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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：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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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：US08477879B2
公开(公告)日：2013-07-02
申请号：US12832674
申请日：2010-07-08
IPC分类号： H04L25/03
CPC分类号： H04L25/4904 , H04B5/0031 , H04B5/0037 , H04B5/0093 , H04L27/2338
摘要： One embodiment of the present invention includes a decoder system that decodes a bi-phase modulated signal to generate an output code. The system includes a first filter associated with a first logic state configured to generate a first dot product of a plurality of consecutive digital samples of the bi-phase modulated signal and a respective plurality of tap weights of the first filter. The system also includes a second filter associated with a second logic state configured to generate a second dot product of the plurality of consecutive digital samples of the bi-phase modulated signal with a respective plurality of tap weights of the second filter. The system further includes a comparator configured to compare the first and second dot products and to provide the output code as a bit having one of the first logic state and the second logic state based on the comparison.
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以产生输出码的解码器系统。 该系统包括与第一逻辑状态相关联的第一滤波器，其被配置为生成双相调制信号的多个连续数字样本的第一点积和第一滤波器的相应多个抽头权重。 该系统还包括与第二逻辑状态相关联的第二滤波器，其被配置为生成所述双相调制信号的所述多个连续数字样本的第二点积与所述第二滤波器的相应多个抽头权重。 该系统还包括比较器，其被配置为比较第一和第二点积，并且基于比较将输出代码提供为具有第一逻辑状态和第二逻辑状态之一的位。
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公开(公告)号：US20080284400A1
公开(公告)日：2008-11-20
申请号：US11967786
申请日：2007-12-31
IPC分类号： G05F1/00
CPC分类号： H02M3/157 , H02M2001/0012 , H02M2001/0025 , H02M2001/007 , H02M2003/1586
摘要： Methods and apparatus to monitor a digital power supply are disclosed. An example method includes receiving a voltage from a voltage source at a digital power supply, controlling the voltage using a power factor controller and a direct current (DC) to DC converter to generate an output voltage, controlling the output voltage using a signal processor to generate control signals based on receiving instructions, controlling the power factor controller and the DC to DC converter with a digital signal processor using the control signals, and copying an operating parameter from a register or a memory location of the digital signal processor to a memory buffer of the digital power supply.
摘要翻译： 公开了一种监视数字电源的方法和装置。 示例性方法包括从数字电源的电压源接收电压，使用功率因数控制器和直流（DC）到DC转换器来控制电压以产生输出电压，使用信号处理器来控制输出电压 基于接收指令生成控制信号，使用控制信号用数字信号处理器控制功率因数控制器和DC-DC转换器，以及将操作参数从数字信号处理器的寄存器或存储器位置复制到存储器缓冲器 的数字电源。
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9.发明申请METHODS AND APPARATUS TO HANDLE A REFERENCE VOLTAGE CHANGE IN A DIGITAL POWER SUPPLY 有权在数字电源中控制参考电压变化的方法和装置公开(公告)号：US20080284388A1
公开(公告)日：2008-11-20
申请号：US11967793
申请日：2007-12-31
IPC分类号： G05F1/10
CPC分类号： H02M3/157 , H02M2001/0012 , H02M2001/0025 , H02M2001/007 , H02M2003/1586
摘要： An example disclosed method to handle a reference voltage change in a digital power supply includes receiving a first value associated with a first reference voltage having a first voltage magnitude at a digital signal processor of a digital power supply, comparing the first reference voltage to an output voltage of the digital power supply, controlling the digital power supply based on the comparison between the first reference voltage and the output voltage, receiving a second value associated with a second reference voltage having a second voltage magnitude, determining that the first voltage magnitude is different than the second voltage magnitude, in response to determining that the second voltage magnitude is different than the first voltage magnitude, determining a voltage profile, and controlling the digital power supply based on the voltage profile.
摘要翻译： 用于处理数字电源中的参考电压变化的示例公开的方法包括：在数字电源的数字信号处理器处接收与具有第一电压幅度的第一参考电压相关联的第一值，将第一参考电压与输出 数字电源的电压，基于第一参考电压和输出电压之间的比较来控制数字电源，接收与具有第二电压幅度的第二参考电压相关联的第二值，确定第一电压幅度不同 响应于确定所述第二电压幅度不同于所述第一电压幅度，确定电压分布，以及基于所述电压分布来控制所述数字电源。
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公开(公告)号：US20080284401A1
公开(公告)日：2008-11-20
申请号：US11967798
申请日：2007-12-31
CPC分类号： H02M3/157 , H02M2001/0012 , H02M2001/0025 , H02M2001/007 , H02M2003/1586
摘要： Methods and apparatus to control a digital power supply are disclosed. An example method includes calculating a duty cycle of a pulse width modulated signal to control an output of a digital power supply, initializing an output of a counter that forms a pulse width modulator to increment by a first increment up to a counter maximum value for a first period and to decrement by the first increment for a second period, dividing the duty cycle by a constant to determine a multiple of the duty cycle to apply to each power stage of the power supply, calculating a first threshold percent by subtracting the multiple of the duty cycle from one hundred percent, setting a first threshold to be the first threshold percent multiplied by the counter maximum value, and controlling the power factor controller based on the first threshold.
摘要翻译： 公开了用于控制数字电源的方法和装置。 一个示例性方法包括计算脉宽调制信号的占空比以控制数字电源的输出，初始化形成脉宽调制器的计数器的输出，以递增第一增量直到一个最大值 第一周期，并且在第二周期中递减第一增量，将占空比除以常数以确定要施加到电源的每个功率级的占空比的倍数，通过减去第一阈值的倍数 占空比从百分之一百，将第一阈值设置为第一阈值乘以计数器最大值，以及基于第一阈值来控制功率因数控制器。
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