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51. 发明公开

EP2286562A1 METHODS AND ARRANGEMENTS IN A WIRELESS COMMUNICATION SYSTEM FOR PRODUCING SIGNAL STRUCTURE WITH CYCLIC PREFIX 有权
标题翻译：方法和安排无线通信系统，用来产生信号结构具有循环前缀
公开(公告)号：EP2286562A1
公开(公告)日：2011-02-23
申请号：EP08767178.0
申请日：2008-06-13
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： LARSSON, Peter , SAHLIN, Henrik
IPC分类号： H04L27/26
CPC分类号： H04L27/2607 , H04L1/0079 , H04L27/2662
摘要： The present invention relates to methods and arrangements in a wireless communication system supporting cyclic-prefix insertion, using a symbol sequence comprising a number of samples for transmission over a radio channel that enables the handling of very large signal delay spreads. The symbol sequence is built up by a first symbol with CP and a second symbol with CP. The second symbol is a copy of the first symbol with the samples shifted in a way that makes the two adjacent symbols with CP match in regards to the sample order. The symbol sequence may also comprise a third symbol with CP or more, where the third symbol is a copy of the second symbol and with the samples shifted in analogy with the symbol shift described above. The resulting symbol sequence will thus appear as an extended continuous symbol thanks to the precise cyclic shift that matches adjacent symbols. This allows the receiver to place its FFT window anywhere during the extended symbol, e.g. at the end of the symbol sequence thus making it possible to handle a delay spread longer than the CP duration. It also allows to place e.g. two FFT windows and to combine the extracted signal into one SNR improved signal, while still handling a longer delay spread.

52. 发明公开

EP2263415A1 A METHOD OF AND A RADIO TRANSMISSION SYSTEM AND RADIO ACCESS EQUIPMENT FOR CELLULAR WIRELESS RADIO TRANSMISSION 有权
标题翻译：方法及无线传输系统和无线接入设备用于蜂窝无线电传输
公开(公告)号：EP2263415A1
公开(公告)日：2010-12-22
申请号：EP08735074.0
申请日：2008-04-07
申请人： Telefonaktiebolaget L M Ericsson (PUBL)
发明人： SAHLIN, Henrik , LINDGREN, UIf , ZANGI, Kambiz
IPC分类号： H04W88/08
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 (1), wherein radio access equipment (2) of the system connects to multiple geographically spread radio antennas (3, 4, 5) of a Distributed Antenna System, DAS, for transmitting to and receiving radio signals from user equipment (6, 7, 8, 9, 10). Transmit timings for radio transmission between the user equipment (6, 7, 8, 9, 10) and the antennas (3, 4, 5) of the DAS are established. The radio transmission is scheduled based on the established transmit timings.
摘要翻译：该系统在正交频分复用无线电传输，OFDM，基于蜂窝无线无线电传输系统（1），worin无线电接入设备（2）连接到多个地理分散无线电天线（3，4，5）一个分布式天线系统的，DAS，用于从用户设备（6，7，8，9，10）传送和从其接收无线电信号。发送定时为所述用户设备（6，7，8，9，10）和所述天线之间的无线传输（3，4，5）的DAS成立。无线传输是基于所建立传送定时调度。

53. 发明申请

WO2009124558A1 A METHOD OF AND A RADIO TRANSMISSION SYSTEM AND RADIO ACCESS EQUIPMENT FOR CELLULAR WIRELESS RADIO TRANSMISSION 审中-公开
标题翻译：无线电无线传输方法和无线电传输系统和无线电接入设备
公开(公告)号：WO2009124558A1
公开(公告)日：2009-10-15
申请号：PCT/EP2008/002755
申请日：2008-04-07
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , SAHLIN, Henrik , LINDGREN, UIf , ZANGI, Kambiz
发明人： SAHLIN, Henrik , LINDGREN, UIf , ZANGI, Kambiz
IPC分类号： H04W88/08
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 (1 ), wherein radio access equipment (2) of the system connects to multiple geographically spread radio antennas (3, 4, 5) of a Distributed Antenna System, DAS, for transmitting to and receiving radio signals from user equipment (6, 7, 8, 9, 10). Transmit timings for radio transmission between the user equipment (6, 7, 8, 9, 10) and the antennas (3, 4, 5) 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（1）中的无线电传输，其中系统的无线电接入设备（2）连接到分布式天线系统的多个地理上扩展的无线电天线（3,4,5） DAS，用于发送和接收来自用户设备（6,7,8,9,10）的无线电信号。建立用户设备（6,7,8,9,10）与DAS的天线（3,4,5）之间的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。

