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1. 发明申请

US20070294063A1 Automatic-Repeat-Request Throughput Over Parallel Channels 审中-公开
标题翻译：并行通道自动重发请求吞吐量
公开(公告)号：US20070294063A1
公开(公告)日：2007-12-20
申请号：US11692978
申请日：2007-03-29
申请人： Chuxiang Li , Xiaodong Wang , Mohammad Madihian
发明人： Chuxiang Li , Xiaodong Wang , Mohammad Madihian
IPC分类号： G06F17/10 , H04L25/60
CPC分类号： H04L1/1822 , H04L5/0023
摘要： Methods and apparatus for using automatic-repeat-request (ARQ) protocols in multiple parallel channel systems are provided. In parallel channel systems (e.g., MIMO and/or OFDM systems), various ARQ protocols are employed to increase system throughput. Methods of analysis of the throughput of these protocols are also provided to determine an appropriate protocol. These methods include determining the parameters of a packet-layer model from the physical-layer model parameters and the transceiver parameters using Markov modeling techniques. That is, the rate of a state of the ARQ system is determined and the throughput of the ARQ system is then determined based on the rate using a physical-layer Markov model.
摘要翻译：提供了在多个并行通道系统中使用自动重复请求（ARQ）协议的方法和装置。在并行信道系统（例如，MIMO和/或OFDM系统）中，采用各种ARQ协议来增加系统吞吐量。还提供了分析这些协议的吞吐量的方法以确定适当的协议。这些方法包括使用马尔可夫建模技术从物理层模型参数和收发器参数确定分组层模型的参数。也就是说，确定ARQ系统状态的速率，然后基于使用物理层马尔可夫模型的速率来确定ARQ系统的吞吐量。

2. 发明授权

US07743315B2 System and method for low-density parity check (LDPC) code design 失效
标题翻译：用于低密度奇偶校验（LDPC）码设计的系统和方法
公开(公告)号：US07743315B2
公开(公告)日：2010-06-22
申请号：US11533978
申请日：2006-09-21
申请人： Chuxiang Li , Guosen Yue , Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
发明人： Chuxiang Li , Guosen Yue , Mohammad A. Khojastepour , Xiaodong Wang , Mohammad Madihian
IPC分类号： H03M13/00
CPC分类号： H03M13/1105 , H03M13/033 , H03M13/6393
摘要： Disclosed is a density evolution algorithm based on a refined definition of node and edge densities for different parts of the code. In particular, density functions ƒV(1)(i) and ƒV(2)(i) of the output edges of the variable nodes with degree i within different codeword regions w1 and we, respectively, are defined and then calculated. Further, density functions ƒC(1)(j) and ƒC(2)(j) of the output edges for check nodes with degree j within codeword regions w1 and we, respectively, are defined and then calculated. Mixture density functions of output check edges connecting variable nodes in the first codeword region and the second codeword region are then calculated to determine an LDPC code design.
摘要翻译：公开了基于代码不同部分的节点和边缘密度的精确定义的密度演化算法。特别地，分别定义然后计算在不同码字区域w1和we1内分别具有度数i的可变节点的输出边缘的密度函数ƒV（1）（i）和ƒV（2）（i）。此外，分别定义并计算出码字区域w1和we分别具有度j的校验节点的输出边缘的密度函数ƒC（1）（j）和ƒC（2）（j）。然后计算连接第一码字区域和第二码字区域中的可变节点的输出校验边缘的混合密度函数，以确定LDPC码设计。

