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    • 4. 发明授权
    • Efficient encoding and detection method and device for binary intensity
modulated optical data signals
    • 用于二进制强度调制光数据信号的高效编码和检测方法及装置
    • US6118567A
    • 2000-09-12
    • US940905
    • 1997-09-30
    • Rachid M. AlamehBruce C. EastmondThomas J. Walczak
    • Rachid M. AlamehBruce C. EastmondThomas J. Walczak
    • H04L25/49H04L27/06H04B10/06H04B1/10H04B10/00
    • H04L25/4902H04L27/06
    • A waveform encoding method and device provide for generating/receiving a power efficient binary intensity modulated optical data signal from a binary source signal which minimizes a time between adjacent pulse transitions and maximizes a pulse peak amplitude for transmission over a low-power wireless infrared link. In generating the signal, the method includes: generating a Q-ary pulse position modulation, Q-PPM, encoded data signal from binary data where Q represents 2.sup.L time slots and L is a predetermined integer representing a predetermined number of binary source bits of the power efficient binary intensity modulated optical data signal; generating an efficient binary intensity modulated signal by increasing the pulse peak amplitude of the Q-PPM encoded data signal by a factor of k, k a predetermined value, and decreasing a pulse width of the Q-PPM encoded data signal by k; and transmitting the efficient binary intensity modulated signal over the low-power wireless infrared link.
    • 波形编码方法和装置提供从二进制源信号产生/接收功率有效的二进制强度调制的光数据信号,其使相邻脉冲转变之间的时间最小化并且最大化用于在低功率无线红外线链路上传输的脉冲峰值幅度。 在产生该信号时,该方法包括:从二进制数据产生Q-ary脉冲位置调制Q-PPM,其中Q表示2L时隙,L是表示预定数量的二进制源位的预定整数 功率有效的二进制强度调制光数据信号; 通过将Q-PPM编码数据信号的脉冲峰值幅度增加k个k个预定值,并且将Q-PPM编码数据信号的脉冲宽度减小k来产生有效的二进制强度调制信号; 并通过低功率无线红外线链路传输有效的二进制强度调制信号。
    • 7. 发明授权
    • Method and apparatus for detecting binary encoded data
    • 用于检测二进制编码数据的方法和装置
    • US5490175A
    • 1996-02-06
    • US42910
    • 1993-04-05
    • Rachid M. AlamehBruce C. Eastmond
    • Rachid M. AlamehBruce C. Eastmond
    • H04L25/06
    • H04L25/068
    • Binary encoded data may be detected in a stream of data, by first detecting data transitions. From the detected data transitions, a first pulse is generated when successive data transitions are detected within a predetermined period of time and a second pulse is generated when successive data transitions are not detected within the predetermined period of time. The first and second pulses have the same duration but the amplitude of the first pulses is half of the amplitude of the second pulses. The first and second pulses are filtered by a bandpass filter and compared with a predetermined threshold. When the filtered pulses are above the predetermined threshold, the received stream of data is binary encoded data. When the filtered pulses are below the predetermined threshold, the received stream of data is not binary encoded data.
    • 可以通过首先检测数据转换来在数据流中检测二进制编码数据。 从检测到的数据转换中,当在预定时间段内检测到连续数据转换时产生第一脉冲,并且在预定时间段内没有检测到连续数据转换时产生第二脉冲。 第一和第二脉冲具有相同的持续时间,但是第一脉冲的幅度是第二脉冲幅度的一半。 第一和第二脉冲被带通滤波器滤波并与预定阈值进行比较。 当滤波的脉冲高于预定阈值时,所接收的数据流是二进制编码数据。 当滤波的脉冲低于预定阈值时,所接收的数据流不是二进制编码数据。
    • 9. 发明申请
    • WEARABLE DEVICE WITH ACOUSTIC USER INPUT AND METHOD FOR SAME
    • 具有声音用户输入的可擦除装置及其方法
    • US20140064037A1
    • 2014-03-06
    • US13597643
    • 2012-08-29
    • Rachid M. AlamehPaul R. SteuerRobert A. Zurek
    • Rachid M. AlamehPaul R. SteuerRobert A. Zurek
    • G10K11/00
    • G04G21/08G01H13/00
    • An electronic device (100) includes a component portion (101) and a strap (102). The strap defines an air chamber (402) therein having a corresponding volume. A driver (403) is disposed in the component portion at a first port (404) between the component portion and the strap. A frequency detector (405) is disposed in the component portion at a second port (406) between the component portion and the strap. A control circuit (407) is operable with the driver and the frequency detector and is configured to determine a peak of a resonant frequency over a frequency range in the air chamber with the frequency detector that are a function of the corresponding volume and are responsive to signals produced by the driver, correlate the frequency of pressure variations determined with a user input, and perform an operation based upon the user input.
    • 电子设备(100)包括组件部分(101)和带(102)。 所述带限定了其中具有相应体积的空气室(402)。 驱动器(403)在部件部分和带之间的第一端口(404)处设置在部件部分中。 频率检测器(405)在组件部分和带之间的第二端口(406)处设置在组件部分中。 控制电路(407)可与驱动器和频率检测器一起操作,并且被配置为通过频率检测器确定在空气室中的频率范围内的谐振频率的峰值,该频率范围是相应体积的函数,并且响应于 由驾驶员产生的信号使用用户输入确定的压力变化的频率相关联,并且基于用户输入执行操作。