公开(公告)号：US08559540B2

公开(公告)日：2013-10-15

申请号：US12904622

申请日：2010-10-14

申请人： Yang Sun ,  Joseph R. Cavallaro ,  Jorma Lilleberg

发明人： Yang Sun ,  Joseph R. Cavallaro ,  Jorma Lilleberg

IPC分类号： H04L5/12 ,  H04L27/06 ,  H03M13/03

CPC分类号： H03M13/6525 ,  H03M13/1102 ,  H03M13/3905 ,  H04L1/06 ,  H04L25/03216 ,  H04L25/03891

摘要： An apparatus for trellis-based detection in a communication system including a processor and memory having computer program code configured to construct a trellis representing a transmitted signal formed from a plurality of symbols, each having a constellation size, transmitted by a number of transmit antennas, and form a log likelihood ratio at nodes of the trellis as a log-sum of a number of exponential terms corresponding to a hypothesized transmitted bit value of the plurality of symbols. The number of exponential terms is limited by a number of most likely paths of the trellis extending from each node of the trellis and the constellation size. The processor and memory including computer program code are further configured to form a list at each node of the trellis of a size limited to the number of the most likely paths of the trellis extending from each node of the trellis.

摘要翻译： 一种用于包括处理器和存储器的通信系统中的基于网格检测的装置，所述计算机程序代码被配置为构造表示从多个符号形成的发送信号的网格，所述多个符号具有由多个发送天线发送的星座大小， 并且在网格的节点处形成对数似然比，作为对应于多个符号的假设的发送比特值的指数项的数量的对数和。 指数项的数量受到从网格的每个节点和星座大小延伸的网格的最可能路径的数量的限制。 包括计算机程序代码的处理器和存储器还被配置为在格架的每个节点处形成列表，其大小限于从网格的每个节点延伸的网格的最可能路径的数量。

公开(公告)号：US08477862B2

公开(公告)日：2013-07-02

申请号：US12959007

申请日：2010-12-02

申请人： Yang Sun ,  Joseph R. Cavallaro ,  Jorma Lilleberg

发明人： Yang Sun ,  Joseph R. Cavallaro ,  Jorma Lilleberg

IPC分类号： H04L5/12

CPC分类号： H04L25/03216 ,  H04B7/0413 ,  H04L1/005 ,  H04L1/0055 ,  H04L25/03171 ,  H04L2025/03426

摘要： An apparatus for trellis-based detection in a communication system including a processor and memory having computer program code configured to construct a trellis representing a transmitted signal formed from a plurality of symbols, each having a constellation size, transmitted by a number of transmit antennas, and form a log likelihood ratio at nodes of the trellis as a log-sum of a number of exponential terms including a priori information corresponding to a hypothesized transmitted bit value of the plurality of symbols. The number of exponential terms is limited by a number of most likely paths of the trellis extending from each node of the trellis and the constellation size. The processor and memory including computer program code are configured to form a list at each node of the trellis of a size limited to the number of the most likely paths of the trellis extending from each node.

摘要翻译： 一种用于包括处理器和存储器的通信系统中的基于网格检测的装置，所述计算机程序代码被配置为构造表示从多个符号形成的发送信号的网格，所述多个符号具有由多个发送天线发送的星座大小， 并且在网格的节点处形成对数似然比，作为包括与多个符号的假定的发送比特值相对应的先验信息的指数项的数量的对数和。 指数项的数量受到从网格的每个节点和星座大小延伸的网格的最可能路径的数量的限制。 包括计算机程序代码的处理器和存储器被配置为在格局的每个节点处形成列表，其大小限于从每个节点延伸的网格的最可能路径的数量。

公开(公告)号：US20120093249A1

公开(公告)日：2012-04-19

申请号：US12959007

申请日：2010-12-02

申请人： Yang Sun ,  Joseph R. Cavallaro ,  Jorma Lilleberg

发明人： Yang Sun ,  Joseph R. Cavallaro ,  Jorma Lilleberg

IPC分类号： H04L23/02

CPC分类号： H04L25/03216 ,  H04B7/0413 ,  H04L1/005 ,  H04L1/0055 ,  H04L25/03171 ,  H04L2025/03426

摘要： An apparatus for trellis-based detection in a communication system including a processor and memory having computer program code configured to construct a trellis representing a transmitted signal formed from a plurality of symbols, each having a constellation size, transmitted by a number of transmit antennas, and form a log likelihood ratio at nodes of the trellis as a log-sum of a number of exponential terms including a priori information corresponding to a hypothesized transmitted bit value of the plurality of symbols. The number of exponential terms is limited by a number of most likely paths of the trellis extending from each node of the trellis and the constellation size. The processor and memory including computer program code are configured to form a list at each node of the trellis of a size limited to the number of the most likely paths of the trellis extending from each node.

