US 11,921,522 B2
Sub-meter accurate navigation and cycle slip detection with long-term evolution (LTE) carrier phase measurements
Zak Kassas, Irvine, CA (US); and Kimia Shamaei, Irvine, CA (US)
Assigned to The Regents of the University of California, Oakland, CA (US)
Filed by The Regents of the University of California, Oakland, CA (US)
Filed on Nov. 3, 2020, as Appl. No. 17/088,232.
Claims priority of provisional application 62/930,298, filed on Nov. 4, 2019.
Prior Publication US 2021/0373180 A1, Dec. 2, 2021
Int. Cl. H04M 1/725 (2021.01); G01S 5/14 (2006.01); G05D 1/00 (2006.01); G06F 17/18 (2006.01); H04M 1/663 (2006.01)
CPC G05D 1/101 (2013.01) [G01S 5/145 (2013.01); G06F 17/18 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for navigation using cycle slip detection, the method comprising:
receiving, by a device, a broadband communication signal;
processing, by the device, the broadband communication signal based on a navigation framework to determine at least one carrier phase measurement;
compensating, by the device, for at least one error of the at least one carrier phase measurement using at least one detected cycle slip, wherein compensating for at least one error includes removing an effect of a receiver clock bias on the at least one carrier phase measurement relative to a reference transmitter within a plurality of transmitters by detecting the occurrence of cycle slips according to:

OG Complex Work Unit Math
wherein A is a number of antenna ports of the LTE SDR, and wherein cycle slips occur when Δϕ12(u)(n) exceeds a threshold;
determining, by the device, a position for the device based on the at least one carrier phase measurement and the at least one error; and
outputting, by the device, a navigation observable based on the position determined for the device.