公开(公告)号：US20060148506A1

公开(公告)日：2006-07-06

申请号：US11027102

申请日：2004-12-31

Applicant: Min Chuin Hoo

Inventor： Min Chuin Hoo

IPC: H04B7/00

CPC classification number: H04B7/0891 ,  H04B7/0413 ,  H04B7/0848 ,  H04L1/206 ,  H04L25/03216 ,  H04L2025/03426 ,  H04L2025/03535

Abstract: An adaptive, reduced-complexity soft-output maximum-likelihood detector that is operable to process data by adaptively selecting a processing scheme based on a determination of signal quality. The signal quality is derived as a function of the noise, the modulation format, the channel (the communication environment), the transmit signal power and the receive signal power. If the signal quality is low, the signal is processed using a maximum likelihood detector. If, however, the signal quality is high, a simpler sub-optimal detector is used. By estimating the signal quality and choosing an appropriate detection method, the present invention ensures accurate detection of incoming data signals in a MIMO communication system while maintaining the highest possible processing speed.

Abstract translation: 一种自适应，低复杂度的软输出最大似然检测器，其可操作以通过基于信号质量的确定自适应地选择处理方案来处理数据。 信号质量作为噪声，调制格式，信道（通信环境），发射信号功率和接收信号功率的函数导出。 如果信号质量低，则使用最大似然检测器处理信号。 然而，如果信号质量高，则使用更简单的次优检测器。 通过估计信号质量并选择适当的检测方法，本发明在保持尽可能高的处理速度的同时确保在MIMO通信系统中准确检测输入数据信号。

公开(公告)号：US08654892B2

公开(公告)日：2014-02-18

申请号：US13754850

申请日：2013-01-30

Applicant: Carlos H. Aldana ,  Amit G. Bagchi ,  Min Chuin Hoo

Inventor： Carlos H. Aldana ,  Amit G. Bagchi ,  Min Chuin Hoo

IPC: H04L27/00

CPC classification number: H04B7/0613 ,  H04L1/0059 ,  H04L1/0071 ,  H04L27/2608

Abstract: An arrangement of interleavers allocates bits from an input symbol across sub-symbols transmitted via sub-carriers of multiple orthogonal frequency division multiplex (OFDM) carriers. The input bits are allocated in a fashion to provide separation across subcarriers, and rotation of sub-symbols across the OFDM carriers provides additional robustness in the present of signal path impairments.

Abstract translation: 交织器的布置分配来自多个正交频分复用（OFDM）载波的子载波发送的子符号之间的输入符号的比特。 以一种方式分配输入比特以提供跨子载波的​​分离，并且跨OFDM载波的子符号的旋转在信号路径损伤的当前提供额外的鲁棒性。

公开(公告)号：US07917116B2

公开(公告)日：2011-03-29

申请号：US12498003

申请日：2009-07-06

Applicant: Min Chuin Hoo ,  Rajendra Tushar Moorti

Inventor： Min Chuin Hoo ,  Rajendra Tushar Moorti

IPC: H04B7/00

CPC classification number: H04B7/0814 ,  H04B7/0608

Abstract: Certain embodiments of the invention may be found in a method and system for antenna selection diversity with prediction. An antenna diversity system may use information that it has stored on the antenna selection process in previous frames to predict the starting receiving antenna and the starting transmission antenna for the next frame. The prediction may be based on which antennas were selected in previous frames or may be based metrics associated with performance of the antennas. Prediction may be based on a majority polling scheme of previously selected antennas in a determined number of previous frames. Prediction may also be based on a weighted sum of at least one selection metric for all antennas in a determined number of previous frames. Antenna prediction provides a significant performance improvement by reducing the processing and operational overhead in cases where a transmit or a receive antenna dominates.

