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    Time offset technique for increasing the capacity of a CDMA system
    82.
    发明授权
    Time offset technique for increasing the capacity of a CDMA system 失效
    用于增加CDMA系统容量的时间偏移技术

    公开(公告)号：US06965589B2

    公开(公告)日：2005-11-15

    申请号：US10084021

    申请日：2002-02-25

    Applicant: Stein A. Lundby ,  Edward G. Tiedemann, Jr. ,  Jack M. Holtzman ,  Daisuke Terasawa

    Inventor： Stein A. Lundby ,  Edward G. Tiedemann, Jr. ,  Jack M. Holtzman ,  Daisuke Terasawa

    IPC: H04B1/707 ,  H04B1/7097 ,  H04B7/005 ,  H04B7/216 ,  H04J13/00

    CPC classification number: H04B1/707 ,  H04B1/7097 ,  H04B2201/70701 ,  H04B2201/70706 ,  H04B2201/70709 ,  H04W52/30

    Abstract: The invention is a method for limiting the peak transmit power in a CDMA communication system including the steps transmitting a first communication signal having a first high transmit power region and transmitting a second communication signal having a second high transmit power region. One of the first and second communication signals is time offset to prevent the first and second high transmit power regions from occurring simultaneously. Time shifting only a portion of one of the first and second communications signals is also taught. The first and second communication signals can also include respective first and second low transmit power regions. The time offset can be selected to align one of the first and second high transmit power regions with one of the first and second low transmit power regions.

    Abstract translation: 本发明是一种用于限制CDMA通信系统中的峰值发射功率的方法，包括发送具有第一高发射功率区域的第一通信信号和发射具有第二高发射功率区域的第二通信信号的步骤。 第一和第二通信信号之一是时间偏移，以防止第一和第二高发射功率区域同时发生。 还教导了仅移动第一和第二通信信号之一的一部分的时移。 第一和第二通信信号还可以包括相应的第一和第二低发射功率区域。 可以选择时间偏移以使第一和第二高发射功率区域中的一个与第一和第二低发射功率区域中的一个对准。

    Method and system for generating higher order modulations with qpsk modulator
    85.
    发明申请
    Method and system for generating higher order modulations with qpsk modulator 有权
    用qpsk调制器产生高阶调制的方法和系统

    公开(公告)号：US20050089118A1

    公开(公告)日：2005-04-28

    申请号：US10499106

    申请日：2001-12-18

    Applicant: Hannu Hakkinen

    Inventor： Hannu Hakkinen

    IPC: H04B1/707 ,  H04L27/20 ,  H04L27/36 ,  H03C3/00

    CPC classification number: H04L27/2071 ,  H04B1/707 ,  H04B2201/70709 ,  H04L27/362

    Abstract: Method and system for generating higher order modulations with QPSK modulators. A complex sequence of binary digits is input to QPSK modulators. The binary digits are mapped to constellation points and multiplied with weighting coefficient. Constellation points of higher order modulation are mapped to inputs of the QPSK modulator, and, after modulation QPSK symbols are summed to compose symbols of higher order modulation.

    Abstract translation: 用QPSK调制器产生高阶调制的方法和系统。 将二进制数字的复杂序列输入到QPSK调制器。 二进制数字映射到星座点并与加权系数相乘。 将高阶调制的星座点映射到QPSK调制器的输入端，并且在调制QPSK符号相加以构成高阶调制的符号之后。

    Rapid signal acquisition by spread spectrum transceivers
    87.
    发明授权
    Rapid signal acquisition by spread spectrum transceivers 有权
    通过扩频收发器快速采集信号

    公开(公告)号：US06757323B1

    公开(公告)日：2004-06-29

    申请号：US09721116

    申请日：2000-11-22

    Applicant: Robert Alan Fleming ,  Cherie Elaine Kushner

    Inventor： Robert Alan Fleming ,  Cherie Elaine Kushner

    IPC: H04B1500

    CPC classification number: H04B1/70775 ,  H04B1/70755 ,  H04B2201/70701 ,  H04B2201/70709

    Abstract: Spread spectrum transceivers communicate using code sequences having low cross-correlations and well-peaked autocorrelations. The initial communications involve broadcasting a beacon signal consisting of a beacon packet repeated at regular intervals (the cycle time). The code sequences may be period-(2n−1) Small Kasami sequences; the beacon packet is a repeated series of (2n/2+1) period-(2n/2−1) progenitor maximal sequences, and behaves like a member of the Kasami family. The acyclic autocorrelation of the beacon packet has regularly-spaced sharp peaks modulated by a pyramidal envelope. The initial communications involve calculating the correlation between the received signal and delayed versions of an internally-generated beacon packet. The length of the initial communications is proportional to the square of the cycle time divided by the width of the acyclic autocorrelation. Synchronization involves locating the peak of the pyramidal envelope, and has a length related to the cycle time times the number of peaks in the acyclic autocorrelation.

