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61. 发明授权

US07580445B2 Nonlinear precoding in code-division multiple access communication system 有权
标题翻译：码分多址通信系统中的非线性预编码
公开(公告)号：US07580445B2
公开(公告)日：2009-08-25
申请号：US11259442
申请日：2005-10-26
申请人： Xiaodong Wang , Mohammad Madihian
发明人： Xiaodong Wang , Mohammad Madihian
IPC分类号： H04B1/69 , H04L27/28
CPC分类号： H04B1/7103 , H04B2201/709709 , H04J13/00
摘要： A precoding technique is herein disclosed for a spread-spectrum transmission system which advantageously addresses intersymbol interference along with multiuser and interchip interference.
摘要翻译：本文公开了一种用于扩频传输系统的预编码技术，其有利地解码符号间干扰以及多用户和芯片间干扰。

62. 发明申请

US20080225974A1 Max-Log Receiver for Multiple-Input Multiple-Output (MIMO) Systems 有权
标题翻译：用于多输入多输出（MIMO）系统的最大对数接收器
公开(公告)号：US20080225974A1
公开(公告)日：2008-09-18
申请号：US11857269
申请日：2007-09-18
申请人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
发明人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04L23/02
CPC分类号： H04L1/0054 , H04L25/03203 , H04L25/03286 , H04L25/03305
摘要： A method includes the steps of i) listing out all possibilities for a first symbol of a two stream signal; ii) determining a second symbol of the two stream signal for each of the first symbol listed out, iii) evaluating a metric for each of the first symbol and second symbol pair, iv) listing out all possibilities for second symbol, v) determining a first symbol for each choice of the second symbol listed out, vi) evaluating a metric for each of the second symbol and first symbol pair, vii) determining an exact maximum log likelihood ratio for all bits using the metrics, and viii) decoding codeword(s) in the two stream signal using the determined exact maximum log likelihood ratio for all bits.
摘要翻译：一种方法包括以下步骤：i）列出两个流信号的第一符号的所有可能性; ii）确定所列出的第一符号中的每一个的两个流信号的第二符号，iii）评估第一符号和第二符号对中的每一个的度量，iv）列出第二符号的所有可能性，v）确定 vi）对所述第二符号和第一符号对中的每个符号对的每一个的度量进行评估，vii）使用所述度量确定所有比特的精确最大对数似然比，以及viii）解码码字（ s）在两个流信号中，使用所确定的所有比特的精确最大对数似然比。

63. 发明申请

US20080225781A1 Group MMSE-DFD with Order and Filter Computation for Reception on a Cellular Downlink 有权
标题翻译：用于在蜂窝下行链路上接收的订单和滤波器计算的组MMSE-DFD
公开(公告)号：US20080225781A1
公开(公告)日：2008-09-18
申请号：US12047527
申请日：2008-03-13
申请人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
发明人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04Q7/00
CPC分类号： H04L1/208 , H04B1/7105 , H04B1/71055 , H04B1/7107 , H04B2201/70702 , H04L1/0045 , H04L1/0606 , H04L1/0656 , H04L1/0668
摘要： A method for decoding in a wireless downlink channel, where all dominant transmitting sources use inner codes from a particular set, including the steps of: estimating a channel matrix seen from each dominant transmitter source in response to a pilot or preamble signal transmitted by each such source; converting each estimated channel matrix into an effective channel matrix responsive to the inner code of the corresponding transmitting source; obtaining the received observations in a linear equivalent form whose output is an equivalent of the received observations and in which the effective channel matrix corresponding to each dominant transmitting source inherits the structure of its inner code; i) determining an order for processing each of the transmitting sources; ii) computing a filter for each transmitting source that will be decoded; iii) demodulating and decoding each transmitting source responsive to the determined order from step i) assuming perfect cancellation of signals of preceding or previously decoded transmitting sources; and iv) re-encoding the decoded message of each transmitting source, except the source decoded last, responsive to the modulation and coding scheme employed by the source and the corresponding effective channel matrix and subtracting it from the received observations in the equivalent linear form.
摘要翻译：一种用于在无线下行链路信道中进行解码的方法，其中所有主要发送源使用来自特定集合的内部代码，包括以下步骤：响应于由每个这样发送的导频或前导信号，估计从每个主要发射机源看到的信道矩阵资源; 响应于相应的发射源的内部码，将每个估计的信道矩阵转换成有效信道矩阵; 以等效的线性等价形式获得所接收的观测值，其输出等于所接收的观测值，并且其中对应于每个主要发射源的有效信道矩阵继承其内部码的结构; i）确定处理每个发送源的顺序; ii）计算将被解码的每个发射源的滤波器; iii）响应于来自步骤i）的所确定的顺序对每个发射源进行解调和解码，假设完全消除先前或先前解码的发射源的信号; 以及iv）响应于源采用的调制和编码方案以及对应的有效信道矩阵，并且以等效线性形式从接收到的观察中减去每个发送源的解码消息，除了最后解码的源之外，对每个发送源的解码消息进行重新编码。