Abstract translation: 可以在用于具有预测的天线选择分集的方法和系统中找到本发明的某些实施例。 天线分集系统可以使用其在先前帧中的天线选择过程上存储的信息来预测起始接收天线和下一帧的起始发射天线。 预测可以基于在先前帧中选择哪些天线或者可以是与天线的性能相关联的基于度量的度量。 预测可以基于在确定数量的先前帧中的先前选择的天线的多数轮询方案。 预测还可以基于确定数量的先前帧中的所有天线的至少一个选择度量的加权和。 天线预测通过在发射或接收天线占主导地位的情况下减少处理和操作开销来提供显着的性能改进。

公开(公告)号：US07773690B2

公开(公告)日：2010-08-10

申请号：US11821876

申请日：2007-06-26

Applicant: Min Chuin Hoo ,  Rajendra Tushar Moorti

Inventor： Min Chuin Hoo ,  Rajendra Tushar Moorti

IPC: H04L27/00

CPC classification number: H04L27/2657 ,  H04L1/0631 ,  H04L1/0668 ,  H04L25/03159 ,  H04L27/2675 ,  H04L27/2695

Abstract: Angle estimation for modulated signal. A novel compensation technique is presented by which angle estimation may be performed for a modulated signal. More specifically, the angle between a constellation corresponding to a received signal and a constellation corresponding to a received signal may be very efficiently estimated using any one of the possible embodiments corresponding to various aspects of the invention. After this angle has been estimated, the received signal or the expected constellation may be rotated (or de-rotated) to compensate for this angular difference. In doing so, better estimates of the information bits that are demodulated and decoded from the received signal may be made. This approach may be implemented and adapted to any of a wide variety of communication systems including, but not limited to, single-input-multiple-output (SISO), single-input-multiple-output (SIMO), multiple-input-single-output (MISO), multiple-input-multiple-output (MIMO), and even space-time block code (STBC) communication systems or other communication systems.

Abstract translation: 调制信号的角度估计。 提出了一种新颖的补偿技术，可以对调制信号进行角度估计。 更具体地，可以使用对应于本发明的各个方面的任何一个可能的实施例来非常有效地估计对应于接收信号的星座与对应于接收信号的星座之间的角度。 在估计该角度之后，接收信号或预期星座可以被旋转（或去旋转）以补偿该角度差。 在这样做时，可以对从接收信号进行解调和解码的信息比特的更好估计。 这种方法可以被实现和适用于各种通信系统中的任何一种，包括但不限于单输入多输出（SISO），单输入多输出（SIMO），多输入单 输出（MISO），多输入多输出（MIMO），甚至空时块码（STBC）通信系统或其他通信系统。

公开(公告)号：US20100173590A1

公开(公告)日：2010-07-08

申请号：US12725060

申请日：2010-03-16

Applicant: Rajendra Tushar Moorti ,  Min Chuin Hoo ,  Jason Alexander Trachewsky

Inventor： Rajendra Tushar Moorti ,  Min Chuin Hoo ,  Jason Alexander Trachewsky

IPC: H04B15/00

CPC classification number: H04B17/0042 ,  H01Q1/1257 ,  H04B1/1027 ,  H04B7/0805 ,  H04B17/309

Abstract: Methods and systems for choosing at least one signal path are disclosed. Aspects of the method may include determining a signal quality metric for each of a plurality of signal paths, modifying the signal quality metric for each of the plurality of signal paths, and selecting at least one signal path based on at least one modified signal quality metric. At least one of the signal paths may be cycled through and the signal quality metric may be biased and/or increased and/or decreased for each of the plurality of signal paths by a fixed amount and/or by a predetermined amount. The signal quality metric may also be dynamically changed for each of the plurality of signal paths.

Abstract translation: 公开了用于选择至少一个信号路径的方法和系统。 方法的方面可以包括确定多个信号路径中的每一个的信号质量度量，修改多个信号路径中的每一个的信号质量度量，以及基于至少一个修改的信号质量度量来选择至少一个信号路径 。 信号路径中的至少一个可以循环通过，并且信号质量度量可以针对多个信号路径中的每一个以固定量和/或预定量被偏置和/或增加和/或减小。 信号质量度量也可以针对多个信号路径中的每一个动态地改变。

公开(公告)号：US07526037B2

公开(公告)日：2009-04-28

申请号：US11027106

申请日：2004-12-31

Applicant: Min Chuin Hoo

Inventor： Min Chuin Hoo

IPC: H04B7/02

CPC classification number: H04B7/0669

Abstract: A reduced-complexity maximum-likelihood detector is disclosed that provides a high degree of signal detection accuracy while maintaining high processing speeds. The detector processes the received symbols to obtain initial estimates of the transmitted symbols and then uses the initial estimates to generate a plurality of reduced search sets. The reduced search sets are then used to generate decisions for detecting the transmitted symbols.

