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1. 发明授权

US08275322B2 Rateless coding for multiuser interference relay channel 有权
标题翻译：无源编码多用户干扰中继通道
公开(公告)号：US08275322B2
公开(公告)日：2012-09-25
申请号：US12432232
申请日：2009-04-29
申请人： Mohammad A. Khojastepour , Xiaodong Wang
发明人： Mohammad A. Khojastepour , Xiaodong Wang
IPC分类号： H04B1/00
CPC分类号： H04B7/155 , H04B7/15521 , H04B7/15557
摘要： An interference relay channel (IRC) utilizes a single relay to assist communications between multiple source-destination links under the half-duplex (HD) constraint. It is assumed that each source has an independent message and its transmitted signal may cause interference at the other destinations. It is also assumed that each node only estimates its backward channels and has no knowledge of its forward channels as well as the other links. The role of the relay is to generate signals to cooperate with the intended signal and mitigate the interference at all destinations.
摘要翻译：干扰中继信道（IRC）利用单个中继来辅助半双工（HD）约束下的多个源 - 目的链路之间的通信。假设每个源具有独立的消息，并且其发送的信号可能在其他目的地造成干扰。还假设每个节点仅估计其反向信道，并且不知道其前向信道以及其他链路。继电器的作用是产生与预期信号配合的信号，并减轻所有目的地的干扰。

2. 发明申请

US20120140850A1 Codebook Method for a Multiple Input Multiple Output Wireless System 审中-公开
公开(公告)号：US20120140850A1
公开(公告)日：2012-06-07
申请号：US13370441
申请日：2012-02-10
申请人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
发明人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04B7/02 , H04B1/02 , H04L27/00
CPC分类号： H04L25/03006 , H04L25/03343 , H04L2025/03426
摘要： A method for wireless encoding includes encoding wireless multiple input and multiple output signals in accordance with a codebook being one of a discrete codebook restricting elements of codebook entries to be within a predetermined finite set of complex numbers and a constant amplitude codebook including each entry in its codebook having equal column norm and equal row norm. In a preferred embodiment the digital codebook further includes restricting elements of a finite set in the discrete codebook to be in the form of ka+jkb for a base-k computer and the constant amplitude codebook further includes being obtained through a series of successive householder transformations. In a preferred embodiment the codebook is configured as one of a constrained codebook in which the codebook is configured for multiple scenarios and a discrete codebook.

3. 发明授权

US07839835B2 Quantized precoding over a set of parallel channels 有权
标题翻译：通过一组并行通道进行量化预编码
公开(公告)号：US07839835B2
公开(公告)日：2010-11-23
申请号：US11693286
申请日：2007-03-29
申请人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
发明人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04J1/00
CPC分类号： H04B7/0632 , H04B7/043 , H04B7/0456 , H04B7/0478 , H04B7/0617 , H04B7/0639
摘要： Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive preceding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal preceding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.
摘要翻译：公开了用于在一组并行通道上设计预编码器的连续多级波束形成策略（例如，连续的前述策略）的方法和装置。连续波束成形被应用于窄带信道模型，并且还被应用于单个波束成形向量（例如，递归波束成形）的更精细量化。第一实施例提供了高复杂度的最佳方法。替代实施例提供了连续的波束形成，用于具有中等复杂度的接近最优先前选择。还提供了一种用于预编码器选择的低复杂度方法，其中确定用于该组并行信道的信道代表性矩阵，并且应用所计算的信道代表上的连续波束成形。

4. 发明授权

US07715863B2 Throughput maximization using quantized rate control in multiple antenna communication 有权
标题翻译：在多天线通信中使用量化速率控制的吞吐量最大化
公开(公告)号：US07715863B2
公开(公告)日：2010-05-11
申请号：US11421731
申请日：2006-06-01
申请人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
发明人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04Q7/32
CPC分类号： H04W52/248 , H04B7/04 , H04L1/0002 , H04L1/0026 , H04L1/0618
摘要： A feedback link between a receiver and a transmitter in a multiple antenna communication system is used to control the transmission rate and thereby improve system throughput performance.
摘要翻译：多天线通信系统中的接收机和发射机之间的反馈链路用于控制传输速率，从而提高系统吞吐量性能。

