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    PN generators for spread spectrum communications systems
    1.
    发明授权
    PN generators for spread spectrum communications systems 有权
    用于扩频通信系统的PN发生器

    公开(公告)号：US06661833B1

    公开(公告)日：2003-12-09

    申请号：US09494838

    申请日：2000-01-31

    申请人： Peter J. Black ,  Roberto Padovani ,  Lindsay A. Weaver, Jr.

    发明人： Peter J. Black ,  Roberto Padovani ,  Lindsay A. Weaver, Jr.

    IPC分类号： H04B169

    CPC分类号： H04J13/10 ,  H03K3/84 ,  H04B1/707 ,  H04J13/0022

    摘要： Techniques to improve the acquisition process in a spread spectrum environment. The signals from different CDMA systems are spread with different sets of PN sequences, with the PN sequences in each set being uncorrelated to the PN sequences in the other sets. By using uncorrelated PN sequences, the likelihood of detecting a pilot signal from an undesired system is reduced or minimized, and the mean time to acquisition of the pilot signal from the desired system is improved. The mobile station can attempt to acquire the pilot signal by processing the received signal with a first set of PN sequences corresponding to a first hypothesis of the particular signal being acquired. If acquisition of the pilot signal fails, a second set of PN sequences corresponding to a second hypothesis is selected and used to process the received signal. The PN sequences in the second set are uncorrelated to the PN sequences in the first set. The PN sequences for the first set can be generated based on the characteristic polynomials defined by IS-95-A, and the PN sequences for the second set can be the reverse of the PN sequences for the first set.

    摘要翻译： 在扩展频谱环境中改进采集过程的技术。 来自不同CDMA系统的信号用不同的PN序列集合扩展，每组中的PN序列与其他集合中的PN序列不相关。 通过使用不相关的PN序列，可以减少或最小化检测来自不需要的系统的导频信号的可能性，并且提高从所需系统获取导频信号的平均时间。 移动台可以尝试通过用对应于所获取的特定信号的第一假设的第一组PN序列处理接收信号来获取导频信号。 如果导频信号的获取失败，则选择对应于第二假设的第二组PN序列来处理接收到的信号。 第二组中的PN序列与第一组中的PN序列不相关。 可以基于由IS-95-A定义的特征多项式来生成第一组的PN序列，并且第二组的PN序列可以是第一组的PN序列的相反。

    PN generators for spread spectrum communications systems
    2.
    发明授权
    PN generators for spread spectrum communications systems 有权
    用于扩频通信系统的PN发生器

    公开(公告)号：US08611310B2

    公开(公告)日：2013-12-17

    申请号：US10659831

    申请日：2003-09-10

    申请人： Peter J. Black ,  Roberto Padovani ,  Lindsay A. Weaver, Jr.

    发明人： Peter J. Black ,  Roberto Padovani ,  Lindsay A. Weaver, Jr.

    IPC分类号： H04B7/216 ,  H04B1/69

    CPC分类号： H04J13/10 ,  H03K3/84 ,  H04B1/707 ,  H04J13/0022

    摘要： Techniques to improve the acquisition process in a spread spectrum environment. The signals from different CDMA systems are spread with different sets of PN sequences, with the PN sequences in each set being uncorrelated to the PN sequences in the other sets. The mobile station can attempt to acquire the pilot signal by processing the received signal with a first set of PN sequences corresponding to a first hypothesis of the particular signal being acquired. If acquisition of the pilot signal fails, a second set of PN sequences corresponding to a second hypothesis is selected and used to process the received signal. The PN sequences in the second set are uncorrelated to the PN sequences in the first set.

    摘要翻译： 在扩展频谱环境中改进采集过程的技术。 来自不同CDMA系统的信号用不同的PN序列集合扩展，每组中的PN序列与其他集合中的PN序列不相关。 移动台可以尝试通过用对应于所获取的特定信号的第一假设的第一组PN序列处理接收信号来获取导频信号。 如果导频信号的获取失败，则选择对应于第二假设的第二组PN序列来处理接收到的信号。 第二组中的PN序列与第一组中的PN序列不相关。

    Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system
    3.
    发明授权
    Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system 失效
    用于减少在CDMA蜂窝通信系统中同时访问基站的移动站之间的消息冲突的装置和方法

