公开(公告)号：US07899402B2

公开(公告)日：2011-03-01

申请号：US11721580

申请日：2004-12-15

申请人： Henrik Sahlin

发明人： Henrik Sahlin

IPC分类号： H04B17/00

CPC分类号： G01S11/06 ,  H04B7/01

摘要： Method of estimating Doppler spread comprising the steps of estimating a de-biased value according to the relation Formula (I), is a preliminary Doppler spread squared, based on measured parameters, and K2 is a constant.

摘要翻译： 估计多普勒扩展的方法包括根据关系式（I）估计去偏置值的步骤，是基于测量参数的初步多普勒扩展平方，而K2是常数。

公开(公告)号：US07421261B2

公开(公告)日：2008-09-02

申请号：US10479102

申请日：2002-04-24

申请人： Henrik Sahlin ,  Johan Axnäs ,  Andreas Hedberg

发明人： Henrik Sahlin ,  Johan Axnäs ,  Andreas Hedberg

IPC分类号： H04B17/02

CPC分类号： H04L27/2067 ,  H04L27/0012 ,  H04L27/2017

摘要： The present invention relates to a blind detection of a received signal having at least one property, which initially is unknown to the receiver, however, limited to a finite set of alternatives ({p1, p2, . . . , pm}). According to the invention, the unknown property is automatically identified as follows. A respective quality measure (q1, q2, . . . , qm) is derived from the incoming signal (r(n)), which each represents a particular property in the finite set of alternatives ({p1, p2, . . . , pm}). The quality measures (q1, q2, . . . , qm) are obtained according to a procedure that involves a computationally efficient rejection of any unwanted signal components in the incoming signal (r(n)). Then, the quality measures (q1, q2, . . . , qm) are compared with each other in order to find a quality measure, which best fulfills a blind selection criterion. The quality measure (qi) thus obtained corresponds to the initially unknown property (pi). For instance, based on this information, the incoming signal (r(n)) may then be further processed in a processing unit (122), which operates according to a processing principle (Cdi) that is adapted to this property (pi).

摘要翻译： 本发明涉及对具有至少一个属性的接收信号的盲检测，该属性最初对于接收机是未知的，然而，限于有限的备选集合（{p < > 2 ，...，p }）。 根据本发明，自动识别未知属性如下。 从输入信号（r（n））导出相应的质量度量（q 1，q 2，...，q m 2） ），其各自表示有限的替代方案中的特定属性（{p ，p ，...，p ）。 根据涉及计算有效排斥的程序获得质量测量（q 1，q 2，...，q m 2） 输入信号（r（n））中的任何不需要的信号分量。 然后，将质量度量（q 1，...，q 2，...，q m）彼此进行比较，以便找到 质量测量，最符合盲目选择标准。 这样获得的质量测量值对应于最初未知的属性（p N）。 例如，基于该信息，可以在处理单元（122）中进一步处理输入信号（r（n）），处理单元（122）根据处理原理（C SUB）来操作 适用于该属性（p ）。

公开(公告)号：US09241333B2

公开(公告)日：2016-01-19

申请号：US13976559

申请日：2011-01-13

申请人： Henrik Sahlin ,  Bo Göransson

发明人： Henrik Sahlin ,  Bo Göransson

IPC分类号： H04W72/04 ,  H04L5/00 ,  H04B7/02 ,  H04B7/08 ,  H04W88/08 ,  H04W92/20

CPC分类号： H04W72/0486 ,  H04B7/024 ,  H04B7/0842 ,  H04L5/0035 ,  H04W72/0426 ,  H04W88/08 ,  H04W92/20

摘要： A base station module configured to be part of a group of base station modules comprising the base station module and other base station modules, the group of base station modules together forming a base station, and having antennas for receiving radio signals from mobile stations in a base station communication band, a communication interface for transferring data obtained via the received radio signals to the other base station modules and for receiving corresponding data from the other base station module, a data handling unit selects data for transfer to the other base station modules and an uplink data processing unit processes channels used by a subset of the mobile stations communicating with the base station, where the subset is assigned to the base station module. The base station module uses the data received from the other base station modules to influence processing in the uplink data processing unit.

摘要翻译： 一种基站模块，被配置为作为一组基站模块的一部分，所述基站模块包括所述基站模块和其它基站模块，所述一组基站模块一起形成基站，并且具有用于从移动台接收无线电信号的天线 基站通信频带，用于将通过接收到的无线电信号获得的数据传送到其他基站模块并用于从其他基站模块接收对应数据的通信接口，数据处理单元选择用于传送到其他基站模块的数据， 上行链路数据处理单元处理与基站通信的移动站的子集使用的信道，其中子集被分配给基站模块。 基站模块使用从其他基站模块接收的数据来影响上行链路数据处理单元中的处理。

公开(公告)号：US20120236924A1

公开(公告)日：2012-09-20

申请号：US13513041

申请日：2009-12-01

申请人： Henrik Sahlin ,  Björn Ulf Anders Sihlbom

发明人： Henrik Sahlin ,  Björn Ulf Anders Sihlbom

IPC分类号： H04L27/01 ,  H04L27/06

CPC分类号： H04L25/03133 ,  H04B1/7115 ,  H04L25/03159

摘要： The present invention describes a channel equalizer and a method for channel equalization in a receiver in a multi-user communication system. The method comprises the steps of receiving a signal with at least two antennas to produce at least two antenna input streams, measuring the temporal of each antenna input stream and the spatial correlation between the antenna input streams, determining a user-independent pre-equalization filter from the temporal and spatial correlation, filtering the antenna input streams with the pre-equalization filter, and finally inputting the filtered signal to a user-dependent receiver configured to detect the received data symbols of a given user.

