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51. 发明授权

US07912156B1 Digital communications method and system for communicating over channels with block fading and burst jamming 有权
标题翻译：数字通信方法和系统，用于通过信道通过块衰落和突发干扰
公开(公告)号：US07912156B1
公开(公告)日：2011-03-22
申请号：US10820347
申请日：2004-04-07
申请人： Eric K. Hall , Ayyoob Abbaszadeh , Thomas R. Giallorenzi
发明人： Eric K. Hall , Ayyoob Abbaszadeh , Thomas R. Giallorenzi
IPC分类号： H04L27/06
CPC分类号： H04L27/20 , H03M13/152 , H03M13/2906 , H03M13/2936 , H03M13/2957 , H03M13/373 , H03M13/63 , H04B7/18506 , H04L1/0045 , H04L1/0065 , H04L1/0066
摘要： Method and apparatus are disclosed for obtaining improved performance when using Forward Error Correction (FEC) with channels experiencing block fading or burst jamming over some number of contiguous symbols. One suitable application is when the channel is periodically obstructed due to the rotation of a propeller blade, resulting in a periodic block fading channel. During operation zero symbols are inserted into the received signal stream, prior to the FEC decoder at times that are estimated or otherwise determined to correspond to periods of jamming or severe fading. The zero symbols effectively “erase” the severely degraded symbols. The zero symbols are less detrimental to the FEC decoder than the severely degraded symbols, especially when the channel interleaving/de-interleaving operations result in the zero symbols being temporarily distributed over a large block of received symbols.
摘要翻译：公开了用于在使用经过块衰落的信道的前向纠错（FEC）或在某些数量的连续符号上的突发干扰时获得改进的性能的方法和装置。一个合适的应用是当通道由于螺旋桨叶片的旋转而周期性地阻塞时，导致周期性的块衰落通道。在操作期间，在被估计或以其他方式确定为对应于干扰或严重衰落的周期的时间，在FEC解码器之前，零符号被插入到接收信号流中。零符号有效地“抹除”严重退化的符号。特别是当信道交织/解交织操作导致零符号临时分布在大块接收到的符号上时，零符号对FEC解码器的影响比严重降级的符号更不利。

52. 发明授权

US07634033B1 Spread spectrum detection system and method 有权
标题翻译：扩频检测系统及方法
公开(公告)号：US07634033B1
公开(公告)日：2009-12-15
申请号：US11351464
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： H04B1/10
CPC分类号： H04B1/7075
摘要： A system and method for detecting a spread spectrum encoded message within a received signal is described. The spread spectrum encoded message has an unknown code phase, unknown code frequency offset, and unknown carrier frequency offset. A plurality of code phase hypotheses, code frequency offset hypotheses, and carrier frequency offset hypotheses are searched in parallel. The unknown code phase, unknown code frequency offset, and unknown carrier frequency offset may also be estimated.
摘要翻译：描述了用于在接收信号内检测扩频编码消息的系统和方法。扩频编码消息具有未知码相位，未知码频率偏移和未知载波频率偏移。并行搜索多个码相位假设，码频偏置假设和载波频偏估计。还可以估计未知码相位，未知码频率偏移和未知载波频率偏移。

53. 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。

54. 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。

55. 发明授权

US07301985B1 Pseudo-noise code hopping method and apparatus 有权
标题翻译：伪噪声码跳频方法及装置
公开(公告)号：US07301985B1
公开(公告)日：2007-11-27
申请号：US10610968
申请日：2003-06-30
申请人： Eric K. Hall , Thomas R. Giallorenzi , Richard B. Ertel
发明人： Eric K. Hall , Thomas R. Giallorenzi , Richard B. Ertel
IPC分类号： H04B1/69
CPC分类号： H04B1/707 , H04J13/004 , H04J13/0074
摘要： A PN code hopping method for mitigating cross-correlation interference is provided. The method includes the steps of providing a memory device and storing a plurality of PN codes, where each PN code is associated with a useful life cycle. The PN codes are pseudo-randomly accessed and used to spread a modulated signal for their respective useful life cycle before another PN code is pseudo-randomly retrieved.
摘要翻译：提供了一种用于减轻互相关干扰的PN码跳频方法。该方法包括以下步骤：提供存储器件并存储多个PN代码，其中每个PN代码与有用的生命周期相关联。 PN码是伪随机访问的，并且用于在另一个PN码被伪随机检索之前扩展其相应的有用生命周期的调制信号。