    公开(公告)号：US07734260B2

    公开(公告)日：2010-06-08

    申请号：US11622383

    申请日：2007-01-11

    申请人： Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Roberto Padovani

    发明人： Edward G. Tiedemann, Jr. ,  Lindsay A. Weaver, Jr. ,  Roberto Padovani

    IPC分类号： H04B1/04

    CPC分类号： H04W74/0841 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/2628 ,  H04B2201/709709 ,  H04J13/0022 ,  H04J13/10 ,  H04J13/16 ,  H04L1/188 ,  H04L1/1887 ,  H04W52/48 ,  H04W52/50 ,  H04W74/002 ,  H04W74/08 ,  H04W74/0833 ,  H04W74/0866

    摘要： Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station in a CDMA system uses one or more randomization methods to distribute its transmissions. In the first randomization, the mobile station time-delays its transmissions by a number of chips of the PN code with which it spreads the transmitted signal. In a second randomization, the mobile station randomly selects the PN code. In a third randomization, the mobile station inserts a random delay between successive message transmissions or probes if it does not receive an acknowledgement after a predetermined timeout period. A predetermined number of such transmissions is called a probe sequence. In a fourth randomization, the mobile station inserts a relatively long random delay between successive probe sequences if it does not receive an acknowledgement of any probe in the sequence.

    摘要翻译： 通过在接收机的可用资源上分发传输来减少由多个扩频发射机同时发送的消息之间的冲突。 CDMA系统中的每个移动站使用一种或多种随机化方法来分发其传输。 在第一次随机化中，移动台通过PN码的多个码片对其发送进行时间延迟，并通过该芯片扩展发送的信号。 在第二随机化中，移动台随机选择PN码。 在第三次随机化中，如果移动台在预定的超时时段之后没有接收到确认，则在连续的消息传输或探测之间插入随机延迟。 预定数量的这种传输被称为探测序列。 在第四随机化中，如果移动台在序列中没有接收到任何探测器的确认，则在连续探测序列之间插入相对长的随机延迟。

    Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system
    7.
    发明授权
    Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system 失效
    用于控制CDMA蜂窝移动电话系统中的发射功率的方法和装置

    公开(公告)号：US5485486A

    公开(公告)日：1996-01-16

    申请号：US217003

    申请日：1994-03-23

    申请人： Klein S. Gilhousen ,  Roberto Padovani ,  Lindsay A. Weaver, Jr.

    发明人： Klein S. Gilhousen ,  Roberto Padovani ,  Lindsay A. Weaver, Jr.

    IPC分类号： H04B7/005 ,  H04B7/26 ,  H04W52/00 ,  H04W52/02 ,  H04W52/06 ,  H04W52/08 ,  H04W52/10 ,  H04W52/12 ,  H04W52/34 ,  H04W52/36 ,  H04W52/40 ,  H04W52/52 ,  H04J13/02 ,  H04B1/69 ,  H04B1/707 ,  H04J13/04

    CPC分类号： H04W52/343 ,  H04B7/2628 ,  H04W52/06 ,  H04W52/346 ,  H04W52/362 ,  H04W52/367 ,  H04W52/52 ,  H04W52/08 ,  H04W52/10 ,  H04W52/12 ,  H04W52/40

    摘要： A power control system for a cellular mobile telephone system in which system users communicate information signals between one another via at least one cell site using code division multiple access spread spectrum communication signals. The power control system controls transmission signal power for each cellular mobile telephone in the cellular mobile telephone system wherein each cellular mobile telephone has an antenna, transmitter and receiver and each cell-site also has an antenna, transmitter and receiver. Cell-site transmitted signal power is measured as received at the mobile unit. Transmitter power is adjusted at the mobile unit in an opposite manner with respect to increases and decreases in received signal power. A power control feedback scheme may also be utilized. At the cell-site communicating with the mobile unit, the mobile unit transmitted power is measured as received at the cell-site. A command signal is generated at the cell-site and transmitted to the mobile unit for further adjusting mobile unit transmitter power corresponding to deviations in the cell site received signal power. The feedback scheme is used to further adjust the mobile unit transmitter power so that mobile unit transmitted signals arrive at the cell-site at a desired power level. In a cell diversity situation, the mobile units transmitter power is adjusted to prevent unnecessary increases in mobile unit transmitter power level.

