公开(公告)号：US20090225720A1

公开(公告)日：2009-09-10

申请号：US12358619

申请日：2009-01-23

申请人： Andreas F. Molisch ,  Zhifeng Tao ,  Philip V. Orlik ,  Jinyun Zhang ,  Lun Dong ,  Lingjia Liu ,  Toshiyuki Kuze

发明人： Andreas F. Molisch ,  Zhifeng Tao ,  Philip V. Orlik ,  Jinyun Zhang ,  Lun Dong ,  Lingjia Liu ,  Toshiyuki Kuze

IPC分类号： H04W72/00 ,  H04L27/28

CPC分类号： H04L25/0226 ,  H04B7/022 ,  H04B7/0495

摘要： A method estimates channels in a wireless cooperative cellular network including a set of base stations, and each base station communicates cooperatively with a set of mobile stations. A first sounding signal including a first midamble is transmitted from a first base station to a first mobile station. A second sounding signal including a second midamble is transmitted simultaneously from a second base station to the first mobile station, wherein the first and second midamble are disjoint in time, and wherein the first and second midambles are used to estimate the channels between the first base station and the first mobile station, and the second base station and the first mobile station, respectively.

摘要翻译： 一种方法估计包括一组基站的无线协作蜂窝网络中的信道，并且每个基站与一组移动台协作通信。 包括第一中间码的第一探测信号从第一基站发射到第一移动站。 包括第二中间码的第二探测信号从第二基站同时发送到第一移动站，其中第一和第二中间码在时间上是不相交的，并且其中第一和第二中间码被用于估计第一基站 站和第一移动站，第二基站和第一移动站。

公开(公告)号：US20090180568A1

公开(公告)日：2009-07-16

申请号：US12239491

申请日：2008-09-26

申请人： Philip V. Orlik ,  Wataru Matsumoto ,  Andreas F. Molisch ,  Zhifeng Tao ,  Jinyun Zhang

发明人： Philip V. Orlik ,  Wataru Matsumoto ,  Andreas F. Molisch ,  Zhifeng Tao ,  Jinyun Zhang

IPC分类号： H04B7/02

CPC分类号： H04L1/0606 ,  H04L1/0662 ,  H04L1/1816

摘要： A method transmits a block of symbols in a multiple-input multiple-output (MIMO) network including a transmitter having a set of transmit antennas and a receiver having a set of receive antennas. A block of symbols is coded with a first code to generate a first block, which is transmitted and received. If a decoding of the first block is incorrect, then block of symbols is coded with the first code and then a second code different than the first code to generate a second block. The second block is transmitted, received and combined with the first block to recover the block of symbols.

摘要翻译： 一种方法在包括具有一组发射天线的发射机和具有一组接收天线的接收机的多输入多输出（MIMO）网络中发送符号块。 用第一代码编码符号块以产生被发送和接收的第一块。 如果第一块的解码不正确，则使用第一代码然后与第一代码不同的第二代码对符号块进行编码以生成第二块。 第二块被发送，接收并与第一块组合以恢复符号块。

公开(公告)号：US20090147728A1

公开(公告)日：2009-06-11

申请号：US11950699

申请日：2007-12-05

申请人： George K. Atia ,  Andreas F. Molisch

发明人： George K. Atia ,  Andreas F. Molisch

IPC分类号： H04B7/212 ,  H04B7/185

CPC分类号： H04B7/0617 ,  H04B7/0632 ,  H04B7/15592 ,  H04L1/0002 ,  H04L2001/0097 ,  H04W48/16 ,  H04W88/04

摘要： A method, system and network transmit data from a base station, via relay stations, to user stations. Imperfect channel state information (CSI) for downlink channels from the base station and the relay stations to the user stations is acquired. For each candidate transmission strategy of a set of candidate transmission strategies, a corresponding beamforming matrix is determined according the imperfect CSI. For each beamforming matrix, a bound on an expected target benefit function is determined, and a particular one of the bounds is selected. The data are then transmitted from the base station, via the relay stations, to the user stations according to the beamforming matrix associated and the candidate strategy associated with the selected bound.

摘要翻译： 方法，系统和网络从基站通过中继站向用户站发送数据。 获取从基站和中继站到用户站的下行链路信道的不完善信道状态信息（CSI）。 对于一组候选传输策略的每个候选传输策略，根据不完整的CSI确定相应的波束形成矩阵。 对于每个波束形成矩阵，确定预期目标有益功能的界限，并且选择特定的边界。 然后，根据与所选择的边界相关联的波束形成矩阵和候选策略，将数据从基站经由中继站发送到用户站。

公开(公告)号：US07496153B2

公开(公告)日：2009-02-24

申请号：US10964918

申请日：2004-10-14

申请人： Philip Orlik ,  Andreas F. Molisch ,  Sandeep Aedudodla

发明人： Philip Orlik ,  Andreas F. Molisch ,  Sandeep Aedudodla

IPC分类号： H04B1/00

CPC分类号： H04B1/7176 ,  H04B1/719 ,  H04L27/18

摘要： A system incorporates time-hopped and transmitted-reference transceivers in the same wireless network. A transmitter modulates a sequence of bits in a wireless communications network by generating a reference waveform and a data waveform of a waveform pair for each current bit. The phase of the reference waveform depends on a previous modulated bit, and a difference in phase between the reference waveform and the data waveform pair depend on the current bit.

