of arrival of single frequency network signals
Erik Stare, Sollentuna (SE); Sara Modarres Razavi, Linköping (SE); and Fredrik Gunnarsson, Linköping (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/290,570
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Nov. 4, 2019, PCT No. PCT/SE2019/051110
§ 371(c)(1), (2) Date Apr. 30, 2021,
PCT Pub. No. WO2020/091686, PCT Pub. Date May 7, 2020.
Claims priority of provisional application 62/755,066, filed on Nov. 2, 2018.
Prior Publication US 2021/0373116 A1, Dec. 2, 2021
Int. Cl. H04W 24/00 (2009.01); G01S 5/02 (2010.01); G01S 1/04 (2006.01); H04W 64/00 (2009.01); H04B 17/336 (2015.01)
CPC G01S 5/0205 (2013.01) [G01S 1/0428 (2019.08); H04W 64/003 (2013.01); H04B 17/336 (2015.01)] 20 Claims
OG exemplary drawing
 
1. A method, implemented by a receiving terminal, of receiving a positioning signal transmitted by two or more base stations, the method comprising the receiving terminal:
receiving, in a first time period, two or more variations of the positioning signal, the two or more variations of the positioning signal being transmitted synchronously by respective ones of the two or more base stations as a single frequency network (SFN) signal to effect one or more time shifts at the receiving terminal between different ones of the variations of the positioning signal; and
detecting time positions of impulses in a first composite channel impulse response of the SFN signal transmitted in the first time period, the impulses corresponding to the two or more variations of the positioning signal.