公开(公告)号：US08498640B2

公开(公告)日：2013-07-30

申请号：US13076599

申请日：2011-03-31

Applicant: Andres Reial ,  Niklas Andgart ,  Bengt Lindoff ,  Lennart Moren ,  Anders Wallén

Inventor： Andres Reial ,  Niklas Andgart ,  Bengt Lindoff ,  Lennart Moren ,  Anders Wallén

IPC: H04W4/00

CPC classification number: H04W48/16 ,  H04W88/06

Abstract: Methods and apparatus are provided for detecting the radio access technology (RAT) employed in a received signal prior to performing a cell search. The RAT detection method may be used to identify the most likely RAT employed for each candidate frequency identified in an initial frequency scan. Once the most likely RAT is identified, the mobile communication device can then attempt synchronization according to the procedures for the most likely RAT. Identifying the RAT prior to the cell search reduces the number of synchronization attempts and, consequently, the time needed to perform the cell search.

Abstract translation: 提供了用于在执行小区搜索之前检测在接收信号中采用的无线电接入技术（RAT）的方法和装置。 RAT检测方法可以用于识别在初始频率扫描中识别的每个候选频率所采用的最可能的RAT。 一旦识别出最可能的RAT，则移动通信设备然后可以根据最可能的RAT的过程尝试同步。 在小区搜索之前识别RAT减少了同步尝试的次数，因此减少了进行小区搜索所需的时间。

公开(公告)号：US20130077578A1

公开(公告)日：2013-03-28

申请号：US13451076

申请日：2012-04-19

Applicant: Yi-Pin Eric WANG ,  Andres Reial ,  Edgar Ramos ,  Stefan Parkvall ,  Stephen Grant

Inventor： Yi-Pin Eric WANG ,  Andres Reial ,  Edgar Ramos ,  Stefan Parkvall ,  Stephen Grant

IPC: H04W72/04

CPC classification number: H04W72/1278 ,  H04B1/71075 ,  H04B1/712 ,  H04W72/082

Abstract: In MU-MIMO scenarios, a target mobile terminal can be exposed to data streams intended for other mobile terminals. If the target mobile terminal is capable of interference cancellation, then a serving base station can provide the target mobile terminal with interference information so that the target mobile terminal can efficiently cancel interferences due to these interfering data streams. The interference information includes one or more configuration information, each of which characterizes a related interfering data stream. The serving base station provides the interference information over one or more radio resources that are exclusive allocated to the target mobile terminal or are allocated for common listening. The serving base station exchanges configuration information with neighboring base stations over inter-BS links. The inter-BS links use resources that are different from the radio resources used between the base stations and the mobile terminals.

Abstract translation: 在MU-MIMO场景中，目标移动终端可以暴露给旨在用于其他移动终端的数据流。 如果目标移动终端能够进行干扰消除，则服务基站可以向目标移动终端提供干扰信息，使得目标移动终端可以有效地消除由于这些干扰数据流引起的干扰。 干扰信息包括一个或多个配置信息，每个配置信息表征相关的干扰数据流。 服务基站通过专用于目标移动终端的一个或多个无线电资源提供干扰信息，或者被分配用于共同收听。 服务基站通过BS间链路与相邻基站交换配置信息。 BS间链路使用与基站和移动终端之间使用的无线电资源不同的资源。

公开(公告)号：US20120300754A1

公开(公告)日：2012-11-29

申请号：US13503898

申请日：2010-10-22

Applicant: Anders Rosenqvist ,  Bengt Lindoff ,  Andres Reial

Inventor： Anders Rosenqvist ,  Bengt Lindoff ,  Andres Reial

IPC: H04W72/04

CPC classification number: H04W72/1268 ,  H04B7/024 ,  H04B7/0452

Abstract: A method is disclosed of scheduling up-link transmissions for a number of terminals of a wireless communication system into a number of groups, wherein each group comprises terminals intended for simultaneous up-link transmission during a respective period of time. A subset metric may be calculated for each of a number of subsets of terminals based on transmissions received from the terminals of the subset. The subset metric is indicative of a simultaneous transmission suitability measure for the terminals of the subset. The subsets may be processed in subset metric order, starting with the subset having a subset metric indicating a least suitability metrics for of simultaneous transmission. During the processing, each terminal of the subset that is not already scheduled in a group may be scheduled in a group that does not already comprise another terminal of the subset. Information indicative of the period of time during which a scheduled terminal is intended to transmit may be transmitted to each of the scheduled terminals. Corresponding computer program product, scheduler and arrangement are also disclosed.

