公开(公告)号：US08050343B2

公开(公告)日：2011-11-01

申请号：US12324523

申请日：2008-11-26

申请人： Fredrik Nordström ,  Niklas Andgart ,  Bengt Lindoff

发明人： Fredrik Nordström ,  Niklas Andgart ,  Bengt Lindoff

IPC分类号： H04L27/28

CPC分类号： H04L5/0007 ,  H04L5/0042 ,  H04L27/2634 ,  H04L27/2647

摘要： A wireless communication system receiver receives and processes a signal comprising at least two component carriers carrying data scheduled to the receiver and having center frequencies spaced apart by at least one component carrier frequency difference. Each component carrier comprises a number of subcarriers spaced apart by a system subcarrier frequency spacing. A common divisor is obtained for the at least one component carrier frequency difference and the system subcarrier frequency spacing. A symbol is received on the subcarriers of the component carriers and downconverted to baseband to produce a baseband symbol. A block of padding values is inserted in the baseband symbol to produce a padded symbol. The length of the block of padding values is such that intermediate subcarriers are inserted to yield a subcarrier frequency spacing for the padded symbol equal to the common divisor. Finally the padded symbol is Fast Fourier Transform, FFT, processed.

摘要翻译： 无线通信系统接收机接收并处理包括至少两个分量载波的信号，所述至少两个分量载波携带调度到接收机的数据，并具有间隔至少一个分量载波频率差的中心频率。 每个分量载波包括通过系统子载波频率间隔间隔开的多个子载波。 获得至少一个分量载波频率差和系统子载波频率间隔的公约数。 在分量载波的子载波上接收符号并且下变频到基带以产生基带符号。 在基带符号中插入填充值块以产生填充符号。 填充值块的长度使得插入中间子载波以产生等于公约数的填充符号的子载波频率间隔。 最后，填充符号是快速傅里叶变换，FFT处理。

公开(公告)号：US08050369B2

公开(公告)日：2011-11-01

申请号：US12324381

申请日：2008-11-26

申请人： Bengt Lindoff ,  Niklas Andgart ,  Fredrik Nordström

发明人： Bengt Lindoff ,  Niklas Andgart ,  Fredrik Nordström

IPC分类号： H04B7/10

CPC分类号： H04L5/0007 ,  H04L5/0041 ,  H04L27/2657 ,  H04L27/2662 ,  H04W56/0035 ,  H04W56/0045

摘要： A receiver receives and front-end processes a plurality of component carrier signals, each carrier spaced apart in frequency. The digitized, baseband component carrier signals are inspected to determine estimates of timing offsets between the carriers. A control unit selects a first component carrier signal having data scheduled to the receiver. If data is scheduled to the receiver on other component carrier signals, the control unit generates timing and frequency offset adjustment control signals to time- and frequency-align each other component carrier signal having relevant data, to the first component carrier signal. All the relevant component carrier signals are then combined, and a single OFDM symbol, spanning all the relevant component carriers, is presented to an FFT for symbol detection.

摘要翻译： 接收机接收和前端处理多个分量载波信号，每个载波频率间隔开。 检查数字化的基带分量载波信号以确定载波之间的定时偏移的估计。 控制单元选择具有被调度给接收机的数据的第一分量载波信号。 如果在其他分量载波信号上将数据调度给接收机，则控制单元产生定时和频率偏移调整控制信号，以将具有相关数据的每个其它分量载波信号时间和频率对齐到第一分量载波信号。 然后组合所有相关的分量载波信号，将跨越所有相关分量载波的单个OFDM符号呈现给用于符号检测的FFT。

公开(公告)号：US08744020B2

公开(公告)日：2014-06-03

申请号：US13127044

申请日：2009-10-30

申请人： Niklas Andgart ,  Fredrik Nordström

发明人： Niklas Andgart ,  Fredrik Nordström

IPC分类号： H04L27/06

CPC分类号： H04L27/2659 ,  H04L5/0007 ,  H04L25/023

摘要： A frequency offset of a received signal comprising a number of subsequently received data symbols is estimated. A first estimate is determined from a calculated change in phase of the received signal between two received symbols having a first time distance between them. At least one further estimate is determined from a calculated change in phase of the received signal between two received symbols having a different time distance. A frequency periodicity is determined for each estimate from the distance between the two received symbols from which the estimate was determined. A set of integer values is determined for each estimate so that frequency values calculated for each estimate as the frequency periodicity multiplied by the integer value added to the estimate are at least approximately equal to each other, and a corrected estimate of the frequency offset is determined from the integer values.

摘要翻译： 估计包括多个随后接收的数据符号的接收信号的频率偏移。 从在它们之间具有第一时间距离的两个接收符号之间的接收信号的计算的相位变化确定第一估计。 从具有不同时间距离的两个接收符号之间的接收信号的计算的相位变化确定至少一个另外的估计。 根据确定估计的两个接收符号之间的距离为每个估计确定频率周期。 为每个估计确定一组整数值，使得为每个估计计算的频率值作为频率周期乘以加到估计的整数值至少近似相等，并且确定频率偏移的校正估计 从整数值。

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

IPC分类号： H04L27/00 ,  H04B1/06

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。

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。

公开(公告)号：US20100135423A1

公开(公告)日：2010-06-03

申请号：US12598613

申请日：2008-05-05

申请人： Bengt Lindoff ,  Leif Wilhelmsson ,  Fredrik Nordström

发明人： Bengt Lindoff ,  Leif Wilhelmsson ,  Fredrik Nordström

IPC分类号： H04L27/28 ,  H04L27/06

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。

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

IPC分类号： H04B1/00 ,  H04B1/16 ,  H04J3/06

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。

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

IPC分类号： H03D1/00 ,  H04L27/06

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。

公开(公告)号：US20120051464A1

公开(公告)日：2012-03-01

申请号：US12869816

申请日：2010-08-27

申请人： Matthias Kamuf ,  Bengt Lindoff ,  Sven Mattisson ,  Fredrik Nordström

发明人： Matthias Kamuf ,  Bengt Lindoff ,  Sven Mattisson ,  Fredrik Nordström

IPC分类号： H04L27/06 ,  H04L25/08

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。

公开(公告)号：US20120027048A1

公开(公告)日：2012-02-02

申请号：US13145789

申请日：2010-01-20

申请人： Bengt Lindoff ,  Fredrik Nordström ,  Bo Lincoln ,  Anders Rosenqvist

发明人： Bengt Lindoff ,  Fredrik Nordström ,  Bo Lincoln ,  Anders Rosenqvist

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。