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1. 发明申请

US20070041457A1 Method and apparatus for providing antenna diversity in a wireless communication system 审中-公开
标题翻译：在无线通信系统中提供天线分集的方法和装置
公开(公告)号：US20070041457A1
公开(公告)日：2007-02-22
申请号：US11261823
申请日：2005-10-27
申请人： Tamer Kadous , Aamod Khadekar , Dhananjay Gore , Alexei Gorokhov
发明人： Tamer Kadous , Aamod Khadekar , Dhananjay Gore , Alexei Gorokhov
IPC分类号： H04K1/10
CPC分类号： H04L5/0023 , H04B7/0456 , H04B7/061 , H04B7/0671 , H04B7/0691 , H04B7/0697 , H04L27/2602
摘要： Transmission schemes that can flexibly achieve the desired spatial multiplexing order, spatial diversity order, and channel estimation overhead order are described. For data transmission, the assigned subcarriers and spatial multiplexing order (M) for a receiver are determined, where M≧1. For each assigned subcarrier, M virtual antennas are selected from among V virtual antennas formed with V columns of an orthonormal matrix, where V≧M. V may be selected to achieve the desired spatial diversity order and channel estimation overhead order. Output symbols are mapped to the M virtual antennas selected for each assigned subcarrier by applying the orthonormal matrix. Pilot symbols are also mapped to the V virtual antennas. The mapped symbols are provided for transmission from T transmit antennas, where T≧V. Transmission symbols are generated for the mapped symbols, e.g., based on OFDM or SC-FDMA. Different cyclic delays may be applied for the T transmit antennas to improve diversity.
摘要翻译：描述了可以灵活地实现期望的空间复用顺序，空间分集顺序和信道估计开销顺序的传输方案。对于数据传输，确定接收机的分配子载波和空间复用顺序（M），其中M> = 1。对于每个分配的子载波，从形成有正交矩阵的V列的V个虚拟天线中选择M个虚拟天线，其中V> = M。可以选择V以实现期望的空间分集顺序和信道估计开销顺序。通过应用正交矩阵将输出符号映射到为每个分配的副载波选择的M个虚拟天线。导频符号也映射到V虚拟天线。所映射的符号被提供用于从T个发射天线传输，其中T> = V。为映射符号生成传输符号，例如，基于OFDM或SC-FDMA。可以对T发射天线应用不同的循环延迟以改善分集。

2. 发明申请

US20070049218A1 Precoding and SDMA support 有权
标题翻译：预编码和SDMA支持
公开(公告)号：US20070049218A1
公开(公告)日：2007-03-01
申请号：US11401979
申请日：2006-04-10
申请人： Alexei Gorokhov , Dhananjay Gore , Gwendolyn Barriac , Jibing Wang , Tamer Kadous
发明人： Alexei Gorokhov , Dhananjay Gore , Gwendolyn Barriac , Jibing Wang , Tamer Kadous
IPC分类号： H04B1/02 , H04B1/66
CPC分类号： H04L1/0001 , H04B7/0417 , H04B7/063 , H04B7/0639 , H04B7/0663 , H04B7/0689 , H04L1/06 , H04W72/04
摘要： Embodiments are described in connection with enhancing performance in a wireless communication system using codebook technology. According to an embodiment is a method for enhancing performance in a wireless communication environment. The method can include receiving a user preference for a transmission mode, associating the user preference with an entry or entries in a codebook, and assigning the user to a transmission mode corresponding to the entry or entries. The transmission mode can be one of a preceding, space division multiple access (SDMA), SDMA preceding, multiple input multiple output (MIMO), MIMO preceding, MIMO-SDMA and a diversity. Each entry can correspond to a transmission mode.
摘要翻译：结合增强使用码本技术的无线通信系统中的性能来描述实施例。根据实施例是用于增强无线通信环境中的性能的方法。该方法可以包括接收用户对传输模式的偏好，将用户偏好与码本中的条目或条目相关联，并将用户分配给与条目或条目相对应的传输模式。传输模式可以是先前的空分多址（SDMA），前面的SDMA，多输入多输出（MIMO），先前的MIMO，MIMO-SDMA和分集之一。每个条目可以对应于传输模式。

