US 12,382,247 B2
Vehicle road side location of a target via unwrapped differential phase RF signals
Sirajum Munir, Pittsburgh, PA (US); and Hongkai Chen, Smithtown, NY (US)
Assigned to Robert Bosch GmbH, (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Jul. 28, 2022, as Appl. No. 17/876,264.
Prior Publication US 2024/0040332 A1, Feb. 1, 2024
Int. Cl. H04W 4/00 (2018.01); G06N 20/00 (2019.01); H04B 7/06 (2006.01); H04W 4/02 (2018.01)
CPC H04W 4/025 (2013.01) [G06N 20/00 (2019.01); H04B 7/0626 (2013.01); H04B 7/0682 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for a vehicle comprising:
a multiple antenna radio frequency (RF) transceiver having an identification (ID); and
a processor coupled with the RF transceiver and configured to:
receive a request, via a first wireless connection, for the vehicle to travel to a location,
in response to the vehicle being less than a predetermined distance from the location, receive RF packets, via a second wireless connection, from a target at the location,
identify packets based on the ID of the RF transceiver,
extract channel state information (CSI) from received signals associated with the identified packets,
unwrap phase from the CSI of the received signals to obtain subcarrier phase data,
determine a phase difference of subcarriers of the received signals between each of the multiple antennae,
filter noise of the phase difference based on subcarrier selection to obtain multiple robust phase difference signals, and
feed the multiple robust phase difference signals to a Long Short-Term Memory (LSTM) classifier to obtain a side of the vehicle associated with the location of the target.