    摘要翻译： 一种用于蜂窝移动电话系统的功率控制系统，其中系统用户通过使用码分多址扩频通信信号的至少一个小区站点在彼此之间传送信息信号。 功率控制系统控制蜂窝移动电话系统中的每个蜂窝移动电话的传输信号功率，其中每个蜂窝移动电话具有天线，发射机和接收机，并且每个小区站点也具有天线，发射机和接收机。 在移动单元处测量接收到的站点发送信号功率。 相对于接收信号功率的增加和减少，发射机功率在移动单元处以相反的方式被调整。 还可以使用功率控制反馈方案。 在与移动单元通信的小区站点处，移动单元发送的功率在小区站点被接收到。 在小区站点生成指令信号，发送给移动单元，进一步调整与单元现场接收信号功率的偏差对应的移动单元发射机功率。 反馈方案用于进一步调整移动单元发射机功率，使得移动单元发送的信号以期望的功率电平到达小区站点。 在小区分集情况下，调整移动单元发射机功率以防止移动单元发射机功率电平的不必要的增加。

    Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system
    10.
    发明授权
    Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system 失效
    用于控制CDMA蜂窝移动电话系统中的发射功率的方法和装置

    公开(公告)号：US5265119A

    公开(公告)日：1993-11-23

    申请号：US702029

    申请日：1991-05-17

    申请人： Klein S. Gilhousen ,  Roberto Padovani ,  Charles E. Wheatley, III ,  Lindsay A. Weaver, Jr. ,  Robert D. Blakeney, II

    发明人： Klein S. Gilhousen ,  Roberto Padovani ,  Charles E. Wheatley, III ,  Lindsay A. Weaver, Jr. ,  Robert D. Blakeney, II

    IPC分类号： H04J13/00 ,  H04B7/005 ,  H04B7/26 ,  H04L27/30 ,  H04W52/00 ,  H04W52/02 ,  H04W52/06 ,  H04W52/08 ,  H04W52/10 ,  H04W52/12 ,  H04W52/34 ,  H04W52/36 ,  H04W52/40 ,  H04W52/52 ,  H04B7/204

    CPC分类号： H04W52/40 ,  H04B7/0671 ,  H04B7/2628 ,  H04W52/0245 ,  H04W52/06 ,  H04W52/08 ,  H04W52/10 ,  Y02B60/50

    摘要： A power control system for a cellular mobile telephone system in which system users communicate information signals between one another via at least one cell site using code division multiple access spread spectrum communication signals. The power control system controls transmission signal power for each cellular mobile telephone in the cellular mobile telephone system wherein each cellular mobile telephone has an antenna, transmitter and receiver and each cell-site also has an antenna, transmitter and receiver. Cell-site transmitted signal power is measured as received at the mobile unit. Transmitter power is adjusted at the mobile unit in an opposite manner with respect to increases and decreases in received signal power. A power control feedback scheme may also be utilized. At the cell-site communicating with the mobile unit, the mobile unit transmitted power is measured as received at the cell-site. A command signal is generated at the cell-site and transmitted to the mobile unit for further adjusting mobile unit transmitter power corresponding to deviations in the cell site received signal power. The feedback scheme is used to further adjust the mobile unit transmitter power so that mobile unit transmitted signals arrive at the cell-site at a desired power level. In a cell diversity situation, the mobile units transmitter power is adjusted to prevent unnecessary increases in mobile unit transmitter power level.

    摘要翻译： 一种用于蜂窝移动电话系统的功率控制系统，其中系统用户通过使用码分多址扩频通信信号的至少一个小区站点在彼此之间传送信息信号。 功率控制系统控制蜂窝移动电话系统中的每个蜂窝移动电话的传输信号功率，其中每个蜂窝移动电话具有天线，发射机和接收机，并且每个小区站点也具有天线，发射机和接收机。 在移动单元处测量接收到的站点发送信号功率。 相对于接收信号功率的增加和减少，发射机功率在移动单元处以相反的方式被调整。 还可以使用功率控制反馈方案。 在与移动单元通信的小区站点处，移动单元发送的功率在小区站点被接收到。 在小区站点生成指令信号，发送给移动单元，进一步调整与单元现场接收信号功率的偏差对应的移动单元发射机功率。 反馈方案用于进一步调整移动单元发射机功率，使得移动单元发送的信号以期望的功率电平到达小区站点。 在小区分集情况下，调整移动单元发射机功率以防止移动单元发射机功率电平的不必要的增加。