3. 发明申请

US20060233131A1 Channel quality reporting for adaptive sectorization 有权
标题翻译：渠道质量报告适应部门化
公开(公告)号：US20060233131A1
公开(公告)日：2006-10-19
申请号：US11261822
申请日：2005-10-27
申请人： Dhananjay Gore , Alexei Gorokhov , Tingfang Ji , Aamod Khandekar , Tamer Kadous
发明人： Dhananjay Gore , Alexei Gorokhov , Tingfang Ji , Aamod Khandekar , Tamer Kadous
IPC分类号： H04Q7/00
CPC分类号： H04W72/08 , H04B1/7143 , H04B7/043 , H04B7/0632 , H04B7/065 , H04B7/0689 , H04B7/0697 , H04L1/0026 , H04L1/0027 , H04L1/20 , H04L5/0023 , H04L5/0037 , H04L5/0051 , H04L5/0057 , H04L5/006
摘要： Apparatuses and methodologies are described that enhance performance in a wireless communication system using beamforming transmissions. According to one aspect, the channel quality is monitored. Channel quality indicators can be used to select a scheduling technique, such as space division multiplexing (SDM), multiple-input multiple output (MIMO) transmission and opportunistic beamforming for one or more user devices. In addition, the CQI can be used to determine the appropriate beam assignment or to update the beam pattern.
摘要翻译：描述了使用波束成形传输来增强在无线通信系统中的性能的装置和方法。根据一个方面，监视信道质量。信道质量指示符可以用于选择诸如空分复用（SDM），多输入多输出（MIMO）传输和一个或多个用户设备的机会波束成形的调度技术。另外，可以使用CQI来确定适当的波束分配或更新波束图案。

4. 发明申请

US20070133668A1 AVERAGE-TAP ENERGY BASED THRESHOLDING FOR CHANNEL ESTIMATION IN MULTI ANTENNA SYSTEMS 有权
标题翻译：用于多天线系统中通道估计的平均能量能量阈值
公开(公告)号：US20070133668A1
公开(公告)日：2007-06-14
申请号：US11560735
申请日：2006-11-16
申请人： Ayman Naguib , Dhananjay Gore , Alexei Gorokhov , Tamer Kadous
发明人： Ayman Naguib , Dhananjay Gore , Alexei Gorokhov , Tamer Kadous
IPC分类号： H04B17/00
CPC分类号： H04L27/2647 , H04L1/0631 , H04L25/022
摘要： Techniques to facilitate estimating the frequency response of a wireless channel in an OFDM system are provided. The method and systems allow for combining signal information across multiple communication channels at one or more channel tap delays in order to determine appropriate taps for channel information.
摘要翻译：提供了有助于估计OFDM系统中的无线信道的频率响应的技术。该方法和系统允许在一个或多个信道抽头延迟的情况下在多个通信信道上组合信号信息，以便确定用于信道信息的合适的抽头。

5. 发明申请

US20060286974A1 Adaptive sectorization in cellular systems 有权
公开(公告)号：US20060286974A1
公开(公告)日：2006-12-21
申请号：US11260895
申请日：2005-10-27
申请人： Dhananjay Gore , Alexei Gorokhov , Hemanth Sampath , Tingfang Ji , Tamer Kadous
发明人： Dhananjay Gore , Alexei Gorokhov , Hemanth Sampath , Tingfang Ji , Tamer Kadous
IPC分类号： H04Q7/20
CPC分类号： H04W16/00 , H04B7/0408 , H04B7/0695 , H04W16/24 , H04W16/28 , H04W72/046 , H04W72/085
摘要： Apparatuses and methodologies are described that enhance performance in a wireless communication system using beamforming transmissions. According to one aspect, a set of transmit beams are defined that simultaneously provides for space division multiplexing, multiple-input multiple output (MIMO transmission and opportunistic beamforming. The addition of a wide beam guarantees a minimum acceptable performance for all user devices.

