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公开(公告)号：US07526010B1
公开(公告)日：2009-04-28
申请号：US10915776
申请日：2004-08-10
申请人： Johnny M. Harris , Samuel C. Kingston , Thomas R. Giallorenzi , Dan M. Griffin , David W. Thorson , Richard B. Ertel
发明人： Johnny M. Harris , Samuel C. Kingston , Thomas R. Giallorenzi , Dan M. Griffin , David W. Thorson , Richard B. Ertel
IPC分类号： H04B1/00
CPC分类号： H04B1/7093
摘要： A composite code is made for example by exclusive-OR'ing each real element of a first constituent code A with each element of a second constituent code B to obtain a basic composite code. To suppress autocorrelation, differing numbers of doping code elements are inserted between code segments made from combining each element of code A with an element of code B. A matched filter first stage removes from its input the A code and any doping code added to it, summing the elements of code A. A matched filter second stage removes from its input the B code and any doping code added at the second level. The summed elements of code B are the input to the first stage. Optionally, the summed elements of the doping code at any level may be delayed and summed with the elements of the A code in the first stage.
摘要翻译： 例如，通过将第一组成代码A的每个实际元素与第二组成代码B的每个元素进行异或运算以获得基本复合代码来进行复合代码。 为了抑制自相关，在将代码A的每个元素与代码B的元素组合而形成的代码段之间插入不同数量的掺杂代码元素。匹配滤波器第一级从其输入中去除A代码和添加到其中的任何掺杂代码， 对代码A的元素求和。匹配滤波器第二级从其输入中移除B代码和在第二级添加的任何掺杂代码。 代码B的总和元素是第一阶段的输入。 可选地，任何级别的掺杂代码的总和元素可以被延迟并与第一级中的A代码的元素相加。
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12.发明授权S-CDMA fixed wireless loop system employing subscriber unit/radio base unit super-frame alignment 失效采用用户单元/无线电基站单元超帧对准的S-CDMA固定无线环路系统
公开(公告)号：US6011788A
公开(公告)日：2000-01-04
申请号：US987815
申请日：1997-12-10
申请人： Michael Hurst , Johnny Harris , Dan M. Griffin , Lee Butterfield , Thomas R. Giallorenzi , Kyle L. Henderson
发明人： Michael Hurst , Johnny Harris , Dan M. Griffin , Lee Butterfield , Thomas R. Giallorenzi , Kyle L. Henderson
CPC分类号： H04W56/0015
摘要： A method is disclosed for operating a synchronous Code Division Multiple Access (S-CDMA) radio frequency communication system having a host transceiver unit and a plurality of user transceiver units. The method includes an initial step of defining a super-frame to be comprised of N sequential frames of data. In the preferred embodiment N is equal to three. For a user transceiver unit that obtains access to the host transceiver unit a next step of the method receives frames of data transmitted by the host transceiver unit and initially aligns a receiver timing and a transmitter timing of the user transceiver unit to a super-frame boundary of the received frames. A next step transmits frames of data from the user transceiver unit to the host transceiver unit using the initial timing alignment. A further step of the method detects at the host transceiver unit a difference between the arrival of the transmitted frames of data and a super-frame boundary and then transmits a timing correction parameter, preferably expressed in symbols, from the host transceiver unit to the user transceiver unit in order to align the transmitted frames of data to the super-frame boundary.
摘要翻译： 公开了一种用于操作具有主机收发器单元和多个用户收发器单元的同步码分多址（S-CDMA）射频通信系统的方法。 该方法包括定义由N个连续数据帧组成的超帧的初始步骤。 在优选实施例中，N等于3。 对于获得对主收发器单元的访问的用户收发器单元，该方法的下一步骤接收主机收发器单元发送的数据帧，并且最初将用户收发器单元的接收机定时和发送器定时对齐到超帧边界 的接收帧。 下一步骤将使用初始定时对准将数据帧从用户收发器单元发送到主机收发器单元。 该方法的另一步骤在主机收发器单元处检测所发送的数据帧的到达与超帧边界之间的差异，然后将来自主收发器单元的优选地以符号表示的定时校正参数发送到用户 收发器单元，以便将发送的数据帧对齐到超帧边界。
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公开(公告)号：US4121290A
公开(公告)日：1978-10-17
申请号：US788371
申请日：1977-04-18
申请人： Royce Allen , Jerry L. Sutton , Dan M. Griffin , Hal W. Frye , Joseph G. Colborn
发明人： Royce Allen , Jerry L. Sutton , Dan M. Griffin , Hal W. Frye , Joseph G. Colborn
摘要： An analog apparatus for determining the velocity of sound at a selected position in a liquid media is provided with a means for representing the conductivity, temperature, and depth of the position in the form of analog voltages, and is further provided with an analog calculating means receiving each of the voltages for calculating the velocity of sound as a function of conductivity, temperature, and depth. The sound velocity may be calculated at a succession of positions to provide a sound velocity versus depth profile of the liquid media.
