利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

121 条记录 (耗时 0.036 秒)

    Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system
    31.
    发明授权
    Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system 失效
    用于在CDMA通信系统中对来自多个基站的传输进行时间调整的方法和装置

    公开(公告)号：US07433321B2

    公开(公告)日：2008-10-07

    申请号：US10414578

    申请日：2003-04-15

    申请人： Francesco Grilli ,  Charles E. Wheatley, III ,  Serge Willenegger ,  Parvathanathan Subrahmanya

    发明人： Francesco Grilli ,  Charles E. Wheatley, III ,  Serge Willenegger ,  Parvathanathan Subrahmanya

    IPC分类号： H04J3/06

    CPC分类号： H04W56/002 ,  H04B7/2668 ,  H04B2201/70702 ,  H04W56/001 ,  H04W56/0015 ,  H04W56/0045 ,  H04W92/20

    摘要： Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).

    摘要翻译： 将来自多个基站的传输时间对齐到终端的方案。 为了实现时间对准，确定在终端观察到的来自基站的传输的到达时间之间的差异，并将其提供给系统，并用于调整基站处的定时，使得终端专用无线帧到达 终端在特定的时间窗口内。 在一个方案中，两个基站之间的时差被划分为帧级时间差和码片级时间差。 无论何时请求执行和报告时差测量，终端测量每个候选基站相对于参考基站的芯片级定时。 此外，终端还测量帧级定时，并且仅在需要时在时差测量中包括该信息。 否则，终端将帧级部分设置为预定值（例如，零）。

    Method and apparatus for beam switching in a wireless communication system
    32.
    发明授权
    Method and apparatus for beam switching in a wireless communication system 有权
    用于无线通信系统中的波束切换的方法和装置

    公开(公告)号：US07400606B2

    公开(公告)日：2008-07-15

    申请号：US10825748

    申请日：2004-04-16

    申请人： Roberto Padovani ,  Paul E. Bender ,  Ahmad Jalali ,  Bruce Judson ,  Charles E. Wheatley, III

    发明人： Roberto Padovani ,  Paul E. Bender ,  Ahmad Jalali ,  Bruce Judson ,  Charles E. Wheatley, III

    IPC分类号： H04B7/204

    CPC分类号： H04W16/12 ,  H04W16/02

    摘要： In a CDMA data communication system capable of variable rate transmission, utilization of beam switching techniques decreases the average interference caused by transmissions of a base station to subscriber stations within a cell, and in neighboring cells. Base stations utilize multiple transmit antennas, each transmitting signals at controlled amplitudes and phases, to form transmit signal corresponding to sector divisions. Data and reference signals are transmitted along sector division beams that alternate according to fixed time slots in order to increase system capacity and data rates by maximizing carrier-to-interference ratios (C/I) measured at subscriber stations.

    摘要翻译： 在能够进行可变速率传输的CDMA数据通信系统中，波束切换技术的利用减少了由基站向小区内和相邻小区中的用户台的传输引起的平均干扰。 基站利用多个发射天线，每个发射天线以受控的幅度和相位传输信号，以形成对应于扇区划分的发射信号。 数据和参考信号沿着根据固定时隙交替的扇区分波束传输，以通过最大化在用户台测量的载波干扰比（C / I）来增加系统容量和数据速率。

    Method and apparatus for providing wireless communication system synchronization
    33.
    发明授权
    Method and apparatus for providing wireless communication system synchronization 有权
    用于提供无线通信系统同步的方法和装置

    公开(公告)号：US07391759B2

    公开(公告)日：2008-06-24

    申请号：US10383855

    申请日：2003-03-07

    申请人： Mark S. Wallace ,  Edward G. Tiedemann, Jr. ,  Charles E. Wheatley, III ,  J. Rod Walton ,  Steven J. Howard

    发明人： Mark S. Wallace ,  Edward G. Tiedemann, Jr. ,  Charles E. Wheatley, III ,  J. Rod Walton ,  Steven J. Howard