6. 发明申请

US20060014499A1 Multiple modulation schemes in single rate layering wireless communication systems 有权
公开(公告)号：US20060014499A1
公开(公告)日：2006-01-19
申请号：US11155204
申请日：2005-06-16
申请人： Alexei Gorokhov , Avneesh Agrawal , Dhananjay Gore , Tamer Kadous
发明人： Alexei Gorokhov , Avneesh Agrawal , Dhananjay Gore , Tamer Kadous
IPC分类号： H04B1/02 , H04B1/66
CPC分类号： H04L1/005 , H04L1/0003 , H04L1/0041 , H04L1/06
摘要： A MIMO communication system is adapted to encode multiple data streams at the same adaptable rate. Accordingly, the set of all possible modulation/rate combinations to all modulations with common rates is decreased thus resulting in the reduction of the number of possible packet formats carrying the data streams. Rate prediction is made more error-resilient, in part, due to the averaging over all information rates. Furthermore, the signaling overhead of the packets is reduced. Therefore, the tradeoff between the desired transmission rate granularity on the one hand, and robustness/signaling overhead on the other hand, is controlled by adjusting the coding rate.

7. 发明授权

US08457152B2 Multiple modulation schemes in single rate layering wireless communication systems 有权
标题翻译：单速率分层无线通信系统中的多调制方案
公开(公告)号：US08457152B2
公开(公告)日：2013-06-04
申请号：US11155204
申请日：2005-06-16
申请人： Alexei Gorokhov , Avneesh Agrawal , Dhananjay Gore , Tamer Kadous
发明人： Alexei Gorokhov , Avneesh Agrawal , Dhananjay Gore , Tamer Kadous
IPC分类号： H04J3/16 , H04J9/00
CPC分类号： H04L1/005 , H04L1/0003 , H04L1/0041 , H04L1/06
摘要： A MIMO communication system is adapted to encode multiple data streams at the same adaptable rate. Accordingly, the set of all possible modulation/rate combinations to all modulations with common rates is decreased thus resulting in the reduction of the number of possible packet formats carrying the data streams. Rate prediction is made more error-resilient, in part, due to the averaging over all information rates. Furthermore, the signaling overhead of the packets is reduced. Therefore, the tradeoff between the desired transmission rate granularity on the one hand, and robustness/signaling overhead on the other hand, is controlled by adjusting the coding rate.
摘要翻译： MIMO通信系统适于以相同的可适应速率对多个数据流进行编码。因此，对具有公共速率的所有调制的所有可能的调制/速率组合的集合被减少，从而导致承载数据流的可能分组格式的数量的减少。速率预测更具有弹性，部分原因是由于所有信息速率的平均值。此外，分组的信令开销减小。因此，通过调整编码率来控制一方面期望的传输速率粒度与鲁棒性/信令开销之间的权衡。

