公开(公告)号：US08879647B2

公开(公告)日：2014-11-04

申请号：US13456749

申请日：2012-04-26

申请人： Alexei Ashikhmin ,  Philip A. Whiting

发明人： Alexei Ashikhmin ,  Philip A. Whiting

IPC分类号： H04L27/28

CPC分类号： H04L1/0009 ,  H04L5/0046

摘要： At least one example embodiment discloses a method of controlling a system. The method includes determining a constant number of bits for each of a plurality of tones, each constant number of bits being constant, obtaining a single parameter from a user of the system, the single parameter being a code rate and transmitting, to the user, data as information bits in the plurality of tones across a channel based on the single parameter, each of the plurality of tones including the constant number of bits.

摘要翻译： 至少一个示例性实施例公开了一种控制系统的方法。 该方法包括确定多个音调中的每一个的常数比特数，每个常数比特是恒定的，从系统的用户获得单个参数，该单个参数是码率并向用户发送， 数据作为基于单个参数的信道中的多个音调中的信息比特，多个音调中的每一个包括常数比特数。

公开(公告)号：US20120201283A1

公开(公告)日：2012-08-09

申请号：US13021177

申请日：2011-02-04

申请人： Alexei Ashikhmin ,  Thomas Marzetta

发明人： Alexei Ashikhmin ,  Thomas Marzetta

IPC分类号： H04B17/00

CPC分类号： H04W52/24 ,  H04W52/143 ,  H04W52/241 ,  H04W52/243

摘要： Provided is a method and apparatus for allocating transmit power in a wireless network. The method includes determining powers at which a base station transmits downlink signals to each active user equipment associated with the base station such that each of the downlink signals is associated with a different active user and the base station is permitted to transmit downlink signals with different powers to the associated active user equipments. The method further includes transmitting the associated downlink signals, by the base station, to the active user equipments at the determined powers.

摘要翻译： 提供了一种用于在无线网络中分配发射功率的方法和装置。 该方法包括确定基站向与基站相关联的每个活动用户设备发送下行链路信号的功率，使得每个下行链路信号与不同的活动用户相关联，并且基站被允许发送具有不同功率的下行链路信号 到相关的活动用户设备。 所述方法还包括由所述基站以所确定的功率向相关用户设备发送相关联的下行链路信号。

公开(公告)号：US08140070B2

公开(公告)日：2012-03-20

申请号：US12320864

申请日：2009-02-06

申请人： Alexei Ashikhmin ,  Jubin Jose ,  Thomas Marzetta

发明人： Alexei Ashikhmin ,  Jubin Jose ,  Thomas Marzetta

IPC分类号： H04W24/00

CPC分类号： H04B7/0617 ,  H04B7/0434

摘要： Methods for suppressing inter-cell interference during data transmission using a preceding matrix are provided. Inter-cell interference is suppressed by precoding data (or information) signals for transmission from base station to mobile or vice versa. Methods according to example embodiments also increase intra-cell data transmission rates. The precoding matrix is generated based on estimated channel coefficients for propagation channels between a base station and mobiles inside and outside the base station's coverage area.

摘要翻译： 提供了使用前面的矩阵来抑制数据传输期间的小区间干扰的方法。 通过预编码数据（或信息）信号来抑制小区间干扰，用于从基站到移动的传输，反之亦然。 根据示例实施例的方法还增加小区内数据传输速率。 基于用于基站和基站覆盖区域内外的移动台之间的传播信道的估计信道系数来生成预编码矩阵。

公开(公告)号：US20110280162A1

公开(公告)日：2011-11-17

申请号：US12851728

申请日：2010-08-06

申请人： Alexei Ashikhmin ,  Thomas Louis Marzetta

发明人： Alexei Ashikhmin ,  Thomas Louis Marzetta

IPC分类号： H04J3/00

CPC分类号： H04B7/0617 ,  H04B7/0691 ,  H04B7/0825

摘要： A method is provided to reduce inter-cell interference in mobile wireless systems, and particularly in TDD wireless systems. In an embodiment, a base station receives a pilot signal from at least one of the mobile terminals that it serves at a plurality of base station antennas, which include both main antennas and auxiliary antennas. In response, each of the base station antennas provides an output that is processed to obtain a set of precoding weights for a transmission from the main antennas. The processing includes nulling at least one interfering signal using the outputs from at least the auxiliary antennas.

