公开(公告)号：US06597922B1

公开(公告)日：2003-07-22

申请号：US09312262

申请日：1999-05-14

申请人： Fuyun Ling ,  Jack Holtzman ,  Charles E. Wheatley, III ,  Tao Chen ,  Edward G. Tiedemann ,  Gilbert Leung

发明人： Fuyun Ling ,  Jack Holtzman ,  Charles E. Wheatley, III ,  Tao Chen ,  Edward G. Tiedemann ,  Gilbert Leung

IPC分类号： H04B700

CPC分类号： H04W52/225 ,  H04W36/0094 ,  H04W52/40 ,  H04W52/42

摘要： A method and apparatus for efficient candidate frequency search while initiating a handoff in a code division multiple access communication system. The method includes when the pilot signal is transmitted by the mobile station that is power controlled to a target receive level, the traffic channel power level is increased relative to the pilot channel to improve receiver performance. An improved feature is that the received pilot received at the base station stays the same while the receiver receives extra energy in the redundant traffic symbols received to enhance the probability of correctly decoding the received frame. The base station detects the absence of the mobile station transmitted signal from the frequency of interest. If the base station is aware of the starting time and duration of the absence, it can focus its detection during this predetermined time period. The performance can be improved if the absence of the signal is spread across two frames at the frame boundary.

摘要翻译： 一种用于在码分多址通信系统中发起切换的有效候选频率​​搜索的方法和装置。 该方法包括当导频信号由被功率控制到目标接收电平的移动台发送时，业务信道功率电平相对于导频信道增加，以提高接收机性能。 改进的特征是在基站处接收到的接收到的导频保持相同，而接收机在接收到的冗余业务符号中接收到额外的能量以增强正确解码接收帧的概率。 基站从感兴趣的频率检测到不存在移动台发送的信号。 如果基站知道不存在的起始时间和持续时间，则可以在该预定时间段内集中其检测。 如果没有信号在帧边界的两个帧上扩展，则可以提高性能。

公开(公告)号：US06522683B1

公开(公告)日：2003-02-18

申请号：US09636008

申请日：2000-08-10

申请人： John E. Smee ,  Ahmad Jalali ,  Fuyun Ling ,  Mark Wallace

发明人： John E. Smee ,  Ahmad Jalali ,  Fuyun Ling ,  Mark Wallace

IPC分类号： H04B169

CPC分类号： H04B1/7097 ,  H04L25/03038 ,  H04L2025/03375 ,  H04L2025/03477

摘要： A receive filter receives signals from a communication channel. The received signals correspond to original Walsh covered chip sequences transmitted by a transmit filter through the communication channel to the receive filter. The received signals are processed by an equalizer to generate a soft estimate of chip sequences corresponding to the original Walsh covered chip sequences. An N chip Walsh decover is then utilized to generate a soft estimate of code symbols corresponding to the soft estimate of the chip sequences. A number of symbol slicers are then used in parallel to produce a hard estimate of the code symbols corresponding to the soft estimate of code symbols generated by the N chip Walsh decover. Thereafter an N chip Walsh cover is used as part of a scheme to generate a hard estimate of chip sequences corresponding to the hard estimate of the code symbols generated by the symbol slicers. The hard estimate of the chip sequences generated with the aid of the N chip Walsh cover, and the soft estimate of the chip sequences generated by the equalizer, are used to generate a tracking mode error signal to adapt the response of the equalizer to the received signals.

公开(公告)号：US06498805B1

公开(公告)日：2002-12-24

申请号：US09433814

申请日：1999-11-03

申请人： Tyler Brown ,  Michael Mao Wang ,  Fuyun Ling

发明人： Tyler Brown ,  Michael Mao Wang ,  Fuyun Ling

IPC分类号： H04B169

CPC分类号： H04L1/0071 ,  H04B2201/70701 ,  H04L1/0055 ,  H04L25/067 ,  H04L2027/003 ,  H04L2027/0046 ,  H04L2027/0087

摘要： An apparatus and method provides channel phase compensation for a digital radio frequency RF channel, by analyzing a demodulated signal (24) communicated over the digital RF channel and generates data representing an estimate of a channel phase (28), based on channel symbol reliability data (242) generated for at least one channel symbol received over the RF channel. The apparatus and method iteratively generates channel symbol reliability data (242) for a same symbol until a frame containing the symbol is determined to either pass a frame error threshold or until a predetermined number of iterations of channel phase estimates for a symbol is detected.