摘要翻译： 本发明描述了多用户通信系统中的接收机中的信道均衡器和信道均衡方法。 该方法包括以下步骤：接收具有至少两个天线的信号以产生至少两个天线输入流，测量每个天线输入流的时间和天线输入流之间的空间相关性，确定与用户无关的预均衡滤波器 从时间和空间相关性，用预均衡滤波器对天线输入流进行滤波，最后将经滤波的信号输入到被配置为检测给定用户的接收数据符号的用户相关接收器。

公开(公告)号：US08155251B2

公开(公告)日：2012-04-10

申请号：US12439401

申请日：2006-12-22

申请人： Robert Baldemair ,  Henrik Sahlin

发明人： Robert Baldemair ,  Henrik Sahlin

IPC分类号： H03D1/00

CPC分类号： H04W24/00 ,  H04W74/08 ,  H04W88/08

摘要： A technique for detecting one or more access bursts (112) in a random access channel (110) is described. Each access burst includes a transmission preamble, the transmission preamble being a member of a preamble set including sequences of preamble symbols that can be obtained by cyclically shifting a basic preamble sequence. A detector (118, 120) in a radio base station (108) determines correlation information indicative of a correlation of a single correlation preamble with each of the one or more received transmission preambles, wherein the correlation preamble is a member of the preamble set. The one or more access bursts are detected based on the correlation information.

摘要翻译： 描述了用于检测随机接入信道（110）中的一个或多个接入脉冲串（112）的技术。 每个接入脉冲串包括传输前同步码，所述发射前导码是包括可以通过循环移位基本前同步码序列而获得的前导符号序列的前同步码集的成员。 无线电基站（108）中的检测器（118,120）确定指示单个相关前同步码与一个或多个接收到的传输前导码中的每一个的相关性的相关信息，其中相关前同步码是前同步码组的成员。 基于相关信息来检测一个或多个访问突发。

公开(公告)号：US20110188563A1

公开(公告)日：2011-08-04

申请号：US13014090

申请日：2011-01-26

申请人： Miguel LOPEZ ,  Henrik Sahlin

发明人： Miguel LOPEZ ,  Henrik Sahlin

IPC分类号： H04L27/02

CPC分类号： H04L25/0224 ,  H04L27/2605

摘要： By exploiting the multi-block structure of the used slot format having a training sequence in the time domain and at least one pre-coded user data block to sequentially reconstruct the slot, using in the first act known symbols and using detected symbols in each subsequent act and improved receiver may be provided. This may result in less ISI/IBI and therefore increased performance.

摘要翻译： 通过利用在时域中具有训练序列的所使用的时隙格式的多块结构和至少一个预编码的用户数据块来顺序地重构时隙，在第一动作中使用已知的符号并且在每个后续的步骤中使用检测到的符号 可以提供动作和改进的接收器。 这可能导致较少的ISI / IBI，从而提高性能。

公开(公告)号：US20110069694A1

公开(公告)日：2011-03-24

申请号：US12994289

申请日：2008-05-23

申请人： Anders Skyman ,  Henrik Sahlin

发明人： Anders Skyman ,  Henrik Sahlin

IPC分类号： H04B15/00 ,  H04L27/28 ,  H04J1/00 ,  H04J3/00

CPC分类号： H04L27/2628 ,  G06F17/142 ,  H04L27/2607

摘要： The invention discloses a method in an electronic communication device for processing a digital signal within a wireless communication network in order to transform the digital signal from a first domain representation to a second domain representation in a communication device, comprising the steps of: transforming the signal from the first domain to the second domain resulting in a signal of a first order of values with quantization noise in at least one area of the second domain, and performing a cyclic shift on the transformed signal to move the quantization noise in the second domain, resulting in a first shifted signal.

