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1. 发明申请

US20120243468A1 SIGNAL COMPRESSION FOR BACKHAUL COMMUNICATIONS USING LINEAR TRANSFORMATIONS 有权
标题翻译：使用线性变换的反向通信的信号压缩
公开(公告)号：US20120243468A1
公开(公告)日：2012-09-27
申请号：US13070414
申请日：2011-03-23
申请人： Dennis Hui , Jung-fu Cheng , Jiann-Ching Guey , Ali S. Khayrallah , Shing-Wa Wong
发明人： Dennis Hui , Jung-fu Cheng , Jiann-Ching Guey , Ali S. Khayrallah , Shing-Wa Wong
IPC分类号： H04W4/00
CPC分类号： H04B7/024 , H03M7/3068 , H03M7/3082
摘要： A compression/decompression method for backhaul communication of a complex-valued radio signal between base stations and the network processing unit, such as a Central Processor of a Coordinated MultiPoint (CoMP) system, significantly reduces backhaul bandwidth. The spatial and temporal correlations of the wireless IQ signal are exploited in order to remove redundancy and substantially reduce signal bandwidth. Feature component signals of significance are extracted through linear transformation to form the radio signal, and are individually quantized, possibly at different bit rates in accordance with their relative importance. The transformation can either be pre-determined or computed in real-time based on the spatial and temporal statistics of the radio signal. In the latter case, the transformation matrix or matrices are also sent over the backhaul in order to allow the radio signal to be reconstructed at the receiving end. Different methods of generating the transformation matrices are proposed.
摘要翻译：用于基站和诸如协调多点（CoMP）系统的中央处理器的网络处理单元之间的复数无线电信号的回程通信的压缩/解压缩方法显着地减少了回程带宽。利用无线IQ信号的空间和时间相关性来消除冗余并显着降低信号带宽。通过线性变换提取有意义的特征分量信号以形成无线电信号，并且可以根据其相对重要性以不同的比特率单独量化。可以基于无线电信号的空间和时间统计来实时地进行转换或者实时地进行转换。在后一种情况下，转换矩阵或矩阵也通过回程发送，以允许在接收端重建无线电信号。提出了生成转换矩阵的不同方法。

2. 发明授权

US06359935B1 Method for iterative demodulation and decoding for a system with coding and differential demodulation 有权
标题翻译：用于具有编码和差分解调的系统的迭代解调和解码方法
公开(公告)号：US06359935B1
公开(公告)日：2002-03-19
申请号：US09317782
申请日：1999-05-24
申请人： Dennis Hui , Ali S. Khayrallah
发明人： Dennis Hui , Ali S. Khayrallah
IPC分类号： H04L3202
CPC分类号： H04L1/005 , H04L1/0059 , H04L1/0061 , H04L1/0065 , H04L1/0068 , H04L1/0071 , H04L27/2332 , H04L2001/0098
摘要： A receiver (300) for a communication device (102) includes a multiple symbol differential demodulator (304, 316) and a convolutional decoder (308) and a feedback loop (313). The feedback is used to improve the quality of the demodulation during a second pass through the demodulator. The demodulator has a trellis structure which reduces complexity.
摘要翻译：用于通信设备（102）的接收机（300）包括多符号差分解调器（304,316）和卷积解码器（308）和反馈回路（313）。反馈用于在通过解调器的第二次通过期间提高解调的质量。解调器具有网格结构，降低了复杂度。

