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11. 发明授权

US6006071A RF communications system operable in the presence of a repetitive interference source and related methods 失效
标题翻译： RF通信系统在存在重复干扰源和相关方法的情况下可操作
公开(公告)号：US6006071A
公开(公告)日：1999-12-21
申请号：US6071
申请日：1998-01-12
申请人： Richard D. Roberts , George R. Nelson
发明人： Richard D. Roberts , George R. Nelson
IPC分类号： G06F20060101 , H04B20060101 , H04B1/00 , H04B1/10 , H04B7/00 , H04B15/02 , H04B15/04 , H04L1/08 , H04Q7/00
CPC分类号： H04B15/00
摘要： An RF communication system is for operating in the presence of a repetitive RF interference source powered from an Alternating Current (AC) power line. The system uses redundant transmission synchronized to the power line to ensure accurate reception by at least one second device. The RF communication system includes a first device powered from an AC power line which also powers the repetitive RF interference source. The first device, in turn, preferably includes an RF transmitter for transmitting in a frequency band of the repetitive RF interference source, a power line sensor, and a data transmit controller. The data transmit controller generates a plurality of data packets with each data packet including an error detecting portion. The data transmit controller also operates the RF transmitter to produce repetitive first and second transmissions of a same data packet responsive to the power line sensor. Accordingly, at least one of the first and second transmissions occurs during an OFF period of the repetitive RF interference source. The second device also preferably includes a data receive controller for receiving the repetitive first and second transmissions of same data packets and selecting one based upon the error detecting portions thereof to thereby avoid interference from the repetitive RF interference source.
摘要翻译： RF通信系统用于在由交流（AC）电力线供电的重复RF干扰源的存在下操作。该系统使用与电力线同步的冗余传输，以确保至少一个第二设备的准确接收。 RF通信系统包括由交流电源线供电的第一设备，其也为重复RF干扰源供电。第一装置又优选地包括用于在重复RF干扰源的频带中传输的RF发射机，电力线传感器和数据发射控制器。数据发送控制器生成多个数据分组，每个数据分组包括错误检测部分。数据传输控制器还操作RF发射机以响应于电力线传感器产生相同数据分组的重复的第一和第二传输。因此，第一和第二传输中的至少一个发生在重复RF干扰源的OFF周期期间。第二设备还优选地包括数据接收控制器，用于接收相同数据分组的重复的第一和第二传输，并且基于其错误检测部分来选择一个，从而避免来自重复RF干扰源的干扰。

12. 发明授权

US3981618A Method and apparatus for preventing pump cavitation 失效
标题翻译：防止泵气蚀的方法和装置
公开(公告)号：US3981618A
公开(公告)日：1976-09-21
申请号：US550042
申请日：1975-02-14
申请人： George R. Nelson, Jr.
发明人： George R. Nelson, Jr.
IPC分类号： F02B1/04 , F02D29/04 , F04B49/06 , F04B49/10 , F04B49/20 , F04B49/08
CPC分类号： F04B49/20 , F02D29/04 , F04B49/06 , F04B49/103 , F02B1/04
摘要： The speed of an engine driven pump is sensed and compared with the desired maximum operating speed to detect overspeed. The discharge of the pump is controlled by a variable flow rate controller. When an overspeed condition exists, a command signal is sent to the discharge controller to reduce flow by a discrete decrement. The control signal is blocked after activating the controller for a preselected time interval. During the blocking interval the engine speed is maintained substantially at the operating speed by cyclical reduction of the power input thereto.
摘要翻译：发动机驱动的泵的速度被感测并与期望的最大运行速度进行比较以检测超速。泵的排放由可变流量控制器控制。当存在超速状态时，将命令信号发送到排放控制器以通过离散减量来减少流量。在控制器激活预选的时间间隔后，控制信号被阻塞。在阻塞间隔期间，通过对其输入的功率的循环减小，发动机速度基本维持在操作速度。