    Abstract translation: 扩频收发器使用具有低互相关和良好峰值自相关的代码序列进行通信。 初始通信涉及广播由定期重复的信标包（循环时间）组成的信标信号。 代码序列可以是周期 - （2 -1）小Kasami序列; 信标分组是（2 +1）周期 - （2 -1）祖先最大序列的重复序列，并且表现得像Kasami家族的成员。 信标包的非循环自相关具有由金字塔形信封调制的规则间隔的尖峰。 初始通信涉及计算接收信号与内部生成的信标分组的延迟版本之间的相关性。 初始通信的长度与循环时间的平方除以非循环自相关的宽度成正比。 同步涉及定位金字塔形包络的峰，并且具有与循环时间相关的长度乘以非循环自相关中的峰数。

    Method and apparatus for controlling the rate of path searching in a communications system
    88.
    发明申请
    Method and apparatus for controlling the rate of path searching in a communications system 审中-公开
    控制通信系统中路径搜索速率的方法和装置

    公开(公告)号：US20040042411A1

    公开(公告)日：2004-03-04

    申请号：US10232282

    申请日：2002-08-30

    Inventor： Erik Dahlback ,  Robert Svensson

    IPC: H04L012/26

    CPC classification number: H04B1/7113 ,  H04B1/7117 ,  H04B2201/70709

    Abstract: A method and apparatus for controlling a rate of path searching for a channel in a communication system include searching for new path delays and identifying a number of new path delays during a specific time period. The identified number of new path delays are compared to at least one threshold value. The result of the comparison is used to alter the rate of path searching.

    Abstract translation: 用于控制通信系统中的信道的路径搜索速率的方法和装置包括在特定时间段内搜索新的路径延迟并识别新的路径延迟的数量。 将所识别的新路径延迟数与至少一个阈值进行比较。 比较结果用于改变路径搜索的速率。

    Spread spectrum receiver having multiple search windows to prevent misalignment during call
    89.
    发明授权
    Spread spectrum receiver having multiple search windows to prevent misalignment during call 失效
    具有多个搜索窗口的扩频接收机，以防止呼叫期间的未对准

    公开(公告)号：US06658046B1

    公开(公告)日：2003-12-02

    申请号：US09394875

    申请日：1999-09-13

    Applicant: Tetsuya Miura

    Inventor： Tetsuya Miura

    IPC: H04B169

    CPC classification number: H04B1/70754 ,  H04B1/7115 ,  H04B1/7117 ,  H04B2201/70709

    Abstract: A spread spectrum receiver includes a number of rake fingers for receiving a spread spectrum signal. Each rake finger despreads the spread spectrum signal with a despreading code. A rake combiner combines the outputs of the rake fingers. Control circuitry sets despreading codes of a first bit sequence to the rake fingers at respective timing offsets of incremental values so that there exists a timing difference of one chip interval between successive rake fingers. The control circuitry then successively varies the timing offsets in search of a call processing signal. Responsive to an output of the rake combiner indicating that the call processing signal is received, the control circuitry determines its timing offset relative to the refererence, and sets despreading codes of a second bit sequence to the rake fingers at respective timing offsets of the incremental values based on the determined timing offset to receive an information signal. If the receiver loses track of the correct timing of the information signal, the control circuitry successively varies the respective timing offsets of the rake fingers in search of the lost signal.

    Abstract translation: 扩频接收机包括用于接收扩频信号的多个耙指。 每个耙指用解扩码解扩扩频信号。 耙式组合器组合了耙指的输出。 控制电路在递增值的相应定时偏移下将第一比特序列的解扩码设置到耙指，使得在连续的耙指之间存在一个码片间隔的定时差。 然后，控制电路在搜索呼叫处理信号中连续地改变定时偏移。 响应于表示接收到呼叫处理信号的前置组合器的输出，控制电路相对于该参考确定其定时偏移量，并且在递增值的相应定时偏移下将第二比特序列的解扩展码设置到耙指 基于所确定的定时偏移来接收信息信号。 如果接收机失去对信息信号的正确定时的跟踪，则控制电路在搜索丢失信号时连续地改变耙指的相应定时偏移。

    Efficient method of improving detection of signals containing repetitive components
    90.
    发明申请
    Efficient method of improving detection of signals containing repetitive components 审中-公开
    改进检测含有重复组分的信号的有效方法

    公开(公告)号：US20030133430A1

    公开(公告)日：2003-07-17

    申请号：US10228840

    申请日：2002-08-27

    Inventor： William D. Dickson ,  Paul A. Kline

    IPC: H04B007/216

    CPC classification number: H04B1/70751 ,  H04B2201/70701 ,  H04B2201/70709

    Abstract: A synchronization channel detection method for cellular transmission is disclosed. Said method is based on an algorithm that adds coherent components and deriving an average of the components in a synchronization signal that is repetitively transmitted over a short period of time. This method achieves a detection gain as compared to correlation algorithms.

    Abstract translation: 公开了一种用于蜂窝传输的同步信道检测方法。 所述方法基于一种算法，其添加相干分量并导出在短时间段内重复发送的同步信号中的分量的平均值。 与相关算法相比，该方法实现了检测增益。

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