摘要翻译： 提供了一种减少移动无线系统中的小区间干扰的方法，特别是在TDD无线系统中。 在一个实施例中，基站从其包括主天线和辅助天线的多个基站天线处的至少一个移动终端接收导频信号。 作为响应，每个基站天线提供被处理以获得用于来自主天线的传输的一组预编码权重的输出。 该处理包括使用至少辅助天线的输出来使至少一个干扰信号归零。

公开(公告)号：US20110075617A1

公开(公告)日：2011-03-31

申请号：US12586823

申请日：2009-09-29

申请人： Alexei Ashikhmin ,  Thomas Louis Marzetta

发明人： Alexei Ashikhmin ,  Thomas Louis Marzetta

IPC分类号： H04W72/00

CPC分类号： H04L25/0226 ,  H04L25/03343 ,  H04L2025/03426

摘要： A construction is provided for uplink pilot signals in a cellular network. Three sets of pilot signals are defined, having orthogonality properties that lead to reduced inter-cell interference. In example embodiments, the network has a reuse factor of 3 for pilot signals, with sets U, V, and W of pilot signals assigned to cells in respective reuse classes. The pilots of each set form an orthogonal basis. Some pilots of each class, i.e. those which will generally be assigned to mobile stations near the cell edges, will also form an orthogonal basis with some pilots of each of the other classes.

摘要翻译： 为蜂窝网络中的上行链路导频信号提供了一种结构。 定义了三组导频信号，具有导致小区间干扰减小的正交性质。 在示例实施例中，网络对于导频信号具有3的重用因子，其中分配给相应重用类别中的小区的导频信号的集合U，V和W。 每组的导频形成正交基。 每个类别的一些导频，即通常被分配给小区边缘附近的移动台的那些导频，也将与每个其他类的一些导频形成正交基。

公开(公告)号：US20100203912A1

公开(公告)日：2010-08-12

申请号：US12320864

申请日：2009-02-06

申请人： Alexei Ashikhmin ,  Jubin Jose ,  Thomas Marzetta

发明人： Alexei Ashikhmin ,  Jubin Jose ,  Thomas Marzetta

IPC分类号： H04B7/00

CPC分类号： H04B7/0617 ,  H04B7/0434

摘要： Methods for suppressing inter-cell interference during data transmission using a preceding matrix are provided. Inter-cell interference is suppressed by precoding data (or information) signals for transmission from base station to mobile or vice versa. Methods according to example embodiments also increase intra-cell data transmission rates. The precoding matrix is generated based on estimated channel coefficients for propagation channels between a base station and mobiles inside and outside the base station's coverage area.

摘要翻译： 提供了使用前面的矩阵来抑制数据传输期间的小区间干扰的方法。 通过预编码数据（或信息）信号来抑制小区间干扰，用于从基站到移动的传输，反之亦然。 根据示例实施例的方法还增加小区内数据传输速率。 基于用于基站和基站覆盖区域内外的移动台之间的传播信道的估计信道系数来生成预编码矩阵。

公开(公告)号：US20100074356A1

公开(公告)日：2010-03-25

申请号：US12232737

申请日：2008-09-23

申请人： Alexei Ashikhmin

发明人： Alexei Ashikhmin

IPC分类号： H04B7/02

CPC分类号： H04L25/03343 ,  H04L25/0204 ,  H04L25/0212 ,  H04L2025/03426

摘要： Methods discussed herein provide more efficient precoding matrices for precoding signals prior to transmission. The methods discussed herein improve throughput in wireless MIMO systems. Methods discussed herein are applicable to frequency division duplexing (FDD) systems, time division duplexing (TDD) systems as well as other wireless communication systems.

摘要翻译： 本文讨论的方法为传输前的预编码信号提供了更有效的预编码矩阵。 本文讨论的方法提高无线MIMO系统中的吞吐量。 本文讨论的方法适用于频分双工（FDD）系统，时分双工（TDD）系统以及其他无线通信系统。

公开(公告)号：US07599444B2

公开(公告)日：2009-10-06

申请号：US11317140

申请日：2005-12-23

申请人： Alexei Ashikhmin

发明人： Alexei Ashikhmin

IPC分类号： H04B7/02 ,  H04L1/02

CPC分类号： H04L1/0612

摘要： A method of receiving information includes receiving a vector of signal values for a transmitted codeword in antennas of a MIMO receiver array in each of a sequence of time slots. Each vector forms one row of a matrix Y. Each antenna receives the signal values of one column of the matrix Y over the sequence of time slots such that one of the antennas receives the signal values of each column of the matrix Y. The method also includes evaluating a vector S(0, . . . , 0) for an associated zero m-component vector (0, . . . , 0). The vector S(0, . . . , 0) is given by a Hadamard transform of the diagonal part of the square matrix Y·Y†.