5. 发明申请

US20090270028A1 Rateless Coding for Multiuser Interference Relay Channel 有权
标题翻译：无源编码用于多用户干扰中继信道
公开(公告)号：US20090270028A1
公开(公告)日：2009-10-29
申请号：US12432232
申请日：2009-04-29
申请人： Mohammad A. Khojastepour , Xiaodong Wang
发明人： Mohammad A. Khojastepour , Xiaodong Wang
IPC分类号： H04B7/14
CPC分类号： H04B7/155 , H04B7/15521 , H04B7/15557
摘要： An interference relay channel (IRC) utilizes a single relay to assist communications between multiple source-destination links under the half-duplex (HD) constraint. It is assumed that each source has an independent message and its transmitted signal may cause interference at the other destinations. It is also assumed that each node only estimates its backward channels and has no knowledge of its forward channels as well as the other links. The role of the relay is to generate signals to cooperate with the intended signal and mitigate the interference at all destinations.
摘要翻译：干扰中继信道（IRC）利用单个中继来辅助半双工（HD）约束下的多个源 - 目的链路之间的通信。假设每个源具有独立的消息，并且其发送的信号可能在其他目的地造成干扰。还假设每个节点仅估计其反向信道，并且不知道其前向信道以及其他链路。继电器的作用是产生与预期信号配合的信号，并减轻所有目的地的干扰。

6. 发明申请

US20130170445A1 Multi-user downlink linear MIMO precoding system 有权
公开(公告)号：US20130170445A1
公开(公告)日：2013-07-04
申请号：US13617991
申请日：2012-09-14
申请人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
发明人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04W72/04
CPC分类号： H04W72/042 , H04B7/0417 , H04B7/0452 , H04B7/0465 , H04B7/0626 , H04B7/0639 , H04L1/0001 , H04L1/06
摘要： A method implemented in a base station used for a downlink multi-user (MU) multi-input multi-output (MIMO) system is disclosed. The method includes receiving an indication of a quantized matrix from each of a plurality of scheduled user equipments, precoding data streams for the plurality of scheduled user equipments, transmitting the precoded data to the plurality of scheduled user equipments. Other methods and some apparatuses for wireless communications also are disclosed.

7. 发明申请

US20120033756A1 Multi-User Downlink Linear MIMO Precoding System 有权
标题翻译：多用户下行线性MIMO预编码系统
公开(公告)号：US20120033756A1
公开(公告)日：2012-02-09
申请号：US13273880
申请日：2011-10-14
申请人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
发明人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04L1/02
CPC分类号： H04W72/042 , H04B7/0417 , H04B7/0452 , H04B7/0465 , H04B7/0626 , H04B7/0639 , H04L1/0001 , H04L1/06
摘要： Multi-user (MU-) MIMO systems with quantized feedback are designed to maximize the sum-rate via scheduling and linear precoding. To maximize throughput over the network, quantized CSIT is sent through a low-rate feedback link feedback from a plurality of users back to a base station. The base station then determines a subset of the plurality of users to transmit one or more signals to based on the received feedback and determines a preceding matrix based on the received feedback from the plurality of users wherein the precoding matrix maximizes a sum-rate throughput for the subset of the plurality of users. Additionally, based on the received feedback, the base station designs a quantization codebook. This codebook may be designed off-line and/or online. The codebook and/or precoding matrix are used to transmit signals to the users.
摘要翻译：设计了具有量化反馈的多用户（MU-）MIMO系统，以通过调度和线性预编码来最大化总和速率。为了使网络上的吞吐量最大化，量化的CSIT通过从多个用户返回到基站的低速率反馈链路反馈发送。基站然后基于所接收的反馈确定多个用户的子集以发送一个或多个信号，并且基于来自多个用户的接收到的反馈来确定先前的矩阵，其中预编码矩阵使和速率吞吐量最大化多个用户的子集。另外，基于接收到的反馈，基站设计量化码本。该码本可以离线和/或在线设计。码本和/或预编码矩阵用于向用户发送信号。

