专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

81. 发明授权

US06967998B1 Method and apparatus for monitoring transmission quality 失效
标题翻译：监测传输质量的方法和装置
公开(公告)号：US06967998B1
公开(公告)日：2005-11-22
申请号：US09438988
申请日：1999-11-12
申请人： Tao Chen , Fuyun Ling , Edward G. Tiedemann, Jr.
发明人： Tao Chen , Fuyun Ling , Edward G. Tiedemann, Jr.
IPC分类号： H04B7/26 , H04B17/00 , H04W28/04 , H04L1/20
CPC分类号： H04B17/327 , H04B17/309
摘要： In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter.
摘要翻译：在无线通信中，需要监控通信信道的传输质量，保持系统的性能和运行。本发明提供了一种在接收机中测量信道中的比特错误率的方法，而不会通过将质量监视数据插入到发射机的信号中来减少信道吞吐量。

82. 发明授权

US06961388B2 Coding scheme for a wireless communication system 有权
公开(公告)号：US06961388B2
公开(公告)日：2005-11-01
申请号：US09776073
申请日：2001-02-01
申请人： Fuyun Ling , Nagabhushana T. Sindhushayana , Jay R. Walton , Mark Wallace , Ivan Fernandez
发明人： Fuyun Ling , Nagabhushana T. Sindhushayana , Jay R. Walton , Mark Wallace , Ivan Fernandez
IPC分类号： H04J11/00 , H04B7/04 , H04J99/00 , H04L1/00 , H04L27/26 , H04B7/02 , H04L1/02
CPC分类号： H04B7/0417 , H04B7/0632 , H04L1/0009 , H04L1/0041 , H04L1/005 , H04L1/0055 , H04L1/0066 , H04L1/0068 , H04L1/0071 , H04L5/0023 , H04L5/0046 , H04L5/0048 , H04L5/006 , H04L25/03171 , H04L27/3488
摘要： Coding techniques for a (e.g., OFDM) communication system capable of transmitting data on a number of “transmission channels” at different information bit rates based on the channels' achieved SNR. A base code is used in combination with common or variable puncturing to achieve different coding rates required by the transmission channels. The data (i.e., information bits) for a data transmission is encoded with the base code, and the coded bits for each channel (or group of channels with the similar transmission capabilities) are punctured to achieve the required coding rate. The coded bits may be interleaved (e.g., to combat fading and remove correlation between coded bits in each modulation symbol) prior to puncturing. The unpunctured coded bits are grouped into non-binary symbols and mapped to modulation symbols (e.g., using Gray mapping). The modulation symbol may be “pre-conditioned” and prior to transmission.

83. 发明申请

US20050163263A1 Systems and methods for frequency acquisition in a wireless communication network 审中-公开
标题翻译：无线通信网络中频率采集的系统和方法
公开(公告)号：US20050163263A1
公开(公告)日：2005-07-28
申请号：US11021028
申请日：2004-12-22
申请人： Alok Gupta , Fuyun Ling
发明人： Alok Gupta , Fuyun Ling
IPC分类号： H04L27/06
CPC分类号： H04L27/2665 , H04L7/007 , H04L27/2656 , H04L27/2657 , H04L27/2663 , H04L27/2675 , H04L27/2695
摘要： The disclosed embodiments provide for methods and systems for initial frequency acquisition in a wireless communication network. In one aspect, a method for initial frequency acquisition includes the acts of receiving a stream of input samples from a transmitter, determining an estimate for a frequency offset associated with the transmitter and the receiver based on the received input samples, and compensating for the frequency offset to achieve an initial frequency acquisition.
摘要翻译：所公开的实施例提供了用于无线通信网络中的初始频率采集的方法和系统。一方面，一种用于初始频率获取的方法包括从发射机接收输入样本流的动作，基于接收到的输入样本确定与发射机和接收机相关联的频率偏移的估计，并补偿频率偏移以实现初始频率采集。

84. 发明授权

US06597922B1 Method and apparatus for efficient candidate frequency search while initiating a handoff in a code division multiple access communication system 有权
标题翻译：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
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。

85. 发明授权

US06522683B1 Method and apparatus for adaptive linear equalization for walsh covered modulation 有权
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.

86. 发明授权

US06498805B1 Apparatus and method for estimating channel phase using channel symbol reliability data 有权
标题翻译：使用信道符号可靠性数据估计信道相位的装置和方法
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。

87. 发明授权

US06466558B1 Selection mechanism for signal combining methods 有权
标题翻译：信号组合方法的选择机制
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。

88. 发明授权

US5737327A Method and apparatus for demodulation and power control bit detection in a spread spectrum communication system 失效
标题翻译：扩频通信系统中解调和功率控制位检测的方法和装置
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）。

89. 发明授权

US5671255A Method and apparatus for determining coding rate in a wireless communication system 失效
标题翻译：用于确定无线通信系统中的编码率的方法和装置
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。

90. 发明授权

US5319636A Device and method for linear listener echo cancellation 失效
标题翻译：用于线性侦听器回声消除的设备和方法
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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式