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    Power line communication system
    2.
    发明授权
    Power line communication system 失效
    电力线通信系统

    公开(公告)号：US5844949A

    公开(公告)日：1998-12-01

    申请号：US728020

    申请日：1996-10-09

    申请人： John Erik Hershey ,  Richard August Korkosz ,  Gary Jude Saulnier ,  Richard Charles Gaus, Jr. ,  Kenneth Brakeley Welles, II

    发明人： John Erik Hershey ,  Richard August Korkosz ,  Gary Jude Saulnier ,  Richard Charles Gaus, Jr. ,  Kenneth Brakeley Welles, II

    IPC分类号： H04B3/54 ,  H04L1/04 ,  H04L5/06 ,  H04B1/10 ,  H03D1/04 ,  H04L25/08

    CPC分类号： H04L1/04 ,  H04B3/54 ,  H04L5/06 ,  H04B2203/5416 ,  H04B2203/5495

    摘要： A system for communicating digital information over wires having a great deal of harmonic distortion, such as a power line, employs a transmitter which transmitter which creates a carrier wave for each of a plurality of signals to be sent. This carrier wave has frequency lobes positioned between the frequency lobes of the harmonic distortion. Each of the lobes of a single carrier signal is encoded with the same bit value during a given bit period. This signal is then mixed with any existing signal on the wire. At a remote receiver coupled to the wires, the signal is sensed, filtered, and Fourier transformed into coefficients. The signal-to-noise (S/N) ratio of each Fourier coefficient is determined by a novel S/N estimation technique. The coefficients are weighted based upon the S/N ratio estimation, and decoded, preferably by an inner product of the weighted Fourier coefficients. Additionally, the S/N ratio estimates could be time averaged before being used in the weighting and bit decoding.

    摘要翻译： 用于通过诸如电力线等大量谐波失真的电线传送数字信息的系统采用发射机，发射机为要发送的多个信号中的每一个产生载波。 该载波具有位于谐波失真的频率瓣之间的频率瓣。 在给定的位周期期间，单个载波信号的每个波瓣以相同的比特值进行编码。 然后将该信号与电线上的任何现有信号混合。 在耦合到导线的远程接收器处，信号被感测，滤波和傅里叶变换成系数。 每个傅立叶系数的信噪比（S / N）通过新的S / N估计技术来确定。 基于S / N比估计对系数进行加权，优选地通过加权傅里叶系数的内积来解码。 此外，在加权和比特解码之前，S / N比估计可以是时间平均的。

    Method and apparatus for TDMA slot synchronization with precision ranging
    3.
    发明授权
    Method and apparatus for TDMA slot synchronization with precision ranging 失效
    用于具有精确测距的TDMA时隙同步的方法和装置

    公开(公告)号：US5867489A

    公开(公告)日：1999-02-02

    申请号：US691964

    申请日：1996-08-05

    申请人： John Erik Hershey ,  Gary Jude Saulnier ,  Stephen Michael Hladik ,  Richard Charles Gaus, Jr. ,  Wayne Curtis Taft ,  Richard August Korkosz ,  Glen William Brooksby

    发明人： John Erik Hershey ,  Gary Jude Saulnier ,  Stephen Michael Hladik ,  Richard Charles Gaus, Jr. ,  Wayne Curtis Taft ,  Richard August Korkosz ,  Glen William Brooksby

    IPC分类号： G01S5/14 ,  G01S19/05 ,  G01S19/11 ,  G01S19/21 ,  G01S19/29 ,  G01S19/46 ,  H04B7/212 ,  H04J3/06 ,  H04J3/16

    CPC分类号： H04B7/2125 ,  H04J3/0605 ,  G01S5/14

    摘要： In a time division multiple access spacecraft communication system, each ground station determines when to send its information packets to arrive at the spacecraft at the beginning of a time slot. The calculation is based upon knowledge of the location of the spacecraft. A master ground station determines the location of the spacecraft by the use of the propagation delays between the various ground stations (including itself) and the spacecraft, together with knowledge of the locations of the ground stations. The spacecraft location is then transmitted back to the various ground stations. The determination of propagation delay by each ground station is performed in two major steps. The first step determines coarse time delay to within one bit interval by repeatedly transmitting a multibit unique word to the spacecraft, and counting bits until the next unique word is received from the spacecraft. To determine fine propagation delay, a high-frequency clock signal is counted from the time of transmission of each bit edge until the reception of the next bit edge. The sum of the coarse and fine delays, together with a plurality of frame intervals, establishes the range to the spacecraft.

