公开(公告)号：US5809020A

公开(公告)日：1998-09-15

申请号：US617006

申请日：1996-03-18

申请人： Eugene J. Bruckert ,  Fuyun Ling

发明人： Eugene J. Bruckert ,  Fuyun Ling

IPC分类号： H04B1/712 ,  H04L1/06 ,  H04B7/216

CPC分类号： H04B1/712 ,  H04L1/06 ,  H04B2201/70701

摘要： A method (300) for adaptively adjusting weighting coefficients (188, 190, 192) in a code division multiple access (CDMA) radio receiver (100). A representation (172) of a desired RF signal (166) is received (108, 124, 127). A plurality of pilot signals (178, 182, 186) are generated responsive to the representation (172) of a desired RF signal (166). Each of a plurality of weighting coefficients (188, 190, 192) is determined responsive to more than one of the plurality of pilot signals (178, 182, 186).

摘要翻译： 一种用于在码分多址（CDMA）无线电接收机（100）中自适应地调整加权系数（188,190,192）的方法（300）。 接收期望RF信号（166）的表示（172）（108,124,127）。 响应于所需RF信号（166）的表示（172）产生多个导频信号（178,182,186）。 多个加权系数（188,192,192）中的每一个响应多于一个导频信号（178,182,186）来确定。

公开(公告)号：US5799011A

公开(公告)日：1998-08-25

申请号：US808331

申请日：1997-02-28

申请人： Christopher Peter LaRosa ,  Michael John Carney ,  Christopher John Becker ,  Fuyun Ling

发明人： Christopher Peter LaRosa ,  Michael John Carney ,  Christopher John Becker ,  Fuyun Ling

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

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

摘要： By time-sharing demodulator hardware between a primary data path (165), a power control data path (161), and a received signal strength indicator (RSSI) path (163), an entire power control data path (161) can be implemented in a demodulator (140) of a spread spectrum subscriber unit receiver with a low increase in gate count. The primary data path (165) and the power control data path (161) time-share a complex conjugate generator (270), a complex multiplier (280), and a real component extractor (290). Due to timing requirements, though, the channel estimation filter (240) of the primary data path cannot be time-shared with the power control data path. Instead, dynamic coefficient scaling is added to an infinite-duration impulse response (IIR) filter in the RSSI path (163) so that the IIR filter (250) with dynamic coefficient scaling can be time-shared between the RSSI path (163) and the power control data path (161).

摘要翻译： 通过在主要数据路径（165），功率控制数据路径（161）和接收信号强度指示（RSSI）路径（163）之间的时间共享解调器硬件，可以实现整个功率控制数据路径（161） 在扩频器用户单元接收机的解调器（140）中，门数增加较少。 主数据路径（165）和功率控制数据路径（161）共时分配复共轭发生器（270），复数乘法器（280）和实部分量提取器（290）。 然而，由于时序要求，主数据路径的信道估计滤波器（240）不能与功率控制数据路径共享。 相反，动态系数缩放被添加到RSSI路径（163）中的无限持续脉冲响应（IIR）滤波器，使得具有动态系数缩放的IIR滤波器（250）可以在RSSI路径（163）和 功率控制数据路径（161）。

公开(公告)号：US5767738A

公开(公告)日：1998-06-16

申请号：US734225

申请日：1996-10-21

申请人： Tyler A. Brown ,  Dennis J. Thompson ,  Fuyun Ling

发明人： Tyler A. Brown ,  Dennis J. Thompson ,  Fuyun Ling

IPC分类号： H04L27/22 ,  H04B1/707 ,  H04L1/00 ,  H04L27/227 ,  H04L27/233 ,  H03D3/00

CPC分类号： H04L1/0059 ,  H04B1/707 ,  H04L27/227 ,  H04L27/233

摘要： A receiver (156) includes both a coherent and noncoherent demodulator. When the confidence that estimates of the channel is high, the coherent demodulator is implemented. When the confidence that estimates of the channel is low, the noncoherent demodulator is implemented. A controlling microprocessor (162) controls the selection process and also provides a signal (158) to enable the noncoherent demodulator in instances when noncoherent demodulation would most likely be better than coherent demodulation. As an example, such an instance would be immediately after handoff of a mobile station (505) from a source base-station (503) to a target base-station (502).

