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公开(公告)号：US20120027048A1
公开(公告)日：2012-02-02
申请号：US13145789
申请日：2010-01-20
IPC分类号： H04B1/707
CPC分类号： H04L25/03006 , H04L25/0216 , H04L2025/03426
摘要： A method of delay spread compensation, suitable for use in a communication device a having plurality of receiver antennas, is disclosed. The method comprises receiving a plurality of signals, each via a respective antenna, wherein each signal comprises a signal component corresponding to a transmitted signal, and wherein each received signal experiences a respective channel impulse response having a corresponding delay spread; determining estimates of each of the channel impulse responses; calculating post-coding characteristics based on the estimates of the channel impulse responses; and post-coding the plurality of received signals using the post-coding characteristics to produce at least a first delay spread compensated signal. Corresponding computer program product, processing arrangement and communication device are also disclosed.
摘要翻译： 公开了适用于具有多个接收机天线的通信设备中的延迟扩展补偿方法。 该方法包括：经由相应的天线接收多个信号，其中每个信号包括对应于发射信号的信号分量，并且其中每个接收信号经历具有相应延迟扩展的相应信道脉冲响应; 确定每个信道脉冲响应的估计; 基于信道脉冲响应的估计来计算后编码特性; 以及使用所述后编码特性对所述多个接收信号进行后编码，以产生至少第一延迟扩展补偿信号。 还公开了相应的计算机程序产品，处理布置和通信设备。
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公开(公告)号：US08861572B2
公开(公告)日：2014-10-14
申请号：US13145789
申请日：2010-01-20
CPC分类号： H04L25/03006 , H04L25/0216 , H04L2025/03426
摘要： A method of delay spread compensation, suitable for use in a communication device a having plurality of receiver antennas, is disclosed. The method comprises receiving a plurality of signals, each via a respective antenna, wherein each signal comprises a signal component corresponding to a transmitted signal, and wherein each received signal experiences a respective channel impulse response having a corresponding delay spread; determining estimates of each of the channel impulse responses; calculating post-coding characteristics based on the estimates of the channel impulse responses; and post-coding the plurality of received signals using the post-coding characteristics to produce at least a first delay spread compensated signal. Corresponding computer program product, processing arrangement and communication device are also disclosed.
摘要翻译： 公开了适用于具有多个接收机天线的通信设备中的延迟扩展补偿方法。 该方法包括：经由相应的天线接收多个信号，其中每个信号包括对应于发射信号的信号分量，并且其中每个接收信号经历具有相应延迟扩展的相应信道脉冲响应; 确定每个信道脉冲响应的估计; 基于信道脉冲响应的估计来计算后编码特性; 以及使用所述后编码特性对所述多个接收信号进行后编码，以产生至少第一延迟扩展补偿信号。 还公开了相应的计算机程序产品，处理布置和通信设备。
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3.发明申请Detecting a Transmitted OFDM Signal in a Receiver Having at Least Two Receiver Branches 有权在具有至少两个接收器分支的接收机中检测传输的OFDM信号公开(公告)号：US20130028354A1
公开(公告)日：2013-01-31
申请号：US13578123
申请日：2011-02-03
申请人： Bengt Lindoff , Bo Lincoln , Fredrik Nordström
发明人： Bengt Lindoff , Bo Lincoln , Fredrik Nordström
IPC分类号： H04L27/28
CPC分类号： H04L27/2647 , H04B7/0845 , H04L25/0202 , H04L27/2666
摘要： A transmitted OFDM signal is detected in a receiver of a wireless communication system. The receiver has at least two receiver branches, each comprising an antenna, a front end receiver, a Discrete Fourier Transform unit, and a channel estimator. The receiver further comprises a detector for detecting received data symbols. The method comprises the steps of determining a system bandwidth associated with the transmitted signal; comparing the determined system bandwidth with a predetermined value; determining, if the system bandwidth is lower than the predetermined value, channel estimates separately for each branch, and detecting received data symbols from the received signals and corresponding channel estimates; and calculating, if the system bandwidth is higher than the predetermined value, a weighted sum of signals from each branch, determining a combined channel estimate, and detecting received data symbols from the weighted sum and the combined channel estimate.
