专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08472543B2 Method and system for predicting channel quality index (CQI) values for maximum likelihood (ML) detection in a 2×2 multiple input multiple output (MIMO) wireless system 失效
标题翻译：用于在2×2多输入多输出（MIMO）无线系统中预测用于最大似然（ML）检测的信道质量指数（CQI）值的方法和系统
公开(公告)号：US08472543B2
公开(公告)日：2013-06-25
申请号：US12430286
申请日：2009-04-27
申请人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
发明人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
IPC分类号： H04L23/02
CPC分类号： H04L25/0204 , H04B7/0854 , H04B17/24 , H04B17/336 , H04B17/373 , H04L1/0009 , H04L1/0016 , H04L1/0025 , H04L1/0026 , H04L1/20 , H04L25/0228 , H04L25/0248 , H04L25/03343 , H04L25/067 , H04L27/2601 , H04L2025/03426 , H04L2025/03802
摘要： Aspects of a method and system for predicting CQI values for ML detection in a 2×2 MIMO system are presented. In one aspect of the system, a CQI value for a MIMO communication system may be computed based on a computed channel realization by reverse mapping the computed channel realization to a corresponding CQI value. Based on the computed CQI value, a coding rate may be selected. The coding rate may be selected from a lookup table, wherein the computed CQI value is utilized as an index to the lookup table. The reverse mapping may utilize a function, which is computed using radial basis function networks. In another aspect of the system, a joint mutual information value may be computed for the MIMO communication system. The joint mutual information value may be computed based on a Shannon mutual information value and a matched filter mutual information value.
摘要翻译：提出了一种用于在2×2 MIMO系统中预测ML检测的CQI值的方法和系统的方面。在该系统的一个方面，可以基于所计算的信道实现，通过将计算的信道实现反向映射到相应的CQI值来计算MIMO通信系统的CQI值。基于所计算的CQI值，可以选择编码率。编码率可以从查找表中选择，其中所计算的CQI值被用作查找表的索引。反向映射可以利用使用径向基函数网络来计算的函数。在系统的另一方面，可以为MIMO通信系统计算联合互信息值。可以基于香农互信息值和匹配滤波器互信息值来计算联合互信息值。

2. 发明授权

US08442142B2 Method and system for beamforming signal transmission under a per-antenna power constraint 有权
标题翻译：在每个天线功率约束下波束成形信号传输的方法和系统
公开(公告)号：US08442142B2
公开(公告)日：2013-05-14
申请号：US12761567
申请日：2010-04-16
申请人： Eric Ojard , Sirikiat Ariyavisitakul , Joonsuk Kim
发明人： Eric Ojard , Sirikiat Ariyavisitakul , Joonsuk Kim
IPC分类号： H01Q3/00 , G01S1/00
CPC分类号： H01Q25/00
摘要： A method and system for beamforming signal transmission under a per-antenna power constraint is presented. In one aspect, a multiple input multiple output (MIMO) transmitting station may compute a per-antenna power gain factor for each of a plurality of transmit chain signals. The transmit chain signals may be concurrently transmitted by a plurality of transmitting antennas at the MIMO transmitting station. The plurality of transmit chain signals may correspond to beamforming signals, which are generated by performing spatial mapping on a plurality of space-time signals. The plurality of power gain factors may be computed based on a per-antenna power constraint. Alternatively, the plurality of power gain factors may be computed based on joint per-antenna power and total-power constraints. Each of the transmit chain signals may be amplified or attenuated based on the corresponding antenna gain factor. The amplified or attenuated signal is then transmitted by the corresponding transmitting antenna.
摘要翻译：提出了一种在每个天线功率约束下波束成形信号传输的方法和系统。在一个方面，多输入多输出（MIMO）发射站可以为多个发射链信号中的每一个计算每天线功率增益因子。发射链信号可以在MIMO发射台处由多个发射天线同时发射。多个发射链信号可以对应于通过在多个时空信号上执行空间映射而生成的波束形成信号。可以基于每天线功率约束来计算多个功率增益因子。或者，可以基于联合每天线功率和总功率约束来计算多个功率增益因子。每个发射链信号可以基于相应的天线增益因子被放大或衰减。放大或衰减的信号然后由相应的发射天线发射。