3. 发明申请

US20070113146A1 System and Method for Low-Density Parity Check (LDPC) Code Design 失效
标题翻译：用于低密度奇偶校验（LDPC）码设计的系统和方法
公开(公告)号：US20070113146A1
公开(公告)日：2007-05-17
申请号：US11533978
申请日：2006-09-21
申请人： Chuxiang Li , Guosen Yue , Mohammad Khojastepour , Xiadong Wang , Mohammad Madihian
发明人： Chuxiang Li , Guosen Yue , Mohammad Khojastepour , Xiadong Wang , Mohammad Madihian
IPC分类号： H03M13/00
CPC分类号： H03M13/1105 , H03M13/033 , H03M13/6393
摘要： Disclosed is a density evolution algorithm based on a refined definition of node and edge densities for different parts of the code. In particular, density functions ƒV(1)(i) and ƒV(2)(i) of the output edges of the variable nodes with degree i within different codeword regions w1 and we, respectively, are defined and then calculated. Further, density functions ƒC(1)(j) and ƒC(2)(j) of the output edges for check nodes with degree j within codeword regions w1 and we, respectively, are defined and then calculated. Mixture density functions of output check edges connecting variable nodes in the first codeword region and the second codeword region are then calculated to determine an LDPC code design.
摘要翻译：公开了基于代码不同部分的节点和边缘密度的精确定义的密度演化算法。特别地，（i）和（ii）（i）的浓度函数f（i）分别在不同码字区域w 1和w e e中的等级i的可变节点的输出边缘被分别定义然后被计算。此外，密度函数f（1）（j）和（C）的密度函数分别定义并且然后计算在码字区域w 1和w e e中的具有度j的校验节点的输出边缘。然后计算连接第一码字区域和第二码字区域中的可变节点的输出校验边缘的混合密度函数，以确定LDPC码设计。

4. 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。

5. 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.

6. 发明授权

US08014460B2 Method for multiple-input-multiple-output system demodulation 有权
标题翻译：多输入多输出系统解调方法
公开(公告)号：US08014460B2
公开(公告)日：2011-09-06
申请号：US11613407
申请日：2006-12-20
申请人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
发明人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04B7/02
CPC分类号： H04L25/03203 , H04L25/0204
摘要： A MMSE-based deterministic sequential Monte Carlo (SMC) method for MIMO demodulation exhibiting square root complexity in terms of constellation size. Further extensions to the method reduce the search space resulting in significant reduction in computational requirements while minimally impacting performance. As a hard decision algorithm, the methods achieve sphere decoder performance while imposing a much smaller computational load.
摘要翻译：基于MMSE的确定性顺序蒙特卡罗（SMC）方法，用于在星座大小方面表现出平方根复杂度的MIMO解调。该方法的进一步扩展减少了搜索空间，导致计算需求的显着降低，同时最小程度上影响了性能。作为硬判决算法，该方法实现了球体解码器的性能，同时施加了更小的计算量。

7. 发明授权

US07949318B2 Multi-rank beamforming precoding apparatus and method 有权
标题翻译：多级波束成形预编码装置及方法
公开(公告)号：US07949318B2
公开(公告)日：2011-05-24
申请号：US12026120
申请日：2008-02-05
申请人： Narayan Prasad , Mohammad Ali Khojastepour , Mohammad Madihian , Xiaodong Wang
发明人： Narayan Prasad , Mohammad Ali Khojastepour , Mohammad Madihian , Xiaodong Wang
IPC分类号： H04B1/04
CPC分类号： H04B7/0617 , H04B7/0456 , H04B7/0632 , H04B7/0639
摘要： A multi-rank beamforming (MRBF) scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the MRBF transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices having a recursive structure which allows for efficient computation of the optimal precoding matrix and corresponding Signal to Interference and Noise Ratio (SINR). The codebook also enjoys a small storage footprint. Due to the computational efficiency and modest memory requirements, the optimal precoding determination can be made at user equipment (UE) and communicated to a transmitting base station over a limited uplink channel for implementation over the downlink channel.
摘要翻译：相应地确定其中估计下行链路信道并由MRBF发射机使用的最佳预编码矩阵的多级波束成形（MRBF）方案。从具有递归结构的矩阵码本中选择最佳预编码矩阵，其允许有效计算最佳预编码矩阵和对应的信号与干扰和噪声比（SINR）。该码本还具有小的存储空间。由于计算效率和适度的存储器要求，可以在用户设备（UE）进行最佳预编码确定，并通过有限的上行链路信道传送到发射基站，以通过下行链路信道实现。

