公开(公告)号：US20120278690A1

公开(公告)日：2012-11-01

申请号：US13546180

申请日：2012-07-11

Applicant: Xiao-an Wang ,  Jens Berkmann

Inventor： Xiao-an Wang ,  Jens Berkmann

IPC: H03M13/09 ,  G06F11/10

CPC classification number: H03M13/091

Abstract: A description is given of an apparatus that includes a division unit configured to receive a data stream and to divide the received data stream into a plurality of data segments. The apparatus further includes a plurality of first CRC check units, wherein each of the first CRC check units is configured to perform a first CRC check of a respective one of the plurality of data segments, the plurality of first CRC checks being performed concurrently, and wherein each of the first CRC check units is configured to perform a second CRC check based on an output of the respective first CRC check unit.

Abstract translation: 给出了一种包括被配置为接收数据流并将接收的数据流划分成多个数据段的分割单元的装置的描述。 该装置还包括多个第一CRC校验单元，其中第一CRC校验单元中的每一个被配置为执行多个数据段中的相应一个数据段的第一CRC校验，多个第一CRC校验同时执行，以及 其中，所述第一CRC校验单元中的每一个被配置为基于相应的第一CRC校验单元的输出执行第二CRC校验。

公开(公告)号：US08175562B2

公开(公告)日：2012-05-08

申请号：US11553635

申请日：2006-10-27

Applicant: Roger A. Fratti ,  Xiao-an Wang

Inventor： Roger A. Fratti ,  Xiao-an Wang

IPC: H04B1/06

CPC classification number: H03G3/3068

Abstract: An apparatus including automatic gain control (AGC) includes at least one variable gain amplifier (VGA) operative to receive an input signal and to generate an amplified signal. A gain of the VGA is controlled as a function of at least a first control signal. The apparatus further includes an AGC circuit coupled to the VGA and being operative to generate the first control signal. The AGC circuit has a bandwidth that is controlled as a function of at least the amplified signal and a second control signal, the second control signal being indicative of a motion of the apparatus.

Abstract translation: 包括自动增益控制（AGC）的装置包括至少一个可操作以接收输入信号并产生放大信号的可变增益放大器（VGA）。 VGA的增益被控制为至少第一控制信号的函数。 该装置还包括耦合到VGA并可操作以产生第一控制信号的AGC电路。 所述AGC电路具有作为至少所述放大信号和第二控制信号的功能的带宽，所述第二控制信号表示所述装置的运动。

公开(公告)号：US20120263222A1

公开(公告)日：2012-10-18

申请号：US13087943

申请日：2011-04-15

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04L27/06 ,  H04B1/10 ,  H04L27/01

CPC classification number: H04L25/0328 ,  H04L25/03292 ,  H04L25/03331 ,  H04L25/03891

Abstract: A method is described that enables maximum-likelihood (ML) demodulation for MIMO communications over frequency-selective channels. An equalizer is typically employed to suppress inter-symbol interference (ISI) due to frequency-selectiveness of the channel, but the noise of the equalizer output can be highly correlated such that standard ML-MIMO demodulations cannot directly apply. The method comprises first constructing equivalent post-equalization MIMO channel and noise covariance matrix, and then de-correlating the equalizer output so that ML or near-ML MIMO demodulations can be applied to improve the performance. Additionally, successive ISI cancellation (SIC) is described for further performance improvement.

Abstract translation: 描述了一种能够通过频率选择信道进行MIMO通信的最大似然（ML）解调的方法。 通常采用均衡器来抑制由于信道的频率选择性引起的符号间干扰（ISI），但是均衡器输出的噪声可以高度相关，使得标准ML-MIMO解调不能直接应用。 该方法包括首先构建等效的后均衡MIMO信道和噪声协方差矩阵，然后将均衡器输出去相关，使ML或近ML MIMO解调可以应用于提高性能。 另外，为了进一步提高性能，描述了连续的ISI取消（SIC）。

公开(公告)号：US20120243424A1

公开(公告)日：2012-09-27

申请号：US13052691

申请日：2011-03-21

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04L12/26

CPC classification number: H04L25/03955 ,  H04B7/024 ,  H04B7/0626 ,  H04L5/0023 ,  H04L5/0035 ,  H04L5/0048 ,  H04L5/14 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/03904 ,  H04L27/2646 ,  H04L27/2657 ,  H04L27/2675 ,  H04L27/2695 ,  H04W24/00 ,  H04W48/08

Abstract: Methods and apparatus are described that provide carrier-phase difference (CPD) acquisition via signaling protocols between communicating devices. The random CPD between two disjoint devices can be measured by the signaling protocols described herein. With the availability of the CPD, a device is also able to acquire its outgoing channel (transmit channel) information, thus avoiding the channel information feedback that is being considered and/or practiced in some wireless communications systems. Also described are methods and apparatus that use the CPD to synchronize the clocks of two or more devices and that track the time-variations of the CPD for reliable CPD measurement and tracking loop operations. Applications of the described methods and apparatus include wireless multipoint broadcast systems, also known as coordinated multipoint transmission, or CoMP, in LTE (long-term evolution)-advanced systems, point-to-point wireless MIMO systems, and general wireless device networks.