摘要翻译： 在无线通信系统的接收机中检测到发送的OFDM信号。 接收器具有至少两个接收器分支，每个接收器分支包括天线，前端接收器，离散傅立叶变换单元和信道估计器。 接收机还包括用于检测接收到的数据符号的检测器。 该方法包括以下步骤：确定与发射信号相关联的系统带宽; 将所确定的系统带宽与预定值进行比较; 确定如果系统带宽低于预定值，则针对每个分支分别进行信道估计，并且从接收到的信号和对应的信道估计中检测接收到的数据符号; 并且如果系统带宽高于预定值，则计算来自每个分支的信号的加权和，确定组合的信道估计，以及从加权和和组合的信道估计中检测接收到的数据符号。
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4.发明授权Detecting a transmitted OFDM signal in a receiver having at least two receiver branches 有权在具有至少两个接收器分支的接收机中检测发送的OFDM信号公开(公告)号：US08953698B2
公开(公告)日：2015-02-10
申请号：US13578123
申请日：2011-02-03
申请人： Bengt Lindoff , Bo Lincoln , Fredrik Nordström
发明人： Bengt Lindoff , Bo Lincoln , Fredrik Nordström
CPC分类号： H04L27/2647 , H04B7/0845 , H04L25/0202 , H04L27/2666
摘要： A transmitted OFDM signal is detected in a receiver of a wireless communication system. The receiver has at least two receiver branches, each comprising an antenna, a front end receiver, a Discrete Fourier Transform unit, and a channel estimator. The receiver further comprises a detector for detecting received data symbols. The method comprises the steps of determining a system bandwidth associated with the transmitted signal; comparing the determined system bandwidth with a predetermined value; determining, if the system bandwidth is lower than the predetermined value, channel estimates separately for each branch, and detecting received data symbols from the received signals and corresponding channel estimates; and calculating, if the system bandwidth is higher than the predetermined value, a weighted sum of signals from each branch, determining a combined channel estimate, and detecting received data symbols from the weighted sum and the combined channel estimate.
摘要翻译： 在无线通信系统的接收机中检测到发送的OFDM信号。 接收器具有至少两个接收器分支，每个接收器分支包括天线，前端接收器，离散傅立叶变换单元和信道估计器。 接收机还包括用于检测接收到的数据符号的检测器。 该方法包括以下步骤：确定与发射信号相关联的系统带宽; 将所确定的系统带宽与预定值进行比较; 确定如果系统带宽低于预定值，则针对每个分支分别进行信道估计，并且从接收到的信号和对应的信道估计中检测接收到的数据符号; 以及如果系统带宽高于预定值，则计算来自每个分支的信号的加权和，确定组合信道估计，以及从加权和和组合信道估计检测接收到的数据符号。
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5.发明申请Operation of User Equipment When Control and Data Information are Supplied by Different Radio Units 有权控制和数据信息由不同的无线电单元提供时，用户设备的操作公开(公告)号：US20120219094A1
公开(公告)日：2012-08-30
申请号：US13033722
申请日：2011-02-24
申请人： Bengt Lindoff , Fredrik Nordström
发明人： Bengt Lindoff , Fredrik Nordström
CPC分类号： H04L27/2657 , H04L5/005 , H04L5/0051 , H04L25/0204 , H04L25/0224 , H04L27/2662 , H04L27/2672 , H04L27/2675 , H04L27/2695 , H04W56/001 , H04W56/0035
摘要： A receiver operates in a mobile communication system that comprises first node and second nodes, the first and second nodes transmitting common control signals and dedicated data signals, respectively. The receiver determines a first timing rotation and/or a first frequency rotation of the common control signals and a second timing rotation and/or a second frequency rotation of the dedicated data signals. The receiver determines a first and/or second difference, wherein the first difference is a difference between the first timing rotation of the common control signals and the second timing rotation of the dedicated data signals and the second difference is a difference between the first frequency rotation of the common control signals and the second frequency rotation of the dedicated data signals. An adapted timing of dedicated data signals is produced based on the first and/or second differences, and the adapted timing is used to receive dedicated data signals.