    IPC分类号： H04J3/06

    CPC分类号： H04B7/2696

    摘要： When insufficient traffic is present in the network to maintain synchronization in this manner, other methods must be used. One approach involves making direct measurements of the timing between base stations. This is accomplished in one of two ways. The base may interrupt its transmissions on all sectors for a short interval during which it determines the time of arrival of signals from other base stations. Given knowledge of the other base station locations, time errors relative to all other base stations may be derived. Alternatively, the base may send a short signal at high power in the mobile transmit band. This time-of-arrival of this signal is measured by the surrounding base stations and the time errors between pairs of base stations are computed. In some cases, a base station may be isolated sufficiently from all other base stations in the network such that direct base-to-base measurement is not viable. In this case, a fixed mobile is placed at a location in the handoff region between the isolated cell and another cell in the network. The fixed mobile either performs measurements of base station pilots on command of the base and reports the timing information, or sends a burst transmission at a specified time and power level to be measured by the base stations.

    摘要翻译： 当网络中不足够的流量以这种方式维持同步时，必须使用其他方法。 一种方法包括对基站之间的定时进行直接测量。 这是通过两种方式之一实现的。 基站可以在所有扇区上中断其传输短时间间隔，在此期间它确定来自其他基站的信号的到达时间。 鉴于其他基站位置的知识，可以导出相对于所有其他基站的时间误差。 或者，基站可以在移动发射频带中以高功率发送短信号。 该信号的到达时间由周围的基站测量，并且计算基站对之间的时间误差。 在一些情况下，基站可以与网络中的所有其他基站充分隔离，使得直接基站到基站的测量是不可行的。 在这种情况下，固定移动台被放置在隔离小区与网络中的另一小区之间的切换区域中的位置。 固定移动台可以在基站的指令下执行基站导频的测量，并且报告定时信息，或者在由基站测量的指定时间和功率电平上发送突发传输。

    Method and apparatus for adjusting power control setpoint in a wireless communication system
    34.
    发明授权
    Method and apparatus for adjusting power control setpoint in a wireless communication system 失效
    用于在无线通信系统中调整功率控制设定点的方法和装置

    公开(公告)号：US06763244B2

    公开(公告)日：2004-07-13

    申请号：US09810685

    申请日：2001-03-15

    申请人： Tao Chen ,  Jack M. Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles E. Wheatley, III

    发明人： Tao Chen ,  Jack M. Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles E. Wheatley, III

    IPC分类号： H04B116

    CPC分类号： H04W52/12 ,  H04L1/0051 ,  H04L1/0066 ,  H04L1/208 ,  H04W52/20 ,  H04W52/36

    摘要： Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power surplus/deficit indicative of the difference between the received signal quality and the setpoint, setpoint surplus/deficit indicative of the difference between the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics may include re-encoded symbol error rate, re-encoded power metric, modified Yamamoto metric, minimum or average LLR among decoded bits, number of decoding iterations, and possibly others. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.

    摘要翻译： 调整无线通信系统中功率控制回路设定值的技术。 可以基于指示擦除/良好解码帧的帧状态来调整设定点，指示解码结果的置信度的一个或多个（通常为软）度量，指示接收信号质量与设定点之间的差异的功率余量/ ，表示设定值与所需性能水平所需的阈值Eb / Nt之间的差异的设定值剩余/缺失，或其组合。 度量可以包括重新编码的符号错误率，重新编码的功率度量，修改的Yamamoto度量，解码比特中的最小或平均LLR，解码迭代次数，以及可能的其他值。 可以根据上述因素以不同的方式和/或不同的量调节设定点。 这些技术可以用于CDMA系统中的前向和/或反向链路。

    Method and system for providing personal base station communications
    36.
    发明授权
    Method and system for providing personal base station communications 失效
    提供个人基站通信的方法和系统

    公开(公告)号：US06381230B1

    公开(公告)日：2002-04-30

    申请号：US09123495

    申请日：1998-07-28

    申请人： Charles E. Wheatley, III ,  Edward G. Tiedemann, Jr. ,  Joseph P. Odenwalder ,  Rajeev Krishnamurthi

