公开(公告)号：US07130333B2

公开(公告)日：2006-10-31

申请号：US09995095

申请日：2001-11-27

申请人： Leroy Andrew Gibson, Jr. ,  Dan M. Griffin ,  Lyman D. Horne ,  Randal R. Sylvester

发明人： Leroy Andrew Gibson, Jr. ,  Dan M. Griffin ,  Lyman D. Horne ,  Randal R. Sylvester

IPC分类号： H04B1/707

CPC分类号： H04B1/7075

摘要： A method and device for frame sync detection using signal combining and correlation. The method comprises the steps of despreading PN coded signals to provide in-phase I1–In, and quadrature phase Q1–Qn signals, wherein each I1–In and each Q1–Qn signal contains at least one sync bit and n≧2. The at least one sync bit from each I1–In, and quadrature phase Q1–Qn signals are summed to form sums Is1 and Qs1, respectively. The next step provides a reference sync having at least one bit and compares each sum Is1 and Qs1 with the at least one reference bit. The results of each Is1 and Qs1 comparison are accumulated so as to form two accumulates, IA and QA, respectively. Each accumulate IA and QA, is squared to form IA2 and QA2 from which the sum IA2 and QA2 is formed. The sum IA2+QA2 is compared with a predetermined threshold and as a result of the comparison a determination of whether frame sync has been achieved is made.

摘要翻译： 一种使用信号组合和相关的帧同步检测的方法和装置。 该方法包括以下步骤：对PN编码信号进行解扩，以提供同相I 1 -I N n N，以及正交相位Q 1 -Q 1， 其中每个I 1 -I n个和每个Q 1 -Q N n个/ N个 >信号包含至少一个同步位，n> = 2。 来自每个I 1 -I N SUB的至少一个同步位以及正交相位Q 1 -Q N n N 信号被相加以形成和分别分别为I S 1和S 2。 下一步骤提供具有至少一个比特的参考同步，并将每个和I 1和S 1和S 1＆lt; S 1＆lt;和＆lt; S 1＆lt;＆gt;和至少一个参考比特进行比较。 每个I＆lt; s1＆gt;和＆lt; s1＆lt;比较比较的结果被累积，以便形成两个累加， SUB>。 每个累加I A和A A A均被平方以形成I A 2和Q A 2， 总和2和/或2＆lt; 2＆gt;和＆lt; 2＆gt; 2＆lt; 2＆gt; 形成了。 将总和与预定阈值进行比较，并作为比较的结果。 确定是否已经实现帧同步。

公开(公告)号：US07164733B1

公开(公告)日：2007-01-16

申请号：US10273929

申请日：2002-10-17

申请人： Dan M. Griffin ,  Randal R. Sylvester

发明人： Dan M. Griffin ,  Randal R. Sylvester

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。

公开(公告)号：US09341677B1

公开(公告)日：2016-05-17

申请号：US13427666

申请日：2012-03-22

申请人： Dan M. Griffin ,  Scott C. Smedley

发明人： Dan M. Griffin ,  Scott C. Smedley

IPC分类号： G01R31/3183 ,  G01R31/3185 ,  G01R31/319 ,  G01R31/40

CPC分类号： G01R31/318558 ,  G01R31/31725 ,  G01R31/31726 ,  G01R31/31922

摘要： A data alignment method is provided by iteratively increasing the delay of each data input line of a system component until a test signal transmitted on each data input line is received at the system component at substantially a predetermined time.

摘要翻译： 通过迭代地增加系统组件的每个数据输入线的延迟直到在每个数据输入线上发送的测试信号在基本上预定的时间在系统组件处被接收来提供数据对准方法。

公开(公告)号：US08073084B1

公开(公告)日：2011-12-06

申请号：US12691578

申请日：2010-01-21

申请人： Thomas R. Giallorenzi ,  Johnny M. Harris ,  Dan M. Griffin ,  Richard Ertel ,  Eric K. Hall

发明人： Thomas R. Giallorenzi ,  Johnny M. Harris ,  Dan M. Griffin ,  Richard Ertel ,  Eric K. Hall

IPC分类号： H03D1/00

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。

公开(公告)号：US07313196B1

公开(公告)日：2007-12-25

申请号：US10608489

申请日：2003-06-26

申请人： Eric K. Hall ,  Richard B. Ertel ,  Dan M. Griffin ,  Tom R. Giallorenzi

发明人： Eric K. Hall ,  Richard B. Ertel ,  Dan M. Griffin ,  Tom R. Giallorenzi

IPC分类号： H04K1/02

CPC分类号： G06F7/4818 ,  H04L27/3809 ,  H04L27/389

摘要： A system for baseband amplitude limiting is provided. The system includes a CORDIC vector mode rotator device having an angle accumulator in addition to a gain device and limiter. The system also includes a second CORDIC rotator operating in rotation mode, and is coupled to the limiter.