8. 发明申请

US20070071147A1 Pseudo eigen-beamforming with dynamic beam selection 审中-公开
标题翻译：具有动态波束选择的伪特征波束成形
公开(公告)号：US20070071147A1
公开(公告)日：2007-03-29
申请号：US11454761
申请日：2006-06-15
申请人： Hemanth Sampath , Dhananjay Gore , Alexei Gorokhov , Jibing Wang , Tamer Kadous
发明人： Hemanth Sampath , Dhananjay Gore , Alexei Gorokhov , Jibing Wang , Tamer Kadous
IPC分类号： H04B7/10 , H04L27/28
CPC分类号： H04B7/0417 , H04B7/0404 , H04B7/0617 , H04B7/063 , H04B7/0632 , H04B7/0854 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/0206 , H04L25/021 , H04L25/0228 , H04L25/0248 , H04L25/03343 , H04L27/2601 , H04L2025/03414 , H04L2025/03426 , H04L2025/03802
摘要： Techniques for transmitting data with limited channel information are described. A transmitter (e.g., a base station) obtains channel information for a subset of multiple antennas used for data reception at a receiver (e.g., a terminal). The channel information may include at least one channel response vector for at least one antenna, which is a subset of the multiple antennas at the receiver. The transmitter derives multiple eigenvectors based on the channel information, e.g., using pseudo eigen-beamforming. The transmitter selects at least one eigenvector from among the multiple eigenvectors and transmits data with the selected eigenvector(s). The transmitter may select and use different subsets of eigenvector(s) in different time intervals. The transmitter may arrange the multiple eigenvectors into multiple sets based on their eigenvalues, select at least one set based on a MIMO transmission rank, and select one eigenvector from each set.
摘要翻译：描述了用有限信道信息发送数据的技术。发射机（例如，基站）在接收机（例如，终端））获得用于数据接收的多个天线的子集的信道信息。信道信息可以包括用于至少一个天线的至少一个信道响应向量，其是接收机处的多个天线的子集。发射机基于信道信息导出多个特征向量，例如使用伪特征波束形成。发射机从多个特征向量中选择至少一个特征向量，并用所选择的特征向量发送数据。发射机可以在不同的时间间隔内选择和使用不同的特征向量子集。发射机可以基于它们的特征值将多个特征向量排列成多个集合，基于MIMO传输秩选择至少一个集合，并从每个集合中选择一个特征向量。

9. 发明申请

US20060203891A1 Systems and methods for beamforming and rate control in a multi-input multi-output communication systems 有权
标题翻译：多输入多输出通信系统中的波束成形和速率控制的系统和方法
公开(公告)号：US20060203891A1
公开(公告)日：2006-09-14
申请号：US11186697
申请日：2005-07-20
申请人： Hemanth Sampath , Tamer Kadous , Alexei Gorokhov , Dhananjay Gore
发明人： Hemanth Sampath , Tamer Kadous , Alexei Gorokhov , Dhananjay Gore
IPC分类号： H04B1/713 , H04K1/10
CPC分类号： H04B7/0417 , H04B7/0617 , H04B7/063 , H04B7/0632 , H04L27/2601
摘要： Methods and apparatuses are disclosed that determine a type of channel information based upon whether a wireless device is scheduled to receive symbols. In addition, a determination may be as to a number of hop periods to determine the type of channel information. Further, a distance between hop regions may be utilized to determine a type of channel information.
摘要翻译：公开了基于无线设备是否被调度为接收符号来确定信道信息的类型的方法和装置。此外，确定可以确定频道信息的类型的跳数周期数。此外，可以利用跳频区域之间的距离来确定频道信息的类型。

10. 发明申请

US20060203708A1 Systems and methods for beamforming feedback in multi antenna communication systems 有权
公开(公告)号：US20060203708A1
公开(公告)日：2006-09-14
申请号：US11233844
申请日：2005-09-21
申请人： Hemanth Sampath , Aamod Khandekar , Dhananjay Gore , Alexei Gorokhov , Tamer Kadous
发明人： Hemanth Sampath , Aamod Khandekar , Dhananjay Gore , Alexei Gorokhov , Tamer Kadous
IPC分类号： H04B7/00 , H04J11/00
CPC分类号： H04B7/0634 , H04B7/0417 , H04B7/0617 , H04B7/063 , H04B7/0632 , H04B7/0639 , H04B7/0645
摘要： Methods and apparatuses are disclosed that determine whether to feedback, and the amount of feedback, with respect to eigenbeam information based upon channel resources. Additionally, methods and apparatuses are disclosed that determine whether to feedback, and the amount of feedback, with respect to eigenbeam information based upon channel information and changes in channel information.

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