54. 发明申请

WO2008025373A1 DETECTION OF ACCESS BURSTS IN A RANDOM ACCESS CHANNEL 审中-公开
标题翻译：在随机访问通道中检测访问冲突
公开(公告)号：WO2008025373A1
公开(公告)日：2008-03-06
申请号：PCT/EP2006/012507
申请日：2006-12-22
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , BALDEMAIR, Robert , SAHLIN, Henrik
发明人： BALDEMAIR, Robert , SAHLIN, Henrik
IPC分类号： H04Q7/32
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。

55. 发明申请

WO2012099511A1 RECEIVING NODE AND METHOD FOR DETERMINING CHANNEL ESTIMATE 审中-公开
标题翻译：接收节点和确定信道估计的方法
公开(公告)号：WO2012099511A1
公开(公告)日：2012-07-26
申请号：PCT/SE2011/050061
申请日：2011-01-20
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , SAHLIN, Henrik , PERSSON, Anders
发明人： SAHLIN, Henrik , PERSSON, Anders
IPC分类号： H04L25/02
CPC分类号： H04L25/022 , H04L1/0036 , H04L25/0204 , H04L25/023 , H04L25/0232 , H04L27/2647
摘要： The present invention relates to a receiving node, and to a related method for determining a channel estimate of a radio channel in a receiving node of a radio communication system. The method comprises calculating (10) a matched filter channel estimate based on a known reference signal and a received reference signal in a frequency domain, transforming (20) the matched filter channel estimate into an over-sampled transform domain channel estimate, applying (30) a window to the over-sampled transform domain channel estimate to achieve a windowed transform domain channel estimate, transforming (40) the windowed transform domain channel estimate into a frequency domain channel estimate, and compensating (50) for a bias in the over-sampled frequency domain channel estimate based on a digital sine function.
摘要翻译：本发明涉及一种接收节点，以及一种用于确定无线电通信系统的接收节点中的无线电信道的信道估计的相关方法。该方法包括基于已知参考信号和频域中的接收参考信号计算（10）匹配滤波器信道估计，将（20）匹配滤波器信道估计转换为过采样变换域信道估计，应用（30 ）窗口到过采样的变换域信道估计，以实现窗口化的变换域信道估计，将窗口化的变换域信道估计转换（40）到频域信道估计中，并且补偿（50）基于数字正弦函数的采样频域信道估计。

56. 发明申请

WO2002102008A1 BLIND DETECTION 审中-公开
标题翻译：盲点检测
公开(公告)号：WO2002102008A1
公开(公告)日：2002-12-19
申请号：PCT/SE2002/000803
申请日：2002-04-24
申请人： TELEFONAKTIEBOLAGET L M ERICSSON , SAHLIN, Henrik , AXNÄS, Johan , HEDBERG, Andreas
发明人： SAHLIN, Henrik , AXNÄS, Johan , HEDBERG, Andreas
IPC分类号： H04L27/00
CPC分类号： H04L27/2067 , H04L27/0012 , H04L27/2017
摘要： The present invention relates to 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 ({p 1 . p 2 ,..., p m }). According to the invention, the unknown property is automatically identified as follows. A respective quality measure (q 1 , q 2 ,..., q m ) is derived from the incoming signal (r(n)), which each represents a particular property in the finite set of alternatives ({p 1 , p 2 ,..., p m }). The quality measures (q 1 , q 2 ,..., q m ) 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 (q 1 , q 2 ,..., q m ) are compared with each other in order to find a quality measure, which best fulfils ablind selection criterion. The quality measure (q i ) thus obtained corresponds to the initially unknown property (p i ). 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 (C di ) that is adapted to this property (p i ).
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，其最初对于接收机是未知的，然而，限于有限的备选集合（{p1，p2，...，pm}）。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（q1，q2，...，qm），它们各自代表有限组备选方案中的特定属性（{p1，p2，...，下午}）。根据涉及对输入信号（r（n））中的任何不需要的信号分量的计算有效抑制的过程来获得质量度量（q1，q2，...，qm）。然后，将质量度量（q1，q2，...，qm）进行比较，以找到最符合ablind选择标准的质量度量。这样获得的质量测量（qi）对应于最初未知的属性（pi）。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）），该处理单元根据适合该属性（pi）的处理原理（Cdi）进行操作。