Abstract translation: 描述了通过通信设备之间的信令协议来提供载波相位差（CPD）采集的方法和装置。 可以通过本文描述的信令协议来测量两个不相交设备之间的随机CPD。 随着CPD的可用性，设备还能够获取其输出信道（发送信道）信息，从而避免在某些无线通信系统中正在考虑和/或实践的信道信息反馈。 还描述了使用CPD来同步两个或更多个设备的时钟并跟踪CPD的时间变化以用于可靠的CPD测量和跟踪循环操作的方法和装置。 所描述的方法和装置的应用包括LTE（长期演进） - 高级系统，点对点无线MIMO系统和一般无线设备网络中的无线多点广播系统，也称为协调多点传输，或CoMP。

公开(公告)号：US07974997B2

公开(公告)日：2011-07-05

申请号：US11731174

申请日：2007-03-30

Applicant: Eliahou Arviv ,  Robert L. Lang ,  Yi-Chen Li ,  Oliver Ridler ,  Xiao-an Wang

Inventor： Eliahou Arviv ,  Robert L. Lang ,  Yi-Chen Li ,  Oliver Ridler ,  Xiao-an Wang

IPC: G06F17/16

CPC classification number: G06F17/16 ,  H04B1/707 ,  H04B2201/70707 ,  H04B2201/709727

Abstract: In one embodiment, a receiver including one or more signal-processing blocks and a hardware-based matrix co-processor. The one or more signal-processing blocks are adapted to generate a processed signal from a received signal. The hardware-based matrix co-processor includes two or more different matrix-computation engines, each adapted to perform a different matrix computation, and one or more shared hardware-computation units, each adapted to perform a mathematical operation. At least one signal-processing block is adapted to offload matrix-based signal processing to the hardware-based matrix co-processor. Each of the two or more different matrix-computation engines is adapted to offload the same type of mathematical processing to at least one of the one or more shared hardware-computation units.

Abstract translation: 在一个实施例中，接收机包括一个或多个信号处理块和基于硬件的矩阵协处理器。 所述一个或多个信号处理块适于从接收到的信号产生经处理的信号。 基于硬件的矩阵协处理器包括两个或更多个不同的矩阵计算引擎，每个矩阵计算引擎适于执行不同的矩阵计算，以及一个或多个共享硬件计算单元，每个共享硬件计算单元适于执行数学运算。 至少一个信号处理块适于将基于矩阵的信号处理卸载到基于硬件的矩阵协处理器。 两个或更多个不同的矩阵计算引擎中的每一个适于将相同类型的数学处理卸载到一个或多个共享硬件计算单元中的至少一个。

公开(公告)号：US20080243982A1

公开(公告)日：2008-10-02

申请号：US11731174

申请日：2007-03-30

Applicant: Eliahou Arviv ,  Robert L. Lang ,  Yi-Chen Li ,  Oliver Ridler ,  Xiao-an Wang

Inventor： Eliahou Arviv ,  Robert L. Lang ,  Yi-Chen Li ,  Oliver Ridler ,  Xiao-an Wang

IPC: G06F17/10 ,  G06F7/32

CPC classification number: G06F17/16 ,  H04B1/707 ,  H04B2201/70707 ,  H04B2201/709727

Abstract: In one embodiment, a receiver including one or more signal-processing blocks and a hardware-based matrix co-processor. The one or more signal-processing blocks are adapted to generate a processed signal from a received signal. The hardware-based matrix co-processor includes two or more different matrix-computation engines, each adapted to perform a different matrix computation, and one or more shared hardware-computation units, each adapted to perform a mathematical operation. At least one signal-processing block is adapted to offload matrix-based signal processing to the hardware-based matrix co-processor. Each of the two or more different matrix-computation engines is adapted to offload the same type of mathematical processing to at least one of the one or more shared hardware-computation units.

