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31. 发明授权

US07076263B2 Power control for partial channel-state information (CSI) multiple-input, multiple-output (MIMO) systems 有权
公开(公告)号：US07076263B2
公开(公告)日：2006-07-11
申请号：US10079970
申请日：2002-02-19
申请人： Irina Medvedev , Jay R. Walton , John W. Ketchum
发明人： Irina Medvedev , Jay R. Walton , John W. Ketchum
IPC分类号： H04B7/00
CPC分类号： H04B7/0417 , H04B7/0619 , H04L1/0001 , H04L1/06 , H04W52/42
摘要： Techniques for controlling the transmit power for a number of data streams in a wireless multi-channel (e.g., MIMO) communication system. In one method, a number of received symbol streams are initially processed in accordance with a particular (e.g., CCMI, CCMI-SC, MMSE, or MMSE-SC) receiver processing technique to provide a number of detected data streams. The post-detection SNRs of the detected data streams are estimated, and each SNR that exceeds a setpoint is identified. This setpoint may correspond to (1) the SNR needed to achieve the maximum allowed spectral efficiency or (2) the target SNR needed to achieve a specified spectral efficiency. A new (or adjusted) transmit power for each detected data stream associated with a post-detection SNR that exceeds the setpoint is determined and used for the data stream. Different power control schemes are provided for different classes of receiver processing techniques with different characteristics.

32. 发明授权

US07020110B2 Resource allocation for MIMO-OFDM communication systems 有权
公开(公告)号：US07020110B2
公开(公告)日：2006-03-28
申请号：US10042529
申请日：2002-01-08
申请人： Jay Rod Walton , John W. Ketchum , Mark Wallace , Irina Medvedev
发明人： Jay Rod Walton , John W. Ketchum , Mark Wallace , Irina Medvedev
IPC分类号： H04Q7/00
CPC分类号： H04L5/0023 , H04L1/06 , H04L5/0042 , H04L5/0044 , H04L5/0058 , H04L5/006
摘要： Techniques to schedule terminals for data transmission on the downlink and/or uplink in a MIMO-OFDM system based on the spatial and/or frequency “signatures” of the terminals. A scheduler forms one or more sets of terminals for possible (downlink or uplink) data transmission for each of a number of frequency bands. One or more sub-hypotheses may further be formed for each hypothesis, with each sub-hypothesis corresponding to (1) specific assignments of transmit antennas to the terminal(s) in the hypothesis (for the downlink) or (2) a specific order for processing the uplink data transmissions from the terminal(s) (for the uplink). The performance of each sub-hypothesis is then evaluated (e.g., based on one or more performance metrics). One sub-hypothesis is then selected for each frequency band based on the evaluated performance, and the one or more terminals in each selected sub-hypothesis are then scheduled for data transmission on the corresponding frequency band.

33. 发明授权

US08462653B2 Methods and system for transmission mode selection in a multi channel communication system 失效
标题翻译：多通道通信系统中传输模式选择的方法与系统
公开(公告)号：US08462653B2
公开(公告)日：2013-06-11
申请号：US12778911
申请日：2010-05-12
申请人： Irina Medvedev , John W. Ketchum , J. Rodney Walton
发明人： Irina Medvedev , John W. Ketchum , J. Rodney Walton
IPC分类号： H04L12/26
CPC分类号： H04W24/02 , H04L1/0002 , H04L1/0016 , H04L1/0019 , H04L1/0025 , H04L1/06 , H04L1/20
摘要： Techniques to select a suitable transmission mode for a data transmission in a multi channel communication system with multiple spatial channels having varying SNRs are presented in this disclosure. For certain embodiments, a closed-loop technique may be applied, in which back-off factors used to calculate an effective SNR value fed back to a transmitter are adjusted. An open-loop rate control scheme is also presented in which a transmitter may select a data rate and number of streams based on whether transmitted packets are received in error at a receiver.
摘要翻译：在本公开中提出了在具有变化的SNR的多个空间信道的多通道通信系统中选择用于数据传输的合适传输模式的技术。对于某些实施例，可以应用闭环技术，其中调整用于计算反馈到发射机的有效SNR值的回退因子。还提出了一种开环速率控制方案，其中发射机可以基于在接收机处是否发送的分组被错误地接收来选择数据速率和数量的数据流。

