Ultra-wideband communications system
    21.
    发明授权
    Ultra-wideband communications system 失效
    超宽带通信系统

    公开(公告)号:US06810087B2

    公开(公告)日:2004-10-26

    申请号:US09753443

    申请日:2001-01-03

    IPC分类号: H04L2700

    摘要: An ultra-wideband (UWB) communications system combines the techniques of a transmitted reference (TR) and a multiple access scheme called delay hopping (DH). Combining these two techniques using UWB signaling results in a penalty in signal-to-noise ratio (SNR) over conventional pulse position modulation (PPM) techniques but avoids the synchronization difficulties associated with conventional approaches. The signaling pulse waveforms are designed to insure that their power spectral densities, after any frequency translation to the center of an operating band, are essentially spectrally disjoint with frequencies that must be protected. This TR technique is combined with the DH multiple access technique to create a UWB communications scheme that has a greater multiple access capacity than does the UWB TR technique by itself.

    摘要翻译: 超宽带(UWB)通信系统结合了传输参考(TR)和称为延迟跳变(DH)的多址方案的技术。 结合使用UWB信令的这两种技术相比传统脉冲位置调制(PPM)技术导致信噪比(SNR)的损失,但是避免了与常规方法相关的同步困难。 信号脉冲波形被设计成确保在对工作频带的中心进行任何频率转换之后它们的功率谱密度与必须被保护的频率基本上是光谱不相交的。 这种TR技术与DH多址接入技术相结合,以创建具有比UWB TR技术本身更大的多接入容量的UWB通信方案。

    Optimization of television reception by selecting among or combining multiple antenna inputs
    22.
    发明授权
    Optimization of television reception by selecting among or combining multiple antenna inputs 有权
    通过选择或组合多个天线输入来优化电视接收

    公开(公告)号:US06577353B1

    公开(公告)日:2003-06-10

    申请号:US09422445

    申请日:1999-10-21

    IPC分类号: H04N500

    摘要: In a system for optimizing television reception by a television receiver receiving a diversity of input signals from a plurality of antennas, one of a plurality of combiners and television tuners selects the strongest combination of input signals for viewing and another scans the various combinations of input signals searching for a combination significantly stronger than the combination being viewed. A plurality of multiplexers selects the output signal of one combiner and transmits the selected signal to one of the tuners. A signal evaluation module evaluates the strength of the combinations of input signals and compares the strength of each combination of input signals to the strength of the viewing signal, looking for a superior signal. A control processor controls the combination of input signals selected by the combiners and the combiner output signal selected by the multiplexers. The control processor converts any superior signal found into the signal being viewed, at which time the process starts over and repeats.

    摘要翻译: 在用于通过接收来自多个天线的多种输入信号的电视接收机优化电视接收的系统中,多个组合器和电视调谐器中的一个选择用于观看的输入信号的最强组合,并且另外扫描输入信号的各种组合 寻找一种显着强于组合的组合。 多个复用器选择一个组合器的输出信号,并将所选择的信号发送到调谐器之一。 信号评估模块评估输入信号的组合的强度,并将输入信号的每个组合的强度与观看信号的强度进行比较,寻找优越的信号。 控制处理器控制由组合器选择的输入信号和由多路复用器选择的组合器输出信号的组合。 控制处理器将发现的任何优秀信号转换成正在观看的信号,此时该过程开始并重复。

    Receiver for detecting an amplitude modulated signal insinuated on an GHM signal
    23.
    发明授权
    Receiver for detecting an amplitude modulated signal insinuated on an GHM signal 有权
    用于检测在GHM信号上暗示的幅度调制信号的接收器

    公开(公告)号:US06430210B1

    公开(公告)日:2002-08-06

    申请号:US09285664

    申请日:1999-04-05

    IPC分类号: A61F206

    CPC分类号: H04L27/28

    摘要: A receiver for enabling one-way communications in a GHM network which does not interfere with or reduce the capability of the GHM network. The receiver detects a small modulation factor signal present on the GHM signal normally transmitted by the GHM transmitter. If the frequency of the modulated signal corresponds to a pre-defined frequency, then the receiver generates a command signal to, for example, a relay, annunciator, or other external device. More particularly, and in one embodiment, the receiver includes a filter which partially isolates the GHM energy from the lower 60 Hz harmonics. The receiver also includes a envelope detector coupled to filter. The envelope detector is coupled to a frequency detector. The frequency detector is coupled to a command decoder. The command decoder determines whether a plurality of AM modulation frequencies are present on the received signal. If the AM modulation signal is a specified frequency the decoder generates a signal which, in turn, causes signal generator to generate a command signal for transmission to an external device.

