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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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公开(公告)号：US08903349B2
公开(公告)日：2014-12-02
申请号：US13885186
申请日：2011-11-24
申请人： Bengt Lindoff , Fredrik Nordström
发明人： Bengt Lindoff , Fredrik Nordström
CPC分类号： H04W52/0261 , H04W52/0232 , H04W52/0274 , Y02D70/1224 , Y02D70/1242 , Y02D70/1262 , Y02D70/24
摘要： A receiver is operated in a first power mode, for example a high power mode, during a first portion of a particular connection state (for example, a RRC_CONNECTED state in LTE when the UE receiver is on) of a communication protocol being used by the telecommunications network, and a second power mode during a second portion of the particular connection state, for example a low power mode.
摘要翻译： 在特定连接状态的第一部分（例如，当UE接收机处于接通状态的LTE中的RRC_CONNECTED状态）时，接收机以第一功率模式操作，例如高功率模式。 电信网络以及在特定连接状态的第二部分期间的第二功率模式，例如低功率模式。
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公开(公告)号：US20130336280A1
公开(公告)日：2013-12-19
申请号：US13527224
申请日：2012-06-19
申请人： Fredrik Nordström , Bengt Lindoff
发明人： Fredrik Nordström , Bengt Lindoff
IPC分类号： H04W72/04
CPC分类号： H04W72/0446 , H04L5/0023 , H04L5/0048 , H04L25/0222 , H04L25/03343 , H04L25/03949 , H04L27/261
摘要： In a system using spatial precoding, in the event that reliable channel state information is unavailable, a transmitting node uses an extended transmission mode, in which the precoders applied to data within each of several groups of time-frequency resources vary according to frequency. The extended transmission mode creates a frequency-selective variation in precoders, which may appear to be random, while using DMRS-based transmission. This variation is achieved by applying different precoders to the resource elements carrying data, using a pattern of precoder variation that is known to the receiving device. The precoding applied to DMRS within a given group of time-frequency resources is held constant—thus, the varying precoders within a given group of time-frequency resources are only applied to data elements, not to the DMRS resource elements.
摘要翻译： 在使用空间预编码的系统中，在可靠的信道状态信息不可用的情况下，发送节点使用扩展传输模式，其中应用于几组时频资源中的每一组中的数据的预编码器根据频率而变化。 在使用基于DMRS的传输时，扩展传输模式在预编码器中产生频率选择性变化，其可能看起来是随机的。 通过使用接收设备已知的预编码器变化的模式，将不同的预编码器应用于携带数据的资源元件来实现。 在给定的一组时间 - 频率资源内的DMRS应用的预编码保持不变，因此，给定的一组时间 - 频率资源内的变化的预编码器仅被应用于数据元素而不是DMRS资源元素。
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公开(公告)号：US20130336135A1
公开(公告)日：2013-12-19
申请号：US13527197
申请日：2012-06-19
申请人： Bengt Lindoff , Fredrik Nordström
发明人： Bengt Lindoff , Fredrik Nordström
CPC分类号： H04B7/0417 , H04B7/0656 , H04L5/0023 , H04L5/0051 , H04L25/0222 , H04L25/03343 , H04L25/03949
摘要： In a system using spatial precoding, in the event that reliable channel state information is unavailable, a transmitting node artificially creates a randomization of the precoders applied to the transmitted signal. Different precoding vectors are applied to both transmitted data and demodulation reference signals for each of several groups of time-frequency resources, where the precoding vectors vary randomly or pseudo-randomly from each group of time-frequency resources to the next frequency-adjacent group or groups, or to the next time-adjacent group or groups, or both. In an LTE system in particular, this randomization of precoders can be applied at the resource-block level or, at the level of the Precoding Resource block Group (PRG), for example. Thus, the precoders applied to the transmitted signal vary from one PRG to the next, in a random or pseudo-random fashion.
摘要翻译： 在使用空间预编码的系统中，在可靠的信道状态信息不可用的情况下，发送节点人为地创建应用于发送信号的预编码器的随机化。 不同的预编码矢量被应用于几组时频资源中的每一个的发射数据和解调参考信号，其中预编码矢量随时间或伪随机地从每组时频资源变化到下一个频率相邻组，或者 组或下一个与时间相邻的组或组，或两者。 特别地，在LTE系统中，例如，可以在资源块级或预编码资源块组（PRG）的级别应用预编码器的这种随机化。 因此，应用于发射信号的预编码器以随机或伪随机方式从一个PRG到下一个不同。
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公开(公告)号：US08477860B2
公开(公告)日：2013-07-02
申请号：US12869816
申请日：2010-08-27
IPC分类号： H04L27/01
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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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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