公开(公告)号：WO2007069140A3

公开(公告)日：2007-06-21

申请号：PCT/IB2006/054628

申请日：2006-12-06

Applicant: NXP B.V. ,  RAUBER, Michael ,  ARNITZ, Daniel

Inventor： RAUBER, Michael ,  ARNITZ, Daniel

IPC: G06K7/00 ,  H04L1/00

Abstract: A method of communication between an RFID reader (1) and a plurality of transponders (2a, 2b) via a radio channel (20) is disclosed. The method comprises the steps of measuring a noise level (SN) of the radio channel (20), selecting an error correction algorithm (ECAl, ECA2, .. ECAx) depending on the result of the noise level (SN) measurement, and setting both the RFID reader (1) and the transponders (2a, 2b) to the selected error correction algorithm. Furthermore, an RFID reader (1) is disclosed, which is adapted to perform the method according to the invention.

公开(公告)号：WO2004114205A1

公开(公告)日：2004-12-29

申请号：PCT/IB2004/050966

申请日：2004-06-22

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  AMTMANN, Franz ,  RAGGAM, Peter ,  RAUBER, Michael

Inventor： AMTMANN, Franz ,  RAGGAM, Peter ,  RAUBER, Michael

IPC: G06K19/07

CPC classification number: G06K19/0701 ,  G06K7/0008 ,  G06K19/0715 ,  G06K19/0723

Abstract: In a data carrier (1), there are provided modification means (19) for modifying, as a function of the distance between the data carrier (1) and the base station (4), the ratio of the duration of a load period (TB) to the duration of an off-load period (TE), at which ratio the data carrier (1) load-modulates the electromagnetic field (HF) generated by a base station (4).

Abstract translation: 在数据载体（1）中，提供了修改装置（19），用于根据数据载体（1）和基站（4）之间的距离来修改加载周期的持续时间（ TB）到负载时段（TE）的持续时间，在该比率下，数据载体（1）负载调制由基站（4）产生的电磁场（HF）。

公开(公告)号：WO2006106481A1

公开(公告)日：2006-10-12

申请号：PCT/IB2006/051021

申请日：2006-04-04

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  RAUBER, Michael ,  WATZINGER, Hubert ,  AMTMANN, Franz

Inventor： RAUBER, Michael ,  WATZINGER, Hubert ,  AMTMANN, Franz

IPC: G06K7/00

CPC classification number: G06K19/0726 ,  G06K7/0008

Abstract: An RFID reader (1, 1') comprises a signal generator (2) for generating high frequency electrical signals (ES) and an antenna (3) to which the high frequency electrical signals (ES) are feedable in a symmetric mode. The RFID reader (1) further comprises tuning means (4, 4') for maintaining the antenna (3) in a symmetric operating mode, wherein the tuning means (4, 4') are controllable in dependency of varying coupling impedances (CG) occurring between the antenna (3) and its environment (G).

Abstract translation: RFID读取器（1,1）包括用于产生高频电信号（ES）的信号发生器（2）和高频电信号（ES）可以以对称模式馈送的天线。 RFID读取器（1）还包括用于将天线（3）维持在对称操作模式的调谐装置（4,4'），其中根据变化的耦合阻抗（CG）可调节调谐装置（4,4'）， 发生在天线（3）和其环境（G）之间。