34. 发明授权

US08619620B2 Methods and systems for transmission mode selection in a multi channel communication system 失效
标题翻译：多通道通信系统中传输模式选择的方法和系统
公开(公告)号：US08619620B2
公开(公告)日：2013-12-31
申请号：US12211811
申请日：2008-09-16
申请人： Irina Medvedev , John W. Ketchum , J. Rodney Walton
发明人： Irina Medvedev , John W. Ketchum , J. Rodney Walton
IPC分类号： G06F11/00 , H04B7/005
CPC分类号： H04W24/02 , H04L1/0002 , H04L1/0016 , H04L1/0019 , H04L1/0025 , H04L1/06 , H04L1/20
摘要： Techniques to select a suitable transmission mode for a data transmission in a multi channel communication system with multiple spatial channels having varying SNRs are presented in this disclosure. For certain embodiments, a closed-loop technique may be applied, in which back-off factors used to calculate an effective SNR value fed back to a transmitter are adjusted. An open-loop rate control scheme is also presented in which a transmitter may select a data rate and number of streams based on whether transmitted packets are received in error at a receiver.
摘要翻译：在本公开中提出了在具有变化的SNR的多个空间信道的多通道通信系统中选择用于数据传输的合适传输模式的技术。对于某些实施例，可以应用闭环技术，其中调整用于计算反馈到发射机的有效SNR值的回退因子。还提出了一种开环速率控制方案，其中发射机可以基于在接收机处是否发送的分组被错误地接收来选择数据速率和数量的数据流。

35. 发明申请

US20100296407A1 METHODS AND SYSTEMS FOR TRANSMISSION MODE SELECTION IN A MULTI CHANNEL COMMUNICATION SYSTEM 失效
标题翻译：多通道通信系统中传输模式选择的方法与系统
公开(公告)号：US20100296407A1
公开(公告)日：2010-11-25
申请号：US12778911
申请日：2010-05-12
申请人： Irina Medvedev , John W. Ketchum , J. Rodney Walton
发明人： Irina Medvedev , John W. Ketchum , J. Rodney Walton
IPC分类号： H04L12/26
CPC分类号： H04W24/02 , H04L1/0002 , H04L1/0016 , H04L1/0019 , H04L1/0025 , H04L1/06 , H04L1/20
摘要： Techniques to select a suitable transmission mode for a data transmission in a multi channel communication system with multiple spatial channels having varying SNRs are presented in this disclosure. For certain embodiments, a closed-loop technique may be applied, in which back-off factors used to calculate an effective SNR value fed back to a transmitter are adjusted. An open-loop rate control scheme is also presented in which a transmitter may select a data rate and number of streams based on whether transmitted packets are received in error at a receiver.
摘要翻译：在本公开中提出了在具有变化的SNR的多个空间信道的多通道通信系统中选择用于数据传输的合适传输模式的技术。对于某些实施例，可以应用闭环技术，其中调整用于计算反馈到发射机的有效SNR值的回退因子。还提出了一种开环速率控制方案，其中发射机可以基于在接收机处是否发送的分组被错误地接收来选择数据速率和数量的数据流。

36. 发明授权

US07221956B2 Power control for partial channel-state information (CSI) multiple-input, multiple-output (MIMO) systems 有权
标题翻译：部分信道状态信息（CSI）多输入多输出（MIMO）系统的功率控制
公开(公告)号：US07221956B2
公开(公告)日：2007-05-22
申请号：US11049319
申请日：2005-02-01
申请人： Irina Medvedev , Jay R. Walton , John W. Ketchum
发明人： Irina Medvedev , Jay R. Walton , John W. Ketchum
IPC分类号： H04B7/00
CPC分类号： H04B7/0417 , H04B7/0619 , H04L1/0001 , H04L1/06 , H04W52/42
摘要： Techniques for controlling the transmit power for a number of data streams in a wireless multi-channel (e.g., MIMO) communication system. In one method, a number of received symbol streams are initially processed in accordance with a particular (e.g., CCMI, CCMI-SC, MMSE, or MMSE-SC) receiver processing technique to provide a number of detected data streams. The post-detection SNRs of the detected data streams are estimated, and each SNR that exceeds a setpoint is identified. This setpoint may correspond to (1) the SNR needed to achieve the maximum allowed spectral efficiency or (2) the target SNR needed to achieve a specified spectral efficiency. A new (or adjusted) transmit power for each detected data stream associated with a post-detection SNR that exceeds the setpoint is determined and used for the data stream. Different power control schemes are provided for different classes of receiver processing techniques with different characteristics.
摘要翻译：用于在无线多信道（例如，MIMO）通信系统中控制多个数据流的发射功率的技术。在一种方法中，根据特定（例如，CCMI，CCMI-SC，MMSE或MMSE-SC）接收机处理技术最初处理多个接收到的符号流，以提供多个检测到的数据流。估计检测到的数据流的检测后SNR，并且识别超过设定点的每个SNR。该设定点可以对应于（1）实现最大允许频谱效率所需的SNR或（2）实现特定频谱效率所需的目标SNR。确定与用于超过设定点的检测后SNR相关联的每个检测到的数据流的新（或调整的）发射功率并将其用于数据流。为不同类型的具有不同特性的接收机处理技术提供不同的功率控制方案。