摘要翻译： 接收机（156）包括相干和非相干解调器。 当信道估计值高的置信度时，实现了相干解调器。 当信道的估计信心低时，实现非相干解调器。 在非相干解调最有可能优于相干解调的情况下，控制微处理器（162）控制选择过程并且还提供信号（158）以使能非相干解调器。 作为示例，这样的实例将在移动站（505）从源基站（503）切换到目标基站（502）之后立即。

公开(公告)号：US5754599A

公开(公告)日：1998-05-19

申请号：US582856

申请日：1996-01-04

申请人： Fuyun Ling ,  Terry Michael Schaffner

发明人： Fuyun Ling ,  Terry Michael Schaffner

IPC分类号： H04J13/04 ,  H03M13/23 ,  H03M13/45 ,  H04L25/02 ,  H04L27/06

CPC分类号： H04L25/0236 ,  H04L25/0214

摘要： Generally stated, a receiver in a communication system implements coherent channel estimation by first receiving an encoded signal and then generating a complex channel estimate from the encoded signal. The receiver then combines the complex channel estimate with the encoded signal to produce a coherent demodulated signal. After combining, the receiver decodes a version of the coherent demodulated signal to produce an estimate of the encoded signal prior to encoding.

摘要翻译： 通常，通信系统中的接收机通过首先接收编码信号然后从编码信号产生复数信道估计来实现相干信道估计。 然后，接收机将复杂信道估计与编码信号组合以产生相干解调信号。 在组合之后，接收机对相干解调信号的版本进行解码，以在编码之前产生编码信号的估计。

公开(公告)号：US5640431A

公开(公告)日：1997-06-17

申请号：US402260

申请日：1995-03-10

申请人： Eugene J. Bruckert ,  Fuyun Ling ,  Thomas A. Sexton

发明人： Eugene J. Bruckert ,  Fuyun Ling ,  Thomas A. Sexton

IPC分类号： H04L27/00 ,  H04L27/233 ,  H04K1/00 ,  H03L7/06

CPC分类号： H04B1/7087 ,  H04B1/707 ,  H04B1/709 ,  H04L27/2332 ,  H04L2027/003 ,  H04L2027/0046 ,  H04L2027/0065 ,  H04L2027/0079

摘要： A method and apparatus for improved offset frequency estimation includes in a first embodiment a receiver (100) for coherent reception of a signal having known reference information, the receiver including an extractor (106) for extracting the reference information (107) from the signal, and an offset frequency estimator (110). The offset frequency estimator (110) includes a filter (121) for filtering the reference information and outputting a filtered reference sequence; a correlator (122, 124) for correlating the filtered reference sequence against a predetermined reference signal to form correlation values; and a peak detector (126) for determining an offset frequency estimate (131) from the correlation values. Other embodiments are also shown.

摘要翻译： 一种用于改进的偏移频率估计的方法和装置包括在第一实施例中用于相干接收具有已知参考信息的信号的接收机（100），该接收机包括用于从信号中提取参考信息（107）的提取器（106） 和偏移频率估计器（110）。 偏移频率估计器（110）包括滤波器（121），用于对参考信息进行滤波并输出滤波后的参考序列; 相关器（122,124），用于将滤波的参考序列与预定的参考信号相关，以形成相关值; 和用于根据相关值确定偏移频率估计（131）的峰值检测器（126）。 还示出了其他实施例。

公开(公告)号：US5297161A

公开(公告)日：1994-03-22

申请号：US906321

申请日：1992-06-29

申请人： Fuyun Ling

发明人： Fuyun Ling

IPC分类号： H04B1/707 ,  H04B7/005 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04B7/216

CPC分类号： H04W52/228 ,  H04B1/707 ,  H04J13/004 ,  H04W52/225

摘要： A method and apparatus is provided for estimating signal power. The estimating is accomplished by correlating (206) an input data vector (204) with a set of mutually orthogonal codes to generate a set of output values. The input data vector (204) consists of data samples of a received orthogonal coded signal (202). Each output value corresponds to a measure of confidence that the input data vector is substantially similar to one of the orthogonal codes from within the set of mutually orthogonal codes. Finally, an estimate of the power of the received orthogonal coded signal is generated (208) as a nonlinear function of the set output values.

摘要翻译： 提供了一种用于估计信号功率的方法和装置。 通过将输入数据向量（204）与一组相互正交的代码相关（206）来生成一组输出值来实现估计。 输入数据矢量（204）由接收到的正交编码信号（202）的数据样本组成。 每个输出值对应于输入数据向量与互相正交码集合内的正交码之一基本相似的置信度度量。 最后，生成接收的正交编码信号的功率的估计（208）作为设定的输出值的非线性函数。

公开(公告)号：US5216692A

公开(公告)日：1993-06-01

申请号：US860878

申请日：1992-03-31

申请人： Fuyun Ling

发明人： Fuyun Ling

IPC分类号： H04J13/00 ,  H04B7/005

CPC分类号： H04W52/12 ,  H04W52/08 ,  H04W52/225 ,  H04W52/36

摘要： A method and apparatus is provided for maintaining received signal power levels at an average level when a signal power estimate is on average similar to the average of actually received signal power levels. The maintaining of the received signal power levels is accomplished by generating an estimate of the power of a received signal. Subsequently, a difference signal is generated by subtracting the estimated received signal power from a predetermined reference signal power. Finally, a signal power control threshold is adjusted as a function of the difference signal.