13. 发明申请

US20080225991A1 Method for searching pilot signals to synchronize a CDMA receiver with an associated transmitter 有权
标题翻译：用于搜索导频信号以使CDMA接收机与相关联的发射机同步的方法
公开(公告)号：US20080225991A1
公开(公告)日：2008-09-18
申请号：US11818293
申请日：2007-06-14
申请人： James A. Proctor , Antoine J. Rouphael , John E. Hoffmann , George R. Nelson
发明人： James A. Proctor , Antoine J. Rouphael , John E. Hoffmann , George R. Nelson
IPC分类号： H04L1/02
CPC分类号： H04W56/001 , H04B1/7075 , H04B1/70775 , H04B1/7103 , H04B7/086 , H04B2201/70701 , H04L27/2273 , H04L2027/0057 , H04L2027/0087
摘要： A method for synchronizing a CDMA receiver to a transmitter when an adaptive antenna is utilized to receive transmitted data, wherein a receiving antenna system is adapted between a 360° reception angle pattern (i.e., an omni-directional pattern) and a fixed reception angle (i.e., a directional pattern) by permitting the receiver to identify a pilot signal having the largest magnitude. The receiver minimizes interference from other pilot signals by steering antenna pattern nulls toward other transmitters. As a result, the time required for the receiver to acquire a valid pilot signal is significantly reduced.
摘要翻译：一种当使用自适应天线来接收发射数据时将CDMA接收机同步到发射机的方法，其中接收天线系统适应于360°接收角度模式（即，全向模式）和固定接收角度即，方向图），通过允许接收机识别具有最大幅度的导频信号。接收器通过向其他发射机转向天线图形零点来最小化来自其他导频信号的干扰。结果，接收机获取有效导频信号所需的时间显着减少。

14. 发明授权

US06233273B1 Rake receiver with embedded decision feedback equalizer 有权
标题翻译：耙式接收机具有嵌入式判决反馈均衡器
公开(公告)号：US06233273B1
公开(公告)日：2001-05-15
申请号：US09342583
申请日：1999-06-29
申请人： Mark A. Webster , George R. Nelson , Karen W. Halford , Carl F. Andren
发明人： Mark A. Webster , George R. Nelson , Karen W. Halford , Carl F. Andren
IPC分类号： H04B1500
CPC分类号： H04B1/7105 , H04B1/7093 , H04B1/7115 , H04L25/03057 , H04L2025/03375 , H04L2025/03401 , H04L2025/0349
摘要： The performance of a RAKE receiver for indoor multipath WLAN applications on direct sequence spread spectrum signals having relatively short codeword lengths is enhanced by embedding a decision feedback equalizer structure in the signal processing path through the receiver's channel matched filter and codeword correlator. The decision feedback equalizer serves to cancel both inter-codeword interference (ISI) or ‘bleed-over’ between codewords, and intra-codeword chip interference (ICI) or smearing of the energy within the chips of a respective codeword.
摘要翻译：通过在信号处理路径中通过接收机的信道匹配滤波器和码字相关器嵌入判决反馈均衡器结构，增强了具有相对短的码字长度的直接序列扩频信号上用于室内多路径WLAN应用的RAKE接收机的性能。判决反馈均衡器用于消除码字之间的码间干扰（ISI）或“渗漏”，以及相应码字的码片内的码内码片干扰（ICI）或能量的拖延。

15. 发明授权

US3974879A Method and apparatus for delivering constant water flow rates to a fire hose at each of a plurality of selectable flow rate settings 失效
标题翻译：用于在多个可选择的流量设置中的每一个处将消耗软管输送恒定的水流量的方法和装置
公开(公告)号：US3974879A
公开(公告)日：1976-08-17
申请号：US550044
申请日：1975-02-14
申请人： George R. Nelson, Jr. , Herman Kaplan
发明人： George R. Nelson, Jr. , Herman Kaplan
IPC分类号： A62C27/00
CPC分类号： A62C27/00
摘要： A method and apparatus for delivering constant water flow rates to the fire hose of a pumper truck at each of a plurality of selectable flow rate settings including the steps of transmitting a digital signal corresponding to a particular fire hose and pumper truck, receiving and decoding the digital signal, activating a multi-position valve in response to the decoded signal to set a particular valve position, and maintaining a constant flow rate to the fire hose by automatically varying the valve position in response to changes in the output pressure of the pump and pressure drop in the fire hose.
摘要翻译：一种用于在多个可选择的流量设置中的每一个处将稳定的水流量输送到泵送器的消防水管的方法和装置，包括以下步骤：发送对应于特定消防水带和泵车的数字信号，接收和解码数字信号，响应于解码的信号激活多位置阀，以设定特定的阀位置，并且通过响应于泵的输出压力的变化自动改变阀位置而将消耗软管保持恒定的流量，以及消防水带的压降。

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