3. 发明申请

US20110205118A1 METHOD AND SYSTEM FOR BEAMFORMING SIGNAL TRANSMISSION UNDER A PER-ANTENNA POWER CONSTRAINT 有权
标题翻译：用于在天线功率约束下进行信号传输的方法和系统
公开(公告)号：US20110205118A1
公开(公告)日：2011-08-25
申请号：US12761567
申请日：2010-04-16
申请人： Eric Ojard , Sirikiat Lek Ariyavisitakul , Joonsuk Kim
发明人： Eric Ojard , Sirikiat Lek Ariyavisitakul , Joonsuk Kim
IPC分类号： H01Q3/00 , G01S1/00
CPC分类号： H01Q25/00
摘要： A method and system for beamforming signal transmission under a per-antenna power constraint is presented. In one aspect, a multiple input multiple output (MIMO) transmitting station may compute a per-antenna power gain factor for each of a plurality of transmit chain signals. The transmit chain signals may be concurrently transmitted by a plurality of transmitting antennas at the MIMO transmitting station. The plurality of transmit chain signals may correspond to beamforming signals, which are generated by performing spatial mapping on a plurality of space-time signals. The plurality of power gain factors may be computed based on a per-antenna power constraint. Alternatively, the plurality of power gain factors may be computed based on joint per-antenna power and total-power constraints. Each of the transmit chain signals may be amplified or attenuated based on the corresponding antenna gain factor. The amplified or attenuated signal is then transmitted by the corresponding transmitting antenna.
摘要翻译：提出了一种在每个天线功率约束下波束成形信号传输的方法和系统。在一个方面，多输入多输出（MIMO）发射站可以为多个发射链信号中的每一个计算每天线功率增益因子。发射链信号可以在MIMO发射台处由多个发射天线同时发射。多个发射链信号可以对应于通过在多个时空信号上执行空间映射而生成的波束形成信号。可以基于每天线功率约束来计算多个功率增益因子。或者，可以基于联合每天线功率和总功率约束来计算多个功率增益因子。每个发射链信号可以基于相应的天线增益因子被放大或衰减。放大或衰减的信号然后由相应的发射天线发射。

4. 发明申请

US20110164699A1 METHOD AND SYSTEM FOR AN ITERATIVE MULTIPLE USER MULTIPLE INPUT MULTIPLE OUTPUT (MU-MIMO) COMMUNICATION SYSTEM 有权
标题翻译：多输入多输入多输入（MU-MIMO）通信系统的方法与系统
公开(公告)号：US20110164699A1
公开(公告)日：2011-07-07
申请号：US12834455
申请日：2010-07-12
申请人： Eric Ojard
发明人： Eric Ojard
IPC分类号： H04B7/02 , H04L27/00
CPC分类号： H04B7/0452 , H04B7/0617 , H04B7/086
摘要： A method and system for an iterative multiple user multiple input multiple output (MU-MIMO) communication system are presented. In one aspect, a current iteration beamforming matrix may be generated based on a current iteration matched filter matrix for each of a plurality of user devices. A subsequent iteration matched filter matrix may be generated based on the current iteration beamforming matrix for each of the plurality of user devices. A subsequent iteration beamforming matrix may be generated based on the subsequent iteration matched filter matrix for each of the plurality of user devices. A succeeding iteration beamforming matrix may be generated based on an iteration count value and/or based on one or more difference values. The one or more difference values may be computed based on the plurality of subsequent iteration beamforming matrices and the plurality of current iteration beamforming matrices generated for the plurality of user devices.
摘要翻译：提出了一种迭代多用户多输入多输出（MU-MIMO）通信系统的方法和系统。在一个方面，可以基于用于多个用户设备中的每一个的当前迭代匹配滤波器矩阵来生成当前迭代波束形成矩阵。可以基于用于多个用户设备中的每一个的当前迭代波束形成矩阵来生成后续迭代匹配滤波器矩阵。可以基于用于多个用户设备中的每一个的后续迭代匹配滤波器矩阵来生成后续迭代波束形成矩阵。可以基于迭代计数值和/或基于一个或多个差值来生成后续迭代波束形成矩阵。可以基于为多个用户设备生成的多个后续迭代波束形成矩阵和多个当前迭代波束形成矩阵来计算一个或多个差值。