3. 发明授权

US08948138B2 Signal compression for backhaul communications using linear transformations 有权
标题翻译：使用线性变换的回程通信的信号压缩
公开(公告)号：US08948138B2
公开(公告)日：2015-02-03
申请号：US13070414
申请日：2011-03-23
申请人： Dennis Hui , Jung-Fu Cheng , Jiann-Ching Guey , Ali S. Khayrallah , Shing-Wa Wong
发明人： Dennis Hui , Jung-Fu Cheng , Jiann-Ching Guey , Ali S. Khayrallah , Shing-Wa Wong
IPC分类号： H04W4/00 , H04B7/02 , H03M7/30
CPC分类号： H04B7/024 , H03M7/3068 , H03M7/3082
摘要： A compression/decompression method for backhaul communication of a complex-valued radio signal between base stations and the network processing unit, such as a Central Processor of a Coordinated MultiPoint (CoMP) system, significantly reduces backhaul bandwidth. The spatial and temporal correlations of the wireless IQ signal are exploited in order to remove redundancy and substantially reduce signal bandwidth. Feature component signals of significance are extracted through linear transformation to form the radio signal, and are individually quantized, possibly at different bit rates in accordance with their relative importance. The transformation can either be pre-determined or computed in real-time based on the spatial and temporal statistics of the radio signal. In the latter case, the transformation matrix or matrices are also sent over the backhaul in order to allow the radio signal to be reconstructed at the receiving end. Different methods of generating the transformation matrices are proposed.
摘要翻译：用于基站和诸如协调多点（CoMP）系统的中央处理器的网络处理单元之间的复数无线电信号的回程通信的压缩/解压缩方法显着地减少了回程带宽。利用无线IQ信号的空间和时间相关性来消除冗余并显着降低信号带宽。通过线性变换提取有意义的特征分量信号以形成无线电信号，并且可以根据其相对重要性以不同的比特率单独量化。可以基于无线电信号的空间和时间统计来实时地进行转换或者实时地进行转换。在后一种情况下，转换矩阵或矩阵也通过回程发送，以允许在接收端重建无线电信号。提出了生成转换矩阵的不同方法。

4. 发明申请

US20130136210A1 Metric Corrections for Demodulators Using Serial Localization with Indecision 有权
标题翻译：使用串行本地化的解调器的公制校正与犹豫不决
公开(公告)号：US20130136210A1
公开(公告)日：2013-05-30
申请号：US13306232
申请日：2011-11-29
申请人： Ali S. Khayrallah , Dennis Hui
发明人： Ali S. Khayrallah , Dennis Hui
IPC分类号： H04L27/06 , H03D1/24
CPC分类号： H04L25/03229 , H04L25/03012 , H04L25/0328 , H04L25/03305 , H04L27/3416 , H04L27/38 , H04L2025/0342 , H04L2025/03426
摘要： Demodulation methods and apparatus for a multi-stage SLI demodulator are disclosed. Residual signals from each demodulation stage are modeled as finite sets of unresolved signals and a new metric is introduced for use in search of best candidate symbol estimates. The metric may be evaluated based on a probability distribution function of the residual signals or a probability mass function of the unresolved signals. The metric may also be approximated by the sum of a conventional Euclidean metric and a correction metric. The best candidate symbol estimates generated from each stage of the multi-stage SLI demodulator are summed to form cumulative symbol estimates.
摘要翻译：公开了一种用于多级SLI解调器的解调方法和装置。来自每个解调级的残余信号被建模为有限的未解决信号组，并且引入新的度量用于搜索最佳候选符号估计。可以基于剩余信号的概率分布函数或未解决的信号的概率质量函数来评估度量。该度量也可以通过常规欧几里德度量和校正度量的总和来近似。从多级SLI解调器的每个级产生的最佳候选符号估计被相加以形成累积符号估计。

5. 发明授权

US08798215B2 Metric corrections for demodulators using serial localization with indecision 有权
标题翻译：解调器的公制校正使用串行定位与犹豫不决
公开(公告)号：US08798215B2
公开(公告)日：2014-08-05
申请号：US13306232
申请日：2011-11-29
申请人： Ali S. Khayrallah , Dennis Hui
发明人： Ali S. Khayrallah , Dennis Hui
IPC分类号： H04B7/10
CPC分类号： H04L25/03229 , H04L25/03012 , H04L25/0328 , H04L25/03305 , H04L27/3416 , H04L27/38 , H04L2025/0342 , H04L2025/03426
摘要： Demodulation methods and apparatus for a multi-stage SLI demodulator are disclosed. Residual signals from each demodulation stage are modeled as finite sets of unresolved signals and a new metric is introduced for use in search of best candidate symbol estimates. The metric may be evaluated based on a probability distribution function of the residual signals or a probability mass function of the unresolved signals. The metric may also be approximated by the sum of a conventional Euclidean metric and a correction metric. The best candidate symbol estimates generated from each stage of the multi-stage SLI demodulator are summed to form cumulative symbol estimates.
摘要翻译：公开了一种用于多级SLI解调器的解调方法和装置。来自每个解调级的残余信号被建模为有限的未解决信号组，并且引入新的度量用于搜索最佳候选符号估计。可以基于剩余信号的概率分布函数或未解决的信号的概率质量函数来评估度量。该度量也可以通过常规欧几里德度量和校正度量的总和来近似。从多级SLI解调器的每个级产生的最佳候选符号估计被相加以形成累积符号估计。