8. 发明申请

US20080159425A1 Design of multi-user downlink linear MIMO precoding systems 有权
标题翻译：多用户下行线性MIMO预编码系统的设计
公开(公告)号：US20080159425A1
公开(公告)日：2008-07-03
申请号：US12002874
申请日：2007-12-19
申请人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
发明人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04L27/28
CPC分类号： H04W72/042 , H04B7/0417 , H04B7/0452 , H04B7/0465 , H04B7/0626 , H04B7/0639 , H04L1/0001 , H04L1/06
摘要： Multi-user (MU-) MIMO systems with quantized feedback are designed to maximize the sum-rate via scheduling and linear precoding. To maximize throughput over the network, quantized CSIT is sent through a low-rate feedback link feedback from a plurality of users back to a base station. The base station then determines a subset of the plurality of users to transmit one or more signals to based on the received feedback and determines a preceding matrix based on the received feedback from the plurality of users wherein the precoding matrix maximizes a sum-rate throughput for the subset of the plurality of users. Additionally, based on the received feedback, the base station designs a quantization codebook. This codebook may be designed off-line and/or online. The codebook and/or precoding matrix are used to transmit signals to the users.
摘要翻译：设计了具有量化反馈的多用户（MU-）MIMO系统，以通过调度和线性预编码来最大化总和速率。为了使网络上的吞吐量最大化，量化的CSIT通过从多个用户返回到基站的低速率反馈链路反馈发送。基站然后基于所接收的反馈确定多个用户的子集以发送一个或多个信号，并且基于来自多个用户的接收到的反馈来确定先前的矩阵，其中预编码矩阵使和速率吞吐量最大化多个用户的子集。另外，基于接收到的反馈，基站设计量化码本。该码本可以离线和/或在线设计。码本和/或预编码矩阵用于向用户发送信号。

9. 发明申请

US20120275535A1 Codebook Method for a Multiple Input Multiple Output Wireless System 审中-公开
标题翻译：多输入多输出无线系统的码本方法
公开(公告)号：US20120275535A1
公开(公告)日：2012-11-01
申请号：US13547422
申请日：2012-07-12
申请人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
发明人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04B7/06 , H04B7/08
CPC分类号： H04L25/03006 , H04L25/03343 , H04L2025/03426
摘要： A method for wireless encoding includes encoding wireless multiple input and multiple output signals in accordance with a codebook being one of a discrete codebook restricting elements of codebook entries to be within a predetermined finite set of complex numbers and a constant amplitude codebook including each entry in its codebook having equal column norm and equal row norm. In a preferred embodiment the digital codebook further includes restricting elements of a finite set in the discrete codebook to be in the form of ka+jkb for a base-k computer and the constant amplitude codebook further includes being obtained through a series of successive householder transformations. In a preferred embodiment the codebook is configured as one of a constrained codebook in which the codebook is configured for multiple scenarios and a discrete codebook.
摘要翻译：一种用于无线编码的方法，包括：根据码本中的码本编码无线多输入信号和多输出信号，该码本是将码本条目的元件限制在预定有限的复数集合之内的码本，以及包括其中的每个条目的恒定码本码本具有相等的列范数和相等的行范数。在优选实施例中，数字码本还包括将离散码本中的有限集的限制要素限制为基k计算机的形式为ka + jkb，并且恒幅码书还包括通过一系列连续的家庭转换获得。在优选实施例中，码本被配置为受限码本之一，其中码本被配置用于多个场景和离散码本。

10. 发明申请

US20120250791A1 Codebook Method for a Multiple Input Multiple Output Wireless System 有权
公开(公告)号：US20120250791A1
公开(公告)日：2012-10-04
申请号：US13524286
申请日：2012-06-15
申请人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
发明人： Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04B7/02 , H04B1/02 , H04L27/00
CPC分类号： H04L25/03006 , H04L25/03343 , H04L2025/03426
摘要： A method for wireless encoding includes encoding wireless multiple input and multiple output signals in accordance with a codebook being one of a discrete codebook restricting elements of codebook entries to be within a predetermined finite set of complex numbers and a constant amplitude codebook including each entry in its codebook having equal column norm and equal row norm. In a preferred embodiment the digital codebook further includes restricting elements of a finite set in the discrete codebook to be in the form of ka+jkb for a base-k computer and the constant amplitude codebook further includes being obtained through a series of successive householder transformations. In a preferred embodiment the codebook is configured as one of a constrained codebook in which the codebook is configured for multiple scenarios and a discrete codebook.

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