公开(公告)号：EP2070213B1

公开(公告)日：2018-07-04

申请号：EP06805815.5

申请日：2006-09-22

Applicant: Telecom Italia S.p.A.

Inventor： CROZZOLI, Maurizio ,  DISCO, Daniele

IPC: H04B7/06 ,  H04B7/08 ,  H01Q3/26 ,  H01Q21/22

CPC classification number: H01Q3/26 ,  H01Q21/22 ,  H04B7/0854

Abstract: A method for synthesizing an array factor for an array antenna based on a target shape of an array factor amplitude, includes: calculating an array factor phase based on the target shape of the array factor amplitude, and calculating array antenna weight coefficients using the least mean square method, where a target function used in the least mean square method is a complex function composed by the target shape of the array factor amplitude and the calculated array factor phase, wherein the calculated weight coefficients determine the array factor.

公开(公告)号：EP3317979A1

公开(公告)日：2018-05-09

申请号：EP16730667.9

申请日：2016-06-09

Applicant: Qualcomm Incorporated

Inventor： WALKER, Gordon Kent ,  LEBRUN, Guillaume Philippe ,  OZAKI, Ernest Tadashi ,  FARMAHINI FARAHANI, Mohsen

IPC: H04B7/08 ,  H01Q3/26

CPC classification number: H04N5/50 ,  H01Q5/49 ,  H01Q19/30 ,  H01Q21/29 ,  H04B7/0854 ,  H04B7/0857

Abstract: Systems and methods which provide enhanced isolation for receivers using relatively simple and inexpensive modifications or additional circuitry at a receiving station. Embodiments augment a primary antenna of a receiving station with a correlated heterogeneous antenna element. Augmented antenna systems of embodiments provide an appreciable increase in front-to-back isolation with respect to desired signals received at a receiving station. Such augmented antenna systems are particularly useful in a high interference environment, such as an interference limited environment as may be experienced at the edge of two Single Frequency Networks (SFNs). For example, embodiments of an augmented antenna system may be utilized in situations in which positive carrier to noise ratio (C/N) conditions are present (e.g., more signal than noise is present in the desired signal and more signal than noise is present in the interfering signal).

公开(公告)号：EP3261308A4

公开(公告)日：2018-02-21

申请号：EP15882481

申请日：2015-12-29

Applicant: SANECHIPS TECH CO LTD

Inventor： WU GANG

IPC: H04L27/26 ,  H04B7/08 ,  H04B17/345 ,  H04J11/00

CPC classification number: H04B7/0854 ,  H04B7/08 ,  H04J11/0036 ,  H04L25/0228 ,  H04L25/0244 ,  H04L25/0246 ,  H04L25/03993 ,  H04L27/26 ,  H04L27/2647

Abstract: Disclosed in an embodiment of the disclosure is an interference rejection combining (IRC) method supporting transmit diversity, in which an N*N interference and noise covariance matrix corresponding to one subcarrier is generated from signals, in a transmit diversity mode, received at cell reference signal (CRS) resource positions via N receiving antennas, where N is greater than or equal to 3; Cholescy decomposition and upper triangular matrix inversion is performed on the N*N interference and noise covariance matrix to obtain an N*N block matrix; the N*N block matrix is expanded to a 2N*2N noise whitening matrix; and the received signals and channel estimation values are whitened according to the noise whitening matrix, and the whitened received signals and channel estimation values used to obtain a minimum mean square error-IRC (MMSE-IRC) processing result. Also disclosed are an IRC device supporting the transmit diversity, and a computer storage medium.

公开(公告)号：EP2642706B1

公开(公告)日：2017-10-04

申请号：EP12160570.3

申请日：2012-03-21

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Andgart, Niklas ,  Kamuf, Matthias ,  Nordström, Fredrik

IPC: H04L5/00 ,  H04L1/20 ,  H04L25/02 ,  H04L25/03 ,  H04L25/06 ,  H04B7/0413 ,  H04B7/08 ,  H04L1/06

CPC classification number: H04L25/0256 ,  H04B7/0413 ,  H04B7/0854 ,  H04B7/086 ,  H04L1/06 ,  H04L1/206 ,  H04L5/0023 ,  H04L25/0224 ,  H04L25/03318 ,  H04L25/03331 ,  H04L25/03891 ,  H04L25/067

Abstract: The invention relates to a method 50; 100 performed in a user equipment 2 for estimating channel quality. The user equipment 2 is adapted to operate in a multiple input multiple output, MIMO, mode in a communication system 1 comprising a base station node 3 supporting MIMO and serving the user equipment 2. The method 50; 100 comprises: receiving 51; 110, from the base station node 3, a reference signal; performing 52; 120 joint demodulation of the reference signal, thereby obtaining soft values; and generating 53; 130, 140, 150 the channel quality using the soft values. The invention also relates to a user equipment, computer programs and computer program products.

