公开(公告)号：US6101214A

公开(公告)日：2000-08-08

申请号：US845867

申请日：1997-04-28

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

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

IPC分类号： H04B1/69 ,  H04B3/54 ,  H04B15/00 ,  H04K1/00 ,  H04L27/30 ,  H04M11/04

CPC分类号： H04B1/69 ,  H04B3/54 ,  H04B2203/5416

摘要： A system for spread spectrum power line communications employs a harmonic modulation (HM) transmitter coupled to the power line for transmitting message bits to an HM receiver. The spread spectrum accommodates a plurality of HM transmitters simultaneously occupying the same bandwidth. The spectrum of HM, in a frequency range above 60 Hz but below the maximum frequency that will carry through a distribution transformer, is ideal in combating carrier synchronous noise since it can be interleaved with the noise harmonics and therefore be effectively spectrally disjoint with the synchronous noise process spectrum.

摘要翻译： 用于扩频电力线通信的系统采用耦合到电力线的谐波调制（HM）发射机，用于向HM接收机发送消息比特。 扩展频谱容纳多个同时占据相同带宽的HM发射机。 在频率范围高于60Hz但低于将通过配电变压器进行的最大频率的HM的频谱是对付载波同步噪声的理想选择，因为它可以与噪声谐波进行交织，并且因此与同步信号有效地频谱分离 噪声过程谱。

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。

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。

公开(公告)号：US06522243B1

公开(公告)日：2003-02-18

申请号：US09892358

申请日：2001-06-28

申请人： Gary Jude Saulnier ,  Ralph Thomas Hoctor ,  John Erik Hershey ,  Richard Charles Gaus, Jr.

发明人： Gary Jude Saulnier ,  Ralph Thomas Hoctor ,  John Erik Hershey ,  Richard Charles Gaus, Jr.

IPC分类号： H04M1104

CPC分类号： H04B3/542 ,  H04B2203/5416 ,  H04L12/2803 ,  H04L2012/2843

摘要： A communication system includes a transmitter configured to pulse shape a GHM signal to confine the frequency spectrum of the GHM signal within a predefined frequency range. A receiver is also included that receives the transmitted GHM signal. The receiver includes a processor for maximizing the GHM signal to noise ratio and minimizing the bit error rate. The GHM signals are also synchronized to establish a relative time for correct interpretation of bit positions.

摘要翻译： 通信系统包括：发射机，被配置为脉冲形成GHM信号，以将GHM信号的频谱限制在预定义的频率范围内。 还包括接收发送的GHM信号的接收机。 接收机包括用于使GHM信噪比最大化并使误码率最小化的处理器。 GHM信号也被同步，以建立相对时间来正确解释位位置。

公开(公告)号：US06943668B2

公开(公告)日：2005-09-13

申请号：US09681920

申请日：2001-06-26

申请人： Richard Charles Gaus, Jr. ,  Nick Andrew Van Stralen ,  John Erik Hershey

发明人： Richard Charles Gaus, Jr. ,  Nick Andrew Van Stralen ,  John Erik Hershey

IPC分类号： H04B3/54 ,  H04M11/04

CPC分类号： H04B3/546 ,  H04B2203/5412 ,  H04B2203/5433

摘要： A geometric harmonic modulation (GHM) communication system communicates GHM signals on a power line of a reconfigurable network. The GHM communication system includes a master controller connected to the power line for transmitting GHM signals on the power line. A boundary component is also connected to the power line. A GHM addressable device is connected to the power line between the master controller and the boundary component. The GHM addressable device defines a boundary of a network region based on the GHM signals transmitted over the power line.

摘要翻译： 几何谐波调制（GHM）通信系统在可重构网络的电力线上传送GHM信号。 GHM通信系统包括连接到电力线的主控制器，用于在电力线上发送GHM信号。 边界部件也连接到电源线。 GHM可寻址设备连接到主控制器和边界部件之间的电源线。 GHM可寻址设备基于通过电力线传输的GHM信号来定义网络区域的边界。