64. 发明申请

US20080225763A1 Group MMSE-DFD with Rate (SINR) Feedback and Without Pre-Determined Decoding Order for Reception on a Cellular Downlink 有权
标题翻译：具有速率（SINR）反馈的组MMSE-DFD和在蜂窝下行链路上接收的预定解码顺序
公开(公告)号：US20080225763A1
公开(公告)日：2008-09-18
申请号：US12047555
申请日：2008-03-13
申请人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
发明人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04B7/00
CPC分类号： H04W88/06 , H04W4/06 , H04W24/00 , H04W84/042
摘要： In accordance with the invention, a method includes the steps of: i) initializing with channel matrix estimates and inner codes of all co-channel transmitter sources in a wireless network, modulation and coding schemes of all sources not of interest; ii) converting each channel matrix estimate into an effective channel matrix responsive to the inner code of the corresponding transmitter source; iii) selecting iteratively from a first set of transmitter sources transmitting at fixed rates, a transmitter source which maximizes a first metric; iv) computing iteratively a filter for the transmitter source which maximizes the first metric; v) selecting iteratively from a second set of transmitter sources of interest, a transmitter source which maximizes a second metric; vi) computing iteratively a rate and a filter for the transmitter source which maximizes the second metric; and vii) obtaining an ordered set of indices of all transmitter sources that will be decoded along with their corresponding filters, and feedback rates for all transmitter sources of interest.
摘要翻译：根据本发明，一种方法包括以下步骤：i）利用无线网络中的所有同频发射机源的信道矩阵估计和内码初始化，不感兴趣的所有源的调制和编码方案; ii）响应于相应发射机源的内部码，将每个信道矩阵估计转换成有效信道矩阵; iii）从以固定速率发送的第一组发射机源迭代地选择使得第一度量最大化的发射机源; iv）迭代地计算用于使第一度量最大化的发射机源的滤波器; v）从第二组感兴趣的发射源迭代地选择最大化第二度量的发射机源; vi）迭代地计算用于使第二度量最大化的发射机源的速率和滤波器; 以及vii）获得将被解码的所有发射机源的有序集合以及其相应的滤波器，以及所有感兴趣的发射机源的反馈速率。

65. 发明申请

US20080130672A1 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：US20080130672A1
公开(公告)日：2008-06-05
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： H04L29/02
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。

66. 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。

67. 发明申请

US20070283210A1 Design of Spherical Lattice Codes for Lattice and Lattice-Reduction-Aided Decoders 有权
标题翻译：用于晶格和晶格减少辅助解码器的球形晶格码设计
公开(公告)号：US20070283210A1
公开(公告)日：2007-12-06
申请号：US11694241
申请日：2007-03-30
申请人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
发明人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
IPC分类号： H03M13/00
CPC分类号： H03M13/01 , H04L1/0631 , H04L1/0637
摘要： Methods and apparatus for designing spherical lattice codebooks for use in data transmission systems are provided. A spherical lattice codebook is constructed by determining the channel statistics of one or more channels, which can be accomplished by observing a sufficiently large set of channel realizations. After determining the channel statistics, an expression for the error probability of the decoder or expressions for bounds on the error probability and expressions for the corresponding gradients are determined. The gradient is then used in an optimization technique to produce a spherical lattice codebook which is subsequently used for transmission.
摘要翻译：提供了用于数据传输系统中使用的球面晶格码本的方法和装置。通过确定一个或多个信道的信道统计量来构造球面晶格码本，其可以通过观察足够大的信道实现集来实现。在确定信道统计后，确定解码器的错误概率或对于对应梯度的误差概率和表达式的边界的表达式的表达式。然后将梯度用于优化技术中以产生随后用于传输的球形晶格码本。