6. 发明授权

US08649453B2 Enhanced metrics for demodulation and soft information generation in the presence of a non-constant envelope modulated interferer 有权
标题翻译：在存在非恒定包络调制干扰源的情况下，用于解调和软信息生成的增强度量
公开(公告)号：US08649453B2
公开(公告)日：2014-02-11
申请号：US13434955
申请日：2012-03-30
申请人： Dennis Hui , Ali S. Khayrallah
发明人： Dennis Hui , Ali S. Khayrallah
IPC分类号： H04K1/10
CPC分类号： H04L27/38 , H04L25/067 , H04L27/2647
摘要： Systems and methods utilize enhanced metrics for demodulation and/or soft bit information generation in the presence of a non-constant envelope modulated interfering signal. In one embodiment, a receiver includes a downconverter and a demodulator. The downconverter receives a radio frequency signal comprising a desired signal, noise, and a non-constant envelope modulated interfering signal, and downconverts the radio frequency signal to provide a downconverted signal. The demodulator demodulates the downconverted signal based on a demodulation metric that models the non-constant envelope modulated interfering signal as a stationary non-Gaussian random process with a probability distribution derived from a modulation constellation of a modulation used for the non-constant envelope modulated interfering signal. In one embodiment, the demodulator outputs demodulated symbols. In another embodiment, the demodulator outputs soft bit information.
摘要翻译：在存在非恒定包络调制干扰信号的情况下，系统和方法利用用于解调和/或软比特信息生成的增强度量。在一个实施例中，接收机包括下变频器和解调器。下变频器接收包括期望信号，噪声和非恒定包络调制干扰信号的射频信号，并且降频变频信号以提供下变频信号。解调器基于解调度量来解调下变频信号，该解调度量将非恒定包络调制干扰信号建模为具有从用于非恒定包络调制干扰的调制的调制星座导出的概率分布的固定非高斯随机过程信号。在一个实施例中，解调器输出解调符号。在另一个实施例中，解调器输出软比特信息。

7. 发明申请

US20130259164A1 ENHANCED METRICS FOR DEMODULATION AND SOFT INFORMATION GENERATION IN THE PRESENCE OF A NON-CONSTANT ENVELOPE MODULATED INTERFERER 有权
标题翻译：用于非稳定环境调制干扰器存在的解调和软件信息生成的增强度量
公开(公告)号：US20130259164A1
公开(公告)日：2013-10-03
申请号：US13434955
申请日：2012-03-30
申请人： Dennis Hui , Ali S. Khayrallah
发明人： Dennis Hui , Ali S. Khayrallah
IPC分类号： H04B1/06 , H04L27/00
CPC分类号： H04L27/38 , H04L25/067 , H04L27/2647
摘要： Systems and methods utilize enhanced metrics for demodulation and/or soft bit information generation in the presence of a non-constant envelope modulated interfering signal. In one embodiment, a receiver includes a downconverter and a demodulator. The downconverter receives a radio frequency signal comprising a desired signal, noise, and a non-constant envelope modulated interfering signal, and downconverts the radio frequency signal to provide a downconverted signal. The demodulator demodulates the downconverted signal based on a demodulation metric that models the non-constant envelope modulated interfering signal as a stationary non-Gaussian random process with a probability distribution derived from a modulation constellation of a modulation used for the non-constant envelope modulated interfering signal. In one embodiment, the demodulator outputs demodulated symbols. In another embodiment, the demodulator outputs soft bit information.
摘要翻译：在存在非恒定包络调制干扰信号的情况下，系统和方法利用用于解调和/或软比特信息生成的增强度量。在一个实施例中，接收机包括下变频器和解调器。下变频器接收包括期望信号，噪声和非恒定包络调制干扰信号的射频信号，并且降频变频信号以提供下变频信号。解调器基于解调度量来解调下变频信号，该解调度量将非恒定包络调制干扰信号建模为具有从用于非恒定包络调制干扰的调制的调制星座导出的概率分布的固定非高斯随机过程信号。在一个实施例中，解调器输出解调符号。在另一个实施例中，解调器输出软比特信息。