Abstract translation: 本发明涉及一种方法50; 100在用户设备2中执行以估计信道质量。 用户设备2适于在通信系统1中以多输入多输出MIMO模式操作，该通信系统1包括支持MIMO并为用户设备2提供服务的基站节点3。 100包括：接收51; 110，从基站节点3接收参考信号; 表演52; 120参考信号的联合解调，从而获得软值; 并生成53; 130,140,​​150使用软值来确定信道质量。 本发明还涉及用户设备，计算机程序和计算机程序产品。

公开(公告)号：EP3174232A4

公开(公告)日：2017-08-16

申请号：EP14881983

申请日：2014-12-01

Applicant: SANECHIPS TECH CO LTD

Inventor： WU GANG

IPC: H04L1/06 ,  H04B7/04 ,  H04L25/03

CPC classification number: H04B7/0845 ,  H04B7/0413 ,  H04B7/0854 ,  H04L1/0054 ,  H04L1/06 ,  H04L25/03

Abstract: The disclosure discloses a path detection method including after obtaining an equalizing signal of a received signal, Maximum Likelihood (ML) path detection and ML complementary set path detection are performed on the equalizing signal according to the pre-set maximum number of reserved nodes and maximum number of expanded branches of each layer; in the process of the detections, an accumulated path measurement value is calculated after finishing the search of each layer and each path, and the accumulated path measurement value is compared with a pre-set search measurement threshold; when the accumulated path measurement value is less than the search measurement threshold, the search of this path is continued; otherwise the search of this path is finished and the search of the next path is started until all the paths are searched. The disclosure also discloses a path detection device, Sphere Decoding (SD) detection device and computer storage medium.

Abstract translation: 本发明公开了一种路径检测方法，包括：在获得接收信号的均衡信号后，根据预先设置的预留节点的最大数量和最大值，对均衡信号进行最大似然（ML）路径检测和ML补集路径检测 每层扩展分支的数量; 在检测过程中，在完成各层和各路径的搜索后计算累计路径测量值，并将累计路径测量值与预设搜索测量门限进行比较; 当累积路径测量值小于搜索测量阈值时，继续搜索该路径; 否则完成该路径的搜索并开始搜索下一路径，直到搜索到所有路径。 本发明还公开了一种路径检测装置，球形解码（SD）检测装置和计算机存储介质。

公开(公告)号：EP2633635B1

公开(公告)日：2017-08-09

申请号：EP10779062.8

申请日：2010-10-29

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： LINDQVIST, Fredrik ,  HUSS, Fredrik

IPC: H04B7/08

CPC classification number: H04B7/0871 ,  H04B7/0854 ,  H04B17/345

Abstract: In a method of mitigating interference for received signals in a communication system, receiving S10 a transmitted signal via at least two antenna elements, estimating S20 a channel for the received signals, and estimating S30 a disturbance covariance matrix based on the channel estimate, which estimated disturbance covariance matrix represents received interference plus noise of the received signals. Subsequently, adapting S40 the estimated covariance matrix by enhancing the diagonal elements of the covariance matrix to provide an enhanced covariance matrix, to reduce the spread in eigenvalues of the covariance matrix, and thereby improve the robustness of the covariance matrix. Finally, selectively S50 using IRC and/or MRC to mitigate interference of the received signals, based on at least the channel estimate and on the enhanced covariance matrix, to provide a received signal with improved quality on channels with Doppler frequency.

Abstract translation: 在用于减轻通信系统中接收信号的干扰的方法中，经由至少两个天线元件接收S10发射信号，估计S20接收信号的信道，以及基于信道估计估计S30干扰协方差矩阵， 干扰协方差矩阵表示接收到的信号的接收到的干扰加噪声。 随后，通过增强协方差矩阵的对角线元素以适应S40估计的协方差矩阵以提供增强的协方差矩阵，以减少协方差矩阵的特征值中的扩展，从而提高协方差矩阵的鲁棒性。 最后，基于至少信道估计和增强协方差矩阵，使用IRC和/或MRC选择性地S50来减轻接收信号的干扰，以提供具有多普勒频率的信道上的改善质量的接收信号。

公开(公告)号：EP3200357A1

公开(公告)日：2017-08-02

申请号：EP16153704.8

申请日：2016-02-01

Applicant: Tarana Wireless, Inc.