摘要翻译： 一种用于包括处理器和存储器的通信系统中的基于网格检测的装置，所述计算机程序代码被配置为构造表示从多个符号形成的发送信号的网格，所述多个符号具有由多个发送天线发送的星座大小， 并且在网格的节点处形成对数似然比，作为包括与多个符号的假定的发送比特值相对应的先验信息的指数项的数量的对数和。 指数项的数量受到从网格的每个节点和星座大小延伸的网格的最可能路径的数量的限制。 包括计算机程序代码的处理器和存储器被配置为在格局的每个节点处形成列表，其大小限于从每个节点延伸的网格的最可能路径的数量。

公开(公告)号：US20110044379A1

公开(公告)日：2011-02-24

申请号：US12918996

申请日：2008-02-21

申请人： Jorma Lilleberg ,  Ting Zhou ,  Fang Wang

发明人： Jorma Lilleberg ,  Ting Zhou ,  Fang Wang

IPC分类号： H04B7/17

CPC分类号： H04L1/1845 ,  H04B7/15592 ,  H04L1/0055 ,  H04L1/1812 ,  H04L2001/0097

摘要： An approach is provided for relaying signals. A signal is received over a communication link and demodulated. Soft symbols are estimated based on probability information corresponding to the demodulated signal. The demodulated signal is remodulated based on the soft symbols. A relay signal is output based on the remodulated signal.

摘要翻译： 提供了一种用于中继信号的方法。 通过通信链路接收信号并进行解调。 基于对应于解调信号的概率信息来估计软符号。 基于软符号重新调制解调信号。 基于再调制信号输出继电器信号。

公开(公告)号：US20080162902A1

公开(公告)日：2008-07-03

申请号：US11706821

申请日：2007-02-12

申请人： Wei Li ,  Haifeng Wang ,  Jorma Lilleberg ,  Ming Chen ,  Shixin Cheng

发明人： Wei Li ,  Haifeng Wang ,  Jorma Lilleberg ,  Ming Chen ,  Shixin Cheng

IPC分类号： G06F9/00

CPC分类号： H04L25/03216 ,  H04L2025/03426

摘要： A QRD-M decomposition includes a first and a sequential second stage, at least. In the first stage, M branches are selected from among more than M branches entering the first stage as survive branches from which multiple decompositions are calculated. In the second stage, more than M branches are selected from among those branches entering the second stage as survive branches from which multiple decompositions are calculated. The symbol of the received signal is decided from a branch that is a survive branch of both the first and second stages. The second stage may be within a window that may include additional stages at which the pruning decision down to M survive branches is delayed. One or more windows may be used in a single QRD-M decomposition. In an embodiment, all branches entering the second stage are survive branches. It is shown that the marginal increased computational load increases accuracy.

摘要翻译： QRD-M分解至少包括第一和第二阶段。 在第一阶段，从分支进入第一阶段的M个分支中选出M个分支作为计算多个分解的生存分支。 在第二阶段，从进入第二阶段的那些分支中选出超过M个分支作为计算多重分解的生存分支。 接收信号的符号由作为第一和第二级的存活分支的分支决定。 第二阶段可能在一个窗口内，可能包括另外一个阶段，在此阶段，由M延续出来的剪枝决定被延迟。 单个QRD-M分解中可以使用一个或多个窗口。 在一个实施例中，进入第二阶段的所有分支都是能够分支的。 显示边际增加的计算负载提高了精度。

公开(公告)号：US07394865B2

公开(公告)日：2008-07-01

申请号：US10607406

申请日：2003-06-25

申请人： Mohammad Jaber Borran ,  Prabodh Varshney ,  Jorma Lilleberg

发明人： Mohammad Jaber Borran ,  Prabodh Varshney ,  Jorma Lilleberg

IPC分类号： H04L27/00

CPC分类号： H04L5/0007 ,  H04L5/0021 ,  H04L5/0048 ,  H04L25/022 ,  H04L25/0226 ,  H04L27/0008 ,  H04L27/3405 ,  H04L27/3455

摘要： A signal constellation for wireline or wireless multi-carrier communication systems, such as systems using OFDM or MC-CDMA, has points separated from one another by maximizing a distance between conditional probability distributions, such as a Kullbeck-Leibler (KL) distance. Preferably, the constellation points are arranged in concentric circles, with or without a point at the origin, wherein adjacent circles are rotated to maximize an angular distance between points on adjacent circles. Pilot symbols inserted in the transmitted signal are used by a receiver to estimate the channel of the multi-carrier system. Different constellations show optimum performance for different signal to noise ratios, and for different numbers of taps used to estimate the channel, especially in a fast fading environment where there may be fewer pilots per OFDM or MC-CDMA symbol than channel taps.