8. 发明授权

US06711124B2 Time interval based channel estimation with transmit diversity 有权
标题翻译：基于时间间隔的信道估计与发射分集
公开(公告)号：US06711124B2
公开(公告)日：2004-03-23
申请号：US09866241
申请日：2001-05-25
申请人： Ali S. Khayrallah , Dennis Hui
发明人： Ali S. Khayrallah , Dennis Hui
IPC分类号： H04Q700
CPC分类号： H04L25/0242 , H04B7/0615 , H04B7/0845 , H04L25/0204 , H04L25/0226
摘要： A wireless communication system with transmit diversity scales a training sequence simultaneously transmitted by two or more antennas over two or more time intervals in a manner that allows a receiver to perform channel estimation relative to each antenna. The transmit signal is scaled at each antenna in each time interval by a corresponding scaling value selected from a set of orthogonal scaling values. The receiver develops a channel estimate for each of the time intervals as if there were only one antenna transmitting the training sequence. These channel estimates are then summed or combined for each transmit antenna, using values from the corresponding scaling value matrix column. The orthogonality between scaling value sequences used between the multiple transmit antennas allows the receiver to distinguish the training sequence as received from the individual transmit antennas, and to thus perform channel estimation with respect to each transmit antenna.
摘要翻译：具有发射分集的无线通信系统以允许接收机相对于每个天线执行信道估计的方式，在两个或更多个时间间隔上对由两个或更多个天线同时发送的训练序列进行缩放。发送信号在每个时间间隔的每个天线处按照从一组正交缩放值中选择的对应的缩放值进行缩放。接收机为每个时间间隔形成信道估计，就好像只有一个天线发送训练序列一样。然后，使用来自相应缩放值矩阵列的值，对每个发射天线对这些信道估计进行求和或组合。在多个发射天线之间使用的缩放值序列之间的正交性允许接收机将接收到的训练序列与各个发射天线区分开，从而对每个发射天线执行信道估计。

9. 发明授权

US09036684B2 Spatially randomized pilot symbol transmission methods, systems and devices for multiple input/multiple output (MIMO) wireless communications 有权
标题翻译：用于多输入/多输出（MIMO）无线通信的空间随机的导频符号传输方法，系统和设备
公开(公告)号：US09036684B2
公开(公告)日：2015-05-19
申请号：US13247597
申请日：2011-09-28
申请人： Dennis Hui , Kumar Balachandran , Jung-Fu Cheng , Jiann-Ching Guey
发明人： Dennis Hui , Kumar Balachandran , Jung-Fu Cheng , Jiann-Ching Guey
IPC分类号： H04B1/38 , H04B7/04 , H04B7/06 , H04L25/02 , H04L5/00 , H04L25/03
CPC分类号： H04B7/0413 , H04B7/0615 , H04B7/0686 , H04L5/0023 , H04L5/005 , H04L25/0204 , H04L25/0226 , H04L2025/03426
摘要： Compressive sampling is used to generate pilot symbols to be transmitted over an array of antennas in a MIMO wireless communications device. A pilot symbol is transmitted over the array of antennas according to a spatially randomized antenna transmission function that randomly changes across the array of antennas. The randomized antenna transmission function may randomly select/deselect antennas and/or randomly change amplitude and/or phase of the pilot symbol transmission. Channel estimates can be constructed at a receiver based on the spatially randomized pilot symbols that were transmitted.
摘要翻译：压缩采样用于生成将在MIMO无线通信设备中通过天线阵列传输的导频符号。根据在天线阵列上随机变化的空间随机天线传输功能，在天线阵列上传输导频符号。随机天线发送功能可以随机地选择/取消选择天线和/或随机地改变导频符号传输的幅度和/或相位。可以基于发送的空间随机化导频符号在接收机处构造信道估计。

10. 发明授权

US08947993B2 Methods of transmitting using filtering in the time domain and related devices 有权
标题翻译：在时域和相关设备中使用滤波的方法
公开(公告)号：US08947993B2
公开(公告)日：2015-02-03
申请号：US13556818
申请日：2012-07-24
申请人： Chester Park , Dennis Hui
发明人： Chester Park , Dennis Hui
IPC分类号： H04L27/26
CPC分类号： H04L27/2627 , H04L27/2631
摘要： Methods may be provided to transmit data from a wireless terminal operating in a radio access network. For example, sampling rate conversion may be performed on a serial stream of modulation symbols to generate sampling rate converted symbols, and the sampling rate converted symbols may be transmitted over a wireless channel to a node of the radio access network. Related terminals are also discussed.
摘要翻译：可以提供方法来从在无线电接入网络中操作的无线终端发送数据。例如，可以对串行调制符号流执行采样率转换以产生采样率转换的符号，并且可以通过无线信道将采样率转换的符号发送到无线电接入网络的节点。还讨论了相关终端。

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