US 9,811,956 B2
Passive entry system and method for a vehicle
Riad Ghabra, Dearborn Heights, MI (US)
Assigned to Lear Corporation, Southfield, MI (US)
Filed by Lear Corporation, Southfield, MI (US)
Filed on Sep. 1, 2015, as Appl. No. 14/842,002.
Application 14/842,002 is a continuation of application No. 12/478,931, filed on Jun. 5, 2009, granted, now 9,129,454.
Prior Publication US 2015/0371471 A1, Dec. 24, 2015
Int. Cl. G07C 9/00 (2006.01); B60R 25/00 (2013.01)
CPC G07C 9/00103 (2013.01) [B60R 25/00 (2013.01); G07C 9/00309 (2013.01); G07C 2209/63 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
transmitting polling signals from antennas at respective positions about a vehicle, each polling signal including identifying information;
receiving an acknowledgement signal from a remote unit, the acknowledgement signal including data within the acknowledgment signal indicative of each polling signal received by the remote unit; and
determining a position of the remote unit relative to the vehicle based upon the data within the acknowledgement signal.