68. 发明申请

US20070111757A1 Method and Apparatus for Cross Layer Resource Allocation for Wireless Backhaul Networks 有权
标题翻译：用于无线回程网络的跨层资源分配的方法和装置
公开(公告)号：US20070111757A1
公开(公告)日：2007-05-17
申请号：US11420137
申请日：2006-05-24
申请人： Min Cao , Xiaodong Wang , Seung-Jun Kim , Mohammad Madihian
发明人： Min Cao , Xiaodong Wang , Seung-Jun Kim , Mohammad Madihian
IPC分类号： H04B1/38
CPC分类号： H04L47/14 , H04W40/00 , H04W40/06 , H04W52/343 , H04W52/346 , H04W52/42 , H04W52/46 , H04W84/18 , Y02D70/142 , Y02D70/146 , Y02D70/22 , Y02D70/322
摘要： A method and apparatus is disclosed whereby the scheduling of network transmissions in a wireless backhaul network is determined using a cross-layer optimization algorithm. In a first embodiment, the algorithm assumes a good MAC layer transmit schedule has been provided and computes optimal network layer routes as well as transmit beam patterns and transmit powers in a semi-distributed manner. According to this embodiment, the optimization goal is the throughput from each access point, or node in the network, to the core network. In another embodiment, an independent set of transmitting nodes is determined at the MAC layer in a way such that no link in the set interferes with another link and no link is scheduled to transmit and receive at the same time. According to this embodiment, a column generation algorithm is used to find a maximal weighted independent set and to achieve optimal network transmission throughput.
摘要翻译：公开了一种方法和装置，其中使用跨层优化算法确定无线回程网络中网络传输的调度。在第一实施例中，算法假定已经提供了良好的MAC层传输调度，并且以半分布式的方式计算最佳网络层路由以及发送波束图案和发射功率。根据该实施例，优化目标是从网络中的每个接入点或节点到核心网络的吞吐量。在另一个实施例中，在MAC层处确定一组独立的发送节点，使得该组中的链路不与另一个链路干扰，并且没有链路被调度以同时发送和接收。根据本实施例，使用列生成算法来找到最大加权独立集合并实现最佳网络传输吞吐量。

69. 发明申请

US20070022362A1 Rate-compatible low density parity check coding for hybrid ARQ 有权
标题翻译：混合ARQ的速率兼容低密度奇偶校验编码
公开(公告)号：US20070022362A1
公开(公告)日：2007-01-25
申请号：US11174043
申请日：2005-07-01
申请人： Guosen Yue , Xiaodong Wang , Mohammad Madihian
发明人： Guosen Yue , Xiaodong Wang , Mohammad Madihian
IPC分类号： H03M13/03
CPC分类号： H03M13/618 , H03M13/1185 , H03M13/1197 , H03M13/6393
摘要： A new rate compatible coding approach is disclosed herein which takes advantage of the structure of irregular repeat accumulate (IRA) type codes, a special class of low density parity check codes.
摘要翻译：本文公开了一种新的速率兼容编码方法，其利用不规则重复累积（IRA）类型码，特殊类别的低密度奇偶校验码的结构。

70. 发明申请

US20070004366A1 Group Decoder with Improved Partitioning for Multiple Antenna Multiuser Channel 有权
标题翻译：用于多天线多用户信道的分组解码器
公开(公告)号：US20070004366A1
公开(公告)日：2007-01-04
申请号：US11428386
申请日：2006-07-01
申请人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
发明人： Narayan Prasad , Xiaodong Wang , Mohammad Madihian
IPC分类号： H04B7/08 , H04B1/06 , H04B7/00 , H04M1/00
CPC分类号： H04L25/03006 , H04L2025/03426
摘要： A group detection arrangement for a multiple antenna receiver structure usable with a multiuser multiple access communication channel with fading is herein disclosed. The group detection arrangement uses an optimized channel dependent group partitioning technique.
摘要翻译：本文公开了一种可用于具有衰落的多用户多址通信信道的多天线接收机结构的组检测装置。组检测装置使用优化的信道相关组分割技术。

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