Abstract translation: 公开了一种将无线通信系统的多个终端的上行链路传输调度为多个组的方法，其中每个组包括旨在在相应时间段期间同步上行链路传输的终端。 可以基于从子集的终端接收的传输来为终端的多个子集中的每一个计算子集度量。 子集度量表示对于子集的终端的同时传输适应性度量。 可以以子集度量顺序来处理子集，从具有指示用于同时传输的最小适用性度量的子集度量的子集开始。 在处理期间，尚未在组中调度的子集的每个终端可以在尚未包括该子集的另一个终端的组中进行调度。 可以向每个调度的终端发送指示预定的终端要发送的时间段的信息。 还公开了相应的计算机程序产品，调度器和布置。

公开(公告)号：US08275074B2

公开(公告)日：2012-09-25

申请号：US12371971

申请日：2009-02-17

Applicant: Andres Reial ,  Bengt Lindoff

Inventor： Andres Reial ,  Bengt Lindoff

IPC: H03D1/00

CPC classification number: H04L27/265 ,  H04J11/0063 ,  H04L25/03159 ,  H04L27/2662

Abstract: A received OFDM signal is processed to determine a plurality of reference delays, which may include the path delays of a multipath channel. The effective channel estimates corresponding to each reference delay are determined, as is the covariance of the ISI and noise components observed at each delay. Combining weights resulting in maximum post-combining SINR are determined for all subcarriers. A corresponding plurality of FFTs is applied to the incoming sample stream, one at each of the reference delays. The individual subcarriers from each FFT output are then combined using the combining weights. This produces a single FFT output with suppressed ISI, which is used in further processing.

Abstract translation: 处理接收的OFDM信号以确定多个参考延迟，其可以包括多径信道的路径延迟。 确定对应于每个参考延迟的有效信道估计，以及在每个延迟时观察到的ISI和噪声分量的协方差。 为所有子载波确定导致最大后组合SINR的权重。 将相应的多个FFT应用于输入的采样流，每个参考延迟中的一个。 然后使用组合权重组合来自每个FFT输出的各个子载波。 这产生具有抑制ISI的单个FFT输出，用于进一步处理。

公开(公告)号：US08144749B2

公开(公告)日：2012-03-27

申请号：US12198973

申请日：2008-08-27

Applicant: Douglas A. Cairns ,  Elias Jonsson ,  Anders Rosenqvist ,  Andres Reial ,  Stephen Grant

Inventor： Douglas A. Cairns ,  Elias Jonsson ,  Anders Rosenqvist ,  Andres Reial ,  Stephen Grant

IPC: H04B1/707 ,  H04L1/06

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: With a nonparametric G-Rake receiver, combining weights may be determined using a nonparametric mechanism in multiple-input, multiple-output (MIMO) scenarios. In an example embodiment, a method for a receiving device having a nonparametric G-Rake receiver entails calculating an impairment covariance matrix and determining combining weights. More specifically, the impairment covariance matrix is calculated based on a pilot channel using a nonparametric mechanism in a MIMO scenario in which a code-reuse interference term exists. The combining weights are determined for the nonparametric G-Rake receiver responsive to the impairment covariance matrix and by accounting for the code-reuse interference term.

Abstract translation: 使用非参数G-Rake接收机，可以使用多输入多输出（MIMO）场景中的非参数机制来确定组合权重。 在示例实施例中，具有非参数G-Rake接收机的接收设备的方法需要计算损害协方差矩阵并确定组合权重。 更具体地说，在存在码重用干扰项的MIMO场景中，基于使用非参数机制的导频信道来计算损害协方差矩阵。 针对非参数G-Rake接收机响应于损害协方差矩阵并通过计算代码重用干扰项来确定组合权重。

公开(公告)号：US07894555B2

公开(公告)日：2011-02-22

申请号：US11832695

申请日：2007-08-02

Applicant: Bengt Lindoff ,  Andres Reial

Inventor： Bengt Lindoff ,  Andres Reial

IPC: H03D1/04 ,  H04B1/707

CPC classification number: H04B1/707 ,  H04B1/123 ,  H04B1/30 ,  H04B2201/709727 ,  H04L25/0212 ,  H04L27/3863 ,  H04L2027/0016

Abstract: A WCDMA receiver performs baseband suppression of the image signal component caused by IQ imbalance. An IQ imbalance image scaling factor is computed from conventional channel estimates and estimates of the IQ imbalance image channel, the latter computed using a conjugated scrambling sequence as the reference sequence for despreading. An IQ imbalance image estimate is obtained by scaling the complex conjugate of the received signal by the IQ imbalance image scaling factor, and is subtracted from the input signal prior to applying traditional baseband demodulation algorithms.

Abstract translation: WCDMA接收机对IQ不平衡引起的图像信号分量进行基带抑制。 从常规信道估计和IQ不平衡图像信道的估计计算IQ不平衡图像缩放因子，后者使用共轭加扰序列作为解扩的参考序列计算。 通过将接收信号的复共轭缩放IQ平衡图像缩放因子，获得IQ不平衡图像估计，并且在应用传统的基带解调算法之前从输入信号中减去IQ不平衡图像估计。

公开(公告)号：US20100284443A1

公开(公告)日：2010-11-11

申请号：US12435539

申请日：2009-05-05

Applicant: Anders Rosenqvist ,  Johan Nilsson ,  Andres Reial

Inventor： Anders Rosenqvist ,  Johan Nilsson ,  Andres Reial

IPC: H04B1/707 ,  H04L27/06

CPC classification number: H04L25/0202 ,  H04L25/0236

Abstract: A user terminal is configured to generate supplemental pilot symbols from data symbols transmitted to other user terminals meeting a predetermined reliability criterion. The supplemental pilot symbols can be used for channel estimation, covariance estimation, CQI estimation, or other purposes.

