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    • 7. 发明授权
    • Verified distance ranging
    • 验证距离范围
    • US08552903B2
    • 2013-10-08
    • US11735867
    • 2007-04-16
    • David Jonathan JulianAmal EkbalChong U. Lee
    • David Jonathan JulianAmal EkbalChong U. Lee
    • G01S13/74G01S13/08
    • G01S13/765G01S13/0209G01S13/284H04W64/00
    • Various techniques are described relating to verifying a distance between devices. A distance between two devices may be verified by requiring one of the devices to take one or more actions that generate a result that is only possible if the device is at most a given distance from the other device. In some aspects verified ranging is accomplished through the use of a ranging signal and a responsive signal. In some aspects the ranging signal may comprise a random, pseudorandom, or deterministic sequence. A responding device may operate on a ranging signal in accordance with a known function to generate a responsive signal. A ranging device also may perform operations to determine the likelihood that a responding device properly operated on a ranging signal that the ranging device transmitted to the responding device.
    • 描述了关于验证设备之间的距离的各种技术。 两个设备之间的距离可以通过要求设备中的一个进行一个或多个动作来验证,该动作只有在设备距离其他设备至多一定距离时才可能产生。 在一些方面,验证的测距通过使用测距信号和响应信号来实现。 在一些方面,测距信号可以包括随机,伪随机或确定性序列。 响应设备可以根据已知功能在测距信号上操作以产生响应信号。 测距设备还可以执行操作以确定响应设备在测距设备正确地操作测距设备发射到响应设备的可能性。
    • 10. 发明申请
    • DELAY LINE CALIBRATION
    • 延迟线校准
    • US20110080203A1
    • 2011-04-07
    • US12967216
    • 2010-12-14
    • Chong U. LeeDavid Jonathan JulianAmal Ekbal
    • Chong U. LeeDavid Jonathan JulianAmal Ekbal
    • H03H11/26
    • H03K5/131H03K2005/00104H03K2005/00156
    • A tunable delay line is calibrated to maintain the delay of the delay line at a desired value or within a desired range of values. In some aspects a signal is passed through a delay line multiple times so that the cumulative delay of the signal through the delay line (e.g., as indicated by a count) may be calculated over a period of time. The count is compared with an expected count and, based on this comparison, the delay of the delay line is adjusted as necessary. In some aspects the signal may comprise a digital signal. In some aspects a delay through a delay line may be calculated based on analysis of amplitude changes in a signal caused by a phase shift imparted on the signal by the delay line. In some aspects a delay line is incorporated into a transmitted reference system to generate and/or process transmitted reference signals.
    • 校准可调延迟线以将延迟线的延迟保持在期望值或期望的值范围内。 在一些方面,信号通过延迟线多次,使得通过延迟线的信号的累积延迟(例如,由计数指示)可以在一段时间内被计算。 将计数与期望计数进行比较,并根据该比较,根据需要调整延迟线的延迟。 在一些方面,信号可以包括数字信号。 在一些方面,通过延迟线的延迟可以基于由由延迟线对信号施加的相移引起的信号中的幅度变化的分析来计算。 在一些方面,将延迟线并入到传输的参考系中以产生和/或处理传输的参考信号。