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1.发明授权
公开(公告)号：US6061388A
公开(公告)日：2000-05-09
申请号：US660382
申请日：1996-06-07
CPC分类号： H04B1/707
摘要： A method and apparatus for implementing a spread spectrum communication system of the "transmitted reference" type provides both multipath and interference protection with little complexity. Need for a local reference is avoided by transmitting a reference that the receiver can use to perform despreading. In general, the transmitted reference system sends both a message signal and a reference signal to the receiver. The message signal contains the information to be communicated, which has been spread through multiplication with a wide band "spreading waveform". The reference signal consists of the spreading waveform itself which the receiver call use to despread the message signal and recover the information.
摘要翻译： 用于实现“发送参考”类型的扩展频谱通信系统的方法和装置提供了几乎没有复杂性的多路径和干扰保护。 通过发送接收器可以用来执行解扩的参考来避免本地引用的需要。 通常，发送的参考系统向接收器发送消息信号和参考信号。 消息信号包含通过与宽带“扩展波形”相乘而扩展的要传送的信息。 参考信号由扩展波形本身组成，接收机呼叫用于解扩消息信号并恢复信息。
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公开(公告)号：US06754282B1
公开(公告)日：2004-06-22
申请号：US09460106
申请日：1999-12-13
IPC分类号： H04L2300
CPC分类号： H04L1/006 , H04L1/0041 , H04L25/03828 , H04L25/4906
摘要： A dc-free coding scheme that also provides channel gain employs a code that is based on an alphabet of two and comprises a list of N-dimensional vectors, where N is even, with a maximum run of two symbols. From this list, all vectors which begin or end in two identical symbols are eliminated. This avoids runs of longer than two consecutive symbols when vectors are concatenated. With this scheme, if the baseband transmission of a “+” is realized with positive voltage V and transmission of a “−” is realized with a negative voltage −V, then any concatenation of symbols is dc-free. Improved coding gain is realized by mapping modulated signals onto convolutional code trellises.
摘要翻译： 还提供信道增益的无直流编码方案采用基于两个字母表的代码，并且包括N维向量的列表，其中N是偶数，具有两个符号的最大运行。 从该列表中，消除了以两个相同符号开始或结束的所有向量。 当矢量被连接时，这避免了长于两个连续符号的运行。 利用该方案，如果利用正电压V实现“+”的基带传输，并且利用负电压-V实现“ - ”的传输，则符号的任何级联将是无直流的。 通过将调制信号映射到卷积码格来实现改进的编码增益。
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公开(公告)号：US5761238A
公开(公告)日：1998-06-02
申请号：US676013
申请日：1996-07-05
申请人： John Anderson Fergus Ross , Irfan Ali , John Erik Hershey , Stephen Michael Hladik , Gary Jude Saulnier , Michael Paul Weir
发明人： John Anderson Fergus Ross , Irfan Ali , John Erik Hershey , Stephen Michael Hladik , Gary Jude Saulnier , Michael Paul Weir
CPC分类号： H04B1/707
摘要： A low complexity and low cost transmitted reference spread spectrum communications system provides several methods of generating a suitable wideband carrier, a method for combining the wideband carrier with a narrowband modulated wideband carrier, and a number of implementations of a simple, inexpensive receiver for the transmitted reference communications system. The transmitter includes a balanced modulator for modulating a wideband spreading signal with a narrowband message signal to generate a wideband carrier. A signal combiner combines the wideband carrier with a narrowband modulated wideband carrier to generate a transmitted reference spread spectrum signal. The receiver includes a selectable time delay device having a plurality of taps for receiving a detected received signal from the transmitter. A tap selector selects a delayed signal from the selectable time delay device. A mixer combines output signals of the selectable time delay device and the tap selector, and a leaky integrator receives the mixer output signal and controls the tap selector. The leaky detector generates the narrowband message signal.
摘要翻译： 低复杂度和低成本传输的参考扩频通信系统提供了几种产生合适的宽带载波的方法，一种用于将宽带载波与窄带调制宽带载波组合的方法，以及用于传输的简单，便宜的接收机的多种实施方式 参考通信系统。 发射机包括用于利用窄带消息信号调制宽带扩频信号以产生宽带载波的平衡调制器。 信号组合器将宽带载波与窄带调制宽带载波组合以产生发射的参考扩展频谱信号。 接收机包括具有多个抽头的可选择的时间延迟装置，用于从发射机接收检测到的接收信号。 分接选择器选择来自可选时延装置的延迟信号。 混频器组合可选时延装置的输出信号和分接选择器，泄漏积分器接收混频器输出信号并控制分接选择器。 泄漏检测器产生窄带消息信号。
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公开(公告)号：US09130747B2
公开(公告)日：2015-09-08
申请号：US12336009
申请日：2008-12-16
CPC分类号： H04L5/143 , H04L5/1461
摘要： A full-duplex RF communication system and corresponding methods use digital adaptive filters for interference cancellation. As provided, the techniques allow full-duplex radio frequency communication without frequency-, time-, or code-division multiplexing and without the use of hardware RF cancellers. Such techniques may be useful for wireless communication, such as cellular communication, radio communication, broadcasting, short-range point-to-point communication, wireless sensor networks, and wireless computer networks.