摘要翻译： 接收信息的方法包括在时隙序列中的每一个中接收MIMO接收器阵列的天线中的发射码字的信号值向量。 每个向量形成矩阵Y的一行。每个天线在时隙序列上接收矩阵Y的一列的信号值，使得一个天线接收矩阵Y的每列的信号值。该方法还 包括对相关联的零m分量向量（0，...，0）评估向量S（0，...，0）。 矢量S（0，...，0）由方阵Y.Y†对角线部分的Hadamard变换给出。

公开(公告)号：US07013116B2

公开(公告)日：2006-03-14

申请号：US10180727

申请日：2002-06-26

申请人： Alexei Ashikhmin ,  Gerhard Guenter Theodor Kramer ,  Stephan Ten Brink

发明人： Alexei Ashikhmin ,  Gerhard Guenter Theodor Kramer ,  Stephan Ten Brink

IPC分类号： H04B1/16

CPC分类号： H04L1/005 ,  H04L1/0065 ,  H04L1/0618

摘要： A method and apparatus for reducing the number of erred bits in the decoded signal by using a channel decoder whose transfer characteristic is matched to the transfer characteristic of the MIMO detector. This means that the curve of the transfer characteristic of the MIMO detector is 1) above the curve of the reflected transpose of the transfer characteristic of the channel decoder for about 95% of the curve, and 2) close to the reflected transpose of the curve of the transfer characteristic of the channel decoder. Particularly, an LDPCC decoder can be used as the channel decoder and can be matched to the MIMO detector by matching 1) the transfer characteristic of the LDPCC decoder's CND to 2) the transfer characteristic of a combination of the MIMO detector and the LDPCC VND. Furthermore, the LDPCC can be similarly matched to any appropriate detector in addition to or instead of the MIMO detector. Additionally, a receiver can re-match the transfer characteristics of the detector and the channel decoder when the channel characteristics and/or SNR of the received signals change.

摘要翻译： 一种用于通过使用其传输特性与MIMO检测器的传输特性匹配的信道解码器来减少解码信号中的错误比特数的方法和装置。 这意味着MIMO检测器的传输特性的曲线是1）高于曲线的约95％的信道解码器的传输特性的反射转置曲线，2）接近曲线的反射转置 的信道解码器的传输特性。 具体来说，可以将LDPCC解码器用作信道解码器，并且可以通过匹配1）LDPCC解码器的CND的传输特性与MIMO检测器和LDPCC VND的组合的传输特性进行匹配来匹配MIMO检测器。 此外，除了MIMO检测器之外或代替MIMO检测器，LDPCC可以类似地匹配于任何适当的检测器。 另外，当接收信号的信道特性和/或SNR改变时，接收机可以重新匹配检测器和信道解码器的传输特性。

公开(公告)号：US06990626B2

公开(公告)日：2006-01-24

申请号：US10112574

申请日：2002-03-29

申请人： Alexei Ashikhmin

发明人： Alexei Ashikhmin

IPC分类号： H03M13/03

CPC分类号： H04L1/0055 ,  H03M13/136 ,  H03M13/3944 ,  H03M13/45 ,  H03M13/616 ,  H04L1/0057

摘要： A method and apparatus are disclosed for MAP decoding of signals encoded using error correction codes to make maximum probability decisions about each transmitted bit. A MAP decoding algorithm is disclosed that exploits properties of Reed-Muller error correction codes that use q-ary block codes to provide a decoding algorithm having a complexity that is proportional to n logq n for Reed-Muller codes. The disclosed MAP decoding algorithm employs two matrices D and {overscore (D)} to represent the code set and has an overall complexity that is exponential for a general code set. For Reed-Muller codes, the disclosed MAP decoding algorithm employs matrices Bi and {overscore (Bi)} that are sparse matrices (i.e., contain many zero entries), thereby reducing the number of required operations and yielding a complexity that is proportional to n logq n. In addition, the disclosed MAP decoding algorithm permits faster decoding by permitting a parallel implementation having a critical path length that is proportional to 2 logq n for Reed-Muller codes.

摘要翻译： 公开了一种用于使用纠错码编码的信号进行MAP解码的方法和装置，以对每个发送的比特做出最大的概率决定。 公开了MAP解码算法，其利用使用q元块码的Reed-Muller纠错码的属性来提供具有与Reed-Muller的n log≠n成正比的复杂度的解码算法 代码。 所公开的MAP解码算法使用两个矩阵D和{overcore（D表示代码集，并且具有对于一般代码集是指数的总体复杂度）。对于Reed-Muller代码，所公开的MAP解码算法使用矩阵B < （即，包含许多零条目），从而减少所需操作的数量并产生与n对数成正比的复杂度 另外，所公开的MAP解码算法允许更快的解码，通过允许并行实现具有与Reed-Muller的2 log Q n成正比的关键路径长度 代码。