5. 发明申请

US20110135044A1 System and Method for Canceling Interference in a Communication System 有权
标题翻译：消除通信系统干扰的系统和方法
公开(公告)号：US20110135044A1
公开(公告)日：2011-06-09
申请号：US13026608
申请日：2011-02-14
申请人： Thomas J. Kolze , Bruce J. Currivan , Jonathan S. Min , Eric Ojard , James Chi Thi , Daniel Howard
发明人： Thomas J. Kolze , Bruce J. Currivan , Jonathan S. Min , Eric Ojard , James Chi Thi , Daniel Howard
IPC分类号： H04L1/00
CPC分类号： H04B1/1036 , H04B1/1027 , H04B1/123 , H04L1/0001 , H04L25/03006
摘要： A filter settings generation operation includes sampling a communication channel to produce a sampled signal. The sampled signal is spectrally characterized across a frequency band of interest to produce a spectral characterization of the sampled signal. This spectral characterization may not include a signal of interest. The spectral characterization is then modified to produce a modified spectral characterization. Filter settings are then generated based upon the modified spectral characterization. Finally, the communication channel is filtered using the filter settings when the signal of interest is present on the communication channel. In modifying the spectral characterization, pluralities of spectral characteristics of the spectral characterization are independently modified to produce the modified spectral characterization. Modifications to the spectral characterization may be performed in the frequency domain and/or the time domain. One particular spectral modification that is performed is raising of the noise floor of the spectral characterization to meet a budgeted signal-to-noise ratio. Other spectral modifications include modifying spectral components corresponding to an expected interfering signal. In modifying these spectral characterizations, spectral components corresponding to a plurality of expected interfering signals may be modified.
摘要翻译：滤波器设置生成操作包括对通信信道进行采样以产生采样信号。采样信号在感兴趣的频带上进行频谱表征，以产生采样信号的频谱表征。该光谱特性可能不包括感兴趣的信号。然后修改光谱表征以产生修改的光谱表征。然后基于修改的光谱表征生成滤波器设置。最后，当感兴趣的信号存在于通信信道上时，使用滤波器设置对通信信道进行滤波。在修改光谱表征时，光谱特性的多个光谱特征被独立地修改以产生修改的光谱表征。频谱表征的修改可以在频域和/或时域中执行。执行的一个特定频谱修改是提高频谱表征的本底噪声以满足预算的信噪比。其他频谱修改包括修改对应于预期干扰信号的频谱分量。在修改这些频谱表征时，可以修改对应于多个预期干扰信号的频谱分量。

6. 发明申请

US20090268834A1 METHOD AND SYSTEM FOR PREDICTING CHANNEL QUALITY INDEX (CQI) VALUES FOR MAXIMUM LIKELIHOOD (ML) DETECTION IN A KXK MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) WIRELESS SYSTEM 审中-公开
标题翻译：用于在KXK多输入多输出（MIMO）无线系统中用于最大似然（ML）检测的信道质量指数（CQI）值的预测方法和系统
公开(公告)号：US20090268834A1
公开(公告)日：2009-10-29
申请号：US12430294
申请日：2009-04-27
申请人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
发明人： Sirikiat Ariyavisitakul , Eric Ojard , Jun Zheng
IPC分类号： H04L5/12 , H04L27/06
CPC分类号： H04L25/0204 , H04B7/0854 , H04B17/373 , H04L1/0009 , H04L1/0025 , H04L1/0618 , H04L1/20 , H04L25/0248 , H04L25/03343 , H04L25/067 , H04L2025/03426 , H04L2025/03802
摘要： Aspects of a method and system for predicting CQI values for ML detection in a K×K MIMO system are presented. In one aspect of the system, a CQI value for a K×K MIMO communication system may be computed by decomposing the K×K MIMO system into a series of 2×2 MIMO systems. For each 2×2 MIMO system a CQI value may be computed by reverse mapping a PER computed for the 2×2 MIMO system and an SNR value for a SISO communication system. By summing CQI values among the series of 2×2 MIMO systems a CQI value for the K×K MIMO system may be computed. Based on the computed CQI value for the K×K MIMO system, a coding rate may be selected. The selected coding rate may be selected to maximize a computed information throughput rate at a MIMO receiver that utilizes ML detection.
摘要翻译：提出了一种用于预测KxK MIMO系统中ML检测的CQI值的方法和系统的方面。在该系统的一个方面，可以通过将KxK MIMO系统分解成一系列2x2MIMO系统来计算用于KxK MIMO通信系统的CQI值。对于每个2x2 MIMO系统，可以通过对针对2x2 MIMO系统计算的PER和SISO通信系统的SNR值进行反映射来计算CQI值。通过对2×2 MIMO系统的CQI值进行求和，可以计算K×K MIMO系统的CQI值。基于所计算的KxK MIMO系统的CQI值，可以选择编码率。可以选择所选择的编码率以使利用ML检测的MIMO接收机处的计算的信息吞吐率最大化。

