公开(公告)号：US20100125777A1

公开(公告)日：2010-05-20

申请号：US12271553

申请日：2008-11-14

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 and a plurality of first CRC check units, wherein each of the first CRC units is configured to perform a CRC check of a respective one of the plurality of segments of data, and wherein the plurality of CRC checks are performed concurrently.

Abstract translation: 给出了一种包括分配单元的设备的描述，该分割单元被配置为接收数据流并将接收的数据流划分为多个数据段和多个第一CRC校验单元，其中每个第一CRC单元被配置为 执行所述多个数据段中的相应一个的CRC校验，并且其中所述多个CRC校验同时执行。

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：US09106259B2

公开(公告)日：2015-08-11

申请号：US13546180

申请日：2012-07-11

Applicant: Xiao-an Wang ,  Jens Berkmann

Inventor： Xiao-an Wang ,  Jens Berkmann

IPC: G06F11/10 ,  H03M13/00 ,  H03M13/09

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：US08261175B2

公开(公告)日：2012-09-04

申请号：US12271553

申请日：2008-11-14

Applicant: Xiao-an Wang ,  Jens Berkmann

Inventor： Xiao-an Wang ,  Jens Berkmann

IPC: G06F11/10 ,  H03M13/00

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 and a plurality of first CRC check units, wherein each of the first CRC units is configured to perform a CRC check of a respective one of the plurality of segments of data, and wherein the plurality of CRC checks are performed concurrently.

Abstract translation: 给出了一种包括分配单元的设备的描述，该分割单元被配置为接收数据流并将接收的数据流划分为多个数据段和多个第一CRC校验单元，其中每个第一CRC单元被配置为 执行所述多个数据段中的相应一个的CRC校验，并且其中所述多个CRC校验同时执行。

公开(公告)号：US10454664B2

公开(公告)日：2019-10-22

申请号：US15869042

申请日：2018-01-12

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04L5/14 ,  H04W72/04 ,  H04W56/00 ,  H04L5/00 ,  H04B7/0452 ,  H04W88/08

Abstract: Multipoint broadcasting relying on channel reciprocity in a TDD network requires that the broadcasters be calibrated. In the cases where the relative amplitude profiles and nonlinear phases are time-invariant or slow-varying, broadcaster calibration reduces to phase synchronization. Methods and apparatus are described that provide broadcaster calibration and phase synchronization with terminal feedback and overcome the drawbacks of self-calibration. The methods and apparatus are capable of calibrating hundreds of broadcaster antennas in massive antenna applications while maintaining an extremely low overhead. Applications of the described methods and apparatus include multipoint broadcasting in wireless networks, also known as coordinated multipoint transmission, or CoMP, in LTE-A (long-term evolution, advanced) networks, and distributed MIMO, massive MIMO, massive beamforming, etc., in other networks including 5G and 802.11. Applications also include frequency and phase synchronization of a cluster of wireless devices.

公开(公告)号：US20190222406A1

公开(公告)日：2019-07-18

申请号：US15869042

申请日：2018-01-12

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04L5/14 ,  H04W72/04 ,  H04L5/00 ,  H04W56/00

Abstract: Multipoint broadcasting relying on channel reciprocity in a TDD network requires that the broadcasters be calibrated. In the cases where the relative amplitude profiles and nonlinear phases are time-invariant or slow-varying, broadcaster calibration reduces to phase synchronization. Methods and apparatus are described that provide broadcaster calibration and phase synchronization with terminal feedback and overcome the drawbacks of self-calibration. The methods and apparatus are capable of calibrating hundreds of broadcaster antennas in massive antenna applications while maintaining an extremely low overhead. Applications of the described methods and apparatus include multipoint broadcasting in wireless networks, also known as coordinated multipoint transmission, or CoMP, in LTE-A (long-term evolution, advanced) networks, and distributed MIMO, massive MIMO, massive beamforming, etc., in other networks including 5G and 802.11. Applications also include frequency and phase synchronization of a cluster of wireless devices.