摘要翻译： 用于确定液体介质中选定位置处的声速的模拟装置具有用于以模拟电压的形式表示位置的电导率，温度和深度的装置，还具有模拟计算装置 接收用于计算作为电导率，温度和深度的函数的声速的每个电压。 可以在连续的位置处计算声速，以提供液体介质的声速与深度分布。
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公开(公告)号：US4118782A
公开(公告)日：1978-10-03
申请号：US780750
申请日：1977-03-24
CPC分类号： G01H5/00
摘要： A digital apparatus for determining the velocity of sound at a selected position in a liquid media is provided with a means for representing the conductivity, temperature and depth of the position in the form of digital numbers, and provides a digital calculating means receiving each of the digital numbers for calculating the velocity of sound as a function of conductivity, temperature, and depth. The sound velocity may be calculated at a succession of positions to provide sound velocity versus depth profile of the liquid media.
摘要翻译： 用于确定在液体介质中的选定位置处的声速的数字装置设置有用于以数字数字的形式表示位置的电导率，温度和深度的装置，并且提供数字计算装置， 用于计算声速作为电导率，温度和深度的函数的数字数字。 可以在连续的位置处计算声速，以提供液体介质的声速与深度曲线。
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15.发明授权System and method for detecting a presence and frequency offset of a spread spectrum radio frequency signal 有权用于检测扩频射频信号的存在和频率偏移的系统和方法公开(公告)号：US07672415B1
公开(公告)日：2010-03-02
申请号：US11540136
申请日：2006-09-28
IPC分类号： H04L7/00
CPC分类号： H04L7/043
摘要： A system and method for detecting a presence and frequency offset of a spread spectrum radio frequency signal is disclosed. The method comprises receiving the spread spectrum radio signal. The signal can be sampled to form a plurality of signal samples. Each signal sample can be multiplied by a complex conjugate of a proximate signal sample to form a plurality of signal sample pairs. The signal sample pairs can be summed over a predetermined dwell time period to form a data vector having a magnitude and angle offset to enable detection of the signal and to enable a frequency offset between the spread spectrum radio frequency signal and a receiver frequency reference to be determined.
摘要翻译： 公开了一种用于检测扩频射频信号的存在和频率偏移的系统和方法。 该方法包括接收扩频无线电信号。 信号可被采样以形成多个信号采样。 每个信号样本可以乘以邻近信号样本的复共轭以形成多个信号样本对。 信号样本对可以在预定的停留时间周期内相加以形成具有幅度和角度偏移的数据矢量，以使得能够检测信号，并且使得扩频射频信号和接收机频率参考之间的频率偏移能够是 决心。
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公开(公告)号：US07602835B1
公开(公告)日：2009-10-13
申请号：US10915777
申请日：2004-08-10
申请人： Samuel C. Kingston , Johnny M. Harris , Thomas R. Giallorenzi , Dan M. Griffin , David W. Thorson
发明人： Samuel C. Kingston , Johnny M. Harris , Thomas R. Giallorenzi , Dan M. Griffin , David W. Thorson
IPC分类号： H04B1/00
CPC分类号： H04B1/7095 , H04B2201/70703 , H04B2201/70707
摘要： A correlator despreads a P/N long code constructed from two or more constituent codes A, B, C having N, M and L elements respectively. In a third stage, L filter taps decorrelate elements of the third constituent code from the input received signal, leaving elements of code AB. The outputs of the third stage delay line are summed and input into a second stage delay line having M filter taps to decorrelate the elements of the second constituent code from the input to the second stage, leaving elements of code A. The outputs of the second stage delay line are summed and input to a first stage delay line having N filter taps. The output of the first stage delay line is summed and input into a shift register. An energy peak in the shift register indicates the phase of the P/N elements in the register is proper.
摘要翻译： 相关器分别从具有N，M和L个元素的两个或更多个组成码A，B，C构成的P / N长码解扩。 在第三阶段，L滤波器从输入接收信号抽头去除关联第三组成码的元素，留下代码AB的元素。 将第三级延迟线的输出相加并输入具有M个滤波器抽头的第二级延迟线，以将第二组成码的元素从输入到第二级去相关，留下代码A的元素。第二级延迟线的输出 相位延迟线被相加并输入到具有N个滤波器抽头的第一级延迟线。 将第一级延迟线的输出相加并输入到移位寄存器。 移位寄存器中的能量峰值表示寄存器中P / N元件的相位是否正确。
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17.发明授权System and method for determining a fine frequency offset of a received signal 有权用于确定接收信号的精细频率偏移的系统和方法公开(公告)号：US07602834B1
公开(公告)日：2009-10-13
申请号：US11540139
申请日：2006-09-28
IPC分类号： H04B1/00
CPC分类号： H04B1/70752 , H04L2027/0065 , H04W24/00
摘要： A system and method for determining a fine frequency offset of a composite code spread spectrum signal is disclosed. The method includes despreading at least one component of the composite spread spectrum signal to form a partially despread composite spread spectrum signal. A set of on-time samples are selected from the signal. The set of on-time samples are rotated by a predetermined frequency amount. The set of rotated samples are placed into a plurality of frequency bins, with each frequency bin representative of a different frequency estimate. An energy for the signal in each frequency bin is determined to find the bin having the greatest energy.