摘要翻译： 一种装置和方法，通过分析通过数字RF信道传送的解调信号（24）并基于信道符号可靠性数据产生表示信道相位估计（28）的数据，为数字射频RF信道提供信道相位补偿 （242），用于通过RF信道接收的至少一个信道符号生成。 该装置和方法迭代地产生用于相同符号的信道符号可靠性数据（242），直到包含符号的帧被确定为通过帧错误阈值或者直到检测到符号的信道相位估计的预定次数为止。

公开(公告)号：US06466558B1

公开(公告)日：2002-10-15

申请号：US09414125

申请日：1999-10-08

申请人： Fuyun Ling

发明人： Fuyun Ling

IPC分类号： H04Q700

CPC分类号： H04B1/7115 ,  H04B1/712 ,  H04B7/0854

摘要： An optimum combiner that reduces the amount of interference imposed upon a first base station by transmissions of other base stations within the same communication system. Two antennas are used to receive transmissions within a receiving station. A rake receiver is coupled to each antenna. By optimally combining the signals that are received by each independent finger of the rake receiver, interference that is correlated between a finger associated with the first antenna and a finger associated with the second antenna can be minimized with respect to the desired signal. Optimum combining requires determination of optimum combining coefficients. A max-ratio combining algorithm may be substituted for the optimal combining algorithm depending upon interference characteristics.

摘要翻译： 一种最佳组合器，其通过在同一通信系统内的其它基站的传输来减少对第一基站施加的干扰量。 两个天线用于在接收站内接收传输。 耙式接收器耦合到每个天线。 通过最佳地组合由瑞克接收机的每个独立手指接收到的信号，可以相对于期望的信号来最小化与第一天线相关联的手指与与第二天线相关联的手指之间相关的干扰。 最佳组合需要确定最佳组合系数。 最大比组合算法可以取决于干扰特性的最佳组合算法。

公开(公告)号：US5737327A

公开(公告)日：1998-04-07

申请号：US624329

申请日：1996-03-29

申请人： Fuyun Ling ,  David E. Borth ,  Colin D. Frank ,  Phillip D. Rasky ,  James F. Kepler

发明人： Fuyun Ling ,  David E. Borth ,  Colin D. Frank ,  Phillip D. Rasky ,  James F. Kepler

IPC分类号： H04B1/707 ,  H04B7/005 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04L25/02 ,  H04J13/04 ,  H04Q7/20

CPC分类号： H04W52/60 ,  H04B1/707 ,  H04J13/00 ,  H04L25/0214 ,  H04W52/42 ,  H04L25/0226

摘要： A receiver circuit (400, 500) receives a spread spectrum communication signal, such as a DS-CDMA signal, including a pilot channel and including a power control designator. The signal is despread and decoded. The pilot symbols on the pilot channel are provided to a channel estimator (408) for estimating the channel phase and channel gain of the communication channel. This estimate is provided to a demodulator (422) for demodulating the traffic channel symbols. The pilot symbols are provided to another channel estimator (410) for estimating channel phase and channel gain for the power control designator. This estimate is provided to a demodulator (424) for demodulating the power control designator. The traffic channel symbols are delayed a predetermined time in a delay element (420) before demodulating. The power control designator is delayed a short time or not at all in a short delay element (418) before demodulation.

摘要翻译： 接收机电路（400,500）接收包括导频信道并包括功率控制指示符的扩频通信信号，例如DS-CDMA信号。 信号被解扩和解码。 导频信道上的导频符号被提供给用于估计通信信道的信道相位和信道增益的信道估计器（408）。 该估计被提供给用于解调业务信道符号的解调器（422）。 导频符号被提供给用于估计功率控制指示符的信道相位和信道增益的另一信道估计器（410）。 该估计被提供给用于解调功率控制指示符的解调器（424）。 业务信道符号在解调之前延迟延迟元件（420）中的预定时间。 在解调之前，功率控制指示符在短时间内延迟短暂的延迟元件（418）。

公开(公告)号：US5671255A

公开(公告)日：1997-09-23

申请号：US624233

申请日：1996-03-29

申请人： Michael Mao Wang ,  Fuyun Ling ,  Kenneth A. Stewart

发明人： Michael Mao Wang ,  Fuyun Ling ,  Kenneth A. Stewart

IPC分类号： H04J13/02 ,  H03M13/23 ,  H04B1/707 ,  H04L1/00 ,  H04L1/20 ,  H04L25/02 ,  H04Q7/38 ,  H04L27/06 ,  G06F11/10 ,  H04J3/22

CPC分类号： H04L1/208 ,  H04L1/0046 ,  H04L1/0054 ,  H04L1/20 ,  H04L25/0262 ,  H04B2201/70705

摘要： A receiver (500) utilizes parameters generated by a Viterbi decoder (530) to determine one of a plurality of coding rates in which user information is transmitted. The receiver (500) combines the parameters in a predetermined manner, the result of which is a detection statistic (dij). By utilizing the detection statistic (dij), the coding rate at which user information is accurately determined.

