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公开(公告)号：US06915080B2
公开(公告)日：2005-07-05
申请号：US09940763
申请日：2001-08-27
CPC分类号： G02B6/3512 , B81B3/0062 , G02B6/359 , H04B10/1121 , H04B10/1123 , H04B10/1125 , H04B10/1141
摘要： Optical wireless links automatically align themselves using feedback information that is transmitted over the light beams being aligned. Each link performs an acquisition routine in which its light beam is swept through a pre-defined pattern while transmitting its beam alignment information. When a link receives beam alignment information from a remote link, it updates its transmission to include the alignment information received from the remote link. At some point during the acquisition routine, the remote link will receive its own alignment information “echoed back” from the first link and will re-align its beam accordingly. At some point, each link will have received its own alignment information echoed back from the other link and will have aligned itself to that position. Data communication can begin at that point, or a more refined alignment step can then be performed. The alignment information can be based upon position, sample number, or time transmitted.
摘要翻译： 光无线链路使用在对准的光束上传输的反馈信息自动对准自身。 每个链路执行采集程序，其中其光束被扫描通过预定义的模式，同时传输其光束对准信息。 当链路从远程链路接收波束对准信息时，其更新其传输以包括从远程链路接收的对准信息。 在采集程序的某个时刻，远程链路将从第一个链路接收到自己的对准信息“回波”，并相应地重新对准其波束。 在某些时候，每个链接都会收到自己的对齐信息，从另一个链接回传，并将自己的位置。 数据通信可以从那时开始，或者可以执行更精细的对准步骤。 对齐信息可以基于位置，样本号或发送的时间。
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公开(公告)号：US20110158329A1
公开(公告)日：2011-06-30
申请号：US13044930
申请日：2011-03-10
CPC分类号： H04L27/22 , H04B5/0037 , H04L27/2338 , H04L2027/003 , H04L2027/0046 , H04L2027/0069
摘要： One embodiment of the present invention includes a decoder system that decodes a bi-phase modulated signal. The system includes a buffer configured to store a first plurality of digital samples associated with a first bit of the bi-phase modulated signal and a second plurality of digital samples associated with a second bit of the bi-phase modulated signal. The first bit can immediately precede the second bit. The system also includes a first summer configured to add the first plurality of digital samples to generate a first sum and a second summer configured to add the second plurality of digital samples to generate a second sum. The system further includes a comparator configured to compare the first sum and the second sum to determine an edge-transition between the first bit and the second bit, and to determine a logic-state of the first bit based on the edge-transition.
摘要翻译： 本发明的一个实施例包括对双相调制信号进行解码的解码器系统。 该系统包括被配置为存储与双相调制信号的第一比特相关联的第一多个数字样本和与该双相调制信号的第二比特相关联的第二多个数字样本的缓冲器。 第一位可以立即在第二位之前。 该系统还包括第一加法器，其被配置为添加第一多个数字样本以产生第一和，并且配置为添加第二多个数字样本以生成第二和。 该系统还包括比较器，其被配置为比较第一和和第二和以确定第一位和第二位之间的边沿转换，并且基于边沿转换来确定第一位的逻辑状态。
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公开(公告)号：US08130129B2
公开(公告)日：2012-03-06
申请号：US12777734
申请日：2010-05-11
IPC分类号： H03M1/12
CPC分类号： H03M1/20 , H03M1/1225
摘要： One embodiment of the present invention includes an analog-to-digital converter (ADC) system. The system includes an ADC configured to generate digital samples that are digital versions of at least one analog signal at a sampling frequency and a memory configured to store data corresponding to an average value of the digital samples in at least one register. The system further includes a processor configured to access the data corresponding to the average value for processing at an access frequency that is less than the sampling frequency.
摘要翻译： 本发明的一个实施例包括模数转换器（ADC）系统。 该系统包括被配置为生成以采样频率为至少一个模拟信号的数字版本的数字样本的数字样本，和被配置为存储与至少一个寄存器中的数字样本的平均值相对应的数据的存储器。 该系统还包括处理器，被配置为访问对应于平均值的数据，以便在小于采样频率的存取频率下进行处理。
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公开(公告)号：US07133617B2
公开(公告)日：2006-11-07
申请号：US10056688
申请日：2002-01-24
IPC分类号： H04B10/00
CPC分类号： H04B10/11 , H04B10/1123 , H04B10/1125
摘要： In an optical wireless network, where light beams are transmitted over-the-air, reflections of the transmitted light beams may cause a receiver of an optical wireless device to detect and subsequently lock onto the signal that it transmitted. By doing so, the network is effectively broken. A method and apparatus to detect the reception of reflected signals using minimal additional hardware and data is presented. Should a reflected signal be detected, the receiver is prevented from locking onto the signal, allowing the receiver to detect and subsequently lock onto light beams originating from other optical wireless devices.
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公开(公告)号：US20110279297A1
公开(公告)日：2011-11-17
申请号：US12777734
申请日：2010-05-11
IPC分类号： H03M1/12
CPC分类号： H03M1/20 , H03M1/1225
摘要： One embodiment of the present invention includes an analog-to-digital converter (ADC) system. The system includes an ADC configured to generate digital samples that are digital versions of at least one analog signal at a sampling frequency and a memory configured to store data corresponding to an average value of the digital samples in at least one register. The system further includes a processor configured to access the data corresponding to the average value for processing at an access frequency that is less than the sampling frequency.
