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    • 13. 发明授权
    • Control circuit for multiple battery systems with capacity gauge on end equipment
    • 多功能电池系统的控制电路,带终端设备的电量计
    • US06650089B1
    • 2003-11-18
    • US10272110
    • 2002-10-16
    • David FreemanJose Antonio Vieira Formenti
    • David FreemanJose Antonio Vieira Formenti
    • H02J700
    • H02J7/0047
    • A capacity gauge is provided that measures a selected battery capacity of a plurality of batteries in a multiple battery system. A capacity gauge and a battery current sense resistor reside on the end equipment, while the battery pack contains minimal information associated with the battery pack. Control circuits provide for proper pack selection and pack connection timing, as well as capacity gauge synchronization. Power up/down circuits provide power to control logic, the selection circuits and capacity gauge at power up, power down and battery pack removal. The system is powered by a selected battery pack after the battery pack selection is executed, and the selected battery pack monitored by the capacity gauge.
    • 提供了测量多电池系统中的多个电池的选定电池容量的容量计。 容量计和电池电流检测电阻位于终端设备上,而电池组包含与电池组相关的最少信息。 控制电路提供适当的包装选择和包装连接时间以及容量计同步。 上电/下电电路为控制逻辑提供电源,上电,断电和电池组移除时的选择电路和容量计。 在执行电池组选择后,系统由选定的电池组供电,并且所选择的电池组由容量计监控。
    • 14. 发明授权
    • Method and system for modeling a radio communications network
    • 无线电通信网络建模方法和系统
    • US06408185B1
    • 2002-06-18
    • US09534903
    • 2000-03-23
    • David FreemanPete A. BoyerPablo Vicharelli
    • David FreemanPete A. BoyerPablo Vicharelli
    • H04B700
    • H04W16/18
    • In a radio communications network (20) having a plurality of cells (34) employing a plurality of cell site configurations (22, 24, 26, 28, 30, and 32), a computing system (116) and a computer-based method (178) create a hierarchical data structure (136) modeling the radio communications network (20). The hierarchical data structure (136) is created using object oriented programming methodology to create objects, representing the various physical components of a cell site. In addition, objects are created to represent the auxiliary information, such as available channels, channel assignment constraints, carrier-to-interference ratios, and neighbors lists under which a particular radio communications network configuration is devised.
    • 在具有采用多个小区站点配置(22,24,26,38和32)的多个小区(34)的无线电通信网络(20)中,计算系统(116)和基于计算机的方法 (178)创建对无线电通信网络(20)建模的分级数据结构(136)。 使用面向对象的编程方法创建层次数据结构(136),以创建表示小区站点的各种物理组件的对象。 此外,创建对象以表示辅助信息,例如可用信道,信道分配约束,载波干扰比和设计特定无线电通信网络配置的邻居列表。
    • 20. 发明授权
    • Method and system for characterizing propagation of radiofrequency signal
    • 表征射频信号传播的方法和系统
    • US06487417B1
    • 2002-11-26
    • US09448956
    • 1999-11-24
    • Philip G. RossoniPablo VicharelliPete A. BoyerDavid Freeman
    • Philip G. RossoniPablo VicharelliPete A. BoyerDavid Freeman
    • H04Q720
    • H04W16/00
    • A method, executed on a simulation system (20), characterizes propagation of a radiofrequency signal (56) in a three-dimensional environment (52). The method includes forming a database (42) of propagation paths (54) of the radiofrequency signal (56) transmitted from a transmitter (58) at a fixed location (66) in the three-dimensional environment (52). The propagation paths (54) are represented by a plurality of line segments (120, 122) in the database (42). Local line segments (188) are selected from the plurality of line segments (120, 122) to establish a subset (47) of the propagation paths (54). The subset (47) includes those propagation paths (54) each having one of the local line segments (188) proximate a location (182) of a receiver (72) in the environment (52). Distinct multipath components (246) representing distinct wavefronts of the radiofrequency signal (56) are subsequently identified from the subset (47) of the propagation paths (54).
    • 在模拟系统(20)上执行的方法表征了三维环境中的射频信号(56)的传播(52)。 该方法包括形成从三维环境(52)中的固定位置(66)处的发射器(58)发送的射频信号(56)的传播路径(54)的数据库(42)。 传播路径(54)由数据库(42)中的多个线段(120,122)表示。 从多个线段(120,122)中选择局部线段(188)以建立传播路径(54)的子集(47)。 子集(47)包括每个具有邻近环境(52)中的接收器(72)的位置(182)的本地线段(188)之一的那些传播路径(54)。 随后从传播路径(54)的子集(47)识别表示射频信号(56)的不同波前的不同的多路径分量(246)。