摘要翻译： 接收机（500）利用由维特比解码器（530）产生的参数来确定发送用户信息的多个编码速率中的一个。 接收机（500）以预定的方式组合参数，其结果是检测统计量（dij）。 通过利用检测统计量（dij），准确地确定用户信息的编码率。

公开(公告)号：US5319636A

公开(公告)日：1994-06-07

申请号：US791702

申请日：1991-11-14

申请人： Guozhu Long ,  Fuyun Ling ,  M. Vedat Eyuboglu

发明人： Guozhu Long ,  Fuyun Ling ,  M. Vedat Eyuboglu

IPC分类号： H04B3/23 ,  H04J15/00

CPC分类号： H04B3/235 ,  H04B3/232

摘要： A device and method utilize a linear feedback/feedforward configuration to estimate and cancel a listener echo wherein equalizer (202) and listener echo cancellation (204 and 208) units are jointly updated, allowing determination of an error signal once (204 and 208), in place of the former method of separate error signal determination for each of an equalizer and a listener echo canceller. An improved phase-correction scheme is utilized to compensate the frequency offset in the listener echo. The relationship between the listener echo and talker far echo is utilized to facilitate the listener echo cancellation.

摘要翻译： 一种设备和方法利用线性反馈/前馈配置来估计和消除收听者回声，其中均衡器（202）和收听者回声消除（204和208）单元被联合更新，允许确定一次错误信号（204和208） 代替均衡器和收听回波消除器中的每一个的单独的误差信号确定的前一种方法。 利用改进的相位校正方案来补偿收听者回波中的频率偏移。 听众回声和讲话者远端回声之间的关系被用来促进听众回声消除。

公开(公告)号：US08982832B2

公开(公告)日：2015-03-17

申请号：US12165663

申请日：2008-07-01

申请人： Fuyun Ling ,  Thomas Sun ,  Tao Tian ,  Raghuraman Krishnamoorthi ,  Jing Jiang

发明人： Fuyun Ling ,  Thomas Sun ,  Tao Tian ,  Raghuraman Krishnamoorthi ,  Jing Jiang

IPC分类号： H04W4/00 ,  H04J3/00 ,  H03M13/29 ,  H04L1/00

CPC分类号： H03M13/2957 ,  H04L1/0066 ,  H04L1/0071

摘要： A turbo-coded data block is processed for transmission on a wireless communication link by scheduling a plurality of portions of the block for transmission during respectively corresponding transmit intervals that are temporally separated from one another. The block portions are transmitted during the respectively corresponding transmit intervals according to the scheduling.

摘要翻译： 通过在时间上彼此分离的分别对应的发送间隔期间调度用于发送的块的多个部分来处理turbo编码的数据块以在无线通信链路上进行发送。 根据调度在分别对应的发送间隔期间发送块部分。

公开(公告)号：US08981996B2

公开(公告)日：2015-03-17

申请号：US11327535

申请日：2006-01-05

申请人： Fuyun Ling ,  Gordon Kent Walker ,  Krishna Kiran Mukkavilli

发明人： Fuyun Ling ,  Gordon Kent Walker ,  Krishna Kiran Mukkavilli

IPC分类号： G01S5/02 ,  G01S5/10 ,  G01S5/14

CPC分类号： G01S5/021 ,  G01S5/0226 ,  G01S5/10 ,  G01S5/14

摘要： Systems and methods are provided for determining position location information in a wireless network. In one embodiment, timing offset information is communicated between multiple transmitters and one or more receivers. Such information enables accurate position or location determinations to be made that account for timing differences throughout the network. In another embodiment, transmitter phase adjustments are made that advance or delay transmissions from the transmitters to account for potential timing differences at receivers. In yet another embodiment, combinations of timing offset communications and/or transmitter phase adjustments can be employed in the wireless network to facilitate position location determinations.

摘要翻译： 提供了用于确定无线网络中的位置信息的系统和方法。 在一个实施例中，在多个发射机和一个或多个接收机之间传送定时偏移信息。 这样的信息使得可以进行精确的位置或位置确定，从而考虑整个网络的时序差异。 在另一个实施例中，进行发射机相位调整，其推进或延迟来自发射机的传输以考虑接收机处的潜在时序差异。 在另一个实施例中，可以在无线网络中采用定时偏移通信和/或发射机相位调整的组合以便于位置定位确定。

公开(公告)号：US08874998B2

公开(公告)日：2014-10-28

申请号：US12467303

申请日：2009-05-17

申请人： Gordon Kent Walker ,  Rajiv Vijayan ,  Seong Taek Chung ,  Murali Ramaswamy Chari ,  Fuyun Ling

发明人： Gordon Kent Walker ,  Rajiv Vijayan ,  Seong Taek Chung ,  Murali Ramaswamy Chari ,  Fuyun Ling

IPC分类号： H03M13/00 ,  H04W52/02 ,  H04L27/34

CPC分类号： H04L27/3488 ,  H04W52/0245 ,  Y02D70/00

摘要： A wireless communication apparatus in a hierarchically coded modulation system can use error control mechanisms generated during decoding of base layer information to predict a probability of successful demodulation of enhancement layer information. Performance in the demodulation of the base layer correlates to performance in the demodulation of the enhancement layer. The receiver can determine whether to attempt demodulation of temporally correlated enhancement layer data based in part on the predicted probability of success. If the receiver determines not to demodulate the enhancement layer, the receiver can power down the enhancement layer demodulator, or otherwise minimize the power expended in the enhancement layer demodulator.