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121 条记录 (耗时 0.04 秒)

    Method and apparatus for pilot search using a matched filter
    1.
    发明授权
    Method and apparatus for pilot search using a matched filter 有权
    使用匹配滤波器进行导频搜索的方法和装置

    公开(公告)号：US06760366B1

    公开(公告)日：2004-07-06

    申请号：US09450265

    申请日：1999-11-29

    申请人： Charles E. Wheatley, III ,  John E. Maloney

    发明人： Charles E. Wheatley, III ,  John E. Maloney

    IPC分类号： H04B169

    CPC分类号： H04B1/7075 ,  H04B1/7093 ,  H04B2201/70701

    摘要： The present invention includes a cellular pilot signal detector or searcher for use in a cellular mobile communications unit. The signal detector uses a matched filter to detect a pilot signal transmitted from a cellular base station. The matched filter includes a plurality of taps and a plurality of delays located between adjacent taps. The signal components of a received digital signal are held on the taps of the matched filter by the delays. The matched filter compares the signal components of the received signal to an expected or searched for digital pattern. The matched filter puts out a relatively large signal if the received digital signal matches the expected digital pattern. The matched filter can also be used in parallel with a correlator.

    摘要翻译： 本发明包括在蜂窝移动通信单元中使用的蜂窝导频信号检测器或搜索器。 信号检测器使用匹配滤波器来检测从蜂窝基站发送的导频信号。 匹配滤波器包括位于相邻水龙头之间的多个抽头和多个延迟。 接收到的数字信号的信号分量由延迟保持在匹配滤波器的抽头上。 匹配滤波器将接收信号的信号分量与预期或搜索的数字模式进行比较。 如果接收到的数字信号与预期的数字模式匹配，则匹配滤波器输出相对较大的信号。 匹配滤波器也可以与相关器并联使用。

    Method and apparatus for a pilot search using a matched filter
    2.
    发明授权
    Method and apparatus for a pilot search using a matched filter 有权
    使用匹配滤波器进行导频搜索的方法和装置

    公开(公告)号：US07130334B2

    公开(公告)日：2006-10-31

    申请号：US10759981

    申请日：2004-01-16

    申请人： Charles E. Wheatley, III ,  John E. Maloney

    发明人： Charles E. Wheatley, III ,  John E. Maloney

    IPC分类号： H04B1/69

    CPC分类号： H04B1/7075 ,  H04B1/7093 ,  H04B2201/70701

    摘要： The present invention includes a cellular pilot signal detector or searcher for use in a cellular mobile communications unit. The signal detector uses a matched filter to detect a pilot signal transmitted from a cellular base station. The matched filter includes a plurality of taps and a plurality of delays located between adjacent taps. The signal components of a received digital signal are held on the taps of the matched filter by the delays. The matched filter compares the signal components of the received signal to an expected or searched for digital pattern. The matched filter puts out a relatively large signal if the received digital signal matches the expected digital pattern. The matched filter can also be used in parallel with a correlator.

    摘要翻译： 本发明包括在蜂窝移动通信单元中使用的蜂窝导频信号检测器或搜索器。 信号检测器使用匹配滤波器来检测从蜂窝基站发送的导频信号。 匹配滤波器包括位于相邻水龙头之间的多个抽头和多个延迟。 接收到的数字信号的信号分量由延迟保持在匹配滤波器的抽头上。 匹配滤波器将接收信号的信号分量与预期或搜索的数字模式进行比较。 如果接收到的数字信号与预期的数字模式匹配，则匹配滤波器输出相对较大的信号。 匹配滤波器也可以与相关器并联使用。

    Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system
    6.
    发明授权
    Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system 有权
    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：US07903633B2

    公开(公告)日：2011-03-08

    申请号：US12196489

    申请日：2008-08-22

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

    发明人： Francesco Grilli ,  Charles E. Wheatley, III ,  Serge D. 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 adjusting power control setpoint in a wireless communication system
    7.
    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：US07643842B2

    公开(公告)日：2010-01-05

    申请号：US10889808

    申请日：2004-07-12

    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： H04B1/16 ,  H04W52/18

    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（通常是软的）度量，指示接收到的信号质量和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 apparatus for generating oscillating signals
    9.
    发明授权
    Method and apparatus for generating oscillating signals 有权
    用于产生振荡信号的方法和装置

    公开(公告)号：US07592878B2

    公开(公告)日：2009-09-22

    申请号：US11696875

    申请日：2007-04-05

    申请人： Russell John Fagg ,  Charles E. Wheatley, III

    发明人： Russell John Fagg ,  Charles E. Wheatley, III

    IPC分类号： H03L1/00

    CPC分类号： H03L1/022 ,  H03B5/06 ,  H03B5/1265 ,  H03B2200/0066 ,  H03B2200/0094 ,  H03L3/00 ,  H04B2001/6908

    摘要： An apparatus for generating an oscillating signal that includes a circuit to accelerate the time in which an oscillating signal reaches a defined steady-state condition from a cold start. The apparatus includes an oscillating circuit to generate an oscillating signal; a first circuit to supply a first current to the oscillating circuit; and a second circuit to supply a second current to the oscillating circuit, wherein the first and second currents are adapted to reduce the time duration for the oscillating signal to reach a defined steady-state condition. The apparatus may be useful in communication systems that use low duty cycle pulse modulation to establish one or more communications channels, whereby the apparatus begins generating an oscillating signal at approximately the beginning of the pulse and terminates the oscillating signal at approximately the end of the pulse.

    摘要翻译： 一种用于产生振荡信号的装置，其包括用于加速从冷启动振荡信号达到确定的稳态状态的时间的电路。 该装置包括产生振荡信号的振荡电路; 向振荡电路提供第一电流的第一电路; 以及向振荡电路提供第二电流的第二电路，其中第一和第二电流适于减小振荡信号达到所定义的稳态条件的持续时间。 该装置在使用低占空比脉冲调制以建立一个或多个通信信道的通信系统中可能是有用的，由此该装置在大约开始的脉冲处开始产生振荡信号，并在脉冲的大致末端终止振荡信号 。

    Method and apparatus for forward power control in a communication system
    10.
    发明授权
    Method and apparatus for forward power control in a communication system 失效

    公开(公告)号：US07515580B2

    公开(公告)日：2009-04-07

    申请号：US10866296

    申请日：2004-06-10

    申请人： Charles E. Wheatley, III ,  Rashid A. Attar ,  Eduardo A. S. Esteves

    发明人： Charles E. Wheatley, III ,  Rashid A. Attar ,  Eduardo A. S. Esteves

    IPC分类号： H04J3/24

    CPC分类号： H04W52/24 ,  H04W52/26 ,  H04W52/267 ,  H04W52/286 ,  H04W68/00 ,  H04W72/1231

    摘要： In a data communication system capable of variable rate transmission, the data rate is determined by the largest C/I measurement of the forward link signals as measured at the Access Terminal. In one embodiment, the data transmission is scheduled based on an Access Terminal initiated forward power control, which reduces forward link rate quantization loss due to excess transmit power. The Access Terminal reports to the Access Point the excess C/I estimate for the selected rate. The Access Point then reduces its transmit power by an appropriate amount when serving that Access Terminal. In another embodiment, the data transmission is scheduled based on an Access Point initiated forward power control. The Access Point varies its transmit power over time either randomly or in synchronism with neighboring Access Points in the communication system, which enables an increase in the throughput achieved by users that receive a significant amount of interference.