8. 发明授权

US07843802B2 Method for uplink multiuser OFM with constrained inputs 有权
标题翻译：具有约束输入的上行链路多用户OFM的方法
公开(公告)号：US07843802B2
公开(公告)日：2010-11-30
申请号：US11950037
申请日：2007-12-04
申请人： Guosen Yue , Xiaodong Wang , Mohammad Madihian
发明人： Guosen Yue , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04J11/00 , H04J3/16 , H04L27/36
CPC分类号： H04W52/42 , H04L5/0007 , H04L5/0037 , H04L5/006 , H04L5/0064 , H04W52/346
摘要： A method setting a maximum number of determinations for computing power allocation responsive to allocating power among multiple users in one subchannel of an OFDM system; beginning determination of maximum sum-throughput of users in the OFDM system with a randomly generated power profile with an iteration including: i) computing a sum-throughput using a power profile; ii) keeping a previous power profile if the sum-throughput of the current power profile sum-throughput is less than the previous power profile sum-throughput; iii) finding an index of power profile that has maximum sum-throughput; and ascertaining power profiles when the iteration is complete.
摘要翻译：响应于在OFDM系统的一个子信道中的多个用户之间分配功率而设置用于计算功率分配的最大数量的确定的方法; 开始确定具有迭代的随机生成的功率分布的OFDM系统中的用户的最大和吞吐量，包括：i）使用功率分布计算和吞吐量; ii）如果当前功率曲线和吞吐量的和吞吐量小于先前的功率曲线和吞吐量，则保持先前的功率曲线; iii）找到具有最大和吞吐量的功率曲线的索引; 并在迭代完成时确定功率曲线。

9. 发明授权

US07660360B2 Peak-to-average power ratio reduction with threshold limited selection for coded OFDM systems 有权
标题翻译：峰值与平均功率比降低与编码OFDM系统的阈值限制选择
公开(公告)号：US07660360B2
公开(公告)日：2010-02-09
申请号：US11536263
申请日：2006-09-28
申请人： Guosen Yue , Xiaodong Wang , Mohammad Madihian
发明人： Guosen Yue , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2618 , H04L1/0043 , H04L1/0057 , H04L1/0066 , H04L27/2617
摘要： Disclosed is a coded orthogonal frequency-division multiplexing (OFDM) system and method for reducing a peak-to-average power ratio (PAPR). The system and method include a modulator configured to modulate (e.g., using quadrature amplitude modulation (QAM)) coded bits into symbols. The system and method also include an inverse discrete fourier transform (IDFT) module to perform an IDFT on the symbols to produce an OFDM signal. The system and method measure the PAPR of the OFDM signal and transmit the signal to a receiver if the PAPR of the signal is less than a threshold PAPR.
摘要翻译：公开了用于降低峰均功率比（PAPR）的编码正交频分复用（OFDM）系统和方法。该系统和方法包括配置成将（例如，使用正交幅度调制（QAM））编码比特调制成符号的调制器。该系统和方法还包括对码元执行IDFT以产生OFDM信号的反离散傅里叶变换（IDFT）模块。如果信号的PAPR小于阈值PAPR，则该系统和方法测量OFDM信号的PAPR并将该信号发送到接收机。

10. 发明申请

US20080225774A1 OPTIMAL RESOURCE ALLOCATION IN A MULTI-HOP OFDMA WIRELESS NETWORK WITH COOPERATIVE RELAYING 有权
标题翻译：具有合作中继功能的多通道无线网络中的最优资源分配
公开(公告)号：US20080225774A1
公开(公告)日：2008-09-18
申请号：US11953105
申请日：2007-12-10
申请人： Seung-Jun Kim , Xiaodong Wang , Mohammad Madihian
发明人： Seung-Jun Kim , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04B7/14 , H04J3/00
CPC分类号： H04L5/0058 , H04B7/0617 , H04L5/0023 , H04L5/0037 , H04W28/16 , H04W52/46 , H04W88/04
摘要： An optimal resource allocation strategy for OFDMA multi-hop wireless networks is disclosed. The system allocates one or more resources in a multi-hop network by solving one or more higher-layer sub-problem; solving one or more physical layer and media access control (PHY/MAC) layer sub-problems per tone per time slot with one of cooperative relaying of radio signals or spatial reusing of radio spectrum; updating prices; and allocating radio resources based on the PHY/MAC layer sub-problems.
摘要翻译：公开了OFDMA多跳无线网络的最优资源分配策略。系统通过解决一个或多个更高层次的问题，在多跳网络中分配一个或多个资源; 通过无线电信号的协同中继或无线电频谱的空间重用来解决每时隙每个音调的一个或多个物理层和媒体访问控制（PHY / MAC）层子问题; 更新价格; 以及基于PHY / MAC层子问题分配无线电资源。

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