摘要翻译： 公开了一种用于确定复合码扩频信号的精细频率偏移的系统和方法。 该方法包括解扩复合扩频信号的至少一个分量以形成部分解扩复合扩频信号。 从信号中选择一组接通时间样本。 该一组接通时间样品旋转预定频率量。 旋转的样本集合被放置在多个频率仓中，每个频率块表示不同的频率估计。 确定每个频率仓中的信号的能量以找到具有最大能量的仓。
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18.发明授权Method and device for compensating for digital data demodulation phase uncertainty 失效用于补偿数字数据解调相位不确定度的方法和装置公开(公告)号：US07164733B1
公开(公告)日：2007-01-16
申请号：US10273929
申请日：2002-10-17
IPC分类号： H04L27/00
CPC分类号： H04L27/227 , H04L2027/003 , H04L2027/0055 , H04L2027/0067
摘要： A method and system for compensating digital data demodulation phase uncertainty is provided. The method includes the steps of identifying a phase reference quadrant, the phase reference quadrant having a phase reference axis and four quadrants, I, II, III, and IV; receiving known digital data; and forming a phase vector from the known digital data, determining which quadrant the phase vector is located in and rotating the phase vector to the phase reference quadrant if it is determined that the phase vector is not located in the phase reference quadrant. The last step generates a phase error signal proportional to the resulting angle by rotating the phase vector −45° and measuring the resulting angle between the phase vector and the phase reference axis.
摘要翻译： 提供了一种用于补偿数字数据解调相位不确定性的方法和系统。 该方法包括以下步骤：识别相位参考象限，相位参考象限具有相位参考轴和四个象限I，II，III和IV; 接收已知的数字数据; 以及如果确定相位矢量不位于相位参考象限中，则从已知的数字数据形成相位矢量，确定相位矢量所在的象限，并将相位矢量旋转到相位参考象限。 最后一步通过旋转相位矢量-45°并测量相位矢量和相位参考轴之间产生的角度，产生与所得到的角度成比例的相位误差信号。
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公开(公告)号：US07760697B1
公开(公告)日：2010-07-20
申请号：US11136789
申请日：2005-05-24
CPC分类号： H04B7/18504 , H04B1/74
摘要： A first node seeking entry into a secure spread spectrum communications network sends a discovery burst at a low rate, and sends traffic bursts at a higher rate to exchange data rate for range. A receiving node receives discovery bursts via an omni-directional link and transmits and receives traffic bursts via directional links. As a node within the network detects a fading signal, it transmits a discovery burst at low rate on both its uplink and downlink channels. Other nodes may reply via the original uplink channel, and the fading node updates a list of candidate nodes through which it can relay through the network to its intended recipient by reversing the link direction of its original uplink and original downlink channels.
摘要翻译： 寻求进入安全扩频通信网络的第一节点以低速率发送发现突发，并以更高的速率发送业务突发以交换范围的数据速率。 接收节点通过全向链路接收发现突发，并通过定向链路发送和接收业务突发。 由于网络内的一个节点检测到衰落信号，所以它在其上行链路和下行链路信道上都以低速率传输发现突发。 其他节点可以通过原始上行链路信道进行应答，并且衰落节点通过反转其原始上行链路和原始下行链路信道的链路方向来更新其可以通过网络中继到其预期接收者的候选节点的列表。
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20.发明授权Correlation apparatus and method for accomodating spreading code frequency offset 有权用于适应扩频码频偏的相关装置和方法公开(公告)号：US07664164B1
公开(公告)日：2010-02-16
申请号：US11351465
申请日：2006-02-10
IPC分类号： H04B1/00
CPC分类号： H04B1/7093 , H04B1/7075
摘要： An apparatus and method for correlating a signal over a correlation interval while accommodating spreading code frequency offset is described. In one embodiment, the apparatus includes a plurality of correlators, where each correlator forms a correlation result corresponding to a unique code frequency offset hypothesis. Each correlator selects samples from a tapped delay line at a tap position moved along the delay line at a rate corresponding to the correlator unique code frequency offset hypothesis.
摘要翻译： 描述了一种用于在适应扩展码频率偏移的同时在相关间隔上相关信号的装置和方法。 在一个实施例中，该装置包括多个相关器，其中每个相关器形成对应于唯一代码频率偏移假设的相关结果。 每个相关器以对应于相关器唯一代码频率偏移假设的速率沿着延迟线移动的抽头位置处的抽头延迟线选择样本。
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