摘要翻译： 全双工RF通信系统和相应的方法使用数字自适应滤波器进行干扰消除。 如所提供的，这些技术允许无频率，时间或码分复用的全双工射频通信，并且不使用硬件RF消除器。 这样的技术对于诸如蜂窝通信，无线电通信，广播，短距离点对点通信，无线传感器网络和无线计算机网络之类的无线通信可能是有用的。
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公开(公告)号：US08619533B1
公开(公告)日：2013-12-31
申请号：US13562522
申请日：2012-07-31
IPC分类号： G11B7/00
CPC分类号： G11B7/0065 , G11B7/00772
摘要： A method implemented using a data recording system is disclosed. The method includes receiving a micro-holographic data storage medium comprising a micro-hologram track having a first cross-sectional area. The method further includes recording a data in the micro-hologram track to form a data track in the micro-hologram track having a second cross-sectional area smaller than the first cross-sectional area.
摘要翻译： 公开了一种使用数据记录系统实现的方法。 该方法包括接收包含具有第一横截面积的微全息图轨道的微全息数据存储介质。 该方法还包括在微全息图轨迹中记录数据，以在具有小于第一横截面积的第二横截面积的微全息图轨迹中形成数据轨迹。
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公开(公告)号：US08453032B2
公开(公告)日：2013-05-28
申请号：US12764765
申请日：2010-04-21
IPC分类号： H03M13/00
CPC分类号： G11B20/1833 , G11B2020/10759 , G11B2020/10777 , G11B2020/183 , G11B2020/1843
摘要： Provided are methods and systems of selectively decoding optical data read from an optical storage medium based on a checksum algorithm technique. In one embodiment, optical data is converted into a data stream and buffered, and the checksum algorithm is applied to the data stream. If the calculated checksum matches an encoded checksum of the data stream, the data stream may be output without requiring further decoding. If the calculated checksum does not match the encoded checksum, the buffered data stream may be decoded to produce a corrected data stream, and the checksum algorithm may be applied to the corrected data stream. In some embodiments, the optical data may be re-read if the corrected data stream does not pass the checksum test, and the data stream obtained from the re-reading may be combined with the buffered data stream for further decoding.
摘要翻译： 提供了基于校验和算法技术来选择性地解码从光存储介质读取的光数据的方法和系统。 在一个实施例中，将光学数据转换为数据流并进行缓冲，并将校验和算法应用于数据流。 如果所计算的校验和与数据流的编码校验和匹配，则可以输出数据流而不需要进一步解码。 如果所计算的校验和与编码的校验和不匹配，则缓冲的数据流可以被解码以产生校正的数据流，并且校验和算法可以应用于校正的数据流。 在一些实施例中，如果校正的数据流未通过校验和测试，则可以重新读取光学数据，并且可以将从重新读取获得的数据流与缓冲的数据流组合以进一步解码。
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公开(公告)号：US08345526B2
公开(公告)日：2013-01-01
申请号：US12981279
申请日：2010-12-29
申请人： John Erik Hershey , Kenneth Brakeley Welles , John Anderson Fergus Ross , Xiaolei Shi , Zhiyuan Ren , Victor Petrovich Ostroverkhov
发明人： John Erik Hershey , Kenneth Brakeley Welles , John Anderson Fergus Ross , Xiaolei Shi , Zhiyuan Ren , Victor Petrovich Ostroverkhov
IPC分类号： G11B7/00
CPC分类号： G11B7/00772 , G11B7/24088 , G11B2007/00656
摘要： Techniques are provided for increasing storage capacity in a holographic storage system. While typical holographic storage systems involve binary storage for each data position in a holographic disk, present techniques involve storing data such that more than two data levels may be recorded in each data position. In some embodiments, a recording beam directed to the disk may be adjusted to different power levels depending on the data level to be recorded. Furthermore, the recording time at a data position may be adjusted to increase the energy directed to the data position by increasing the amount of time the recording beam is impinged on the data position. Embodiments are suitable for different types of holographic storage, including dye-based medium.