摘要翻译： 本发明公开了一种电子通信设备中的方法，用于处理无线通信网络内的数字信号，以便将数字信号从第一域表示转换成通信设备中的第二域表示，包括以下步骤：将信号 从所述第一域到所述第二域，在所述第二域的至少一个区域中产生具有量化噪声的值的一阶信号，并且对所述变换的信号执行循环移位以移动所述第二域中的量化噪声， 导致第一移位信号。

公开(公告)号：US20100317305A1

公开(公告)日：2010-12-16

申请号：US12599426

申请日：2007-05-09

申请人： Henrik Sahlin

发明人： Henrik Sahlin

IPC分类号： H04B1/18

CPC分类号： H04L25/0212 ,  H04L5/0007 ,  H04L25/0224

摘要： The present invention relates to a receiver for a radio network. The receiver com-prises a receiving unit and a channel estimation unit (18). The receiving unit is arranged to receive a number of time domain signals forming a plurality of symbols, each symbol having a cyclic prefix. The channel estimation unit is (18) arranged to determine a channel estimate (hos) in the time domain for a user (u) based on known pilots in the signals received by the receiving unit, and to determine the channel estimate (hos) for a user (u) using a DFT matrix (V) with a fundamental period related to a number (Nc) of sub-carriers associated to said user (u), wherein the channel estimate (hos) has a length of L taps, L being less that the number (Nc) of sub-carriers associated to said user. The present invention also relates to a method for determining a channel estimate (hos) for a radio channel.

摘要翻译： 本发明涉及无线电网络的接收机。 接收器包括接收单元和信道估计单元（18）。 接收单元被布置为接收形成多个符号的多个时域信号，每个符号具有循环前缀。 信道估计单元（18）被布置为基于由接收单元接收的信号中的已知导频来确定用户（u）的时域中的信道估计（hos），并且确定用于（u）的信道估计 使用具有与与所述用户（u）相关联的子载波的数量（Nc）相关的基本周期的DFT矩阵（V）的用户（u），其中所述信道估计（hos）具有L个抽头的长度，L 小于与所述用户相关联的子载波的数量（Nc）。 本发明还涉及一种用于确定无线电信道的信道估计（hos）的方法。

公开(公告)号：US20100002573A1

公开(公告)日：2010-01-07

申请号：US12439401

申请日：2006-12-22

申请人： Robert Baldemair ,  Henrik Sahlin

发明人： Robert Baldemair ,  Henrik Sahlin

IPC分类号： H04J11/00 ,  H04W4/00

CPC分类号： H04W24/00 ,  H04W74/08 ,  H04W88/08

摘要： A technique for detecting one or more access bursts (112) in a random access channel (110) is described. Each access burst includes a transmission preamble, the transmission preamble being a member of a preamble set including sequences of preamble symbols that can be obtained by cyclically shifting a basic preamble sequence. A detector (118, 120) in a radio base station (108) determines correlation information indicative of a correlation of a single correlation preamble with each of the one or more received transmission preambles, wherein the correlation preamble is a member of the preamble set. The one or more access bursts are detected based on the correlation information.

摘要翻译： 描述了用于检测随机接入信道（110）中的一个或多个接入脉冲串（112）的技术。 每个接入脉冲串包括传输前同步码，所述发射前导码是包括可以通过循环移位基本前同步码序列而获得的前导符号序列的前同步码集的成员。 无线电基站（108）中的检测器（118,120）确定指示单个相关前同步码与一个或多个接收到的传输前导码中的每一个的相关性的相关信息，其中相关前同步码是前同步码组的成员。 基于相关信息来检测一个或多个访问突发。

公开(公告)号：US09590687B2

公开(公告)日：2017-03-07

申请号：US14408651

申请日：2012-06-18

申请人： Henrik Sahlin ,  Miguel Lopez

发明人： Henrik Sahlin ,  Miguel Lopez

IPC分类号： H04L27/06 ,  H04B1/40 ,  H04B7/04 ,  H04L25/03 ,  H04L25/02

CPC分类号： H04B1/40 ,  H04B7/0413 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0242 ,  H04L25/0246 ,  H04L25/03 ,  H04L25/03891 ,  H04L2025/03426

摘要： Data signals transmitted by a plurality of transmitting antennas over a radio channel are demodulated. The method comprises receiving (202) on a plurality of receiving antennas, a data signal and a reference signal, the contents of the reference signal being known a priori to the receiver. The contents of the reference signal are used for calculating (204) an estimated polynomial channel matrix. A polynomial pre-filter matrix is calculated (206, 208) by a decomposition of the estimated polynomial channel matrix into a product of a paraunitary polynomial matrix and an upper triangular polynomial matrix with minimum phase filters on its main diagonal, where the polynomial pre-filter matrix is obtained by calculating the paraconjugate of the paraunitary polynomial matrix. The received data signal is demodulated (212) where the received data signal is multiplied with the calculated polynomial pre-filter matrix.

摘要翻译： 由无线电信道上的多个发送天线发送的数据信号被解调。 该方法包括在多个接收天线上接收（202）数据信号和参考信号，参考信号的内容先于接收机已知。 参考信号的内容用于计算（204）估计的多项式信道矩阵。 通过将估计的多项式信道矩阵分解为在其主对角线上具有最小相位滤波器的超幺多项式矩阵和上三角多项式矩阵的乘积来计算多项式预滤波器矩阵（206,208），其中多项式预滤波器矩阵 滤波矩阵是通过计算超幺正多项式矩阵的附属函数得到的。 接收的数据信号被解调（212），其中所接收的数据信号与计算的多项式预滤波器矩阵相乘。