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9 条记录 (耗时 0.019 秒)

    Thermopneumatic support device
    1.
    发明授权
    Thermopneumatic support device 失效
    热气动支撑装置

    公开(公告)号：US4023756A

    公开(公告)日：1977-05-17

    申请号：US621791

    申请日：1975-10-14

    申请人： Thomas W. Baker

    发明人： Thomas W. Baker

    IPC分类号： F16L3/217 ,  F16L3/20

    CPC分类号： F16L3/217 ,  Y10S248/901

    摘要： A thermopneumatic support device for providing support over a range of positions for objects, such as high temperature steam piping, subject to temperature changes and thus to changes in position resulting from thermal expansion or contraction. The device utilizes the heat energy of the object being supported in order to provide the necessary power to move the object over a range of positions. The heat energy from the object being supported provides the power for moving the thermopneumatic support in direct proportion to the expansion or contraction resulting from the variation in temperature of the object being supported. The device comprises pneumatic actuating means comprising a sealed chamber containing a fixed mass of a compressible fluid which is in thermal contact with the object being supported. Pressure changes in the enclosed compressible fluid results in direct proportion to pressure changes of the fluid which in turn causes movement of the support means in response to temperature changes in the object being supported. There are coupling and linking means provided between the support means and the pipe and the support means and a stationary support respectively.

    摘要翻译： 一种热气动支撑装置，用于在诸如高温蒸汽管道的物体的一系列位置上提供支撑，受到温度变化的影响，从而由热膨胀或收缩引起的位置变化。 该装置利用被支撑物体的热能，以提供在一定范围的位置上移动物体所需的动力。 来自被支撑物体的热能提供了用于使热气体支撑件与由被支撑物体的温度变化导致的膨胀或收缩成正比的动力。 该装置包括气动致动装置，该气动致动装置包括密封室，该密封室包含与被支撑物体热接触的可压缩流体的固定质量。 封闭的可压缩流体中的压力变化导致与流体的压力变化成正比，这又导致支撑装置响应于所支撑物体中的温度变化而移动。 在支撑装置和管与支撑装置和固定支架之间分别设有联接和连接装置。

    Soft decision Viterbi decoding with large constraint lengths
    2.
    发明授权
    Soft decision Viterbi decoding with large constraint lengths 失效
    软判决维特比解码具有较大的约束长度

    公开(公告)号：US5802116A

    公开(公告)日：1998-09-01

    申请号：US628072

    申请日：1996-04-04

    申请人： Thomas W. Baker ,  Mohammed S. Mobin

    发明人： Thomas W. Baker ,  Mohammed S. Mobin

    IPC分类号： G06F11/10 ,  H03M13/23 ,  H03M13/41 ,  H03M13/45 ,  H03M13/12

    CPC分类号： H03M13/4153

    摘要： A method and apparatus for obtaining a soft symbol decoded output of a received signal by a two pass Viterbi operation. The technique is especially advantageous where the signal is convolutionally encoded with large constraint lengths. During the first pass, the error-correction co-processor (ECCP) is programmed for hard decoded output alone. After all the received symbol sets are hard-bit decoded, a second pass Viterbi operation is performed. Using the previously decoded hard bit to identify the most likely next state at an initial time instant, and initializing the present states at that initial time instant with pre-saved accumulated costs from the first pass Viterbi operation, branch metrics are computed for those state transitions leading to the most likely next state at that time instant. The accumulated cost values of the present states leading to the most likely next state are updated, and the absolute value of their difference is coded as a reliability of the hard decoded output corresponding to that time instant. The combination of the hard decoded output and the reliability obtained from the second pass Viterbi operation results in a soft symbol decoded output. At this point, the symbol set received at this time instant during the first pass Viterbi operation is reloaded into the ECCP which updates the accumulated cost values of all possible next states. These steps are repeated until all desired soft symbols are obtained.

    摘要翻译： 一种通过双程维特比操作获得接收信号的软符号解码输出的方法和装置。 该技术在信号以大约束长度进行卷积编码的情况下特别有利。 在第一次通过期间，纠错协处理器（ECCP）被编程为仅用于硬解码输出。 在所有接收到的符号集被硬比特解码之后，执行第二遍维特比（第二遍）维特比（Viterbi）操作。 使用先前解码的硬比特来识别初始时刻的最可能的下一状态，并且在该初始时刻利用来自第一遍Viterbi操作的预先存储的累积成本初始化当前状态，为这些状态转换计算分支度量 导致当时最可能的下一个状态。 导致导致最可能的下一状态的当前状态的累计成本值被更新，并且它们的差的绝对值被编码为对应于该时刻的硬解码输出的可靠性。 硬解码输出和从第二遍维特比操作获得的可靠性的组合导致软符号解码输出。 此时，在第一遍维特比操作期间在此时刻接收到的符号集被重新加载到ECCP中，ECCP更新所有可能的下一状态的累积成本值。 重复这些步骤，直到获得所有期望的软符号。

    Device for generating multiple spreading sequences in reverse high speed data channels
    5.
    发明授权
    Device for generating multiple spreading sequences in reverse high speed data channels 失效
    用于在反向高速数据信道中产生多个扩频序列的装置

    公开(公告)号：US06266331B1

    公开(公告)日：2001-07-24

    申请号：US09108429

    申请日：1998-07-01

    申请人： Thomas W. Baker ,  Richard A. Cesari ,  Xiao-An Wang

    发明人： Thomas W. Baker ,  Richard A. Cesari ,  Xiao-An Wang

    IPC分类号： H04B7216

    CPC分类号： H04J13/10 ,  H04B1/707

    摘要： The present invention discloses a device for generating multiple spreading sequences efficiently. In a preferred embodiment, the eight different spreading sequences are generated in parallel. In this embodiment, the spreading sequence generator comprises a master sequence generator and eight secondary sequence generators. The spreading sequence generator also comprises eight different modulo-2 adders which are used for generating parity check sum outputs. The master sequence generator is responsible for creating a master output from the first subgroup. The secondary sequence generators create eight different secondary outputs. Each of the secondary outputs is combined with the master output through one of the eight modulo-2 adders to create eight different spreading sequences. In an alternative embodiment, the principles of the present invention may be used to generate such spreading sequences in a sequential manner. Both embodiments provide efficiency and power savings over the prior art method and apparatus.

