公开(公告)号：US20110026626A1

公开(公告)日：2011-02-03

申请号：US12936301

申请日：2008-04-07

申请人： Henrik Sahlin ,  Ulf Lindgren ,  Kambiz Zangi

发明人： Henrik Sahlin ,  Ulf Lindgren ,  Kambiz Zangi

IPC分类号： H04L27/28

CPC分类号： H04L5/0037 ,  H04L5/0023 ,  H04W56/0005 ,  H04W88/085 ,  H04W92/10

摘要： Radio transmission in an Orthogonal Frequency Division Multiplex, OFDM, based cellular wireless radio transmission system, wherein radio access equipment of the system connects to multiple geographically spread radio antennas of a Distributed Antenna System, DAS, for transmitting to and receiving radio signals from user equipment. Transmit timings for radio transmission between the user equipment and the antennas of the DAS are established. The radio transmission is scheduled based on the established transmit timings.

摘要翻译： 在正交频分复用OFDM基于蜂窝无线电传输系统中的无线电传输，其中系统的无线电接入设备连接到分布式天线系统DAS的多个地理上扩展的无线电天线，用于发送和接收来自用户设备的无线电信号 。 建立用户设备和DAS天线之间无线电传输的发送定时。 基于建立的发送定时来调度无线电传输。

公开(公告)号：US09628232B2

公开(公告)日：2017-04-18

申请号：US12936301

申请日：2008-04-07

申请人： Henrik Sahlin ,  Ulf Lindgren ,  Kambiz Zangi

发明人： Henrik Sahlin ,  Ulf Lindgren ,  Kambiz Zangi

IPC分类号： H04L5/06 ,  H04L5/26 ,  H04W56/00 ,  H04W88/08 ,  H04W92/10 ,  H04L5/00

CPC分类号： H04L5/0037 ,  H04L5/0023 ,  H04W56/0005 ,  H04W88/085 ,  H04W92/10

摘要： Radio transmission in an Orthogonal Frequency Division Multiplex, OFDM, based cellular wireless radio transmission system, wherein radio access equipment of the system connects to multiple geographically spread radio antennas of a Distributed Antenna System, DAS, for transmitting to and receiving radio signals from user equipment. Transmit timings for radio transmission between the user equipment and the antennas of the DAS are established. The radio transmission is scheduled based on the established transmit timings.

公开(公告)号：US20100215113A1

公开(公告)日：2010-08-26

申请号：US12682706

申请日：2007-10-15

申请人： Ulf Lindgren ,  Leonid Krasny ,  Henrik Sahlin

发明人： Ulf Lindgren ,  Leonid Krasny ,  Henrik Sahlin

IPC分类号： H04B7/02 ,  H04L27/00

CPC分类号： H04L25/03343 ,  H04B7/0617 ,  H04B7/0626 ,  H04L2025/03426 ,  H04L2025/03802

摘要： A method for processing signals to be transmitted in a MIMO system from a transmitter having at least two transmitting antennas to a receiver having at least two receiving antennas on a frequency selective communication channel. The method comprises estimating elements of a channel matrix H(q−1) based on time delays and complex valued coefficients associated with the communication channel to provide an estimated frequency variation function of each element of the channel matrix, and pre-coding the signals to be transmitted based on the estimated frequency variation function for each element. The invention also relates to a MIMO system; and a transmitter and a receiver for use in a MIMO system.

摘要翻译： 一种用于处理在MIMO系统中从具有至少两个发射天线的发射机发射到在频率选择性通信信道上具有至少两个接收天线的接收机的信号的方法。 该方法包括基于与通信信道相关联的时间延迟和复值系数来估计信道矩阵H（q-1）的元素，以提供信道矩阵的每个元素的估计频率变化函数，并将该信号预编码为 基于每个元素的估计频率变化函数来发送。 本发明还涉及MIMO系统; 以及用于MIMO系统的发射机和接收机。