56. 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。

57. 发明授权

US07103026B2 Use of chip repetition to produce a flexible bandwidth DS-CDMA system 失效
公开(公告)号：US07103026B2
公开(公告)日：2006-09-05
申请号：US10038176
申请日：2001-10-24
申请人： Eric K. Hall , Richard B. Ertel , Thomas R. Giallorenzi
发明人： Eric K. Hall , Richard B. Ertel , Thomas R. Giallorenzi
IPC分类号： G01R31/08
CPC分类号： H04J13/10 , H01Q1/246 , H01Q21/205 , H04B1/707 , H04B2201/70703 , H04B2201/709709 , H04J13/0022 , H04J13/0074 , H04L1/0003 , H04L1/0009 , H04W16/02 , H04W16/12
摘要： A method is disclosed for obtaining a spreading code set for a code division multiple access (CDMA) communications system. The method includes (a) generating a P′×P′ spreading code set where P′=P/N, where P is the spreading gain in chips/symbol and where N is an integer multiple of 2; and (b) replicating chips in each spreading code by N to produce a P′×P spreading code set. The step of generating may include randomizing the spreading code set by performing at least one or row or column permutation. The P′×P spreading code set is subsequently loaded into system hardware for operating the system hardware with a bandwidth that is less than the bandwidth that would be required to operate with the P′×P′ Hadamard spreading code set. The CDMA system may be a synchronous, direct sequence code division multiple access communications system.

58. 发明授权

US07054286B2 Bandwidth allocation and data multiplexing scheme for direct sequence CDMA systems 失效
标题翻译：直接序列CDMA系统的带宽分配和数据复用方案
公开(公告)号：US07054286B2
公开(公告)日：2006-05-30
申请号：US09829092
申请日：2001-04-09
申请人： Richard B. Ertel , Eric K. Hall , Thomas R. Giallorenzi , Philip L. Stephenson , Johnny M. Harris , Edward P. Newren
发明人： Richard B. Ertel , Eric K. Hall , Thomas R. Giallorenzi , Philip L. Stephenson , Johnny M. Harris , Edward P. Newren
IPC分类号： H04Q7/00
CPC分类号： H04J13/16 , H04W72/044 , H04W72/0453 , H04W72/0466
摘要： This invention provides a highly flexible multiplexing scheme for Direct Sequence CDMA systems enabling the CDMA system to flexibly allocate CDMA channel resources between packet-switched broadcast channels and fast-circuit-switched dedicated channels in order to optimize system throughput. A method and system are provided for operating a communication system. The method has steps of: flexibly allocating CDMA channel resources between packet-switched broadcast channels and fast-circuit-switched dedicated channels in order to optimize system throughput, and employing a side channel as required to send all or a part of a total amount of data, depending on the total amount of the data. A bandwidth allocation scheme allocates a set of CDMA channels for burst packet-switched channels, and data is time division multiplexed over the set of burst CDMA channels providing a wide bandwidth data pipe for packet-switched data. Subscriber stations are equipped with multiple CDMA channel receivers tuned to the burst CDMA channels.
摘要翻译：本发明为直接序列CDMA系统提供了高度灵活的复用方案，使得CDMA系统能够在分组交换广播信道和快速电路交换专用信道之间灵活地分配CDMA信道资源，以优化系统吞吐量。提供了一种操作通信系统的方法和系统。该方法具有以下步骤：在分组交换广播信道和快速电路交换专用信道之间灵活地分配CDMA信道资源，以便优化系统吞吐量，并且根据需要采用侧信道来发送全部或部分总数数据，取决于数据的总量。带宽分配方案为突发分组交换信道分配一组CDMA信道，并且通过提供用于分组交换数据的宽带宽数据管道的突发CDMA信道集合对数据进行时分复用。用户站配备有被调谐到突发CDMA信道的多个CDMA信道接收机。