Abstract translation: 公开了一种降低复杂度的最大似然检测器，其提供高度的信号检测精度，同时保持高的处理速度。 检测器处理接收到的符号以获得发送符号的初始估计，然后使用初始估计来生成多个缩减搜索集合。 然后，缩小的搜索集合用于产生用于检测所发送的符号的决定。

公开(公告)号：US20080159424A1

公开(公告)日：2008-07-03

申请号：US11821876

申请日：2007-06-26

Applicant: Min Chuin Hoo ,  Rajendra Tushar Moorti

Inventor： Min Chuin Hoo ,  Rajendra Tushar Moorti

IPC: H04L27/28

CPC classification number: H04L27/2657 ,  H04L1/0631 ,  H04L1/0668 ,  H04L25/03159 ,  H04L27/2675 ,  H04L27/2695

Abstract: Angle estimation for modulated signal. A novel compensation technique is presented by which angle estimation may be performed for a modulated signal. More specifically, the angle between a constellation corresponding to a received signal and a constellation corresponding to a received signal may be very efficiently estimated using any one of the possible embodiments corresponding to various aspects of the invention. After this angle has been estimated, the received signal or the expected constellation may be rotated (or de-rotated) to compensate for this angular difference. In doing so, better estimates of the information bits that are demodulated and decoded from the received signal may be made. This approach may be implemented and adapted to any of a wide variety of communication systems including, but not limited to, single-input-multiple-output (SISO), single-input-multiple-output (SIMO), multiple-input-single-output (MISO), multiple-input-multiple-output (MIMO), and even space-time block code (STBC) communication systems or other communication systems.

Abstract translation: 调制信号的角度估计。 提出了一种新颖的补偿技术，可以对调制信号进行角度估计。 更具体地，可以使用对应于本发明的各个方面的任何一个可能的实施例来非常有效地估计对应于接收信号的星座与对应于接收信号的星座之间的角度。 在估计该角度之后，接收信号或预期星座可以被旋转（或去旋转）以补偿该角度差。 在这样做时，可以对从接收信号进行解调和解码的信息比特的更好估计。 这种方法可以被实现和适用于各种通信系统中的任何一种，包括但不限于单输入多输出（SISO），单输入多输出（SIMO），多输入单 输出（MISO），多输入多输出（MIMO），甚至空时块码（STBC）通信系统或其他通信系统。

公开(公告)号：US08934572B2

公开(公告)日：2015-01-13

申请号：US13217830

申请日：2011-08-25

Applicant: Jun Zheng ,  Min Chuin Hoo ,  Vinko Erceg

Inventor： Jun Zheng ,  Min Chuin Hoo ,  Vinko Erceg

IPC: H04K1/02 ,  H04L5/00 ,  H04L27/26 ,  H04L25/03

CPC classification number: H04L27/227 ,  H04B7/084 ,  H04L5/0026 ,  H04L5/0048 ,  H04L25/03866 ,  H04L27/20 ,  H04L27/2613 ,  H04L27/2621

Abstract: Phase rotation for preambles within multiple user, multiple access, and/or MIMO wireless communications. An appropriately designed phase rotation vector and/or appropriately designed cyclic shift delays (CSDs) are applied to respective sub-band components of the preamble. With appropriately designed CSDs, certain fields within the preamble are not modified. For example, a legacy short training field (L-STF) of the preamble is not changed when using appropriately designed CSDs. The respective CSDs may be implemented as integer multiples of a common CSD (e.g., 0×CSD, 1×CSD, 2×CSD, etc. such that one of the values of such a CSD vector may be zero [0], another may be the common CSD itself, etc.). Also, by employing an appropriately designed phase rotation vector and integer multiples of a CSD to a preamble, the respective peak to average power ratio (PAPR) between different respective fields within the preamble may be minimized.