公开(公告)号：US20120219098A1

公开(公告)日：2012-08-30

申请号：US13502432

申请日：2009-10-20

申请人： Ulf Lindgren ,  Henrik Sahlin

发明人： Ulf Lindgren ,  Henrik Sahlin

IPC分类号： H04B1/10 ,  H04L27/06

CPC分类号： H04L25/03114 ,  H04L25/0242 ,  H04L25/03993

摘要： The present invention relates to a node (1) in a wireless communication network, where the node (1) is arranged to receive at least two signals (y1(n), y2(n)) which correspond to at least two transmitted uncorrelated signal streams (x1(n), X2(n)) which have been transmitted to the node via a channel. The channel (2) is signals represented by means of a channel matrix (H(q−1)). The node (1) comprises a controllable filter structure (3) that is arranged to diagonalize the channel matrix (H(q−1)) such that a channel matrix estimation (Ĥ(q−1)) may be obtained. The present invention also relates to a corresponding method.

摘要翻译： 本发明涉及无线通信网络中的节点（1），其中节点（1）被布置为接收与至少两个发送的不相关信号对应的至少两个信号（y1（n），y2（n））） 已经通过信道被发送到节点的流（x1（n），X2（n））。 信道（2）是通过信道矩阵（H（q-1））表示的信号。 节点（1）包括可控滤波器结构（3），其被布置为使信道矩阵（H（q-1））对角化，使得可以获得信道矩阵估计（Ĥ（q-1））。 本发明还涉及相应的方法。

公开(公告)号：US20120014467A1

公开(公告)日：2012-01-19

申请号：US13254075

申请日：2009-03-06

申请人： Ulf Lindgren ,  Henrik Sahlin

发明人： Ulf Lindgren ,  Henrik Sahlin

IPC分类号： H04L27/28

CPC分类号： H04L27/266 ,  H04L27/2659

摘要： For compensating carrier frequency generation in communication equipment for radio transmission in an Orthogonal Frequency Division Multiplex, OFDM, based wireless radio communication system, in which reference signals known communication equipment are transmitted in a regular time repetitive manner, carrier frequency generation is compensated (63) by a calculated carrier frequency offset estimate. The carrier frequency offset estimate in the communication equipment is calculated from coarse (61) and fine carrier frequency offset estimates (62). The coarse carrier frequency offset estimate (61) is calculated in the frequency domain from reference symbols of a reference signal received (60) at the communication equipment and the fine carrier frequency offset estimate (62) is calculated in the time domain from reference symbols of reference signals repetitively received (60) at said communication equipment. An algorithm and an estimator module (90) for calculating a coarse carrier frequency offset are provided.

摘要翻译： 为了补偿在正交频分复用的基于OFDM的无线电通信系统中的用于无线电传输的通信设备中的载波频率产生，其中通信设备已知的参考信号以规则的时间重复方式发送，载波频率产生被补偿（ 63）通过计算的载波频率偏移估计。 通信设备中的载波频率偏移估计由粗略（61）和精细载波频率偏移估计（62）计算。 在通信设备处接收到的参考信号（60）的参考符号的频域中计算粗略载波频率偏移估计（61），并且在时域中从参考符号的参考符号计算精细载波频率偏移估计（62） 在所述通信设备处重复地接收（60）的参考信号。 提供了一种用于计算粗载波频率偏移的算法和估计器模块（90）。

公开(公告)号：US08711987B2

公开(公告)日：2014-04-29

申请号：US13264192

申请日：2009-04-16

申请人： Henrik Sahlin ,  Ulf Lindgren ,  Peter Naucler ,  Chester Park

发明人： Henrik Sahlin ,  Ulf Lindgren ,  Peter Naucler ,  Chester Park

IPC分类号： H04L27/06

CPC分类号： H04L27/2647 ,  H04L25/0204 ,  H04L25/0246 ,  H04L25/025 ,  H04L25/03159 ,  H04L25/03216 ,  H04L25/03254 ,  H04L25/0328 ,  H04L25/03299 ,  H04L25/03305 ,  H04L25/03318 ,  H04L2025/03375