公开(公告)号：US09137077B2

公开(公告)日：2015-09-15

申请号：US13293813

申请日：2011-11-10

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04B1/00 ,  H04L27/26 ,  H04L25/02 ,  H04L5/00 ,  H04L25/03

CPC classification number: H04L27/2613 ,  H04L5/0016 ,  H04L5/0023 ,  H04L5/0035 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0224 ,  H04L2025/03426

Abstract: Large-dimension MIMO and multipoint broadcasting in new generation of wireless networks create high demand for various types of pilots in transmission signals for channel estimation, data demodulation, synchronization, etc. More pilots, as in existing networks, use more resources and thus diminish the network capacity. Methods and apparatus of heterogeneous pilots are disclosed. A heterogeneous pilot has its own signal characteristics that are different from the primary information-bearing signals in the network. Heterogeneous pilots can be spread-spectrum signals in an OFDM-based wireless network. Heterogeneous pilots use no network resources, and can be as many as desired, and can be designed to have versatile utilities. Also described are methods and apparatus of heterogeneous pilot cancellation that minimizes the interference of heterogeneous pilots on the primary information-bearing signals. Applications of the described methods and apparatus include OFDM-based wireless cellular networks, such as LTE-advanced and Wireless LAN.

Abstract translation: 新一代无线网络中的大尺寸MIMO和多点广播对于信道估计，数据解调，同步等传输信号中的各种类型的导频产生了高需求。如现有网络中更多的飞行员使用更多的资源，从而减少 网络容量。 披露了异质飞行员的方法和装置。 异构导频具有与网络中的主要信息承载信号不同的信号特征。 异构导频可以是基于OFDM的无线网络中的扩频信号。 异构飞行员不使用网络资源，并且可以根据需要而设计，并且可以被设计为具有通用的实用程序。 还描述了使异构导频对主要信息承载信号的干扰最小化的异构导频消除的方法和装置。 所描述的方法和装置的应用包括基于OFDM的无线蜂窝网络，诸如LTE高级和无线LAN。

公开(公告)号：US09125074B2

公开(公告)日：2015-09-01

申请号：US13854130

申请日：2013-03-31

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04W24/02 ,  H04B7/04 ,  H04W16/28 ,  H04B7/02

CPC classification number: H04W24/02 ,  H04B7/024 ,  H04B7/0452 ,  H04W16/28

Abstract: MU-MIMO and CoMP have potentials to increase the cell capacity by many folds. Interferences and channel feedback overhead, however, severely limits such potentials. Method of reference signal-based grid of beams (RS-GOB) is described. RS-GOB distributes the effective antennas of a base station into multiple beams, thereby significantly reducing the feedback overhead of CoMP and making effective use of CoMP to turn the interferences into cooperating useful signals. RS-GOB also reduces the need for small HetNet cells, which mitigates the interferences of small HetNet cells on macro cells.

Abstract translation: MU-MIMO和CoMP具有将细胞容量增加许多倍的潜力。 然而，干扰和渠道反馈开销严重限制了这种潜力。 描述了基于信号的光束网格（RS-GOB）的方法。 RS-GOB将基站的有效天线分配到多个波束中，从而大大减少了CoMP的反馈开销，并有效利用了CoMP将干扰转化为合作的有用信号。 RS-GOB还减少了对小型HetNet电池的需求，从而减轻了小型HetNet电池在宏电池上的干扰。

公开(公告)号：US08705647B2

公开(公告)日：2014-04-22

申请号：US13087943

申请日：2011-04-15

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04B7/02

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：US20140233684A1

公开(公告)日：2014-08-21

申请号：US13769250

申请日：2013-02-15

Applicant: Xiao-an Wang

Inventor： Xiao-an Wang

IPC: H04L25/02

CPC classification number: H04L25/0204

Abstract: Most wireless channels are sparse, so sparse channel-based methods can be used for channel estimation and feedback with much better estimation accuracy and much lower feedback overhead. However, certain wireless channels can be non-sparse, for which sparse channel-based methods may cause degraded estimation quality and increased feedback overhead. Means of detecting the channel sparseness are described that provide simple and effective channel sparseness indicators and safeguard against the mismatch between non-sparse channels and sparse channel-based methods. Various fallback options can be used under non-sparse channels such that estimation degradation and feedback overhead are both minimized. Fake multipath removal in continuous time-domain parameter extraction, a sparse channel-based method, is also described that further improves estimation quality and reduces feedback overhead.

Abstract translation: 大多数无线信道是稀疏的，因此基于信道的稀疏方法可以用于信道估计和反馈，具有更好的估计精度和更低的反馈开销。 然而，某些无线信道可以是非稀疏的，对于这些信道，基于信道的稀疏方法可能导致估计质量下降和增加的反馈开销。 描述了检测通道稀疏度的手段，其提供简单有效的信道稀疏指示符，并且防止非稀疏信道与基于信道的稀疏信道之间的不匹配。 可以在非稀疏信道下使用各种备用选项，从而将估计降级和反馈开销都最小化。 还描述了连续时域参数提取中的虚拟多径去除，这是一种基于稀疏信道的方法，可进一步提高估计质量并降低反馈开销。