7. 发明授权

US07242732B2 Carrier based backwards compatible data networking transmitter, receiver, and signal format 失效
标题翻译：基于载波的向后兼容数据网络发射机，接收机和信号格式
公开(公告)号：US07242732B2
公开(公告)日：2007-07-10
申请号：US10077653
申请日：2002-02-15
申请人： Eric Ojard , Jason Trachewsky
发明人： Eric Ojard , Jason Trachewsky
IPC分类号： H04L7/00 , H04L12/28
CPC分类号： H04L12/2803 , H04B1/0053 , H04B1/0067 , H04L1/04 , H04L1/08 , H04L5/06 , H04L12/2838 , H04L27/00 , H04L27/28 , H04L27/32
摘要： New version packet data devices support a backwards-compatible signal format. New version devices operate within a first frequency band while old version devices operate within a second frequency band. The first frequency band differs from but overlaps with the second frequency band. The new version devices may operate on a first carrier frequency (within the first frequency band) while old version devices may operate at a second carrier frequency (within the second frequency band). The new version devices and/or the old version devices may also support carrier-less modulations. Preamble, header, and trailer portions of a new version signal include a plurality of spectral copies of a baseband modulated signal. One or more of these spectral copies of the baseband modulated signal is/are indistinguishable from corresponding components of an old version signal. The payload of the new version signal may be formed in the same manner or may be formed in have a wider bandwidth, higher data rate format.
摘要翻译：新版本的数据包数据设备支持向后兼容的信号格式。新版设备在第一频段内工作，而旧版设备在第二频段内工作。第一频带与第二频带不同但与第二频带重叠。新版本设备可以在第一载波频率（第一频带内）操作，而旧版本设备可以在第二载波频率（在第二频带内）操作。新版本的设备和/或旧版本的设备也可以支持无载波调制。新版本信号的前导码，报头和尾部包括基带调制信号的多个频谱副本。基带调制信号的这些光谱副本中的一个或多个与旧版本信号的相应组件无法区分。新版本信号的有效载荷可以以相同的方式形成，或者可以形成为具有更宽带宽，更高数据速率格式。

8. 发明授权

US07218694B2 System and method for canceling interference in a communication system 有权
公开(公告)号：US07218694B2
公开(公告)日：2007-05-15
申请号：US10940136
申请日：2004-09-14
申请人： Thomas J. Kolze , Bruce J. Currivan , Jonathan S. Min , Eric Ojard , James Chi Thi , Daniel Howard
发明人： Thomas J. Kolze , Bruce J. Currivan , Jonathan S. Min , Eric Ojard , James Chi Thi , Daniel Howard
IPC分类号： H03D1/04
CPC分类号： H04B1/1036 , H04B1/1027 , H04B1/123 , H04L1/0001 , H04L25/03006
摘要： A filter settings generation operation includes sampling a communication channel to produce a sampled signal. The sampled signal is spectrally characterized across a frequency band of interest to produce a spectral characterization of the sampled signal. This spectral characterization may not include a signal of interest. The spectral characterization is then modified to produce a modified spectral characterization. Filter settings are then generated based upon the modified spectral characterization. Finally, the communication channel is filtered using the filter settings when the signal of interest is present on the communication channel. In modifying the spectral characterization, pluralities of spectral characteristics of the spectral characterization are independently modified to produce the modified spectral characterization. Modifications to the spectral characterization may be performed in the frequency domain and/or the time domain. One particular spectral modification that is performed is raising of the noise floor of the spectral characterization to meet a budgeted signal-to-noise ratio. Other spectral modifications include modifying spectral components corresponding to an expected interfering signal. In modifying these spectral characterizations, spectral components corresponding to a plurality of expected interfering signals may be modified.