59. 发明授权

US06956838B2 Use of wide element spacing to improve the flexibility of a circular base station antenna array in a space division/multiple access synchronous CDMA communication system 有权
标题翻译：使用宽元件间距来提高空分/多址同步CDMA通信系统中圆形基站天线阵列的灵活性
公开(公告)号：US06956838B2
公开(公告)日：2005-10-18
申请号：US09834667
申请日：2001-04-13
申请人： Richard B. Ertel , Thomas R. Giallorenzi , Eric K. Hall
发明人： Richard B. Ertel , Thomas R. Giallorenzi , Eric K. Hall
IPC分类号： H01Q1/24 , H01Q21/20 , H04B1/69 , H04B1/707 , H04B7/155 , H04J13/00 , H04J13/16 , H04L1/00 , H04W16/02 , H04W16/12 , H04B7/216
CPC分类号： H04W16/12 , H01Q1/246 , H01Q21/205 , H04B1/707 , H04B2201/70703 , H04B2201/709709 , H04J13/0074 , H04J13/16 , H04L1/0003 , H04L1/0013 , H04W16/02
摘要： A method is disclosed for operating a synchronous space division multiple access, code division multiple access communications system, as is a system that operates in accordance with the method. The method operates, within a coverage area of a base station (BS), to assign the same spreading code to a plurality of subscriber stations (SSs) and to transmitting signals to, and receive signals from, the SSs using an antenna array having M elements, where M>1 and where the M elements are spaced apart by more than one-half wavelength from one another. The spacing is a function of a size of an aperture of the antenna array which is a function of a signal bandwidth to carrier frequency ratio. The antenna array aperture is preferably less than k=p/360*fc/B wavelengths, where p is a maximum acceptable phase variation over the signal bandwidth, where fc is the carrier frequency and where B is the signal bandwidth. The step of conducting communications includes steps of despreading a plurality of received signals; and beamforming the plurality of despread received signals. In a preferred embodiment individual ones of P orthogonal spreading codes are reused αM times within the coverage area, where 1/M
摘要翻译：公开了用于操作同步空分多址，码分多址通信系统的方法，以及根据该方法操作的系统。该方法在基站（BS）的覆盖区域内操作以向多个用户站（SS）分配相同的扩展码，并且使用具有M个天线阵列的信号向SS发送信号并从SS接收信号元素，其中M> 1并且M个元件彼此间隔开多于一个的波长。间隔是天线阵列的孔径的大小的函数，其是信号带宽与载波频率比的函数。天线阵列孔径优选地小于k = p / 360 * fc / B波长，其中p是信号带宽上的最大可接受相位变化，其中fc是载波频率，其中B是信号带宽。进行通信的步骤包括解扩多个接收信号的步骤; 以及波束成形所述多个解扩的接收信号。在优选实施例中，P个正交扩展码中的各个正交扩展码在覆盖区域内再次使用αM次，其中1 / M <α1= 1。

60. 发明授权

US06810028B1 Open loop timing control for synchronous CDA systems 有权
标题翻译：同步CDA系统的开环定时控制
公开(公告)号：US06810028B1
公开(公告)日：2004-10-26
申请号：US09656099
申请日：2000-09-06
申请人： Thomas R. Giallorenzi , David W Matolak , Douglas G. Bowen
发明人： Thomas R. Giallorenzi , David W Matolak , Douglas G. Bowen
IPC分类号： H04B7212
CPC分类号： H04W56/006 , H04B1/7085 , H04B7/2668 , H04W56/007
摘要： Method and apparatus for maintaining synchronization in a CDMA communication system by operating closed loop timing control between a radio base unit and subscriber units, operating open loop timing control between the radio base unit and the subscriber units, and using timing information derived from the open loop to correct the closed loop. Generally the open loop is faster in response than the closed loop. The open loop timing control may be generated by using GPS data. A radio base station and a subscriber unit operating in accordance with these principles.
摘要翻译：用于通过在无线电基站单元和用户单元之间操作闭环定时控制来维持CDMA通信系统中的同步的操作的方法和装置，操作无线电基站单元和用户单元之间的开环定时控制，以及使用从开环导出的定时信息纠正闭环。通常，开环响应比闭环更快。可以通过使用GPS数据来生成开环定时控制。无线电基站和根据这些原理操作的用户单元。

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