公开(公告)号：US08428541B2

公开(公告)日：2013-04-23

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: H04B1/10

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

Abstract: A method for choosing at least one signal path is disclosed and may include determining a power level characteristic for each of a plurality of signal paths. The determined power level characteristic for each of the plurality of signal paths may be modified. At least one of the plurality of signal paths may be selected for receiving a signal. The selecting may be based on at least one of the modified power level characteristics. The method may also include cycling through at least one of the signal paths. The power level characteristic for each of the plurality of signal paths may be biased. The power level characteristic for each of the plurality of signal paths may be increased by a fixed amount.

Abstract translation: 公开了用于选择至少一个信号路径的方法，并且可以包括确定多个信号路径中的每一个的功率电平特性。 可以修改多个信号路径中的每一个的所确定的功率电平特性。 可以选择多个信号路径中的至少一个用于接收信号。 该选择可以基于修改的功率电平特性中的至少一个。 该方法还可以包括循环通过至少一个信号路径。 可以偏置多个信号路径中的每一个的功率电平特性。 可以将多个信号路径中的每一个的功率电平特性增加固定量。

公开(公告)号：US08391387B2

公开(公告)日：2013-03-05

申请号：US13372703

申请日：2012-02-14

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

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

IPC: H04L27/28

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：US07643578B2

公开(公告)日：2010-01-05

申请号：US11364637

申请日：2006-02-28

Applicant: Min Chuin Hoo ,  Rajendra Tushar Moorti

Inventor： Min Chuin Hoo ,  Rajendra Tushar Moorti

IPC: H03D3/00

CPC classification number: H04L27/2657 ,  H04L1/0618 ,  H04L27/2679 ,  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：US07433432B2

公开(公告)日：2008-10-07

申请号：US11027102

申请日：2004-12-31

Applicant: Min Chuin Hoo

Inventor： Min Chuin Hoo

IPC: H04L1/02

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：US06829307B1

公开(公告)日：2004-12-07

申请号：US09513716

申请日：2000-02-24

Applicant: Louise Min Chuin Hoo ,  Atul Arvind Salvekar ,  Carlos Aldana ,  John M. Cioffi ,  Peter Chow ,  James Carlo

Inventor： Louise Min Chuin Hoo ,  Atul Arvind Salvekar ,  Carlos Aldana ,  John M. Cioffi ,  Peter Chow ,  James Carlo

IPC: H04K110

CPC classification number: H04L5/006 ,  H04L1/0025 ,  H04L1/004 ,  H04L5/0007 ,  H04L5/0042 ,  H04L5/0046 ,  H04L5/0053 ,  H04L5/0085 ,  H04L5/0096

Abstract: Methods and devices for adaptively changing a parameter (such as sub-carrier bit allocation and/or gain) in a multi-carrier communication signal are described. In a method aspect, a unit that determines a need for a change sends an express change request to a second unit. The change request identifies one or more specific sub-carrier carrier to be altered and a desired value for the parameter to be changed for each identified sub-carrier. The requesting unit then monitors the communication signal it receives to determine whether the requested change has been implemented. The determination of whether the requested change has been implemented is based at least in part upon an analysis of a portion of the received communication signal that was intended to be changed. In another aspect of the invention, the change request command includes a header, a control field, at least one sub-carrier identifier, at least one desired parameter value indicator, and an error field. The header identifies the command as a change request command. The control field includes a tone count that indicates the number of tones to be altered. Each sub-carrier identifier identifies a specific sub-carrier to be altered and each desired parameter value indicator identifies a desired parameter value for its associated sub-carrier. The error field permits the unit receiving the change request to detect whether there is an error in its interpretation of the change request command.

Abstract translation: 描述了用于在多载波通信信号中自适应地改变参数（例如子载波比特分配和/或增益）的方法和装置。 在方法方面，确定需要改变的单元向第二单元发送快速更改请求。 改变请求识别要改变的一个或多个特定副载波载波和要为每个识别的子载波改变的参数的期望值。 然后，请求单元监视其接收到的通信信号，以确定所请求的改变是否已被实现。 至少部分地基于对旨在改变的所接收的通信信号的一部分的分析来确定所请求的改变是否被实现。 在本发明的另一方面，改变请求命令包括报头，控制字段，至少一个子载波标识符，至少一个期望参数值指示符和错误字段。 标题将该命令标识为更改请求命令。 控制字段包括指示要改变的音调数量的音调计数。 每个子载波标识符识别要改变的特定子载波，并且每个期望的参数值指示符识别其相关联的子载波的期望参数值。 错误字段允许接收改变请求的单元检测其对改变请求命令的解释是否存在错误。

公开(公告)号：US20130142280A1

公开(公告)日：2013-06-06

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: H04B7/06

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：US20120140613A1

公开(公告)日：2012-06-07

申请号：US13372703

申请日：2012-02-14

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

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

IPC: H04J11/00 ,  H04B1/69 ,  H04W84/02

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：US07764741B2

公开(公告)日：2010-07-27

申请号：US11695795

申请日：2007-04-03

Applicant: Rajendra Tushar Moorti ,  Min Chuin Hoo ,  Jason A. Trachewsky

Inventor： Rajendra Tushar Moorti ,  Min Chuin Hoo ,  Jason A. Trachewsky

IPC: H04L27/06

CPC classification number: H04L25/067 ,  H04L27/0012

Abstract: A radio frequency receiver for discriminating a modulation type to decode a signal field of an encoded signal in a wireless communication system. The radio frequency (RF) receiver receives an encoded signal having a preamble training sequence associated with a frame, the preamble training sequence including the signal field. The radio frequency receive generates at least a first log-likelihood ratio (LLR) stream and a second LLR stream for each of a plurality of sub-symbols for a predetermined portion of the received encoded signal based upon an m-bit wide modulation reference, wherein m represents the bit width of the modulation reference. The first LLR stream and the second LLR stream each include a plurality of LLR values. The plurality of LLR values of the first LLR stream are summed to produce a first cumulative LLR, and the plurality of LLR values of the second LLR stream are summed to produce a second cumulative LLR. The first cumulative LLR is discriminated with the second cumulative LLR to produce a discriminated modulation type output. The receiver decodes the signal field based on the discriminated modulation type output.

Abstract translation: 一种射频接收机，用于鉴别在无线通信系统中对编码信号的信号场进行解码的调制类型。 射频（RF）接收机接收具有与帧相关联的前同步码训练序列的编码信号，前导码训练序列包括信号字段。 基于m位宽调制参考，无线电频率接收对于接收的编码信号的预定部分的多个子符号中的每一个产生至少第一对数似然比（LLR）流和第二LLR流， 其中m表示调制参考的位宽。 第一LLR流和第二LLR流各自包括多个LLR值。 将第一LLR流的多个LLR值相加以产生第一累积LLR，并且将第二LLR流的多个LLR值相加以产生第二累积LLR。 第一累积LLR用第二累积LLR进行鉴别，以产生鉴别调制类型的输出。 接收机根据鉴别出的调制类型输出对信号场进行解码。

公开(公告)号：US20090270060A1

公开(公告)日：2009-10-29

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: H04B1/06

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：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。