    摘要翻译: 用于在GHM网络中实现单向通信的接收机,其不干扰或降低GHM网络的能力。 接收机检测由GHM发射机正常发送的GHM信号上存在的小调制因子信号。 如果调制信号的频率对应于预先定义的频率,则接收机向例如继电器,信号器或其他外部设备产生命令信号。 更具体地,在一个实施例中,接收器包括将GHM能量与较低的60Hz谐波部分隔离的滤波器。 接收机还包括耦合到滤波器的包络检测器。 包络检测器耦合到频率检测器。 频率检测器耦合到命令解码器。 命令解码器确定接收信号上是否存在多个AM调制频率。 如果AM调制信号是指定频率,则解码器产生一个信号,该信号又使得信号发生器产生用于发送到外部设备的命令信号。

    Modulation of pilot tone amplitude in DTV broadcast for faster channel acquisition
    24.
    发明授权
    Modulation of pilot tone amplitude in DTV broadcast for faster channel acquisition 有权
    调制DTV广播中的导频音振幅,以实现更快的信道采集

    公开(公告)号:US06417890B1

    公开(公告)日:2002-07-09

    申请号:US09422442

    申请日:1999-10-21

    IPC分类号: H04N521

    CPC分类号: H04N5/211

    摘要: The existing ATSC broadcast standard is modified to improve both the speed at which the periodically transmitted training sequence is found after channel selection by a viewer and the speed at which synchronization is achieved to a continuous wideband overlay signal used for equalization of the decoded signal. The modification involves slight amplitude modulation of the pilot signal in a manner synchronized with the transmission of the training sequences. The modulation of the pilot signal is sufficiently small to be ignored by existing ATSC receivers; that is, it is backwards compatible. Properly equipped receivers can detect, more quickly than receivers not so equipped, transmission of the training sequence by decoding this pilot signal modulation, thereby being capable of providing a decoded image to a viewer more quickly after a channel change than a receiver not so equipped. Additionally, the time required to synchronize to a continuous wideband overlay signal which has been provided for equalization is reduced, as by varying the modulation slightly to correspond to the start of a particular phase portion of the periodic sequence such as an m-sequence used for the overlay.

    摘要翻译: 修改现有的ATSC广播标准,以改善观众频道选择之后发现周期性发送的训练序列的速度和实现同步的速度到用于解码信号的均衡的连续宽带覆盖信号。 该修改涉及以与训练序列的传输同步的方式对导频信号进行轻微的幅度调制。 导频信号的调制足够小,可以被现有的ATSC接收机忽略; 也就是说,它是向后兼容的。 正确配备的接收机可以比没有配备的接收机更快地检测到通过解码该导频信号调制的训练序列的传输,从而能够在频道改变之后更快地向观看者提供解码图像,而不是没有配备的接收机。 此外,与已经提供用于均衡的连续宽带覆盖信号同步所需的时间被减少,如通过稍微改变调制以对应于周期性序列的特定相位部分的开始,例如用于 覆盖层。

    Methods and systems for prioritizing data transferred on a Local Area Network
    25.
    发明授权
    Methods and systems for prioritizing data transferred on a Local Area Network 有权
    在局域网上传输数据的优先顺序的方法和系统

    公开(公告)号:US07548512B2

    公开(公告)日:2009-06-16

    申请号:US10358829

    申请日:2003-02-06

    IPC分类号: H04L12/26

    摘要: A method of prioritizing messages on a Local Area Network comprises receiving a digitized incoming message, comparing a message signature of the incoming message with a stored priority message signature, passing non-priority messages to a standard Ethernet protocol stack for processing, storing priority messages temporarily, preventing priority messages from being processed in the standard Ethernet protocol stack, and handling priority messages using a simplified protocol stack designed to process a specific data packet type. This method may be performed by an Application Specific Integrated Circuit (ASIC) inserted between an Ethernet PHY layer and Ethernet MAC layer on a Network Interface Card of a host device. In particular, automated machinery control systems using the Ethernet protocol for networking are intended to benefit from the prioritizing method and implementation.

    摘要翻译: 一种在局域网上对消息进行优先排序的方法包括接收数字化的进入消息,将传入消息的消息签名与存储的优先消息签名进行比较,将非优先级消息传递到标准以太网协议栈进行处理,临时存储优先消息 防止在标准以太网协议栈中处理优先级消息,以及使用被设计为处理特定数据分组类型的简化协议栈来处理优先级消息。 该方法可以由插入主机设备的网络接口卡上的以太网PHY层和以太网MAC层之间的专用集成电路(ASIC)来执行。 特别地,使用以太网协议进行网络化的自动机械控制系统旨在从优先级方法和实现中受益。

    Short range RF communication for jet engine control
    26.
    发明授权
    Short range RF communication for jet engine control 失效
    用于喷气发动机控制的短程射频通信

    公开(公告)号:US07236503B2

    公开(公告)日:2007-06-26

    申请号:US10082382

    申请日:2002-02-26

    IPC分类号: H04J3/12

    摘要: A method transmitting a message over at least one of a plurality of radio frequency (RF) channels of an RF communications network is provided. The method comprises the steps of detecting a presence of jamming pulses in the at least one of the plurality of RF channels. The characteristics of the jamming pulses in the at least one of the plurality of RF channels is determined wherein the determined characteristics define at least interstices between the jamming pulses. The message is transmitted over the at least one of the plurality of RF channels wherein the message is transmitted within the interstices of the jamming pulse determined from the step of determining characteristics of the jamming pulses.