摘要： The present invention relates to a method in a receiver for decoding at least two received communication signals, wherein the communication signals are modulated, pre-coded by a discrete Fourier transform and transmitted by means of single-carrier frequency division multiple access scheme (SC-FDMA). The method comprises the steps of: performing an antenna combining and equalization on a signal observed at the receiver; performing inverse discrete Fourier transform on a model of the observed signal; whitening a time domain model of the observed signal; and jointly detecting the received at least two communication signals by performing soft value calculations based on maximum likelihood detection of a whitened time domain model using a whitened time domain channel estimate.

摘要翻译： 本发明涉及用于对至少两个接收到的通信信号进行解码的接收机中的方法，其中通过离散付里叶变换对通信信号进行调制，预编码，并通过单载波频分多址方案（SC- FDMA）。 该方法包括以下步骤：对接收机上观察到的信号执行天线组合和均衡; 对观测信号的模型执行逆离散傅里叶变换; 美白观察信号的时域模型; 并且通过使用白化的时域信道估计基于白化时域模型的最大似然检测执行软值计算来共同检测所接收的至少两个通信信号。

公开(公告)号：US08509334B2

公开(公告)日：2013-08-13

申请号：US12682706

申请日：2007-10-15

申请人： Ulf Lindgren ,  Leonid Krasny ,  Henrik Sahlin

发明人： Ulf Lindgren ,  Leonid Krasny ,  Henrik Sahlin

IPC分类号： H04B7/02 ,  H04L27/06

CPC分类号： H04L25/03343 ,  H04B7/0617 ,  H04B7/0626 ,  H04L2025/03426 ,  H04L2025/03802

摘要： A method for processing signals to be transmitted in a MIMO system from a transmitter having at least two transmitting antennas to a receiver having at least two receiving antennas on a frequency selective communication channel. The method comprises estimating elements of a channel matrix H(q−1) based on time delays and complex valued coefficients associated with the communication channel to provide an estimated frequency variation function of each element of the channel matrix, and pre-coding the signals to be transmitted based on the estimated frequency variation function for each element. The invention also relates to a MIMO system; and a transmitter and a receiver for use in a MIMO system.

摘要翻译： 一种用于处理在MIMO系统中从具有至少两个发射天线的发射机发射到在频率选择性通信信道上具有至少两个接收天线的接收机的信号的方法。 该方法包括基于与通信信道相关联的时间延迟和复值系数来估计信道矩阵H（q-1）的元素，以提供信道矩阵的每个元素的估计频率变化函数，并将该信号预编码为 基于每个元素的估计频率变化函数来发送。 本发明还涉及MIMO系统; 以及用于MIMO系统的发射机和接收机。

公开(公告)号：US20120033683A1

公开(公告)日：2012-02-09

申请号：US13264192

申请日：2009-04-16

申请人： Henrik Sahlin ,  Ulf Lindgren ,  Peter Naucler ,  Chester Park

发明人： Henrik Sahlin ,  Ulf Lindgren ,  Peter Naucler ,  Chester Park

IPC分类号： H04J1/00

CPC分类号： H04L27/2647 ,  H04L25/0204 ,  H04L25/0246 ,  H04L25/025 ,  H04L25/03159 ,  H04L25/03216 ,  H04L25/03254 ,  H04L25/0328 ,  H04L25/03299 ,  H04L25/03305 ,  H04L25/03318 ,  H04L2025/03375

摘要： The present invention relates to a method in a receiver for decoding at least two received communication signals, wherein the communication signals are modulated, pre-coded by a discrete Fourier transform and transmitted by means of single-carrier frequency division multiple access scheme (SC-FDMA). The method comprises the steps of: performing an antenna combining and equalization on a signal observed at the receiver; performing inverse discrete Fourier transform on a model of the observed signal; whitening a time domain model of the observed signal; and jointly detecting the received at least two communication signals by performing soft value calculations based on maximum likelihood detection of a whitened time domain model using a whitened time domain channel estimate.