Abstract translation: 用户终端被配置为从满足预定可靠性标准的其他用户终端发送的数据符号生成补充导频符号。 补充导频符号可用于信道估计，协方差估计，CQI估计或其他目的。

公开(公告)号：US07822101B2

公开(公告)日：2010-10-26

申请号：US11767905

申请日：2007-06-25

Applicant: Andres Reial

Inventor： Andres Reial

IPC: H04L27/30

CPC classification number: H04B1/712 ,  H04B1/7103 ,  H04B2201/70702 ,  H04B2201/70707 ,  H04B2201/709727

Abstract: According to methods and apparatus taught herein, a parametric model of received signal impairment correlations includes a parametric model term that accounts for a dominant receiver but does not result in any significant increase in parametric modeling complexity. In more detail, the parametric model models the dominant interferer as a spatial interferer, which is hypothesized as a point source of interference emanating along single-path channels to each of two or more receiver antennas. The dominant interferer thus is represented in terms of its spatial correlation across receiver antennas. The dominant interferer model term may be included in an overall model fitting process, or it may be fitted separately. Regardless, the spatial modeling approach taught herein may be used for WCDMA and other systems, and may be embodied in essentially any type of linear equalizer receiver structure.

Abstract translation: 根据本文教导的方法和装置，接收信号损害相关的参数模型包括考虑显性接收机但不导致参数建模复杂度的任何显着增加的参数模型项。 更详细地，参数模型将主要干扰源建模为空间干扰源，其被假设为沿着沿着单路径信道发送到两个或更多个接收机天线中的每一个的干扰点。 因此，显着的干扰源就是通过接收机天线的空间相关来表示的。 主要的干扰源模型项可以被包括在整体模型拟合过程中，或者可以单独地拟合。 无论如何，本文教导的空间建模方法可以用于WCDMA和其他系统，并且可以基本上体现在任何类型的线性均衡器接收机结构中。

公开(公告)号：US07746961B2

公开(公告)日：2010-06-29

申请号：US11279287

申请日：2006-04-11

Applicant: Andres Reial ,  Peter Malm

Inventor： Andres Reial ,  Peter Malm

IPC: H04L27/06

CPC classification number: H04B1/70755 ,  H04B1/7077

Abstract: Hypothesis tests, such as maximum likelihood detections, are executed on symbol sequences received by, for example, a user equipment (UE) in a communication system. The hypothesis tester checks a received sequence against a group of predetermined sequences that possibly could have been sent to the UE. For received sequences that are matched or not matched by the hypothesis tester with high confidence, complete decoding, for example, with a Viterbi decoder, is not necessary. Instead, complete decoding is used as a “tie-breaker” for those sequences which the hypothesis tester cannot match or not match with desired confidence levels.

Abstract translation: 在例如通信系统中的用户设备（UE）接收的符号序列上执行诸如最大似然检测的假设检验。 假设测试者根据可能已经发送给UE的一组预定序列来检查接收到的序列。 对于具有高置信度的假设检验者匹配或不匹配的接收序列，例如使用维特比解码器，完全解码是不必要的。 相反，完全解码被用作假设检验者不能匹配或不符合期望置信水平的那些序列的“断路器”。

公开(公告)号：US20100159862A1

公开(公告)日：2010-06-24

申请号：US12337964

申请日：2008-12-18

Applicant: Andres Reial ,  Bo Bernhardsson ,  Xiaohui Wang

Inventor： Andres Reial ,  Bo Bernhardsson ,  Xiaohui Wang

IPC: H04B1/06 ,  H04B1/16

CPC classification number: H03J7/02

Abstract: The automatic frequency correction value applied by a receiver is altered to minimize long-term drift of a path delay profile. In one embodiment, the phase or timing error resulting from constant frequency corrections is accumulated, and an estimated frequency correction value is selectively quantized into an actual frequency correction value in response to the accumulated phase/timing error. The quantized value above or below the estimate is selected to minimize the accumulated phase/timing error that gives rise to path delay profile drift. In another embodiment, a timing circuit measures the instantaneous path delay profile drift incurred with each frequency correction, and integrates the instantaneous drift measurements over time to yield a path delay profile drift. The drift (or its rate of change) is then used to adjust a frequency correction value so as to minimize the drift.

Abstract translation: 由接收机施加的自动频率校正值被改变以最小化路径延迟分布的长期漂移。 在一个实施例中，累积了由恒定频率校正引起的相位或定时误差，并且响应于累积的相位/定时误差，将估计频率校正值选择性地量化为实际频率校正值。 选择高于或低于估计的量化值以最小化引起路径延迟分布漂移的累积相位/定时误差。 在另一个实施例中，定时电路测量每个频率校正引起的瞬时路径延迟分布漂移，并且随着时间的推移积分瞬时漂移测量值，以产生路径延迟分布漂移。 然后使用漂移（或其变化率）来调整频率校正值，以便使漂移最小化。