37. 发明授权

US07020482B2 Reallocation of excess power for full channel-state information (CSI) multiple-input, multiple-output (MIMO) systems 有权
公开(公告)号：US07020482B2
公开(公告)日：2006-03-28
申请号：US10056275
申请日：2002-01-23
申请人： Irina Medvedev , Jay Rod Walton , John W. Ketchum
发明人： Irina Medvedev , Jay Rod Walton , John W. Ketchum
IPC分类号： H04B7/00
CPC分类号： H04W52/346 , H04B7/0443 , H04W24/00 , H04W52/241 , H04W52/267 , H04W52/50 , H04W72/00
摘要： Techniques to allocate the total transmit power to the transmission channels in a multi-channel communication system such that higher overall system spectral efficiency and/or other benefits may be achieved. The total transmit power may be initially allocated to the transmission channels based on a particular power allocation scheme (e.g., the water-filling scheme). The initial allocation may result in more power being allocated to some transmission channels than needed to achieve the required SNR (e.g., the SNR needed to achieve the maximum allowed data rate), which would then result in these transmission channels being operated in the saturation region. In such situations, the techniques reallocate the excess transmit power of transmission channels operated in the saturation region to other transmission channels operated below the saturation region. In this way, higher data rate may be achieved for the “poorer” transmission channels without sacrificing the performance of the “better” transmission channels.

38. 发明授权

US08194770B2 Coded MIMO systems with selective channel inversion applied per eigenmode 有权
标题翻译：具有针对本征模式的选择性信道反演的编码MIMO系统
公开(公告)号：US08194770B2
公开(公告)日：2012-06-05
申请号：US10229209
申请日：2002-08-27
申请人： Irina Medvedev , Jay Rod Walton , John W. Ketchum
发明人： Irina Medvedev , Jay Rod Walton , John W. Ketchum
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04W52/346 , H04B7/0413 , H04B7/0439 , H04L1/0003 , H04L1/0009 , H04L1/0041 , H04L1/0068 , H04L1/0071 , H04W52/42
摘要： Techniques to perform selective channel inversion per eigenmode in a MIMO system to achieve high spectral efficiency while reducing complexity at both the transmitter and receiver are presented. The available transmission channels are arranged into a number of groups, where each group may include all transmission channels (or frequency bins) for a respective eigenmode of a MIMO channel. The total transmit power is allocated to the groups using a particular group power allocation scheme. Selective channel inversion is then performed independently for each group selected for use for data transmission. For each such group, one or more transmission channels in the group are selected for use, and a scaling factor is determined for each selected channel such that all selected channels for the group achieve similar received signal quality (e.g., received SNR).
摘要翻译：提出了在MIMO系统中对每个本征模执行选择性信道反演以实现高频谱效率同时降低发射机和接收机两者的复杂度的技术。可用的传输信道被布置成多个组，其中每个组可以包括用于MIMO信道的相应本征模式的所有传输信道（或频率仓）。使用特定组功率分配方案将总发射功率分配给组。然后为选择用于数据传输的每个组独立地执行选择性信道反转。对于每个这样的组，组中的一个或多个传输信道被选择用于使用，并且为每个所选择的信道确定缩放因子，使得该组的所有选择的信道实现相似的接收信号质量（例如，接收到的SNR）。