摘要翻译： 用于有线或无线多载波通信系统的信号星座（例如使用OFDM或MC-CDMA的系统）通过使条件概率分布（例如Kullbeck-Leibler（KL））距离之间的距离最大化而具有彼此分离的点。 优选地，星座点以同心圆排列，具有或不具有原点的点，其中相邻的圆圈被旋转以最大化相邻圆上的点之间的角距离。 接收机使用插入发送信号的导频符号来估计多载波系统的信道。 不同的星座显示不同信噪比的最佳性能，以及用于估计信道的不同数量的抽头，特别是在每个OFDM或MC-CDMA符号比通道抽头可能具有较少导频的快衰落环境中。

公开(公告)号：US07088699B1

公开(公告)日：2006-08-08

申请号：US09445808

申请日：1998-06-23

申请人： Ari Hottinen ,  Jorma Lilleberg ,  Antti Toskala ,  Harri Holma

发明人： Ari Hottinen ,  Jorma Lilleberg ,  Antti Toskala ,  Harri Holma

IPC分类号： H04B1/707 ,  H04B7/216

CPC分类号： H04B1/7105 ,  H04B1/712

摘要： The invention relates to a reception method and a receiver in a system comprising in each cell a base station communicating with terminals located in its area. A received signal comprises a sum signal of signals originating from several transmitters. The receiver comprises means for performing interference elimination and a simultaneous multi-user detection to the signal and means for searching signal parameters. In order to reduce the required computational capacity, the receiver further comprises means for removing the effect of the signals of the known users from the receives sum signal, and means for estimating the parameters of the unknown signals from a narrowband residual signal.

摘要翻译： 本发明涉及一种系统中的接收方法和接收机，包括在每个小区中与与其区域中的终端进行通信的基站。 接收到的信号包括源自多个发射机的信号的和信号。 该接收机包括用于执行干扰消除和对信号的同时多用户检测的装置和用于搜索信号参数的装置。 为了减少所需的计算容量，接收机还包括用于从接收和信号中去除已知用户的信号的影响的装置，以及用于从窄带残差信号估计未知信号的参数的装置。

公开(公告)号：US06947403B2

公开(公告)日：2005-09-20

申请号：US10607670

申请日：2003-06-27

申请人： Markku J. Heikkila ,  Jorma Lilleberg

发明人： Markku J. Heikkila ,  Jorma Lilleberg

IPC分类号： H04B1/707 ,  H04B7/08 ,  H04B7/216

CPC分类号： H04B7/0894 ,  H04B1/7097 ,  H04B1/7115 ,  H04B7/0854

摘要： A CDMA receiver (10) includes a receiver input for coupling to signal outputs of Nrx receive antennas (20A,20B), where the signal outputs are sampled at Ns samples per symbol or chip, a matched filter (14), such as a RAKE, and a whitening filter (20) for coupling the receiver input to an input of the matched filter. The whitening filter contains NsNrx parallel whitening filters wj,k (22A-22D), individual ones of the whitening filters wj,k receiving during each symbol interval i, NsNrx new signal samples via a signal connection matrix (28) such that a first individual whitening filter receives only one of the new samples, a second individual whitening filter receives the same sample as the first individual whitening filter, and one additional sample, and such that an nth individual whitening filter receives the same n−1 samples as the first n−1 individual whitening filters, plus one of the remaining samples. The whitening filter has Nrx outputs for outputting filtered signal samples such that a filtered signal sample appearing in the Nrx outputs does not correlate with any other filtered signal sample appearing in Nrx outputs. The whitening filter also includes a delay line (30) constructed as a plurality of serially coupled delay line elements each having a delay of one symbol interval. The delay line has an input coupled to an output of said signal connection matrix and provides the NsNrx parallel whitening filters wj,k with delayed versions of the signal samples.