    摘要翻译： 在时分多址航天器通信系统中，每个地面站确定在时隙开始时何时发送其信息分组到达航天器。 计算基于对航天器位置的了解。 主地面站通过使用各种地面站（包括其自身）和航天器之间的传播延迟以及地面站位置的知识来确定航天器的位置。 然后将航天器的位置传送回各个地面站。 每个地面站的传播延迟的确定在两个主要步骤中进行。 第一步通过向航天器重复发送多位唯一字，并计数位，直到从航天器接收到下一个唯一字，确定在一个位间隔内的粗略时间延迟。 为了确定精细的传播延迟，从每个位边沿的传输时间直到下一个位边沿的接收来计数高频时钟信号。 粗略和精细延迟的总和以及多个帧间隔建立了航天器的范围。

    Identification of an identifiable code sequence in a received signal by correlation with summed different-phase replicas of the sequence
    4.
    发明授权
    Identification of an identifiable code sequence in a received signal by correlation with summed different-phase replicas of the sequence 失效
    通过与序列的相加不相位复制相关来识别接收信号中的可识别码序列

    公开(公告)号：US06668012B1

    公开(公告)日：2003-12-23

    申请号：US09353655

    申请日：1999-07-15

    申请人： John Erik Hershey ,  Richard August Korkosz ,  Gary Jude Saulnier ,  Naofal Mohammed Wassel Al-Dhahir

    发明人： John Erik Hershey ,  Richard August Korkosz ,  Gary Jude Saulnier ,  Naofal Mohammed Wassel Al-Dhahir

    IPC分类号： H04L2730

    CPC分类号： H04B1/70753 ,  H04B1/7077

    摘要： A receiver for a unique word sequence or a spreading code sequence includes a memory which is preloaded with all possible phases of the code. The sequence in the received signal is correlated, in parallel, with sums of various ones of the different phases of the code. Thus, the received code is correlated with all possible phases of a replica of its own code. Consequently, one of the sums will exhibit a correlation peak, which indicates that the desired phase of the code is included in that particular sum. The other sums will not exhibit a correlation peak, and are is discarded. The different phases in the one sum which displayed correlation are divided into new sums, each having fewer phases, and the correlation is again performed. Again, those sums exhibiting no correlation are discarded, and the sum exhibiting correlation is divided into sums of fewer codes.

    摘要翻译： 用于唯一字序列或扩展码序列的接收机包括预先加载有代码的所有可能相位的存储器。 并行地将接收信号中的序列与码的不同相位的和进行相加。 因此，接收到的代码与其自己的代码的副本的所有可能的相位相关联。 因此，总和中的一个将呈现相关峰值，这表示代码的期望相位被包括在该特定和中。 其他总和将不会呈现相关峰值，并被丢弃。 显示相关性的一个和中的不同相位被分成新的和，每个相位具有较少的相位，并且再次执行相关性。 再次，表示没有相关性的那些和被丢弃，并且显示相关性的和被划分为较少代码的和。

    Scalable spread-spectrum signal detection and acquisition processor
    5.
    发明授权
    Scalable spread-spectrum signal detection and acquisition processor 有权
    可扩展扩频信号检测和采集处理器

    公开(公告)号：US06621855B1

    公开(公告)日：2003-09-16

    申请号：US09318853

    申请日：1999-05-26

    申请人： Nick Andrew Van Stralen ,  Richard August Korkosz ,  Gary Jude Saulnier ,  John Erik Hershey ,  Naofal Mohammed Wassel Al-Dhahir

    发明人： Nick Andrew Van Stralen ,  Richard August Korkosz ,  Gary Jude Saulnier ,  John Erik Hershey ,  Naofal Mohammed Wassel Al-Dhahir

    IPC分类号： H04B169

    CPC分类号： H04B1/70752 ,  H04B1/708

    摘要： A method allows determination of the presence of, the frequency of, and or the timing of a coded signal distributed in time, as for example a direct-sequence spread-spectrum signal or a signal having a coded header. According to the method, the received signal is correlated (16, 216, 316) with small sections of the spreading or header code, to produce partial correlations, as for example a 1024-chip spreading code is correlated in eight- or sixteen-chip portions. The result of each partial correlation is delayed (32, 232, 332/350) by an amount which results in temporal congruence or simultaneous occurrence of the partial correlations at a Doppler processor. The processor processes the simultaneous partial correlations, to produce signals which recur in the appropriate frequency bin at the recurrence rate of the spreading code. The frequency bin identifies the frequency of the received signals, and the time of the appearance of the signals at the bins is indicative of the time.

    摘要翻译： 一种方法允许确定在时间上分布的编码信号的存在，频率和/或定时，例如直接序列扩频信号或具有编码报头的信号。 根据该方法，接收信号与扩展或报头代码的小部分相关（16,216,316），以产生部分相关性，例如1024个码片扩展码在八或十六个芯片中相关 部分。 每个部分相关的结果被延迟（32,232,332/350）一个量，这导致在多普勒处理器处的部分相关性的时间一致性或同时发生。 处理器处理同时的部分相关，以产生以扩展码的复现速率在适当频率仓中重复的信号。 频率仓识别接收到的信号的频率，并且信号在信息箱出现的时间表示时间。

    GHM aggregator
    7.
    发明授权
    GHM aggregator 有权
    GHM聚合器

    公开(公告)号：US06346875B1

    公开(公告)日：2002-02-12

    申请号：US09476821

    申请日：2000-01-03

    申请人： Charles McDonald Puckette ,  Gary Jude Saulnier ,  Richard August Korkosz ,  John Erik Hershey

