专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06377632B1 Wireless communication system and method using stochastic space-time/frequency division multiplexing 失效
标题翻译：使用随机时空/频分复用的无线通信系统和方法
公开(公告)号：US06377632B1
公开(公告)日：2002-04-23
申请号：US09490698
申请日：2000-01-24
申请人： Arogyaswami J. Paulraj , Peroor K. Sebastian , Jose Tellado , Robert W. Heath, Jr. , Shilpa Talwar , Helmut Bölcskei
发明人： Arogyaswami J. Paulraj , Peroor K. Sebastian , Jose Tellado , Robert W. Heath, Jr. , Shilpa Talwar , Helmut Bölcskei
IPC分类号： H04B706
CPC分类号： H04B7/0669 , H04B7/0671 , H04L1/0606 , H04L1/0625 , H04L5/0023
摘要： A method and apparatus for wireless transmission of a digital bit stream. The present method employs diversity techniques to minimize multipath fading. Digital bits are converted into symbols and the symbols are provided to a number of diversity branches. Each diversity branch has its own antenna. The symbols sent to each diversity branch may be multiplied by a different phase factor or amplitude factor. The phase factors and amplitude factors may be randomly selected. Also, wireless channels can be monitored for channel quality. In this case, the channel quality measurements are used to select the phase factors and the amplitude factors. Also, the symbols can be grouped into frames before transmission. In this case, the frames can be multiplied by matrices comprising phase factors and amplitude factors. Also in this case, the frames can undergo cyclic shifting, which provides an additional measure of diversity.
摘要翻译：一种用于数字比特流的无线传输的方法和装置。本方法采用分集技术来最小化多路径衰落。数字位被转换为符号，符号被提供给多个分集分支。每个分集分支都有自己的天线。发送到每个分集支路的符号可以乘以不同的相位因子或振幅因子。可以随机选择相位因子和振幅因子。此外，可以监控无线信道的信道质量。在这种情况下，通道质量测量用于选择相位因子和振幅因子。此外，符号可以在传输之前被分组成帧。在这种情况下，帧可以乘以包括相位因子和幅度因子的矩阵。同样在这种情况下，帧可以经历循环移位，这提供了多样性的附加度量。

2. 发明授权

US07742536B2 Method for calculating functions of the channel matrices in linear MIMO-OFDM data transmission 失效
标题翻译：用于计算线性MIMO-OFDM数据传输中的信道矩阵的函数的方法
公开(公告)号：US07742536B2
公开(公告)日：2010-06-22
申请号：US11667281
申请日：2005-11-07
申请人： Andreas Burg , Helmut Bölcskei , Moritz Borgmann , Davide Cescato , Jan Hansen
发明人： Andreas Burg , Helmut Bölcskei , Moritz Borgmann , Davide Cescato , Jan Hansen
IPC分类号： H04K1/10
CPC分类号： H04B7/0854 , H04L25/0244 , H04L25/0246
摘要： The present application describes a method for transmitting data through a MIMO-OFDM system which requires the computation of a function f(H(sk)), where H is the channel matrix and sk=exp(j*2*pi*k/N). The method splits function f into a first, nonpolynomial part, which is in turn a function of one or more polynomial functions in sk.
摘要翻译：本申请描述了一种通过MIMO-OFDM系统发送数据的方法，其需要计算函数f（H（sk）），其中H是信道矩阵，并且sk = exp（j * 2 * pi * k / N ）。该方法将函数f分解为第一非多项式部分，其又是sk中的一个或多个多项式函数的函数。

3. 发明授权

US08116356B2 Linear transformation matrices for distributed diversity 有权
标题翻译：用于分布式多样性的线性变换矩阵
公开(公告)号：US08116356B2
公开(公告)日：2012-02-14
申请号：US12214634
申请日：2008-06-20
申请人： Cemal Akcaba , Patrick Kuppinger , Helmut Bölcskei , Ari Hottinen
发明人： Cemal Akcaba , Patrick Kuppinger , Helmut Bölcskei , Ari Hottinen
IPC分类号： H04B3/36
CPC分类号： H04B7/022
摘要： A signal for relay is received from a first node. From a local memory that stores K transform matrices (K being an integer greater than one) is selected a transform matrix that is associated with a relay rank order. The matrices define an optimal tradeoff of diversity gain versus spatial multiplexing. The received signal is transformed using the selected transform matrix, and the transformed signal is relayed over a wireless channel to a second node. In a particular embodiment the received signal is an input symbol vector of N consecutive symbols (N being an integer at least equal to two) and the transform linearly combines the N symbols of the input vector according to the relay rank order. In various embodiments the first node may give the rank order, it may be mutually agreed via signaling among the various relay nodes, or it may be based on an intrinsically generated random number.
摘要翻译：从第一节点接收用于中继的信号。从存储K个变换矩阵（K为大于1的整数）的本地存储器中选择与继电器等级顺序相关联的变换矩阵。矩阵定义了分集增益与空间复用的最佳权衡。使用所选择的变换矩阵来变换接收到的信号，并且将经变换的信号通过无线信道中继到第二节点。在特定实施例中，接收信号是N个连续符号（N是至少等于2的整数）的输入符号向量，并且该变换根据中继等级顺序线性组合输入向量的N个符号。在各种实施例中，第一节点可以给出秩次，它可以通过各种中继节点之间的信令相互协商，或者它可以基于固有的随机数。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式