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1. 发明授权

US5966373A Waveform and frame structure for a fixed wireless loop synchronous CDMA communications system 失效
标题翻译：固定无线环路同步CDMA通信系统的波形和帧结构
公开(公告)号：US5966373A
公开(公告)日：1999-10-12
申请号：US988026
申请日：1997-12-10
申请人： Philip L Stephenson , Thomas R Giallorenzi , Johnny M Harris , Lee A Butterfield , Michael J Hurst , Dan M. Griffin , Rolf K. Thompson
发明人： Philip L Stephenson , Thomas R Giallorenzi , Johnny M Harris , Lee A Butterfield , Michael J Hurst , Dan M. Griffin , Rolf K. Thompson
IPC分类号： H04L1/00 , G06F11/10 , H04B20060101 , H04B1/707 , H04B7/216 , H04B7/26 , H04B15/00 , H04J3/00 , H04J3/24 , H04K1/00 , H04L1/02 , H04L7/00
CPC分类号： H04B1/707
摘要： Disclosed is a method for transmitting information in a CDMA communication system, the method including steps of (a) multiplexing data and control information into a data stream; (b) encoding the data stream to form a stream of encoded I/Q symbol pairs; (c) inserting synchronization information into the stream of encoded I/Q symbol pairs; and (d) spreading the encoded I/Q symbol pairs and the inserted synchronization information using a same pseudonoise (pn) spreading code prior to transmission as a frame. The preferred frame structure includes an unencoded synchronization field followed by a plurality of multi-byte data fields. Individual ones of the plurality of data fields are separated by a control message field. Individual ones of the control message fields contain a single byte of a multi-byte control message frame.
摘要翻译：公开了一种在CDMA通信系统中发送信息的方法，该方法包括以下步骤：（a）将数据和控制信息复用为数据流; （b）对数据流进行编码以形成编码的I / Q符号对的流; （c）将同步信息插入编码的I / Q符号对流中; 和（d）在作为帧传输之前，使用相同的伪噪声（pn）扩展码扩展编码的I / Q符号对和所插入的同步信息。优选的帧结构包括随后是多个多字节数据字段的未编码的同步字段。多个数据字段中的单个数据字段由控制消息字段分隔。控制消息字段中的单个字节包含多字节控制消息帧的单个字节。

2. 发明授权

US06999446B2 Adaptive, multi-rate waveform and frame structure for a synchronous, DS-CDMA system 失效
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).

3. 发明授权

US07190683B2 Two-dimensional channel bonding in a hybrid CDMA/FDMA fixed wireless access system to provide finely variable rate channels 失效
标题翻译：混合CDMA / FDMA固定无线接入系统中的二维信道绑定，以提供精细可变速率信道
公开(公告)号：US07190683B2
公开(公告)日：2007-03-13
申请号：US09829360
申请日：2001-04-09
申请人： Thomas R. Giallorenzi , Eric K. Hall , Richard B. Ertel , Philip L. Stephenson , Dan M. Griffin , Lee A. Butterfield
发明人： Thomas R. Giallorenzi , Eric K. Hall , Richard B. Ertel , Philip L. Stephenson , Dan M. Griffin , Lee A. Butterfield
IPC分类号： H04B7/216 , H04B7/208 , H04J13/00 , H04J1/00 , H04L27/00
CPC分类号： H04B7/2634 , H04B7/2621
摘要： A communications system employs the use of both synchronous CDMA and FDMA to provide a variable bandwidth waveform with multiple bonded transmitters and receivers that are agile in both frequency and PN code to permit a variable bandwidth and variable rate multiple access system. In a first aspect the teachings provide the use of both CDMA and FDMA together to enable an improved concentration efficiency by making a larger pool of bandwidth available to each user. In a second aspect these teachings enable channel bonding across both code space and frequency space, thus making the system capable of operating within a variable (not necessarily contiguous) bandwidth and at a finely variable rate.
摘要翻译：通信系统采用同步CDMA和FDMA两者来提供具有灵活的频率和PN码的多个绑定发射机和接收机的可变带宽波形，以允许可变带宽和可变速率多址接入系统。在第一方面，该教导提供了CDMA和FDMA两者的使用，以通过使更大的带宽池可用于每个用户来实现改进的集中效率。在第二方面，这些教导使得能够跨代码空间和频率空间进行通道绑定，从而使系统能够在可变（不一定是连续的）带宽内以可变速率运行。

4. 发明授权

US08073084B1 Correlation apparatus and method for accommodating spreading code frequency offset 有权
标题翻译：适应扩展码频偏的相关装置和方法
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。

5. 发明授权

US07633995B1 System and method for receiving spread spectrum encoded bursts using a common spreading code 有权
标题翻译：使用公共扩展码接收扩频编码突发的系统和方法
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。

6. 发明授权

US07609751B1 Method and apparatus to initiate communications between an unknown node and an existing secure network 有权
标题翻译：启动未知节点与现有安全网络之间的通信的方法和装置
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。

7. 发明授权

US07526010B1 Doped multi-rate spread spectrum composite code 有权
标题翻译：掺杂多速率扩频复合码
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。

8. 发明授权

US07672415B1 System and method for detecting a presence and frequency offset of a spread spectrum radio frequency signal 有权
标题翻译：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
申请人： Thomas R. Giallorenzi , Johnny M. Harris , Dan M. Griffin , Sam Kingston
发明人： Thomas R. Giallorenzi , Johnny M. Harris , Dan M. Griffin , Sam Kingston
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。

9. 发明授权

US07602835B1 Multi-rate spread spectrum composite code 有权
标题翻译：多速率扩频复合码
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。

10. 发明授权

US07602834B1 System and method for determining a fine frequency offset of a received signal 有权
标题翻译：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
申请人： Thomas R. Giallorenzi , Johnny M. Harris , Dan M. Griffin , Sam Kingston
发明人： Thomas R. Giallorenzi , Johnny M. Harris , Dan M. Griffin , Sam Kingston
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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