摘要翻译： CDMA接收机（10）包括用于耦合到信号输出的接收器输入端（20A，20B），其中信号输出在N S＆lt; / SUB 每个符号或芯片的采样，诸如RAKE的匹配滤波器（14）和用于将接收机输入耦合到匹配滤波器的输入的白化滤波器（20）。 白化过滤器包含N＆lt; N＆gt; rx＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;＆lt;＆lt; 在每个符号间隔i期间接收到的新信号通过信号连接矩阵（28）采样，使得N 第一单独的白化滤光器只接收一个新的样品，第二个单独的白化滤光器接收与第一单独的白化滤光片相同的样品和一个另外的样品，并且使得第n个单独的白化滤光片接收相同的n-1样品， 第一个n-1个单独的白化过滤器，加上其余的样品之一。 白化滤波器具有用于输出滤波的信号样本的N个输出，使得出现在N个输出中的滤波信号样本与出现在N中的任何其它滤波信号样本不相关 _{rx 输出。 白化滤波器还包括构成为具有一个符号间隔的延迟的多个串联的延迟线元件的延迟线（30）。 延迟线具有耦合到所述信号连接矩阵的输出的输入，并且提供N N个N×N个并行白化滤波器w j，k， 具有延迟版本的信号样本。}

公开(公告)号：US20050094740A1

公开(公告)日：2005-05-05

申请号：US10699386

申请日：2003-10-31

申请人： Mohammad Borran ,  Prabodh Varshney ,  Jorma Lilleberg

发明人： Mohammad Borran ,  Prabodh Varshney ,  Jorma Lilleberg

IPC分类号： H04K1/10 ,  H04L20060101

CPC分类号： H04L27/34 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0656

摘要： A multi-level space time signal constellation that is optimized for use with a multi-carrier, multi-path communication scheme includes points on a first level separated from points on a mutually exclusive second level by a minimum distance that is based on a conditional probability distribution, preferably a Kullback-Leibler (KL) distance. Points within one level may be separated by a Euclidean distance, but spherical levels are rotated relative to one another to maximize a minimum inter-level KL distance. A receiver uses pilot symbols to estimate the channels and two-stage symbol detection, determining in one stage the constellation level and in another stage the point in the level. The receiver calculates a likelihood function based on a conditional distribution which does not reduce to the Euclidean-based nearest-neighbor detector. A single stored constellation may be scaled based on received signal to noise ratio. Each constellation defines n=2M real dimensions, wherein M is the number of transmit antennas.

摘要翻译： 优化用于多载波多路径通信方案的多级时空信号星座包括在相互排斥的第二级别上的点之间的第一级上的点与基于条件概率的最小距离的点 分布，最好是Kullback-Leibler（KL）距离。 一个级别内的点可以通过欧几里德距离分开，但是球面水平相对于彼此旋转以使最小跨越距离KL距离最大化。 接收机使用导频符号来估计信道和两级符号检测，在一个阶段中确定星座级别，在另一级中确定该级别中的点。 接收机基于不减少到基于欧几里德的最近邻检测器的条件分布来计算似然函数。 可以基于接收到的信噪比来缩放单个存储的星座。 每个星座定义n = 2M个实际维度，其中M是发射天线的数量。

公开(公告)号：US06847689B1

公开(公告)日：2005-01-25

申请号：US09619905

申请日：2000-07-19

申请人： Olli Vuorinen ,  Tapio Seppänen ,  Juha Röning ,  Jorma Lilleberg ,  Timo Kolehmainen

发明人： Olli Vuorinen ,  Tapio Seppänen ,  Juha Röning ,  Jorma Lilleberg ,  Timo Kolehmainen

IPC分类号： G10L21/0272 ,  H04B3/32 ,  H04B7/005 ,  H04B15/00 ,  H04L25/03 ,  H04B1/10

CPC分类号： G10L21/0272 ,  H04B15/005

摘要： The invention relates to a method and a filter for distinguishing signal components from one another, whereof at least one comprises a periodic signal sequence. In the solution samples are taken during several signal sequences (300) and a signal sequence model is formed by arranging the samples taken from several signal sequences (300) together so that the samples represent a single signal sequence (300) model and the signal sequence model is specified by filtering.

摘要翻译： 本发明涉及用于将信号分量彼此区分开的方法和滤波器，其中至少一个包括周期信号序列。 在解决方案中，在几个信号序列（300）期间采集样本，并且通过将从几个信号序列（300）获取的样本排列在一起而形成信号序列模型，使得样本表示单个信号序列（300）模型，信号序列 模型通过过滤指定。