摘要翻译： 提供了一种用于基带幅度限制的系统。 该系统包括除了增益装置和限制器之外还具有角度累加器的CORDIC矢量模式旋转器装置。 该系统还包括以旋转模式操作的第二个CORDIC旋转器，并连接到限制器。

公开(公告)号：US06999446B2

公开(公告)日：2006-02-14

申请号：US10039514

申请日：2001-10-26

申请人： Eric K. Hall ,  Thomas R. Giallorenzi ,  Richard B. Ertel ,  Lee A. Butterfield ,  Dan M. Griffin ,  Philip L. Stephenson

发明人： Eric K. Hall ,  Thomas R. Giallorenzi ,  Richard B. Ertel ,  Lee A. Butterfield ,  Dan M. Griffin ,  Philip L. Stephenson

IPC分类号： H04J3/24

CPC分类号： H04W16/12 ,  H01Q1/246 ,  H01Q21/205 ,  H04B1/707 ,  H04B2201/70701 ,  H04B2201/70703 ,  H04B2201/709709 ,  H04J13/0074 ,  H04L1/0003 ,  H04L1/0009 ,  H04W16/02

摘要： A method is disclosed for operating a wireless communications system, such as a DS-CDMA communications system, by transmitting a waveform that includes a plurality of repeating frames each having x header training base symbols in a header training symbol field (TH) and y tail training base symbols in a tail training symbol field (TT). The frame is received and functions as one of a plurality of different types of frames depending on the content of at least TT. In the preferred embodiment the frame functions as one of a normal traffic frame, a termination frame, or a legacy frame providing backwards compatibility with another waveform. A given one of the frames includes four equal-size data fields separated by three equal-sized control fields, the header training symbol field (TH) and the tail training symbol field (TT).

公开(公告)号：US07633995B1

公开(公告)日：2009-12-15

申请号：US11351608

申请日：2006-02-10

申请人： Thomas R. Giallorenzi ,  Johnny M. Harris ,  Dan M. Griffin ,  Richard Ertel ,  Eric K. Hall

发明人： Thomas R. Giallorenzi ,  Johnny M. Harris ,  Dan M. Griffin ,  Richard Ertel ,  Eric K. Hall

IPC分类号： H04B1/00

CPC分类号： H04B1/7075 ,  H04B1/713

摘要： A technique for receiving multiple spread spectrum bursts is disclosed. Each spread spectrum burst is encoded with a common spreading code and may include an individual message and unique signal parameters. The technique includes the detection of the spread spectrum encoded bursts and estimation of the reception signal parameters. A single one of a plurality of burst receivers is assigned to each detected burst to extract the individual message of the detected burst.

摘要翻译： 公开了一种用于接收多个扩展频谱脉冲串的技术。 每个扩展频谱突发都用公共扩展码进行编码，并且可以包括单独的消息和唯一的信号参数。 该技术包括对扩频编码突发的检测和接收信号参数的估计。 将多个突发接收机中的单个接收机分配给每个检测到的突发以提取检测到的突发的单独消息。

公开(公告)号：US07609751B1

公开(公告)日：2009-10-27

申请号：US11136783

申请日：2005-05-24

申请人： Thomas R. Giallorenzi ,  Johnny M. Harris ,  Eric K. Hall ,  Richard B. Ertel ,  Dan M. Griffin

发明人： Thomas R. Giallorenzi ,  Johnny M. Harris ,  Eric K. Hall ,  Richard B. Ertel ,  Dan M. Griffin

IPC分类号： H04B1/00

CPC分类号： H04B1/7087 ,  H04B1/7075

摘要： A first node initiating communications with a second node already in a secure network sends a discovery burst having a preamble portion and a payload portion. The preamble portion is sent at a varying frequency between high and low thresholds that are reflective of Doppler uncertainty between the nodes. The second node continuously listens at a frequency, termed an acquisition frequency. A data sequence in the preamble portion, known to the second node, is received and used to determine the receive instant in the preamble portion, and thereby compare against the known frequency ramp to determine the frequency at which the payload portion will be received. Preferably, the first node varies the preamble portion between thresholds more than once within the time span of a single preamble portion, and the preamble and payload portions are spread with different spreading codes. The preamble portion may also be disguised with noise generated by the first node.

摘要翻译： 发起与已经在安全网络中的第二节点的通信的第一节点发送具有前导码部分和有效载荷部分的发现脉冲串。 前导码部分以反映节点之间的多普勒不确定性的高阈值和低阈值之间的变化频率发送。 第二个节点连续以一个频率收听，称为采集频率。 在第二节点已知的前同步码部分中的数据序列被接收并用于确定前同步码部分中的接收时刻，从而与已知的频率斜坡进行比较，以确定有效负载部分将被接收的频率。 优选地，第一节点在单个前导码部分的时间跨度内多于一次地改变阈值之间的前导码部分，并且前导码和有效载荷部分以不同的扩展码扩展。 前同步码部分也可以伪装成由第一节点产生的噪声。

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。

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

IPC分类号： H04B7/26 ,  H04L7/08 ,  H04W56/00 ,  H04B7/216

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。