    发明人： Charles E. Wheatley, III ,  Edward G. Tiedemann, Jr. ,  Joseph P. Odenwalder ,  Rajeev Krishnamurthi

    IPC分类号： H04Q700

    CPC分类号： H04W16/16 ,  H04W84/042 ,  H04W84/105 ,  H04W88/04 ,  H04W88/06 ,  H04W88/08

    摘要： A method and system for operation of a personal base station where the forward link of a personal base station is on the same frequency assignment as a first forward link data signal transmitted by a macro base station belonging to a cellular communication system. A first subscriber station communicates with the macro base station. The personal base station generates a second forward link data signal and communicates with a second subscriber station. The personal base station receives the first forward link data signal and combines it with its own second forward link data signal to form a combined forward link data signal. The personal base station then transmits the combined forward link data signal. The first subscriber station is able to receive and diversity combine the combined forward link data signal, improving the signal to noise ratio that would otherwise occur in the vicinity of the personal base station.

    摘要翻译： 一种用于个人基站的操作的方法和系统，其中个人基站的前向链路与属于蜂窝通信系统的宏基站发送的与第一前向链路数据信号相同的频率分配。 第一用户站与宏基站进行通信。 个人基站产生第二前向链路数据信号并与第二用户台进行通信。 个人基站接收第一前向链路数据信号并将其与其自己的第二前向链路数据信号组合，以形成组合的前向链路数据信号。 然后，个人基站发送组合的前向链路数据信号。 第一用户台能够接收并分集组合前向链路数据信号，从而提高否则将发生在个人基站附近的信噪比。

    Method and apparatus for increasing receiver immunity to interference
    38.
    发明授权
    Method and apparatus for increasing receiver immunity to interference 失效
    增加接收机抗干扰能力的方法和装置

    公开(公告)号：US5722061A

    公开(公告)日：1998-02-24

    申请号：US723491

    申请日：1996-09-30

    申请人： James A. Hutchison, IV ,  Charles E. Wheatley, III ,  Chris P. Wieck

    发明人： James A. Hutchison, IV ,  Charles E. Wheatley, III ,  Chris P. Wieck

    IPC分类号： H04B1/06 ,  H03G1/00 ,  H03G3/30 ,  H04B20060101 ,  H04B1/10 ,  H04B1/16 ,  H04B1/18 ,  H04B1/40 ,  H04B3/06 ,  H04B7/005 ,  H04B7/26 ,  H04B15/00 ,  H03G3/20

    CPC分类号： H03F3/72 ,  H03G1/0088 ,  H03G3/3052 ,  H03G3/3068 ,  H04B1/109 ,  H04B1/70755 ,  H04B1/7097 ,  H04W52/52 ,  H03F2203/7239 ,  Y02B60/50

    摘要： A method for adjusting the gain of a receive circuit, thereby improving a receiver's immunity to interference. The circuit has an LNA which amplifies the received signal. The receive signal power is controlled by enabling or disabling the LNA in response to the measured received signal power. The received power level is periodically compared to a threshold. When the received power level is greater than the threshold, the LNA is disabled. The LNA is re-enabled when the received power level is less than the threshold, and there are no significant intermodulation components detected. The intermodulation components are detected by briefly enabling the LNA and detecting the resultant change in the measured signal power. If the detected change is more than a predetermined amount, then there are significant intermodulation components present, and the LNA is not re-enabled. Otherwise, there are not significant intermodulation components present, and the LNA is re-enabled.

    摘要翻译： 一种用于调整接收电路的增益的方法，从而提高接收机对干扰的抗扰度。 该电路具有放大接收信号的LNA。 通过响应于测量的接收信号功率启用或禁用LNA来控制接收信号功率。 接收功率电平定期与阈值进行比较。 当接收到的功率级别大于阈值时，LNA被禁用。 当接收功率电平小于阈值时，LNA被重新使能，并且没有检测到显着的互调分量。 通过短暂启用LNA并检测所测量的信号功率的结果变化来检测互调分量。 如果检测到的改变超过预定量，则存在显着的互调分量，并且LNA不被重新启用。 否则，不存在显着的互调组件，并且LNA被重新启用。