摘要翻译： 系统在相同的无线网络中集成了跳时和发射参考收发器。 发射机通过为每个当前比特生成参考波形和波形对的数据波形来调制无线通信网络中的比特序列。 参考波形的相位取决于先前的调制位，参考波形和数据波形对之间的相位差取决于当前位。

公开(公告)号：US20080247442A1

公开(公告)日：2008-10-09

申请号：US11995996

申请日：2005-07-18

申请人： Philip V. Orlik ,  Andreas F. Molisch ,  Shiwei Zhao

发明人： Philip V. Orlik ,  Andreas F. Molisch ,  Shiwei Zhao

IPC分类号： H04B1/69

CPC分类号： H04L1/006 ,  H04B1/7172 ,  H04L1/005

摘要： A method, apparatus, and system for modulating and demodulating signals compatible with multiple receiver types and designed for improved receiver performance. The invention includes the use of hybrid impulse radio (H-IR) ultra-wideband (UWB) with forward error correction coding, recursive modulation and other techniques designed to enable one transmitter to transmit a waveform capable of being demodulated concurrently by a coherent receiver, a differentially coherent receiver, and/or a non-coherent receiver.

摘要翻译： 一种用于调制和解调与多种接收机类型兼容的信号并被设计用于改善接收机性能的方法，装置和系统。 本发明包括使用具有前向纠错编码，递归调制和其他技术的混合脉冲无线电（H-IR）超宽带（UWB），其被设计成使一个发射机能够通过相干接收机同时发送能够被解调的波形， 差分相干接收机和/或非相干接收机。

公开(公告)号：US07391802B2

公开(公告)日：2008-06-24

申请号：US11074168

申请日：2005-03-07

申请人： Philip Orlik ,  Andreas F. Molisch ,  Shiwei Zhao

发明人： Philip Orlik ,  Andreas F. Molisch ,  Shiwei Zhao

IPC分类号： H04B1/00

CPC分类号： H04B1/7176 ,  H04B1/71635 ,  H04B1/719 ,  H04B2001/6908 ,  H04L27/18 ,  H04L27/2071 ,  H04L27/2331

摘要： A system incorporates time-hopped impulse radio (TH-IR) and transmitted-reference impulse radio (TR-IR) transceivers in the same wireless network. A transmitter modulates a sequence of bits in a wireless communications network by generating a reference waveform and a data waveform of a waveform pair for each current bit. The phase of the reference waveform depends on a previous modulated bit, and a difference in phase between the reference waveform and the data waveform pair depend on the current bit. A symbol period for the current bit is partitioned into multiple time intervals, and the reference waveform and the data waveform are encoded in a selected one of the time intervals that depends on the current bit.

摘要翻译： 系统在同一无线网络中集成了时间跳跃脉冲无线电（TH-IR）和发射参考脉冲无线电（TR-IR）收发器。 发射机通过为每个当前比特生成参考波形和波形对的数据波形来调制无线通信网络中的比特序列。 参考波形的相位取决于先前的调制位，参考波形和数据波形对之间的相位差取决于当前位。 当前位的符号周期被划分成多个时间间隔，并且参考波形和数据波形被编码在取决于当前位的时间间隔中的所选择的一个中。

公开(公告)号：US07388927B2

公开(公告)日：2008-06-17

申请号：US11079362

申请日：2005-03-14

申请人： Philip Orlik ,  Andreas F. Molisch

发明人： Philip Orlik ,  Andreas F. Molisch

IPC分类号： H04L27/00

CPC分类号： H04B1/71635 ,  H04B1/71632 ,  H04B1/71637 ,  H04B1/7176

摘要： A system incorporates time-hopped impulse-radio (TH-IR), transmitted-reference impulse-radio (TR-IR) and noncoherent transceivers in the same wireless network. A transmitter modulates a sequence of bits in a wireless communications network by selecting one coding sequence from a set of orthogonal or quasi-orthogonal coding sequences based on a current subsequence of bits of the input sequence, generating a reference waveform and a data waveform of a waveform pair for each sequence.