57. 发明申请

WO2009142563A1 METHOD FOR MOVING QUANTIZATION NOISE INTRODUCED IN FIXED-POINT CALCULATION OF FAST FOURIER TRANSFORMS 审中-公开
标题翻译：用于移动量化噪声的方法在快速傅立叶变换的固定点计算中引入
公开(公告)号：WO2009142563A1
公开(公告)日：2009-11-26
申请号：PCT/SE2008/050610
申请日：2008-05-23
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , SKYMAN, Anders , SAHLIN, Henrik
发明人： SKYMAN, Anders , SAHLIN, Henrik
IPC分类号： H04L27/26 , G06F17/14 , G06F7/76
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 (86, 98) 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 (88, 100) 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的方法，包括以下步骤：转换（86 ，98）从第一域到第二域的信号，产生具有第二域的至少一个区域中的量化噪声的具有一阶值的值的信号，并且对变换信号执行（88,100）循环移位以移动第二域中的量化噪声，产生第一移位信号。

58. 发明申请

WO2009051525A1 PRE-CODING FOR FREQUENCY SELECTIVE RADIO COMMUNICATION CHANNELS 审中-公开
标题翻译：频率选择无线电通信信道的预编码
公开(公告)号：WO2009051525A1
公开(公告)日：2009-04-23
申请号：PCT/SE2007/000902
申请日：2007-10-15
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , LINDGREN, Ulf , KRASNY, Leonid , SAHLIN, Henrik
发明人： LINDGREN, Ulf , KRASNY, Leonid , SAHLIN, Henrik
IPC分类号： H04L25/03
CPC分类号： H04L25/03343 , H04B7/0617 , H04B7/0626 , H04L2025/03426 , H04L2025/03802
摘要： The present invention relates to a method for processing signals to be transmitted in a MIMO system (10; 28) from a transmitter A, B; C having at least two transmitting antennas (11-12, 13-14; 29-31) to a receiver A, B; D having at least two receiving antennas (11- 12, 13-14; 32-34) 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：本发明涉及一种处理从发射机A，B发送到MIMO系统（10; 28）的信号的方法; C具有至少两个发射天线（11-12,13-14; 29-31）到接收机A，B; D在频率选择性通信信道上具有至少两个接收天线（11-12,13-14; 32-34）。该方法包括基于时间延迟来估计信道矩阵H（Q-1）的元素和与通信信道相关联的复值系数，以提供信道矩阵的每个元素的估计的频率变化函数，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。

59. 发明申请

WO2010099808A1 A METHOD OF AND EQUIPMENT FOR COMPENSATING CARRIER FREQUENCY OFFSET IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WIRELESS RADIO TRANSMISSION SYSTEM 审中-公开
标题翻译：用于补偿正交频分多址无线射频传输系统中载波频偏的方法和设备
公开(公告)号：WO2010099808A1
公开(公告)日：2010-09-10
申请号：PCT/EP2009/001625
申请日：2009-03-06
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) , LINDGREN, Ulf , SAHLIN, Henrik
发明人： LINDGREN, Ulf , SAHLIN, Henrik
IPC分类号： H04L27/26
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 to the 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，其中以常规时间重复方式发送通信设备已知的参考信号，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）。

60. 发明申请

WO2007089199A2 METHOD AND ARRANGEMENT IN A TELECOMMUNICATION SYSTEM 审中-公开
标题翻译：电信系统中的方法和布置
公开(公告)号：WO2007089199A2
公开(公告)日：2007-08-09
申请号：PCT/SE2007/050037
申请日：2007-01-24
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , SAHLIN, Henrik , HAARTSEN, Jacobus , BALDEMAIR, Robert , PARKVALL, Stefan , PETERS, Gunnar
发明人： SAHLIN, Henrik , HAARTSEN, Jacobus , BALDEMAIR, Robert , PARKVALL, Stefan , PETERS, Gunnar
IPC分类号： H04B1/707 , H04J3/06 , H04Q7/38
CPC分类号： H04W74/0833 , H04J13/0003 , H04L27/2607 , H04L27/2613 , H04W74/08
摘要： There is provided a method of operating a communication system, the communication system comprising a user equipment and a receiver, the method in the system comprising generating a random access transmission in a user equipment and transmitting the random access transmission to the receiver in the communication system, the random access transmission including a preamble; receiving the random access transmission from the user equipment at the receiver; processing the random access transmission in the frequency domain to detect the preamble. In preferred embodiments of the invention, the preamble has a cyclic prefix, or is preceded by a plurality of zero-valued symbols.
摘要翻译：提供了一种操作通信系统的方法，所述通信系统包括用户设备和接收机，所述系统中的方法包括在用户设备中生成随机接入传输并将所述随机接入传输发送到所述通信系统中的接收机，所述随机接入传输包括前同步码; 在接收机处接收来自用户设备的随机接入传输; 处理频域中的随机接入传输以检测前导码。在本发明的优选实施例中，前导码具有循环前缀，或者在多个零值符号之前。

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