摘要翻译： 接收机在包括第一节点和第二节点的移动通信系统中操作，第一和第二节点分别发送公共控制信号和专用数据信号。 接收机确定公共控制信号的第一定时旋转和/或第一频率旋转以及专用数据信号的第二定时旋转和/或第二频率旋转。 接收机确定第一和/或第二差异，其中第一差是公共控制信号的第一定时旋转和专用数据信号的第二定时旋转之间的差，第二差是第一频率旋转 的公共控制信号和专用数据信号的第二频率旋转。 基于第一和/或第二差产生专用数据信号的适应定时，并且使用适配的定时来接收专用数据信号。
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公开(公告)号：US20110300819A1
公开(公告)日：2011-12-08
申请号：US13140009
申请日：2009-12-14
申请人： Fredrik Nordström , Bengt Lindoff
发明人： Fredrik Nordström , Bengt Lindoff
IPC分类号： H04W88/02
CPC分类号： H04L5/0032 , H04B1/10 , H04L25/0204 , H04L25/0228 , H04L27/2665 , H04W56/001
摘要： In a method and a mobile communications receiver for processing signals from a first cell and a second cell a timing of the signal from the first cell and the second cell is obtained. A timing difference (δ) between the timings of signals from the first and the second cell is determined and based on that a timing (κ) for a window for discrete Fourier transform, DFT, processing is adjusted. DFT processing of the signals using the timing (κ) of the DFT window is then performed.
摘要翻译： 在用于处理来自第一小区和第二小区的信号的方法和移动通信接收机中，获得来自第一小区和第二小区的信号的定时。 确定来自第一和第二小区的信号的定时之间的定时差（δ），并且基于用于离散付里叶变换的窗口的DFT处理的定时（＆kgr）进行调整。 然后执行使用DFT窗口的定时（＆kgr）的信号的DFT处理。
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7.发明申请Determining a Frequency Error in a Receiver of a Wireless Communications System 有权确定无线通信系统的接收机中的频率误差公开(公告)号：US20100135423A1
公开(公告)日：2010-06-03
申请号：US12598613
申请日：2008-05-05
CPC分类号： H04L27/2657 , H04L27/2613 , H04L27/2675
摘要： A frequency error of received signals in an OFDM receiver of a wireless communications system is determined. Symbols of a given duration are transmitted as cells on sub-carrier frequencies; and some of the cells are pilot cells modulated with reference information. The method comprises the steps of selecting at least three pilot cells (p0, p1, p2) from different symbols and different sub-carriers; determining the symbol and the sub-carrier on which each pilot cell is transmitted; determining for each pilot cell a phase difference between received and generated signals; calculating therefrom a change in phase difference (Φx) caused by the frequency error; and calculating the frequency error from the calculated change in phase difference (Φx). In this way a receiver capable of determining a frequency error also in situations where only a short data burst, such as a single resource block, is available for the estimation is provided.
摘要翻译： 确定无线通信系统的OFDM接收机中的接收信号的频率误差。 给定持续时间的符号作为小区在子载波频率上发送; 并且一些小区是用参考信息调制的导频小区。 该方法包括从不同符号和不同子载波中选择至少三个导频小区（p0，p1，p2）的步骤; 确定发送每个导频小区的符号和子载波; 为每个导频小区确定接收和产生的信号之间的相位差; 由此计算由频率误差引起的相位差（Φx）的变化; 并根据计算的相位差变化（Φx）计算频率误差。 以这种方式，能够在只有短数据突发（例如单个资源块）可用于估计的情况下也能够确定频率误差的接收机被提供。
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公开(公告)号：US08768258B2
公开(公告)日：2014-07-01
申请号：US13140009
申请日：2009-12-14
申请人： Fredrik Nordström , Bengt Lindoff
发明人： Fredrik Nordström , Bengt Lindoff
CPC分类号： H04L5/0032 , H04B1/10 , H04L25/0204 , H04L25/0228 , H04L27/2665 , H04W56/001
摘要： In a method and a mobile communications receiver for processing signals from a first cell and a second cell a timing of the signal from the first cell and the second cell is obtained. A timing difference (δ) between the timings of signals from the first and the second cell is determined and based on that a timing (κ) for a window for discrete Fourier transform, DFT, processing is adjusted. DFT processing of the signals using the timing (κ) of the DFT window is then performed.