Abstract translation: 在多用户，多路访问和/或MIMO无线通信中的前导码的相位旋转。 将适当设计的相位旋转矢量和/或适当设计的循环移位延迟（CSD）应用于前导码的各个子带分量。 通过适当设计的CSD，前导码中的某些字段不会被修改。 例如，使用适当设计的CSD时，前导码的传统短训练字段（L-STF）不会改变。 相应的CSD可以实现为公共CSD的整数倍（例如，0×CSD，1×CSD，2×CSD等，使得这样的CSD向量的值之一可以为零[0]，另一个可以 成为常见的CSD本身等）。 此外，通过将适当设计的相位旋转向量和CSD的整数倍应用于前同步码，可以使前导码内的不同相应场之间的相应峰均功率比（PAPR）最小化。

公开(公告)号：US08139659B2

公开(公告)日：2012-03-20

申请号：US11137259

申请日：2005-05-25

Applicant: Carlos H. Aldana ,  Amit G. Bagchi ,  Min Chuin Hoo

Inventor： Carlos H. Aldana ,  Amit G. Bagchi ,  Min Chuin Hoo

IPC: H04K1/10

CPC classification number: H04B7/0613 ,  H04L1/0059 ,  H04L1/0071 ,  H04L27/2608

Abstract: An arrangement of interleavers allocates bits from an input symbol across sub-symbols transmitted via sub-carriers of multiple orthogonal frequency division multiplex (OFDM) carriers. The input bits are allocated in a fashion to provide separation across subcarriers, and rotation of sub-symbols across the OFDM carriers provides additional robustness in the present of signal path impairments.

Abstract translation: 交织器的布置分配来自多个正交频分复用（OFDM）载波的子载波发送的子符号之间的输入符号的比特。 以一种方式分配输入比特以提供跨子载波的​​分离，并且跨OFDM载波的子符号的旋转在信号路径损伤的当前提供额外的鲁棒性。

公开(公告)号：US20120051454A1

公开(公告)日：2012-03-01

申请号：US13217830

申请日：2011-08-25

Applicant: Jun Zheng ,  Min Chuin Hoo ,  Vinko Erceg

Inventor： Jun Zheng ,  Min Chuin Hoo ,  Vinko Erceg

IPC: H04L27/00

CPC classification number: H04L27/227 ,  H04B7/084 ,  H04L5/0026 ,  H04L5/0048 ,  H04L25/03866 ,  H04L27/20 ,  H04L27/2613 ,  H04L27/2621

Abstract: Phase rotation for preambles within multiple user, multiple access, and/or MIMO wireless communications. An appropriately designed phase rotation vector and/or appropriately designed cyclic shift delays (CSDs) are applied to respective sub-band components of the preamble. With appropriately designed CSDs, certain fields within the preamble are not modified. For example, a legacy short training field (L-STF) of the preamble is not changed when using appropriately designed CSDs. The respective CSDs may be implemented as integer multiples of a common CSD (e.g., 0×CSD, 1×CSD, 2×CSD, etc. such that one of the values of such a CSD vector may be zero [0], another may be the common CSD itself, etc.). Also, by employing an appropriately designed phase rotation vector and integer multiples of a CSD to a preamble, the respective peak to average power ratio (PAPR) between different respective fields within the preamble may be minimized.

Abstract translation: 在多用户，多路访问和/或MIMO无线通信中的前导码的相位旋转。 将适当设计的相位旋转矢量和/或适当设计的循环移位延迟（CSD）应用于前导码的各个子带分量。 通过适当设计的CSD，前导码中的某些字段不会被修改。 例如，使用适当设计的CSD时，前导码的传统短训练字段（L-STF）不会改变。 相应的CSD可以实现为公共CSD的整数倍（例如，0×CSD，1×CSD，2×CSD等，使得这样的CSD向量的值之一可以为零[0]，另一个可以 成为常见的CSD本身等）。 此外，通过将适当设计的相位旋转向量和CSD的整数倍应用于前同步码，可以使前导码内的不同相应场之间的相应峰均功率比（PAPR）最小化。