Patent
A security system
Christopher Richard Bottomley,Jeremy John Greenwood,Kevin Talbot +2 more
- 17 Sep 2001
59
TL;DR: In this article, a security system consisting of a passive entry and passive re-mobilisation system is described. But the security system is not suitable for use in a vehicle and the security controller transmits a command signal LCs to a remote transponder, which replies with an LF response signal LRs.
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Abstract: A security system is disclosed which is suitable for use in a vehicle. The security system comprises a passive entry and passive re-mobilisation system in which a security controller (10) transmits a command signal LCs to a remote transponder (14), which replies with an LF response signal LRs. If an LF response signal is not received in response to the transmission of a command signal LCs, the security controller (14) re-transmits the command signal, again as an LF command signal LCs. On determining that a command signal is a re-transmitted command signal, the remote transponder (14) re-transmits the response signal as an UHF response signal URs.
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Citations
Patent
Locking system, in particular for a motor vehicle
Michael Geber,Andreas Pohlmann,Matthias Reinhardt,Markus Ruther,Uwe Hipp,Johannes Mattes,Karl Mueller,Dietmar Weisser +7 more
- 20 Jan 2003
TL;DR: In this paper, a locking system for an operation-independent access or driving authorisation in the form of a keyless entry/starter function and/or for the operation-dependent access/driving authorisation for a motor vehicle is presented.
136
Patent
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Satoshi Nakajima,Satoshi Hayasaka,Akiyuki Takoshima +2 more
- 09 May 2007
TL;DR: In this article, a keyless entry device can accurately judge or determine whether a portable device exists inside or outside a vehicle, based on the intensity information of the request signal received from the portable device.
90
Patent
Keyless entry system
Satoshi Nakajima,Satoshi Hayasaka +1 more
- 30 Jan 2007
TL;DR: In this article, an on-vehicle control unit includes a memory storing a first data group having signal strength information of request signals transmitted from a plurality of transmitting antennas before and after movement of a movable object when a portable device is placed along an inner surface of a vehicle.
60
Patent
Method for searching for signals among interference signals in a multi-channel radio receiver
Christian Kursawe,Thomas Reisinger,Jürgen Schmid,Franz Xaver Stolz +3 more
- 24 Jan 2007
TL;DR: In this paper, a method for searching for signals among interference signals in a multi-channel radio receiver, at least two different data signals are transmitted on at least one physical channel of a radio system to a common receiver.
54
Patent
Reducing false wake-up in a low frequency transponder
James B. Nolan,Thomas Youbok Lee,Alan Lamphier,Ruan Lourens,Steve Vernier +4 more
- 14 Apr 2005
TL;DR: In this paper, a bidirectional remote keyless entry (RKE) transponder consisting of an analog front-end (AFE) having a programmable wake-up filter that predefines the waveform timing of the desired input signal and independently controllable channel gain reduction of each of its three channels, X, Y, and Z.
47
References
Patent
Passive keyless entry system.
Thomas Joseph Waraksa,Keith Douglas Fraley,Richard Edgar Kiefer,Daniel George Douglas,Lee Herman Gilbert +4 more
- 24 May 1989
TL;DR: In this paper, a passive keyless entry system for automotive vehicles is described, which is designed to automatically unlock the vehicle as the operator approaches the vehicle and lock the vehicle when the operator moves away from the vehicle.
251
Patent
Transponder systems for automatic identification purposes
Loek D'hont,Anne Tip,Herbert Meier +2 more
- 28 Sep 1993
TL;DR: In this paper, a method of communicating between an interrogator (10) and at least a first and second transponder (12) is presented. But the method has the steps of providing first and a second LF antenna (16) associated with and proximity to a first-and second traffic lane, respectively.
235
Patent
Frequency diversity transponder arrangement
Josef H. Schuermann
- 02 Jul 1993
TL;DR: In this paper, a method of communicating between a transponder and an interrogator is described, in which the interrogator transmits a wireless RF interrogation, which is received by the Transponder (12).
180
Patent
Keyless vehicle entry system employing portable transceiver having low power consumption
George P. Lambropoulos
- 15 Apr 1997
TL;DR: In this article, a portable transceiver is provided for use with a remote keyless entry system for controlling the locking-unlocking functions of a motor vehicle door lock and causing performance of a vehicle function.
105
Patent
Anti-theft system for a motor vehicle
Robert Murr,Bernhard Foerstl,Thomas Roehrl,Herbert Zimmer +3 more
- 28 Aug 1995
TL;DR: In this paper, an anti-theft system for a motor vehicle includes a transceiver disposed in a vehicle and a portable transponder, where energy signals are transmitted inductively to the transceiver, where they charge an energy storing device.
91
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