Inventor： Branlund, Dale

IPC: H04B7/06 ,  H01Q1/24 ,  H01Q21/29 ,  H01Q25/00 ,  H01Q3/26 ,  H04B7/10 ,  H04B7/08 ,  G01S7/28 ,  H04L27/26 ,  H04W92/04

CPC classification number: H04B7/0695 ,  H01Q1/246 ,  H01Q3/2617 ,  H04B7/0617 ,  H04B7/0697 ,  H04B7/0851 ,  H04B7/0854 ,  H04B7/10 ,  H04L27/261

Abstract: A non-line of sight backhaul system and method are described that provides self alignment of the antennas beams of the wireless radios of the system, that provides robust operation in licensed and unlicensed frequency bands, that facilitates the use of a reduced number of frequency channels from M to 1 and that enables operation in a non-line of sight (NLOS) propagation environment.

Abstract translation: 描述了一种非视线回程系统和方法，其提供了系统的无线无线电的天线波束的自对准，其在许可的和未许可的频带中提供稳健的操作，这便于使用减少数量的频率信道 从M到1，并且能够在非视线（NLOS）传播环境中操作。

公开(公告)号：EP2181508B1

公开(公告)日：2017-07-12

申请号：EP08779456.6

申请日：2008-07-16

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： CAIRNS, Douglas A

IPC: H04B1/712 ,  H04B7/04 ,  H04L1/20 ,  H04B7/08 ,  H04L1/00 ,  H04B1/7107

CPC classification number: H04B7/0854 ,  H04B1/7107 ,  H04B1/712 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/20

Abstract: Signal quality estimation and demodulation are tailored to the received signal quality. According to one embodiment, a received signal is processed by determining a first set of combining weights based on a first impairment covariance estimate derived assuming a low signal quality environment. A second set of combining weights is determined based on a second impairment covariance estimate derived assuming a high signal quality environment. A metric is determined corresponding to the difference between symbol estimates derived from the second set of combining weights and hard symbol decisions. The received signal is demodulated based on the second set of combining weights if the metric satisfies a threshold indicating high signal quality and otherwise based on the first set of combining weights.

Abstract translation: 信号质量估计和解调是针对接收信号的质量而定制的。 根据一个实施例，通过基于假定低信号质量环境导出的第一损害协方差估计来确定第一组合权重来处理接收到的信号。 基于假设高信号质量环境导出的第二损害协方差估计来确定第二组合权重。 度量是对应于从第二组合权重和硬符号判定导出的符号估计之间的差异而确定的。 如果度量满足指示高信号质量的阈值并且否则基于第一组合权重，则基于第二组合权重对接收到的信号进行解调。

公开(公告)号：EP2181517A4

公开(公告)日：2017-04-19

申请号：EP08724260

申请日：2008-03-19

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： JÖNGREN GEORGE

IPC: H04L1/06 ,  H04B7/08 ,  H04L25/03

CPC classification number: H04B7/0854 ,  H04L1/0606 ,  H04L1/0631 ,  H04L25/03305 ,  H04L25/03968 ,  H04L25/03993

Abstract: A user terminal [12] and method for suppressing interference associated with receiving data, via a wireless channel, from multiple antennas [14, 16] of a transmitter of interest [10]. The user terminal [12] includes an antenna [98] configured to receive an information carrying signal including at least two vectors transmitted from the transmitter of interest [10], and a processor [90] configured to generate first and second vectors, each associated with a corresponding one of the two transmitted vectors, to generate a covariance matrix [R] based on the generated first and second vectors, to process the covariance matrix [R] to have four block elements, the four block elements including first to four matrices, the third matrix being the complex conjugate of the second matrix with opposite sign and the fourth matrix being the complex conjugate of the first matrix, and to jointly decode the first and second vectors based on an inverse of the covariance matrix [R−1], to reproduce the data within the received information carrying signal.

公开(公告)号：EP2810381B1

公开(公告)日：2016-11-02

申请号：EP12867521.2

申请日：2012-11-12

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： ZHANG, Haochuan ,  SHEN, Hong ,  HU, Yang ,  XU, Wei

IPC: H04B7/06 ,  H04B7/02 ,  H04B7/04 ,  H04L5/00

CPC classification number: H04W72/0446 ,  H04B7/024 ,  H04B7/043 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/046 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0842 ,  H04B7/0854 ,  H04L5/0035 ,  H04L25/0204 ,  H04L25/03949

Abstract: A user equipment, UE, (300), a radio base station, RBS, (400) and a respective method (100) and (200) therein for joint transmit and receive procedure are provided. The method (100) in the UE comprises receiving (110) at a time slot n, a first transmission from the RBS, the transmission comprising a first pre-coded symbol; and estimating (120) a real channel referring to a transfer function of the channel and an effective channel referring to the real channel adjusted by transmission weights for the received first transmission. The method further comprises determining (130) a combining vector based on the effective channel, and determining (140) a feedback vector based on the combining vector and the real channel. The method comprises transmitting (150) the feedback vector to the RBS, to be used by the RBS for determining an SLNR pre-coding vector for a second transmission to the UE in a subsequent time slot.