摘要翻译： 本发明涉及用于对至少两个接收到的通信信号进行解码的接收机中的方法，其中通过离散付里叶变换对通信信号进行调制，预编码，并通过单载波频分多址方案（SC- FDMA）。 该方法包括以下步骤：对接收机上观察到的信号执行天线组合和均衡; 对观测信号的模型执行逆离散傅里叶变换; 美白观察信号的时域模型; 并且通过使用白化的时域信道估计基于白化时域模型的最大似然检测执行软值计算来共同检测所接收的至少两个通信信号。

公开(公告)号：US09184947B2

公开(公告)日：2015-11-10

申请号：US13502432

申请日：2009-10-20

申请人： Ulf Lindgren ,  Henrik Sahlin

发明人： Ulf Lindgren ,  Henrik Sahlin

IPC分类号： H04L27/06 ,  H04L25/03 ,  H04L25/02

CPC分类号： H04L25/03114 ,  H04L25/0242 ,  H04L25/03993

摘要： The present invention relates to a node (1) in a wireless communication network, where the node (1) is arranged to receive at least two signals (y1(n), y2(n)) which correspond to at least two transmitted uncorrelated signal streams (x1(n), X2(n)) which have been transmitted to the node via a channel. The channel (2) is signals represented by means of a channel matrix (H(q−1)). The node (1) comprises a controllable filter structure (3) that is arranged to diagonalize the channel matrix (H(q−1)) such that a channel matrix estimation (Ĥ(q−1)) may be obtained. The present invention also relates to a corresponding method.

摘要翻译： 本发明涉及无线通信网络中的节点（1），其中节点（1）被布置为接收与至少两个发送的不相关信号对应的至少两个信号（y1（n），y2（n））） 已经通过信道被发送到节点的流（x1（n），X2（n））。 信道（2）是通过信道矩阵（H（q-1））表示的信号。 节点（1）包括可控滤波器结构（3），其被布置为使信道矩阵（H（q-1））对角化，使得可以获得信道矩阵估计（Ĥ（q-1））。 本发明还涉及相应的方法。

公开(公告)号：US08660197B2

公开(公告)日：2014-02-25

申请号：US13254075

申请日：2009-03-06

申请人： Ulf Lindgren ,  Henrik Sahlin

发明人： Ulf Lindgren ,  Henrik Sahlin

IPC分类号： H04K1/10

CPC分类号： H04L27/266 ,  H04L27/2659

摘要： For compensating carrier frequency generation in communication equipment for radio transmission in an Orthogonal Frequency Division Multiplex, OFDM, based wireless radio communication system, in which reference signals known communication equipment are transmitted in a regular time repetitive manner, carrier frequency generation is compensated (63) by a calculated carrier frequency offset estimate. The carrier frequency offset estimate in the communication equipment is calculated from coarse (61) and fine carrier frequency offset estimates (62). The coarse carrier frequency offset estimate (61) is calculated in the frequency domain from reference symbols of a reference signal received (60) at the communication equipment and the fine carrier frequency offset estimate (62) is calculated in the time domain from reference symbols of reference signals repetitively received (60) at said communication equipment. An algorithm and an estimator module (90) for calculating a coarse carrier frequency offset are provided.

摘要翻译： 为了补偿在正交频分复用的基于OFDM的无线电通信系统中的用于无线电传输的通信设备中的载波频率产生，其中通信设备已知的参考信号以规则的时间重复方式发送，载波频率产生被补偿（ 63）通过计算的载波频率偏移估计。 通信设备中的载波频率偏移估计由粗略（61）和精细载波频率偏移估计（62）计算。 在通信设备处接收到的参考信号（60）的参考符号的频域中计算粗略载波频率偏移估计（61），并且在时域中从参考符号的参考符号计算精细载波频率偏移估计（62） 在所述通信设备处重复地接收（60）的参考信号。 提供了一种用于计算粗载波频率偏移的算法和估计器模块（90）。