摘要翻译： 本发明的一个实施例包括模数转换器（ADC）系统。 该系统包括被配置为生成以采样频率为至少一个模拟信号的数字版本的数字样本的数字样本，和被配置为存储与至少一个寄存器中的数字样本的平均值相对应的数据的存储器。 该系统还包括处理器，被配置为访问对应于平均值的数据，以便在小于采样频率的存取频率下进行处理。
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公开(公告)号：US07389052B2
公开(公告)日：2008-06-17
申请号：US10060549
申请日：2002-01-30
CPC分类号： H04B10/1123
摘要： In optical wireless networks, light beams are transmitted over-the-air and maximum performance is achieved when light beams are aligned with corresponding light detectors. A feedback control system is created between transmitting and receiving units, wherein the receiving unit provides positional data about the light beam from the transmitting unit. The transmitting unit uses the data provided to make adjustments to its light beam. However, in order to use the positional data, the units must be operating with a common coordinate basis. A method is provided for determining the basis and generating the transformation needed to modify positional data from one unit into information that is useful for the other unit. Additionally, a method is presented for using the positional data to maintain proper alignment of the light beam.
摘要翻译： 在光无线网络中，光束通过空中传输，并且当光束与对应的光检测器对准时获得最大的性能。 在发射和接收单元之间创建反馈控制系统，其中接收单元提供关于来自发射单元的光束的位置数据。 发送单元使用提供的数据来调整其光束。 然而，为了使用位置数据，单位必须以共同的坐标为基础进行操作。 提供了一种用于确定基础并产生将位置数据从一个单元修改为对其他单元有用的信息所需的变换的方法。 另外，提出了使用位置数据来保持光束的适当对准的方法。
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7.发明授权公开(公告)号：US06744034B2
公开(公告)日：2004-06-01
申请号：US10060936
申请日：2002-01-30
IPC分类号： G01J132
CPC分类号： G02B26/02
摘要： Micro-electromechanical apparatus and method with position sensor compensation to compensate for sensor drift. A preferred embodiment comprises modifying the intensity of a light source used in position detection to maintain a constant sum of the voltages output from photodetectors receiving light from the light source. Preferred embodiments may be implemented in digital signal processor code, or external to the processor in analog circuitry. By adjusting light source intensity, position calculations may be performed without normalization, and thus without a time-consuming division operation.
摘要翻译： 具有位置传感器补偿的微机电装置和方法来补偿传感器漂移。 优选实施例包括修改位置检测中使用的光源的强度，以维持从光源接收光的光电检测器输出的电压的恒定和。 优选实施例可以在数字信号处理器代码中实现，或者在模拟电路中实现处理器外部。 通过调整光源强度，可以在没有标准化的情况下执行位置计算，因此不需要耗时的分割操作。
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8.发明授权Method and apparatus for optimizing the data transfer rate to and from a plurality of disk surfaces 失效用于优化到多个盘表面的数据传送速率的方法和装置
公开(公告)号：US6105104A
公开(公告)日：2000-08-15
申请号：US953810
申请日：1997-10-20
申请人： James Edward Guttmann , Mark David Heminger , Michael Scott Hicken , Steven M. Howe , Timothy Swatosh
发明人： James Edward Guttmann , Mark David Heminger , Michael Scott Hicken , Steven M. Howe , Timothy Swatosh
CPC分类号： G11B27/3027 , G11B20/1217 , G11B27/329 , G11B27/36 , G11B2020/10916
摘要： A method of mapping sequential logical data blocks to multiple disk surfaces. Data blocks are written to a predetermined number of adjacent tracks on each surface before performing a head switch to write data on another surface. The predetermined number of tracks are written on each surface in turn before performing a seek and head switch to continue writing on another predetermined number of tracks on each surface. After each head switch to continue writing from the radial position reached when writing the previous group of tracks, the direction of track incrementing or decrementing reverses so that the actuator moves back and forth in a "serpentine" manner.
摘要翻译： 将顺序逻辑数据块映射到多个磁盘表面的方法。 在执行头切换以在另一表面上写入数据之前，将数据块写入每个表面上的预定数量的相邻轨道。 在执行搜索和头开关以在每个表面上的另一预定数量的轨道上继续写入之前，预定数量的磁道依次写在每个表面上。 在每个磁头开关从写入前一组磁道所达到的径向位置继续写入时，磁道的增加或减小方向反转，使得致动器以“蛇形”的方式来回移动。
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公开(公告)号：US06549155B1
公开(公告)日：2003-04-15
申请号：US10060856
申请日：2002-01-30
IPC分类号： H03M166
CPC分类号： H03M1/68 , H03M1/0631 , H03M1/0863
摘要： Signal conversion apparatus and method with coarse and fine digital to analog converters. The output of the coarse DAC has a high gain to support wide voltage swings, while the fine DAC has a low gain to support accurate tracking control. The two outputs are combined in an analog summing junction. The apparatus and method may comprise a low pass filter connected to the coarse DAC output. The filter may be switched off during large changes to provide rapid system response, and switched on during position holding to attenuate noise from the coarse DAC. The apparatus and method may comprise a pre-charging capacitor in the filter, wherein the capacitor may be pre-charged when the filter is off, reducing the switch transient when the filter is switched on.
摘要翻译： 信号转换装置和方法，具有粗略和精细的数模转换器。 粗DAC的输出具有高增益以支持宽电压摆幅，而精细DAC具有低增益以支持精确的跟踪控制。 两个输出在模拟加法结中组合。 该装置和方法可以包括连接到粗DAC输出的低通滤波器。 在大的变化期间，滤波器可以被关闭以提供快速的系统响应，并且在位置保持期间接通以衰减来自粗略DAC的噪声。 该装置和方法可以包括滤波器中的预充电电容器，其中当滤波器关闭时，电容器可以被预充电，当滤波器接通时减小开关瞬态。
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