Abstract translation: 在一个实施例中，接收机包括一个或多个信号处理块和基于硬件的矩阵协处理器。 所述一个或多个信号处理块适于从接收到的信号产生经处理的信号。 基于硬件的矩阵协处理器包括两个或更多个不同的矩阵计算引擎，每个矩阵计算引擎适于执行不同的矩阵计算，以及一个或多个共享硬件计算单元，每个共享硬件计算单元适于执行数学运算。 至少一个信号处理块适于将基于矩阵的信号处理卸载到基于硬件的矩阵协处理器。 两个或更多个不同的矩阵计算引擎中的每一个适于将相同类型的数学处理卸载到一个或多个共享硬件计算单元中的至少一个。

公开(公告)号：US20050152486A1

公开(公告)日：2005-07-14

申请号：US10754340

申请日：2004-01-09

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H03H7/30 ,  H03K5/159 ,  H04B1/10 ,  H04L1/06 ,  H04L1/20 ,  H04L25/03

CPC classification number: H04B1/712 ,  H04B2201/709727 ,  H04L1/20 ,  H04L25/03038 ,  H04L2025/03375 ,  H04L2025/03605 ,  H04L2025/03643

Abstract: Methods of recovering data in a received signal sent in a communications media are disclosed. Composite channel impulse responses are first estimated. Channel-tap locations are then assigned to suppress the interference noises by sequential search schemes or heuristic search schemes based on estimated composite channel impulse responses. A sequential search scheme optimizes a predetermined design criterion in a sequential manner. Also described are recursive evaluations of the design criterion and the inverses of the noise covariance matrices based on the composite channel impulse response during a sequential search. A heuristic search scheme selects channel-tap locations based on a set of pre-selected channel-tap locations. The set of pre-selected channel-tap locations is determined according to the estimated composite channel impulse response. A method of estimating energy levels of known interference sources is also described.

Abstract translation: 公开了在通信介质中发送的接收信号中恢复数据的方法。 首先估计复合信道脉冲响应。 然后分配频道抽头位置以通过基于估计的复合信道脉冲响应的顺序搜索方案或启发式搜索方案来抑制干扰噪声。 顺序搜索方案以顺序方式优化预定的设计标准。 还描述了基于在顺序搜索期间的复合信道脉冲响应的设计标准和噪声协方差矩阵的反演的递归评估。 启发式搜索方案基于一组预先选择的频道抽头位置来选择频道抽头位置。 根据估计的复合信道脉冲响应来确定预先选择的信道抽头位置集合。 还描述了估计已知干扰源的能量水平的方法。

公开(公告)号：US06396411B1

公开(公告)日：2002-05-28

申请号：US09244995

申请日：1999-02-04

Applicant: Dwane A. Bell ,  Xiao-an Wang

Inventor： Dwane A. Bell ,  Xiao-an Wang

IPC: H04L700

CPC classification number: H04J3/0608 ,  H04W56/0085 ,  H04W68/00 ,  H04W88/02

Abstract: A method and apparatus that utilizes soft outputs from a paging device demodulator to perform frame synchronization is provided. The soft outputs are summed after being correlated to a first pattern associated with a paging protocol. The summation is then compared to a frame synchronization threshold. Frame synchronization occurs when the summation reaches the threshold. Using soft outputs, and a summation of the outputs based on a correlation with the first pattern, the method and apparatus require less processing, are more efficient and are more reliable than conventional synchronization schemes.

Abstract translation: 提供了利用来自寻呼装置解调器的软输出执行帧同步的方法和装置。 软输出在与寻呼协议相关联的第一模式相关之后相加。 然后将求和与帧同步阈值进行比较。 当总和达到阈值时，发生帧同步。 使用软输出和基于与第一模式的相关性的输出的总和，所述方法和装置需要较少的处理，比常规同步方案更有效并且更可靠。

公开(公告)号：US20180262368A1

公开(公告)日：2018-09-13

申请号：US15394805

申请日：2016-12-29

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04L25/02

CPC classification number: H04L25/0212 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/025 ,  H04L25/0256

Abstract: Methods and apparatus of channel estimation using time-domain parameter extraction are disclosed. The wireless channel can be modeled by a multipath model with a limited number of parameters in the continuous time domain. Extracting the time-domain parameters and then reconstructing the channel yields channel estimates that have better accuracy. Time-domain parameter extraction also has lower computational complexity than existing methods.

公开(公告)号：US09571305B2

公开(公告)日：2017-02-14

申请号：US13648254

申请日：2012-10-09

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04L12/28 ,  H04L25/02

CPC classification number: H04L25/0212 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/025 ,  H04L25/0256

Abstract: Methods and apparatus of channel estimation using time-domain parameter extraction are disclosed. The wireless channel can be modeled by a multipath model with a limited number of parameters in the continuous time domain. In the discrete time domain, the multipath model leads to channel impulse responses that have a limited number of channel taps with non-negligible energy. Extracting the time-domain parameters and then reconstructing the channel yields channel estimates that have better accuracy. Time-domain parameter extraction also has lower computational complexity than existing methods.

Abstract translation: 公开了使用时域参数提取的信道估计的方法和装置。 无线信道可以由连续时域中具有有限数量的参数的多径模型建模。 在离散时域中，多径模型导致信道脉冲响应具有有限数量的具有不可忽略能量的信道抽头。 提取时域参数，然后重建信道，产生具有更好精度的信道估计。 时域参数提取还具有比现有方法更低的计算复杂度。