    摘要翻译: 提供了通过RF通信网络的多个射频(RF)信道中的至少一个发送消息的方法。 该方法包括以下步骤:检测多个RF信道中的至少一个中的干扰脉冲的存在。 确定多个RF信道中的至少一个RF信道中的干扰脉冲的特性,其中所确定的特性至少限定干扰脉冲之间的间隙。 该消息通过多个RF信道中的至少一个发送,其中消息在从确定干扰脉冲的特性的步骤确定的干扰脉冲的间隙内传输。

    Systems and methods for short range RF communication
    27.
    发明授权
    Systems and methods for short range RF communication 失效
    短距离射频通信的系统和方法

    公开(公告)号:US08259753B2

    公开(公告)日:2012-09-04

    申请号:US11768684

    申请日:2007-06-26

    IPC分类号: H04J3/24

    摘要: A method transmitting a message over at least one of a plurality of channels of a communications network is provided. The method comprises the steps of detecting a presence of jamming pulses in the at least one of the plurality of channels. The characteristics of the jamming pulses in the at least one of the plurality of channels is determined wherein the determined characteristics define at least interstices between the jamming pulses. The message is transmitted over the at least one of the plurality of channels wherein the message is transmitted within the interstices of the jamming pulse determined from the step of determining characteristics of the jamming pulses.

    摘要翻译: 提供了一种通过通信网络的多个信道中的至少一个发送消息的方法。 该方法包括以下步骤:检测多个通道中的至少一个中的干扰脉冲的存在。 确定多个通道中的至少一个通道中的干扰脉冲的特性,其中确定的特性至少限定干扰脉冲之间的间隙。 该消息通过多个信道中的至少一个发送,其中消息在从确定干扰脉冲的特性的步骤确定的干扰脉冲的间隙内传送。

    SYSTEMS AND METHODS FOR SHORT RANGE RF COMMUNICATION
    28.
    发明申请
    SYSTEMS AND METHODS FOR SHORT RANGE RF COMMUNICATION 失效
    短距离通信系统与方法

    公开(公告)号:US20110038268A1

    公开(公告)日:2011-02-17

    申请号:US11768684

    申请日:2007-06-26

    IPC分类号: H04W24/00

    摘要: A method transmitting a message over at least one of a plurality of channels of a communications network is provided. The method comprises the steps of detecting a presence of jamming pulses in the at least one of the plurality of channels. The characteristics of the jamming pulses in the at least one of the plurality of channels is determined wherein the determined characteristics define at least interstices between the jamming pulses. The message is transmitted over the at least one of the plurality of channels wherein the message is transmitted within the interstices of the jamming pulse determined from the step of determining characteristics of the jamming pulses.

    摘要翻译: 提供了一种通过通信网络的多个信道中的至少一个发送消息的方法。 该方法包括以下步骤:检测多个通道中的至少一个中的干扰脉冲的存在。 确定多个通道中的至少一个通道中的干扰脉冲的特性,其中确定的特性至少限定干扰脉冲之间的间隙。 该消息通过多个信道中的至少一个发送,其中消息在从确定干扰脉冲的特性的步骤确定的干扰脉冲的间隙内传送。

    Instrumentation privacy methods and apparatuses
    30.
    发明授权
    Instrumentation privacy methods and apparatuses 有权
    仪器隐私方法和设备

    公开(公告)号:US07426272B2

    公开(公告)日:2008-09-16

    申请号:US10304407

    申请日:2002-11-26

    IPC分类号: H04L9/00

    CPC分类号: H04L9/0662 H04L2209/80

    摘要: The present invention provides methods and apparatuses for implementing communications privacy on a class of two-way wireless control communications. The methods and apparatuses of the present invention are cryptographic in nature and are built on a symmetric cryptographic algorithm structure. The cryptographic algorithm structure generates keytext on a frame-by-frame basis and both directions of the communications control link are served by the same keytext frames. The methods and apparatuses of the present invention utilize a single outbound/inbound cryptographic generator, such as a shrinking generator or the like designed using six-sigma tools in order to ensure, within a predetermined probability, that the non-fixed encryption time does not cause operational problems.

    摘要翻译: 本发明提供了用于实现一类双向无线控制通信的通信隐私的方法和装置。 本发明的方法和装置本质上是加密的,并且建立在对称密码算法结构上。 密码算法结构在逐帧的基础上产生密钥文本,通信控制链路的两个方向由相同的密钥文本帧服务。 本发明的方法和装置利用单个出站/入站加密发生器,例如使用六西格玛工具设计的收缩发生器等,以便在预定概率内确保非固定加密时间不 造成操作问题。