9. 发明授权

US07035285B2 Transceiver method and signal therefor embodied in a carrier wave for a frame-based communications network 有权
公开(公告)号：US07035285B2
公开(公告)日：2006-04-25
申请号：US09826239
申请日：2001-04-04
申请人： John T. Holloway , Edward H. Frank , Eric Ojard , Jason Alexander Trachewsky , Tracy D. Mallory , Henry S. Ptasinski , Raymond Hayes , Kevin H. Peterson , Larry C. Yamano , Alan Corry , Jay Pattin
发明人： John T. Holloway , Edward H. Frank , Eric Ojard , Jason Alexander Trachewsky , Tracy D. Mallory , Henry S. Ptasinski , Raymond Hayes , Kevin H. Peterson , Larry C. Yamano , Alan Corry , Jay Pattin
IPC分类号： H04J3/26
CPC分类号： H04L1/0005 , H04L1/0003 , H04L1/0006 , H04L1/0009 , H04L1/0025 , H04L1/0061 , H04L1/0072 , H04L1/08 , H04L1/18 , H04L1/1809 , H04L1/1848 , H04L1/1877 , H04L1/1883 , H04L1/1887 , H04L1/20 , H04L12/40032 , H04L12/4013 , H04L12/40136 , H04L12/40156 , H04L12/40163 , H04L12/403 , H04L12/4035 , H04L12/407 , H04L12/413 , H04L12/417 , H04L2001/0093 , H04L2001/125 , H04M11/00 , H04M11/06 , Y02D50/10
摘要： A method and signal therfor embodied in a carrier wave for sending information from transmit stations to receive stations over a transmission medium of a frame-based communications network. The information is sent in transmit frames having a frame format comprising a fixed rate header, followed by a variable rate payload, followed by a fixed rate trailer. The fixed rate header includes a preamble. The preamble has a repetition of four symbol sequences for facilitating power estimation, gain control, baud frequency offset estimation, equalizer training, carrier sensing and collision detection. The preamble also includes a frame control field. The frame control field has scrambler control information for frame scrambling initialization, a priority field to determine the absolute priority a transmit frame will have when determining access to the transmission medium, a payload encoding field which determines constellation encoding of payload bits in the variable rate payload, and a header check sequence for providing a cyclic redundancy check. The variable rate payload is transmitted pursuant to dynamic adjustable frame encoding parameters for improving transmission performance for a transmit frame being transmitted from a transmitting station to a receiving station. The header also includes a destination address field, a source address field and an ethertype field.

10. 发明申请

US20050207510A1 Frequency diverse single carrier modulation for robust communication over in-premises wiring 有权
公开(公告)号：US20050207510A1
公开(公告)日：2005-09-22
申请号：US11122149
申请日：2005-05-04
申请人： Eric Ojard
发明人： Eric Ojard
IPC分类号： H04L1/04 , H04L5/06 , H04L25/03 , H04L27/04 , H04L27/10 , H04L27/18 , H04L27/26 , H04L27/34 , H04L27/36
CPC分类号： H04L5/06 , H04L1/04 , H04L25/03044 , H04L25/03063 , H04L27/10 , H04L27/18 , H04L27/2601 , H04L27/34 , H04L27/362
摘要： The present invention provides a frequency-diverse single-carrier modulation scheme that extends the usable SNR range of severely distorted channels. This scheme is advantageous for applications in which when the SNR is low and the transmitted spectrum contains unusable regions (e.g., spectral nulls due to radio-frequency interference ingress or egress). In one embodiment, the symbol baud rate is selected in order that unusable portions of the frequency response of the transmission channel are mapped onto usable portions of the frequency response of the transmission channel.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式