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1. 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).

2. 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。

3. 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。

4. 发明授权

US07760697B1 Fast and long range node discovery in spread spectrum networks 有权
标题翻译：快速和长距离节点在扩频网络中的发现
公开(公告)号：US07760697B1
公开(公告)日：2010-07-20
申请号：US11136789
申请日：2005-05-24
申请人： Thomas R. Giallorenzi , Johnny M. Harris , Dan M. Griffin , Richard B. Ertel , Eric K. Hall
发明人： Thomas R. Giallorenzi , Johnny M. Harris , Dan M. Griffin , Richard B. Ertel , Eric K. Hall
IPC分类号： H04B7/216 , H04J13/00
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。

5. 发明授权

US07545878B1 Efficient circular clipping implementation using simplified CORDIC rotators 有权
标题翻译：使用简化的CORDIC旋转器实现高效的圆截距实现
公开(公告)号：US07545878B1
公开(公告)日：2009-06-09
申请号：US10608374
申请日：2003-06-26
申请人： Eric K. Hall , Richard B. Ertel , Dan M. Griffin , Thomas R. Giallorenzi
发明人： Eric K. Hall , Richard B. Ertel , Dan M. Griffin , Thomas R. Giallorenzi
IPC分类号： H04B15/00
CPC分类号： G06F7/4818
摘要： A system for the efficient use of CORDIC rotators is provided. The system includes at least one first rotator operating in vector mode and includes a sign storage buffer. The system also includes at least one bit inverter coupled between the first rotator and a second rotator, the second rotator operating in rotation mode.
摘要翻译：提供了一种有效利用CORDIC转子的系统。该系统包括至少一个以向量模式操作的第一旋转器，并且包括符号存储缓冲器。该系统还包括耦合在第一旋转器和第二旋转器之间的至少一个位逆变器，第二旋转器以旋转模式操作。

6. 发明授权

US07606292B1 Sub-sequence accumulation filter and method 有权
标题翻译：子序累积滤波器和方法
公开(公告)号：US07606292B1
公开(公告)日：2009-10-20
申请号：US11136782
申请日：2005-05-24
申请人： Johnny M. Harris , Thomas R. Giallorenzi , Dan M. Griffin , Eric K. Hall , Richard B. Ertel
发明人： Johnny M. Harris , Thomas R. Giallorenzi , Dan M. Griffin , Eric K. Hall , Richard B. Ertel
IPC分类号： H04L5/12
CPC分类号： H04B1/709 , H04B1/7093 , H04B2201/70707
摘要： A parallel correlator and method includes temporarily storing in a series of P sequence registers, each of length R1, serial bit-sequences of a code of length N=P*R1. In a first-level of processing, certain unique bit sequences are inverted to reduce the number of unique bit sequences by half. Identical bit-sequences are then combined and temporarily stored in a first-level sub-accumulation register. Alternatively, bit sequences differing by only one bit may be combined in a common first-level sub-accumulation register. Further levels of similar processing may be imposed, where each subsequent level taps and inverts only a portion of the bits in the above level of processing, thereby reducing the number of unique bit sequences. Finally, all negative energy is combined in one register position, inverted, and added to all positive energy in the other register positions. When the spreading code was aligned among the series of sequence registers, the energy is added coherently and an energy peak is output, indicating alignment of the spreading code in the sequence registers.
摘要翻译：并行相关器和方法包括临时存储长度为R1，长度为N = P * R1的码的串行比特序列的一系列P序列寄存器。在第一级处理中，某些唯一的比特序列被反转以将唯一比特序列的数量减少一半。然后将相同的比特序列组合并临时存储在第一级子累加寄存器中。或者，只有一位不同的比特序列可以组合在公共的第一级子累加寄存器中。可以施加更多级别的类似处理，其中每个后续级别在上述处理级别中仅抽头并反转一部分位，由此减少唯一位序列的数量。最后，所有负能量组合在一个寄存器位置，反相，并加到其他寄存器位置的所有正能量上。当扩展码在一系列序列寄存器中对齐时，相干地加入能量，并输出能量峰值，指示序列寄存器中扩展码的对齐。

7. 发明授权

US07369606B1 Phase error detector using I/Q interference cancellation 有权
标题翻译：使用I / Q干扰消除的相位误差检测器
公开(公告)号：US07369606B1
公开(公告)日：2008-05-06
申请号：US10783048
申请日：2004-02-19
申请人： Richard B. Ertel , Dan M. Griffin , Johnny M. Harris , Eric K. Hall , Thomas R. Giallorenzi
发明人： Richard B. Ertel , Dan M. Griffin , Johnny M. Harris , Eric K. Hall , Thomas R. Giallorenzi
IPC分类号： H04B3/46
CPC分类号： H04L27/0014 , H04L2027/0053 , H04L2027/0067
摘要： A method is presented for estimating a phase error for first (rI) and second (rQ) orthogonal signal components spread respectively by different first cI and second cQ spreading codes. A cross-despread value IdQ and/or QdI is determined by despreading one signal component with the spreading codes associated with the other signal component (rI with cQ or rQ with cI). In parallel, the same signal component is also despread with its associated spreading code to determine an estimated data symbol for that component. An interference of Q into I or I into Q is calculated and multiplied by the estimated data symbol, and subtracted from the cross-despread value to achieve an estimate of phase error. Preferably, both cross-despread values are obtained, normalized to a common data rate, scaled to maximize signal to noise ratio, and combined into one phase error estimate. A phase error detector includes despreaders, multipliers, and adders to determine the cross-despread value and subtract the interference from it.
摘要翻译：提出了一种用于估计分别通过不同的第一（i）和（i）个正交信号分量传播的第一（r）I / Q）正交信号分量的相位误差的方法， SUB＆gt;和第二个C＆lt; Q＆gt;扩展码。通过使用与另一个信号分量相关联的扩展码来解扩一个信号分量来确定交叉解扩值IdQ和/或QdI，其中，具有与其他信号分量相关联的扩展码（r 其中C 1和Q 3与C 1 H 3）。并行地，相同的信号分量也用其相关联的扩展码进行解扩，以确定该分量的估计数据符号。计算Q到I或I中的Q到Q的干扰，并将其乘以估计的数据符号，并从交叉解扩值中减去以实现相位误差的估计。优选地，获得两个交叉解扩值，被归一化为公共数据速率，被缩放以最大化信噪比，并且被组合成一个相位误差估计。相位误差检测器包括解扩器，乘法器和加法器，以确定交叉解扩值并从其中减去干扰。

8. 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。

9. 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。

10. 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。

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