摘要翻译： 提供了一种方法和装置，用于当信号功率估计平均类似于实际接收的信号功率电平的平均值时，将接收信号功率电平维持在平均电平。 接收信号功率电平的维持是通过产生对接收信号的功率的估计来实现的。 随后，通过从预定的参考信号功率减去估计的接收信号功率来产生差分信号。 最后，根据差分信号调整信号功率控制阈值。

公开(公告)号：US4987569A

公开(公告)日：1991-01-22

申请号：US333992

申请日：1989-04-05

申请人： Fuyun Ling ,  Guozhu Long

发明人： Fuyun Ling ,  Guozhu Long

IPC分类号： G06F17/10 ,  H04B3/23

CPC分类号： H04B3/237 ,  H04B3/238

摘要： An echo cancellation modem having a fast training echo canceller in which the echo cancellation coefficients are computed by taking correlations between a complex, periodic training signal sequence and a real component of the corresponding echo signal. The modem includes a receiver circuit for detecting a signal on a channel possibly including an echo; an echo canceller for estimating the real component of the echo signal; training circuitry for applying the complex training sequence to the channel and for taking correlations between the training sequence and the real component of the corresponding echo signal. The modem also includes a computational element for computing the period of the periodic sequence, generating the complex periodic train sequence in real time and for computing a phase roll frequency based upon the computed echo cancellation coefficients.

公开(公告)号：US08782112B2

公开(公告)日：2014-07-15

申请号：US13171300

申请日：2011-06-28

申请人： Fuyun Ling ,  Wanlun Zhao

发明人： Fuyun Ling ,  Wanlun Zhao

IPC分类号： G06F17/10

CPC分类号： H04L25/03159 ,  H04L2025/03382 ,  H04L2025/03547 ,  H04L2025/03624

摘要： An improved receiver apparatus and algorithm for equalizing signals in a receiver device may equalize a block of data generated from N data symbols in a single carrier communication system. A first algorithm may be applied to a plurality of signal samples to generate a frequency domain representation of the samples. A channel estimate may be generated and a frequency response of a zero-forcing or a minimum-mean-square equalizer is applied. A conjugate of the computed frequency response is multiplied with a frequency domain representation for each sample to generate a product value. N-aliased frequency domain values from the generated product value may be determined for each of the samples. A second algorithm is applied to the generated N-aliased frequency domain values to generate estimates of the transmitted time domain data symbols.

摘要翻译： 用于对接收机设备中的信号进行均衡的改进的接收机设备和算法可以均衡在单个载波通信系统中从N个数据符号生成的数据块。 可以将第一算法应用于多个信号样本以产生样本的频域表示。 可以产生信道估计，并且应用迫零或均方均衡器的频率响应。 将所计算的频率响应的共轭与每个样本的频域表示相乘以产生乘积值。 可以为每个样本确定来自所生成的乘积值的N个混叠频域值。 将第二种算法应用于所生成的N个混叠频域值以产生传输的时域数据符号的估计。

公开(公告)号：US08250428B2

公开(公告)日：2012-08-21

申请号：US12276313

申请日：2008-11-22

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

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

IPC分类号： H03M13/00

CPC分类号： H04L1/0071 ,  H03M13/27 ,  H03M13/2957 ,  H04L1/0041 ,  H04L2001/0098

摘要： Methods and systems are described for scheduling data in an FLO system. The method may include turbo encoding the data, and dividing a packet of the turbo-coded data into a plurality of subpackets. The method may include scheduling the turbo-coded packet of data so as to distribute the data across multiple frames of a superframe, by transmitting each one of the subpackets during a different frame of the superframe to increase time diversity. The turbo-coded packet of data may comprise systematic bits and parity bits. The method may include separately scheduling the systematic bits and the parity bits during different frames of the superframe.

摘要翻译： 描述了用于在FLO系统中调度数据的方法和系统。 该方法可以包括对数据进行turbo编码，并将turbo编码数据的分组划分成多个子分组。 该方法可以包括通过在超帧的不同帧期间发送每个子分组以增加时间分集来调度数据的turbo编码分组以便分布跨超帧的多个帧的数据。 turbo编码的数据分组可以包括系统比特和奇偶校验比特。 该方法可以包括在超帧的不同帧期间单独地调度系统比特和奇偶校验比特。