US 11,988,735 B2
Position information estimation in a distributed radio frequency (RF) communications system
Sharanya Srinivas, Tempe, AZ (US); Andrew Herschfelt, Phoenix, AZ (US); and Daniel W. Bliss, Scottsdale, AZ (US)
Assigned to Arizona Board of Regents on behalf of Arizona State University, Scottsdale, AZ (US)
Filed by Sharanya Srinivas, Tempe, AZ (US); Andrew Herschfelt, Phoenix, AZ (US); and Daniel W. Bliss, Scottsdale, AZ (US)
Filed on Nov. 4, 2020, as Appl. No. 17/089,074.
Claims priority of provisional application 62/930,232, filed on Nov. 4, 2019.
Prior Publication US 2021/0132177 A1, May 6, 2021
Int. Cl. G01S 11/08 (2006.01); G01S 5/00 (2006.01); G01S 5/02 (2010.01); H04B 7/185 (2006.01); H04L 5/14 (2006.01)
CPC G01S 11/08 (2013.01) [G01S 5/0036 (2013.01); G01S 5/0284 (2013.01); G01S 5/0289 (2013.01); H04B 7/18506 (2013.01); H04L 5/143 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method for estimating position information in a distributed radio frequency (RF) communications system, the method comprising:
receiving a first RF receive signal comprising a data payload having at least one frame, wherein the data payload indicates a transmit time stamp of the first RF receive signal and a frame length of the at least one frame and a first positioning sequence from a first network node at a second network node;
estimating a first time of arrival (ToA) of the first positioning sequence at the second network node;
estimating relative positional information of the second network node from the first network node based on the first ToA, the frame length of the at least one frame, a perceived frame length of the at least one frame, the transmit time stamp of the RF receive signal, and a perceived time stamp of the RF receive signal; and
transmitting a first RF transmit signal comprising the estimated first ToA.