摘要翻译： 在用于处理来自第一小区和第二小区的信号的方法和移动通信接收机中，获得来自第一小区和第二小区的信号的定时。 确定来自第一和第二小区的信号的定时之间的定时差（δ），并且基于用于离散付里叶变换的窗口的DFT处理的定时（＆kgr）进行调整。 然后执行使用DFT窗口的定时（＆kgr）的信号的DFT处理。
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公开(公告)号：US08687745B2
公开(公告)日：2014-04-01
申请号：US12134243
申请日：2008-06-06
申请人： Bengt Lindoff , Matthias Kamuf , Fredrik Nordström
发明人： Bengt Lindoff , Matthias Kamuf , Fredrik Nordström
CPC分类号： H04L1/0091 , H04L1/0038 , H04L1/0046
摘要： According to the teachings presented herein, a method and apparatus provide a reduced search space for blindly decoding a message included in a signal received at a communication receiver, where the message has an unknown format. Improving blind detection efficiency in this manner offers numerous advantages, including but not limited to lower power consumption through reduced processing overhead, and lower power consumption through expanded sleep opportunities. As a non-limiting example, the communication receiver comprises a mobile station configured for operation according to Long Term Evolution (LTE) standards, as promulgated by the 3GPP for E-UTRA systems, where the mobile station is configured to reduce a search space of DCI message decoding by determining message format likelihoods and blindly decoding a received DCI message based on the message format likelihoods.
摘要翻译： 根据本文呈现的教导，一种方法和装置提供减少的搜索空间，用于盲目地解码包括在通信接收器处接收的信号中的消息，其中消息具有未知格式。 以这种方式提高盲目检测效率提供了许多优点，包括但不限于通过减少处理开销降低功耗，并通过扩展的睡眠机会降低功耗。 作为非限制性示例，通信接收机包括被配置用于根据长期演进（LTE）标准进行操作的移动台，如3GPP针对E-UTRA系统所公布的，其中移动台被配置为减少搜索空间 通过确定消息格式似然性并基于消息格式可能性对接收的DCI消息进行盲解码来进行DCI消息解码。
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公开(公告)号：US20120051464A1
公开(公告)日：2012-03-01
申请号：US12869816
申请日：2010-08-27
CPC分类号： H04L27/2647 , H04L25/03292 , H04L25/03318 , H04L2025/03414
摘要： Decoding a received Orthogonal Frequency Division Multiplex (OFDM) signal that occupies a first set of subcarriers in a radio frequency spectrum includes ascertaining an interference model that represents interference occurring in the first set of subcarriers caused by a transmitted OFDM signal that occupies a second set of subcarriers in the radio frequency spectrum. A set of scaled soft values is produced that represents information conveyed by the received OFDM signal over the first set of subcarriers, wherein each scaled soft value in the set of scaled soft values corresponds to a respective one of the subcarriers in the first set of subcarriers, and wherein a scaling amount applied to each of the scaled soft values is based on a corresponding level of interference in said respective one of the subcarriers as indicated by the interference model. A decoding process is performed that generates detected data from the scaled soft values.
摘要翻译： 解码在无线电频谱中占用第一组子载波的接收的正交频分多路复用（OFDM）信号包括确定干扰模型，其表示由发送的OFDM信号引起的第一组子载波中所发生的干扰，所述OFDM信号占用第二组 无线电频谱中的子载波。 产生一组缩放的软值，其表示在第一组子载波上由接收的OFDM信号传送的信息，其中该缩放的软值集合中的每个缩放的软值对应于第一组子载波中的相应的一个子载波 ，并且其中应用于每个所述缩放的软值的缩放量基于由所述干扰模型指示的所述相应一个子载波中的相应的干扰电平。 执行从缩放的软值生成检测数据的解码处理。
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