39. 发明授权

US08094625B2 Resource allocation for MIMO-OFDM communication systems 有权
标题翻译： MIMO-OFDM通信系统的资源分配
公开(公告)号：US08094625B2
公开(公告)日：2012-01-10
申请号：US11248890
申请日：2005-10-11
申请人： Jay Rod Walton , John W. Ketchum , Mark Wallace , Irina Medvedev
发明人： Jay Rod Walton , John W. Ketchum , Mark Wallace , Irina Medvedev
IPC分类号： H04Q7/00
CPC分类号： H04L5/0023 , H04L1/06 , H04L5/0042 , H04L5/0044 , H04L5/0058 , H04L5/006
摘要： Techniques to schedule terminals for data transmission on the downlink and/or uplink in a MIMO-OFDM system based on the spatial and/or frequency “signatures” of the terminals. A scheduler forms one or more sets of terminals for possible (downlink or uplink) data transmission for each of a number of frequency bands. One or more sub-hypotheses may further be formed for each hypothesis, with each sub-hypothesis corresponding to (1) specific assignments of transmit antennas to the terminal(s) in the hypothesis (for the downlink) or (2) a specific order for processing the uplink data transmissions from the terminal(s) (for the uplink). The performance of each sub-hypothesis is then evaluated (e.g., based on one or more performance metrics). One sub-hypothesis is then selected for each frequency band based on the evaluated performance, and the one or more terminals in each selected sub-hypothesis are then scheduled for data transmission on the corresponding frequency band.
摘要翻译：基于终端的空间和/或频率“签名”，在MIMO-OFDM系统的下行链路和/或上行链路上安排终端进行数据传输的技术。调度器形成用于多个频带中的每一个的可能（下行链路或上行链路）数据传输的一个或多个终端集合。每个假设可以进一步形成一个或多个子假设，每个子假设对应于（1）假设（对于下行链路）的发射天线到终端的特定分配，或者（2）特定顺序用于处理来自终端（用于上行链路）的上行链路数据传输。然后评估每个子假设的性能（例如，基于一个或多个性能度量）。然后根据评估的性能为每个频带选择一个子假设，然后调度每个选择的子假设中的一个或多个终端用于相应频带上的数据传输。

40. 发明授权

US08078211B2 Reallocation of excess power for full channel-state information (CSI) multiple-input, multiple-output (MIMO) systems 有权
标题翻译：用于全信道状态信息（CSI）多输入多输出（MIMO）系统的多余功率的重新分配
公开(公告)号：US08078211B2
公开(公告)日：2011-12-13
申请号：US11330733
申请日：2006-01-11
申请人： Irina Medvedev , Jay Rod Walton , John W. Ketchum
发明人： Irina Medvedev , Jay Rod Walton , John W. Ketchum
IPC分类号： H04B7/00
CPC分类号： H04W52/346 , H04B7/0443 , H04W24/00 , H04W52/241 , H04W52/267 , H04W52/50 , H04W72/00
摘要： Techniques to allocate the total transmit power to the transmission channels in a multi-channel communication system such that higher overall system spectral efficiency and/or other benefits may be achieved. The total transmit power may be initially allocated to the transmission channels based on a particular power allocation scheme (e.g., the water-filling scheme). The initial allocation may result in more power being allocated to some transmission channels than needed to achieve the required SNR (e.g., the SNR needed to achieve the maximum allowed data rate), which would then result in these transmission channels being operated in the saturation region. In such situations, the techniques reallocate the excess transmit power of transmission channels operated in the saturation region to other transmission channels operated below the saturation region. In this way, higher data rate may be achieved for the “poorer” transmission channels without sacrificing the performance of the “better” transmission channels.
摘要翻译：在多信道通信系统中将总传输功率分配给传输信道的技术，使得可以实现更高的总体系统频谱效率和/或其他益处。可以基于特定的功率分配方案（例如，灌水方案）将总发射功率最初分配给传输信道。初始分配可以导致比实现所需SNR（例如，实现最大允许数据速率所需的SNR）所需的更多功率被分配给一些传输信道，这将导致这些传输信道在饱和区域中操作。在这种情况下，这些技术将在饱和区域中运行的传输信道的多余发射功率重新分配到在饱和区域以下运行的其它传输信道。以这种方式，对于“较差”的传输信道可以实现更高的数据速率，而不牺牲“更好”的传输信道的性能。

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