公开(公告)号：US20240151858A1

公开(公告)日：2024-05-09

申请号：US18495490

申请日：2023-10-26

Applicant: NextNav, LLC

Inventor： Arun RAGHUPATHY ,  Sameet DESHPANDE ,  Payam DEHGHANI RAHIMZADEH ,  Ganesh PATTABIRAMAN

IPC: G01S19/39 ,  G01S19/40

CPC classification number: G01S19/393 ,  G01S19/40

Abstract: A method includes a mobile device receiving a plurality of first signals from one or more first transmitters in a network. Each first signal has first data including an associated time that is non-synchronized to the time of another first signal of the plurality of first signals. One or more processors synchronizes the associated time of each first signal to a common time scale. One or more processors determines a position of the mobile device using a common time scale of the plurality of first signals.

公开(公告)号：US20170097421A1

公开(公告)日：2017-04-06

申请号：US15283819

申请日：2016-10-03

Applicant: NextNav, LLC

Inventor： Arun RAGHUPATHY ,  Chen MENG ,  Norman F. KRASNER ,  Sameet DESHPANDE

IPC: G01S19/11 ,  G01S19/25

CPC classification number: G01S19/11 ,  G01S19/25 ,  H04J13/00 ,  H04J13/0022 ,  H04J13/0029 ,  H04J13/14

Abstract: Generating signals from non-GNSS transmitters, and processing the signals using a GNSS positioning module. Systems and methods identify a chipping rate, identify a PN code length, generate a PN code that has a length equal to the identified PN code length, generate a positioning signal using the identified chipping rate and the generated PN code, and transmit the positioning signal from the transmitter. The PN code length may produce, at the identified chipping rate, a PN code duration that is equal to or is a multiple of a PN code duration used in a GNSS system, the identified chipping rate may be equal to or a multiple of a chipping rate used in a GNSS system, and the identified PN code length may be equal to or a multiple of a PN code length used in a GNSS system.