    摘要翻译： 本发明公开了一种有效产生多个扩展序列的装置。在一个优选实施例中，八个不同的扩频序列是并行产生的。 在该实施例中，扩展序列发生器包括主序列发生器和八个二次序发生器。 扩展序列发生器还包括八个不同的模2加法器，用于产生奇偶校验和输出。主序列发生器负责从第一子组创建主输出。 二次序发生器产生八个不同的二次输出。 每个次级输出通过八个模2加法器之一与主输出组合，以产生八个不同的扩展序列。在替代实施例中，本发明的原理可以用于按顺序生成这样的扩展序列 。 两个实施例相对于现有技术的方法和装置提供效率和功率节省。

    Theft alarm in mobile device
    8.
    发明授权
    Theft alarm in mobile device 有权
    手机中的盗窃警报

    公开(公告)号：US06696941B2

    公开(公告)日：2004-02-24

    申请号：US09944367

    申请日：2001-09-04

    申请人： Thomas W. Baker

    发明人： Thomas W. Baker

    IPC分类号： G08B108

    CPC分类号： G08B13/1418 ,  G08B25/08

    摘要： A system and method for remotely triggering an audible alarm within a mobile phone is disclosed. A remote user calls the mobile phone and enters a personal identification number (PIN) attached to a remote calling device. The PIN is processed either within the mobile phone or within a central service. The PIN is compared to a pre-stored PIN. A match between the previously stored PIN and the PIN entered by the user produces a signal that triggers an audible alarm within mobile phone to deter theft and assist in recovery of a stolen mobile phone.

    摘要翻译： 公开了一种用于在移动电话内远程触发声音报警的系统和方法。 远程用户呼叫移动电话并输入附加到远程呼叫设备的个人识别码（PIN）。 PIN在移动电话内或在中央服务中进行处理。 PIN与预先存储的PIN进行比较。 先前存储的PIN和用户输入的PIN之间的匹配产生触发在手机内发出声音报警的信号，以阻止盗窃并协助恢复被盗手机。

    Signal decoding for either Manhattan or Hamming metric based Viterbi decoders
    9.
    发明授权
    Signal decoding for either Manhattan or Hamming metric based Viterbi decoders 失效
    基于曼哈顿或汉明度量的维特比解码器的信号解码

    公开(公告)号：US6041086A

    公开(公告)日：2000-03-21

    申请号：US628073

    申请日：1996-04-04

    申请人： Thomas W. Baker ,  Mohammed S. Mobin

    发明人： Thomas W. Baker ,  Mohammed S. Mobin

    IPC分类号： G06F11/10 ,  H03M13/23 ,  H03M13/41 ,  H04L1/00 ,  H04L27/06

    CPC分类号： H03M13/6516 ,  H03M13/41 ,  H04L1/0054

    摘要： A method and apparatus is presented for establishing an equivalence between the Hamming branch metric scheme and the Manhattan branch metric scheme. A signal format converter is presented to convert input signal in a first number system such as binary or two's complement, into a second number system. The signal format converter implemented at the input to a Viterbi decoder allows the use of a Viterbi decoder designed for a Manhattan metric sceme in an application where the signals are represented in two's complement. Similarly a Viterbi decoder designed for a Hamming metric scheme can be implemented in an application where the signals are represented in unsigned binary. The signal format converter can be used with both a hard decision Viterbi decoder and a soft decision Viterbi decoder. Where a soft decision Viterbi decoder is used the soft symbol of a Manhattan metric scheme based Viterbi decoder can be converted to an equivalent Hamming soft symbol by taking the two's complement of the absolute value of the accumulated cost difference. Where the Viterbi decoder is based on a Hamming metric scheme, an equivalent Manhattan soft symbol can be obtained by taking the absolute value of the soft symbol decoded output.

    摘要翻译： 提出了一种用于建立Hamming分支度量方案和Manhattan分支度量方案之间的等价性的方法和装置。 呈现信号格式转换器以将诸如二进制或二进制补码的第一数字系统中的输入信号转换成第二数字系统。 在维特比解码器的输入端实现的信号格式转换器允许使用为曼哈顿度量标准设计的维特比解码器，其中信号以二进制补码表示。 类似地，为Hamming度量方案设计的维特比解码器可以在其中信号以无符号二进制表示的应用中实现。 信号格式转换器可以与硬判决维特比解码器和软判决维特比解码器一起使用。 在使用软判决维特比解码器的情况下，通过采用累积成本差的绝对值的二进制补码，可以将基于曼哈顿度量方案的维特比解码器的软符号转换为等效汉明软符号。 在维特比解码器基于汉明度量方案的情况下，可以通过获取软符号解码输出的绝对值来获得等效的曼哈顿软码元。