摘要翻译： 系统在同一无线网络中集成了跳时脉冲无线电（TH-IR），发射参考脉冲无线电（TR-IR）和非相干收发器。 发射机通过基于输入序列的比特的当前子序列从一组正交或准正交编码序列中选择一个编码序列来调制无线通信网络中的比特序列，生成参考波形和数据波形 每个序列的波形对。

公开(公告)号：US07376173B2

公开(公告)日：2008-05-20

申请号：US10950772

申请日：2004-09-27

申请人： Jonathan S. Yedidia ,  Andreas F. Molisch ,  Karunakar Pedagani

发明人： Jonathan S. Yedidia ,  Andreas F. Molisch ,  Karunakar Pedagani

IPC分类号： H04B1/00

CPC分类号： H04L5/0026 ,  H04L25/067 ,  H04L27/0008 ,  H04L27/2035 ,  H04L27/206

摘要： A method encodes a sequence of blocks of input bits to be transmitted over a wireless channel. Each block of input bits is converted to a codeword, and each codeword is mapped to multiple sub-blocks of complex numbers. Each sub-block is multiplied by a disambiguating spreading transform to obtain a sub-block of transformed symbols, which can be modulated and transmitted to a receiver, where each received block is demodulated to a block of complex numbers, which are partitioned into sub-blocks. The sub-block of complex numbers are converted to a set of likelihood ratios that correspond to decoded codewords. The input bits can be decoded unambiguously even if only one of the blocks of symbols corresponding to the block of input bits is received correctly.

摘要翻译： 一种方法编码将通过无线信道发送的输入比特块序列。 每个输入比特块被转换成码字，并将每个码字映射到复数的多个子块。 将每个子块乘以去歧义扩展变换，以获得可以被调制并发送到接收机的变换符号的子块，其中每个接收块被解调成一个复数块， 块。 复数子块被转换成对应于解码码字的似然比集合。 即使只有一个对应于输入比特块的符号块中的一个被正确地接收，输入比特可被明确地解码。

公开(公告)号：US07359470B2

公开(公告)日：2008-04-15

申请号：US10939284

申请日：2004-09-10

申请人： Andreas F. Molisch ,  Jianxuan Du ,  Ye Li ,  Daqing Gu ,  Jinyun Zhang

发明人： Andreas F. Molisch ,  Jianxuan Du ,  Ye Li ,  Daqing Gu ,  Jinyun Zhang

IPC分类号： H04L7/02

CPC分类号： H04L1/0687

摘要： A method minimizes a rate for feeding back channel state information from a receiver to a transmitter in a multi-input, multi-output communications systems. A temporal autocorrelation function of the channel between the transmitter and the receiver is determined. A spatial covariance information is estimated of the channel. Then, the minimum rate for feeding back channel state information from the receiver to the transmitter is based on actual channel state information and the estimated spatial covariance information and the temporal autocorrelation function.

摘要翻译： 一种方法使在多输入多输出通信系统中将信道状态信息从接收机反馈到发射机的速率最小化。 确定发射机和接收机之间的信道的时间自相关函数。 估计通道的空间协方差信息。 然后，从接收机向发射机反馈信道状态信息的最小速率基于实际信道状态信息和估计的空间协方差信息和时间自相关函数。

公开(公告)号：US07355959B2

公开(公告)日：2008-04-08

申请号：US10856708

申请日：2004-05-28

申请人： Andreas F. Molisch ,  Ye Li ,  Jinyun Zhang

发明人： Andreas F. Molisch ,  Ye Li ,  Jinyun Zhang

IPC分类号： H04J11/00

CPC分类号： H04B1/719 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/261

摘要： A method suppresses interference in a time-frequency hopped, ultra wide bandwidth system. Signals corresponding to a transmitted symbol are received. The received signals are frequency demodulated, and a coefficient vector w that minimizes a cost function C ⁡ ( w n ) = 1 ∑ k ⁢ λ  n - k  ⁢ ∑ k ⁢ λ  n - k  ⁢ ⁢  w n H ⁢ x k - c k  2 , is estimated, where λ is a weighting factor between 0, x is a vector representing the received signals, H is a frequency response of a channel used to transmit the symbol, and c is a known training symbol. A coefficient vector, ŵn={circumflex over (R)}n−1{circumflex over (d)}n, is determined, where a correlation matrix for the received signals is R ^ n = 1 ∑ k ⁢ λ  n - k  ⁢ ∑ k ⁢ λ  n - k  ⁢ ⁢ x k ⁢ x k H , and an estimate of a crosscorrelation is d ^ n = 1 ∑ k ⁢ λ  n - k  ⁢ ∑ k ⁢ λ  n - k  ⁢ ⁢ x k ⁢ c k * . The received signals are then combined according to c ^ n = 1 C ⁡ ( w ^ n ) ⁢ w ^ n H ⁢ x n = 1 1 - w ^ n H ⁢ ⁢ d ^ n ⁢ w ^ n H ⁢ x n .