    发明人： Charles McDonald Puckette ,  Gary Jude Saulnier ,  Richard August Korkosz ,  John Erik Hershey

    IPC分类号： H04M1104

    CPC分类号： H04B3/54 ,  H04B2203/5416 ,  H04B2203/5433 ,  H04B2203/5441 ,  H04B2203/5483

    摘要： The invention provides an aggregator for use in connection with a power distribution network including a power line. The aggregator comprises a receiver, a controller, and a data outbound link. The receiver is coupled to the power line and is configured to receive signals comprising messages, for example geometric harmonic modulation (GHM) signals, from the power line. The controller is coupled to the receiver and to the data outbound link. The controller is configured to provide messages received by the receiver to the data outbound link for transmission by radio frequency energy to a destination, for example a power control station.

    摘要翻译： 本发明提供了一种用于与包括电力线的配电网络结合使用的聚合器。 聚合器包括接收器，控制器和数据出站链路。 接收器耦合到电力线并且被配置为从电力线接收包括消息的信号，例如几何谐波调制（GHM）信号。 控制器耦合到接收器和数据出站链路。 控制器被配置为将接收器接收的消息提供给数据出站链路，以通过射频能量传送到目的地，例如功率控制站。

    Digital receiving system for dense environment of aircraft
    9.
    发明授权
    Digital receiving system for dense environment of aircraft 有权
    飞机密集环境数字接收系统

    公开(公告)号：US06792058B1

    公开(公告)日：2004-09-14

    申请号：US09614776

    申请日：2000-07-12

    申请人： John Erik Hershey ,  Ralph Thomas Hoctor ,  Richard August Korkosz ,  Charles McDonald Puckette, IV

    发明人： John Erik Hershey ,  Ralph Thomas Hoctor ,  Richard August Korkosz ,  Charles McDonald Puckette, IV

    IPC分类号： H04L102

    CPC分类号： G01S13/782

    摘要： The capacity of a Mode-S ADS-B surveillance radar system is increased by sectorizing the radar system by the use of a directional array of Mode-S, quarter wavelength, single element, stub antennas. The ensemble of signals from the array of Mode-S antenna elements is processed electronically. The signal processing/receiver architecture increases the capacity of the Mode-S ADS-B system to be capable of effectively functioning within a highly congested airspace.

    摘要翻译： 通过使用Mode-S，四分之一波长，单个元件，短截线天线的方向阵列对雷达系统进行分区，来增加Mode-S ADS-B监视雷达系统的容量。 来自Mode-S天线元件阵列的信号的集合是以电子方式处理的。 信号处理/接收机架构增加了Mode-S ADS-B系统能够在高度拥挤的空域内有效运行的能力。

    System and method for directing an adaptive antenna array
    10.
    发明授权
    System and method for directing an adaptive antenna array 有权
    用于引导自适应天线阵列的系统和方法

    公开(公告)号：US06275187B1

    公开(公告)日：2001-08-14

    申请号：US09227371

    申请日：1999-01-08

    申请人： John Anderson Fergus Ross ,  John Erik Hershey ,  Richard August Korkosz ,  Naofal Mohammed Wassel Al-Dhahir

    发明人： John Anderson Fergus Ross ,  John Erik Hershey ,  Richard August Korkosz ,  Naofal Mohammed Wassel Al-Dhahir

    IPC分类号： H01Q322

    CPC分类号： G08C15/12 ,  G08C17/02 ,  H01Q1/241 ,  H01Q1/246 ,  H01Q1/28 ,  H01Q1/32 ,  H01Q1/3233 ,  H01Q3/2605 ,  H04B7/18502 ,  H04B7/18506

    摘要： A system for directing a receiving lobe of an adaptive antenna array toward an aircraft in flight includes an aircraft position vector calculator and an antenna weight vector generator. The aircraft position vector calculator receives aircraft position information from an aircraft tracking service and calculates, based upon the aircraft position information it receives, an aircraft position vector g. An antenna weight vector generator receives the aircraft position vector g from the aircraft position vector calculator and generates, based upon the aircraft position vector g, an antenna element weight vector w. The antenna weight vector w is applied to the elements of an adaptive antenna array to direct a receiving lobe of the array towards an aircraft in flight.

    摘要翻译： 用于将自适应天线阵列的接收波瓣引导到飞行中的飞行器的系统包括飞行器位置矢量计算器和天线加权矢量发生器。 飞行器位置矢量计算器从飞机跟踪服务器接收飞机位置信息，并且基于其接收到的飞行器位置信息来计算飞行器位置矢量g。 天线权重向量生成器从飞行器位置矢量计算器接收飞机位置矢量g，并且基于飞机位置向量g生成天线元重量向量w。 天线权重向量w被施加到自适应天线阵列的元件，以将阵列的接收波瓣引向飞行中的飞行器。