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61. 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。

62. 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。

63. 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。

64. 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。

65. 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。

66. 发明申请

US20060242319A1 Service Differentiated Downlink Scheduling in Wireless Packet Data Systems 审中-公开
标题翻译：无线分组数据系统中的服务差分下行链路调度
公开(公告)号：US20060242319A1
公开(公告)日：2006-10-26
申请号：US11276379
申请日：2006-02-27
申请人： Aimin Sang , Xiaodong Wang , Mohammad Madihian
发明人： Aimin Sang , Xiaodong Wang , Mohammad Madihian
IPC分类号： G06F15/173
CPC分类号： H04L12/66
摘要： A base station design for a wireless communication system is disclosed with a hierarchical scheduler for packet data services which is advantageously both traffic-aware and channel-dependent in a manner which enhances the users' perception of network performance. In one embodiment, a cross-layer hierarchical scheduler is disclosed which further comprises an intra-user scheduler and an inter-user scheduler.
摘要翻译：公开了一种用于无线通信系统的基站设计，其具有用于分组数据服务的分层调度器，其有利地以增强用户对网络性能的感知的方式来对业务感知和信道相关。在一个实施例中，公开了一种跨层分层调度器，其进一步包括用户内调度器和用户间调度器。

67. 发明授权

US08098631B2 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，并且没有用于蜂窝下行链路上的接收的预定解码顺序
公开(公告)号：US08098631B2
公开(公告)日：2012-01-17
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： H04W4/00
CPC分类号： H04W88/06 , H04W4/06 , H04W24/00 , H04W84/042
摘要： The invention is a method directed to group MMSE-DFD with rate (SINR) feedback and without pre-determined decoding order for reception on a cellular downlink. The method includes initializing channel matrix estimates and inner codes of all co-channel transmitter sources in a wireless network. Each channel matrix estimate is converted into an effective channel matrix responsive to the inner code of the corresponding transmitter source; The channel estimates or the inner codes or the modulation and coding schemes are not known for some of the transmitter sources whose transmitted signals are consequently treated as interference and deemed un-decodable.
摘要翻译：本发明是一种针对具有速率（SINR）反馈的组MMSE-DFD并且在蜂窝下行链路上没有用于接收的预定解码顺序的方法。该方法包括在无线网络中初始化信道矩阵估计和所有同信道发射机源的内部码。响应于相应的发射机源的内部码，每个信道矩阵估计被转换成有效的信道矩阵; 信道估计或内码或调制和编码方案对于其发射信号因此被视为干扰并被认为是不可解码的一些发射机源是未知的。

68. 发明授权

US08023581B2 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机
公开(公告)号：US08023581B2
公开(公告)日：2011-09-20
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 , H04L27/06
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。

69. 发明授权

US07929478B2 Optimal resource allocation in a multi-hop OFDMA wireless network with cooperative relaying 有权
标题翻译：具有协同中继的多跳OFDMA无线网络中的最优资源分配
公开(公告)号：US07929478B2
公开(公告)日：2011-04-19
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
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。

70. 发明授权

US07889808B2 Interpolation based QR decomposition for MIMO-OFDM systems using D-SMC Demodulator with per chunk ordering 有权
标题翻译：基于插值的QR分解，用于使用每个块顺序的D-SMC解调器的MIMO-OFDM系统
公开(公告)号：US07889808B2
公开(公告)日：2011-02-15
申请号：US11857251
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： H04L1/02
CPC分类号： H04L1/0631 , H04L5/023 , H04L25/0232 , H04L27/2649
摘要： In accordance with the invention, a method includes determining either the number of tones per chunk required to compute per-chunk order responsive to a sub-band bandwidth, a coherence bandwidth and number of chunks, or the number of chunks responsive to a sub-band bandwidth and a coherence bandwidth; determining an order for each chunk; and determining, for each chunk, QR decompositions for all its tones according to the determined order.
摘要翻译：根据本发明，一种方法包括：响应于子带带宽，相干带宽和块数量，或响应于子带宽的块的数量来确定每个块所需的每个块所需的每个块的个数，带宽和相干带宽; 确定每个块的顺序; 并且根据确定的顺序为每个块确定其所有音调的QR分解。

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