摘要翻译： 提供了用于增加全息存储系统中的存储容量的技术。 虽然典型的全息存储系统涉及用于全息盘中的每个数据位置的二进制存储，但是现有技术涉及存储数据，使得可以在每个数据位置记录两个以上的数据级别。 在一些实施例中，根据待记录的数据级别，可以将指向磁盘的记录光束调整到不同的功率电平。 此外，可以调整数据位置处的记录时间，以通过增加记录光束撞击在数据位置上的时间量来增加指向数据位置的能量。 实施例适用于不同类型的全息存储，包括基于染料的介质。
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8.发明授权System and method for storage of data in circular data tracks on optical discs 有权用于在光盘上的圆形数据轨道中存储数据的系统和方法公开(公告)号：US08331210B2
公开(公告)日：2012-12-11
申请号：US12342794
申请日：2008-12-23
申请人： John Anderson Fergus Ross , Kenneth Brakeley Welles , John Erik Hershey , Nick Andrew Van Stralen , Victor Petrovich Ostroverkhov
发明人： John Anderson Fergus Ross , Kenneth Brakeley Welles , John Erik Hershey , Nick Andrew Van Stralen , Victor Petrovich Ostroverkhov
IPC分类号： G11B7/00
CPC分类号： G11B7/005 , G11B20/10009 , G11B20/10287 , G11B20/10296 , G11B20/1803 , G11B20/1833 , G11B2020/183 , G11B2220/2537
摘要： The present techniques provide methods and systems for reading and processing a data signal read from an optical data disc. In embodiments, an optical reader system may read data bits from a data ring in the disc. The data rings may be concentric, and a beginning of a sequence of data on the data ring may be in substantially the same position as an ending of the sequence. The reader may identify a data ring and begin the read process on the targeted data ring, and may end the read process when the reader reaches the starting point. The data sequence read from the data ring may be decoded to form a bit stream, which may be provided to various output devices. A circular trellis formed from the bit stream may enable the reading of a targeted data sequence without additional tail bits to improve data transmission efficiency.
摘要翻译： 本技术提供了用于读取和处理从光学数据盘读取的数据信号的方法和系统。 在实施例中，光学读取器系统可以从盘中的数据环读取数据位。 数据环可以是同心的，并且数据环上的数据序列的开始可以与序列的结尾基本上在相同的位置。 读取器可以识别数据环并且在目标数据环上开始读取过程，并且当读取器到达起始点时可以结束读取过程。 可以对从数据环读取的数据序列进行解码以形成可被提供给各种输出设备的比特流。 从比特流形成的圆形网格可以使得能够读取目标数据序列而不需要额外的尾比特来提高数据传输效率。
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公开(公告)号：US08233368B2
公开(公告)日：2012-07-31
申请号：US12338828
申请日：2008-12-18
申请人： John Anderson Fergus Ross , Kenneth Brakeley Welles , John Erik Hershey , Xiaolei Shi , Victor Petrovich Ostroverkhov
发明人： John Anderson Fergus Ross , Kenneth Brakeley Welles , John Erik Hershey , Xiaolei Shi , Victor Petrovich Ostroverkhov
IPC分类号： G11B7/00
CPC分类号： G11B7/0065 , G11B7/131
摘要： The present techniques provide methods and systems for more reliable reading of optical data disks. In embodiments, a multi-pixel detector that is segmented into multiple areas, or detector segments, may be used to detect a pattern in the light reflected from an optical data disk. The pattern may include light scattered from a single bit that may be under a center detector, as well as light scattered from proximate bits. The detector system may then combine the quantized values from each of the detector segments mathematically to determine the presence or absence of a bit or bits of data. The mathematical combination may also use data that is known about the status of adjacent data bits (such as previously read bits, or bit patterns which are allowed or not allowed by specific data encoding schemes) to improve the accuracy of the bit prediction.
摘要翻译： 本技术提供了用于更可靠地读取光学数据盘的方法和系统。 在实施例中，分割成多个区域或检测器段的多像素检测器可用于检测从光学数据盘反射的光中的图案。 图案可以包括从可能在中心检测器下方的单个位散射的光以及从近似位散射的光。 然后，检测器系统可以在数学上组合来自每个检测器段的量化值以确定数据的位或位的存在或不存在。 数学组合还可以使用已知关于相邻数据位（例如先前读取的位或被特定数据编码方案允许或不允许的位模式）的状态来提高比特预测的精度的数据。
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公开(公告)号：US20120026855A1
公开(公告)日：2012-02-02
申请号：US12846085
申请日：2010-07-29
IPC分类号： G11B7/00
CPC分类号： G11B7/0065
摘要： A method for processing information is provided. The method includes directing a laser beam to a first track of a first layer of a holographic storage medium. The method also includes recording a base voltage based on a look-up table. The method includes directing the laser beam to a target track in the first layer, based on position information in tracks. Further, the method includes recording an offset voltage for the target track into the look-up table. Still further, the method includes directing the laser beam to a target layer based on position information in vertical wobbles. The method also includes recording an offset voltage for the target layer into the look-up table. Finally, the method includes determining a final voltage based on the look-up table and applying the final voltage to an actuator for moving the laser beam to a final target position in the holographic storage medium for recording and retrieval of information.
摘要翻译： 提供了一种处理信息的方法。 该方法包括将激光束引导到全息存储介质的第一层的第一轨道。 该方法还包括基于查找表记录基本电压。 该方法包括基于轨道中的位置信息将激光束引导到第一层中的目标轨道。 此外，该方法包括将目标轨迹的偏移电压记录到查找表中。 此外，该方法包括基于垂直摆动中的位置信息将激光束引导到目标层。 该方法还包括将目标层的偏移电压记录到查找表中。 最后，该方法包括基于查找表确定最终电压，并将最终电压施加到用于将激光束移动到全息存储介质中的最终目标位置的致动器，用于记录和检索信息。
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