公开(公告)号：US20160234684A1

公开(公告)日：2016-08-11

申请号：US14615738

申请日：2015-02-06

Applicant: NXP B.V.

Inventor： Andries Hekstra ,  Arie Koppelaar ,  Stefan Drude ,  Frank Leong

IPC: H04W12/06 ,  H04L29/08

CPC classification number: H04W12/06 ,  G06F21/30 ,  G06F21/35 ,  H04K1/02 ,  H04K3/86 ,  H04L67/1095

Abstract: Distance-based authentication is provided for mitigating undesirable interaction and/or attacks upon ranging systems, such as those involving vehicle entry or secure payment. As may be implemented in accordance with one or more embodiments, a leading edge of one or more pulses in a waveform of a signal is obscured as part of distance-based authentication. For instance, noise may be generated via a noise modulation circuit and combined with some or all of a leading edge of a pulse. Distance-based authentication is provided by transmitting a signal with a waveform having the obscured portion of the leading edge, which operates to mitigate detection of the polarity of the leading edge or otherwise of the leading edge itself.

Abstract translation: 提供了基于距离的身份验证，以减轻对测距系统（例如涉及车辆进入或安全支付）的不期望的交互和/或攻击。 如可以根据一个或多个实施例来实现的，作为基于距离的认证的一部分，信号波形中的一个或多个脉冲的前沿被遮蔽。 例如，可以通过噪声调制电路产生噪声，并与脉冲的前沿中的一些或全部组合。 通过发送具有前沿的遮蔽部分的波形的信号来提供基于距离的认证，其操作以减轻前缘本身的前沿或其他方面的极性的检测。

公开(公告)号：US20160234008A1

公开(公告)日：2016-08-11

申请号：US14615696

申请日：2015-02-06

Applicant: NXP B.V.

Inventor： Andries Hekstra ,  Arie Koppelaar ,  Stefan Drude ,  Frank Leong

IPC: H04L7/027 ,  H04W12/06 ,  H04W4/00

CPC classification number: H04W4/80 ,  B60R25/246 ,  G01S13/751 ,  G01S13/76 ,  G01S13/82 ,  G07C9/00309 ,  G07C2009/00317 ,  H04L7/027 ,  H04L9/005 ,  H04L9/32 ,  H04L9/3271 ,  H04L2209/80 ,  H04L2209/84 ,  H04W12/06 ,  H04W12/08

Abstract: Using a clock circuit, a clock signal is generated at a base frequency. A frequency adjustment circuit selects, based upon a frequency offset value, a particular frequency adjustment value from a plurality of frequency adjustment values. An adjusted clock signal is provided that has a frequency corresponding to the base frequency as modified by the particular frequency adjustment value. Wireless communication signals are received at a wireless communication circuit. From the communication signals, a set of received wireless communication pulses are identified that have a pulse repetition frequency that corresponds to the adjusted clock signal. A distance ranging protocol is applied, using a processing circuit, to the identified set of received communication pulses.

Abstract translation: 使用时钟电路，以基频产生时钟信号。 频率调整电路基于频率偏移值，从多个频率调整值中选择特定的频率调整值。 提供经调整的时钟信号，其具有对应于由特定频率调整值修改的基本频率的频率。 在无线通信电路处接收无线通信信号。 从通信信号中，识别出具有对应于调整后的时钟信号的脉冲重复频率的一组接收到的无线通信脉冲。 使用处理电路将距离测距协议应用于所识别的一组接收到的通信脉冲。