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31. 发明授权

US08934581B2 Method and apparatus for soft symbol processing in a communication receiver 有权
标题翻译：通信接收机中用于软符号处理的方法和装置
公开(公告)号：US08934581B2
公开(公告)日：2015-01-13
申请号：US13454919
申请日：2012-04-24
申请人： Michael Samuel Bebawy , Fredrik Huss , Yi-Pin Eric Wang
发明人： Michael Samuel Bebawy , Fredrik Huss , Yi-Pin Eric Wang
IPC分类号： H04L27/06
CPC分类号： H04L25/03012 , H04L1/005 , H04L25/03171 , H04L25/0328 , H04L27/38
摘要： In one aspect, the present invention improves Turbo equalization and/or soft interference cancellation processing in communication receivers by providing an efficient and accurate technique to compute the second moment of a received symbol, e.g., an interfering symbol, as a function of the expected bit values of only those bits in the symbol that are magnitude-controlling bits according to a defined modulation constellation. Advantageously, the expected bit values in at least one embodiment are computed using a LUT that maps bit LLRs to corresponding hyperbolic tangent function values. Further, the expected symbol value is computed as a linear function of terms comprising the expected bit values and the soft symbol variance is efficiently computed from the second moment and the expected symbol value squared. This simplified processing reduces receiver complexity, particularly in the context of modulation constellations having non-constant magnitudes, and thus saves power and/or improves design economics.
摘要翻译：在一个方面，本发明通过提供有效和准确的技术来计算接收符号的第二时刻（例如干扰符号）来改善通信接收机中的Turbo均衡和/或软干扰消除处理，作为预期位的函数根据定义的调制星座，只有符号中那些位是幅度控制位的值。有利地，使用将位LLR映射到对应的双曲正切函数值的LUT来计算至少一个实施例中的预期位值。此外，预期符号值被计算为包括预期位值的项的线性函数，并且从第二时刻有效地计算软符号方差，并且预期符号值平方。这种简化的处理降低了接收机的复杂度，特别是在具有非恒定幅度的调制星座的上下文中，从而节省功率和/或提高了设计经济性。

32. 发明授权

US08848844B2 Receiver node and a method therein for compensating frequency offset 有权
标题翻译：接收器节点及其中用于补偿频偏的方法
公开(公告)号：US08848844B2
公开(公告)日：2014-09-30
申请号：US13820814
申请日：2010-09-17
申请人： Mattias Hyll , Fredrik Huss
发明人： Mattias Hyll , Fredrik Huss
IPC分类号： H04L27/06 , H04L27/00 , H04L25/02
CPC分类号： H04L25/0206 , H04L27/0014 , H04L27/2657 , H04L27/2675 , H04L27/2686 , H04L2027/0065 , H04L2027/0087
摘要： According to embodiments herein an ambiguity problem when compensating for frequency offset may be solved by compensating a received reference symbol according to two different frequency offset hypotheses; the estimated frequency offset and the a mirrored version of the same. Then by comparing the compensated reference symbol of the different frequency hypotheses with a target reference symbol, which is known at the receiver node 12, the frequency offset hypothesis which is most likely is used to compensate a received data symbol.
摘要翻译：根据本文的实施例，可以通过根据两个不同的频率偏移假设补偿接收到的参考符号来解决补偿频率偏移时的模糊问题; 估计的频率偏移和镜像版本相同。然后，通过将不同频率假设的补偿参考符号与在接收器节点12处已知的目标参考符号进行比较，最有可能的频率偏移假设用于补偿接收到的数据符号。

33. 发明申请

US20140254421A1 CHANNEL ESTIMATION USING REFERENCE SIGNALS 有权
标题翻译：使用参考信号的信道估计
公开(公告)号：US20140254421A1
公开(公告)日：2014-09-11
申请号：US14355539
申请日：2011-11-03
申请人： Mats Ahlander , David Sandberg , Fredrik Huss , Pontus Arvidsson
发明人： Mats Ahlander , David Sandberg , Fredrik Huss , Pontus Arvidsson
IPC分类号： H04W24/06
CPC分类号： H04W24/06 , H04L25/0202 , H04L25/0224 , H04W72/1226
摘要： A method in a radio network node for estimating channel gain over frequencies of a bandwidth in a radio communications network. The radio network node measures a first channel gain based on a received power of a sounding reference signal over a first set of frequencies from a user equipment, which first set of frequencies is comprised in the frequencies of the bandwidth. Furthermore, the radio network node measures a second channel gain based on a received power of a received demodulation reference signal of a physical uplink shared channel over a second set of frequencies from the user equipment, which second set of frequencies is comprised in the frequencies of the bandwidth. The radio network node then estimates a third channel gain over the frequencies of the bandwidth based on the measured first channel gain and the measured second channel gain.
摘要翻译：一种无线电网络节点中用于估计无线电通信网络中的带宽频率上的信道增益的方法。无线电网络节点基于来自用户设备的第一组频率上的探测参考信号的接收功率来测量第一信道增益，该第一组频率包括在带宽的频率中。此外，无线电网络节点基于来自用户设备的第二组频率上的物理上行链路共享信道的接收解调参考信号的接收功率测量第二信道增益，该第二组频率包括在带宽。无线电网络节点然后基于所测量的第一信道增益和所测量的第二信道增益来估计带宽频率上的第三信道增益。

34. 发明授权

US08605799B2 Estimation of frequency offset between a base station and mobile terminal 有权
公开(公告)号：US08605799B2
公开(公告)日：2013-12-10
申请号：US13170930
申请日：2011-06-28
申请人： Guoqiang Lu , Oskar Mauritz , Fredrik Huss , Henrik Back
发明人： Guoqiang Lu , Oskar Mauritz , Fredrik Huss , Henrik Back
IPC分类号： H04L25/00 , H04L7/00
CPC分类号： H04W56/0035 , H04J11/0079 , H04J2011/0096 , H04L27/2657 , H04L27/2686 , H04W24/08 , H04W56/001
摘要： A method and apparatus for frequency offset estimation exploits the differences in reference symbol timing for different channels to resolve ambiguities in the frequency offset estimation. Based on the initial frequency offset estimates, a hypothesis table is constructed providing hypothesized frequency offsets for each channel for a plurality of possible offset regions. An error metric for each offset region is calculated based on the difference of the hypothesized frequency offsets. The set of hypothesized frequency offsets that minimize the error metric is selected as the final frequency offset estimates.

35. 发明申请

US20120108194A1 METHOD AND ARRANGEMENT FOR INTERFERENCE MITIGATION 有权
标题翻译：干扰减缓的方法和布置
公开(公告)号：US20120108194A1
公开(公告)日：2012-05-03
申请号：US12941121
申请日：2010-11-08
申请人： Fredrik Lindqvist , Fredrik Huss
发明人： Fredrik Lindqvist , Fredrik Huss
IPC分类号： H04B1/10
CPC分类号： H04B7/0871 , H04B7/0854 , H04B17/345
摘要： 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.
摘要翻译：在减轻通信系统中的接收信号的干扰的方法中，经由至少两个天线元件接收S10发送的信号，估计S20接收信号的信道，并且基于所估计的信道估计估计S30干扰协方差矩阵干扰协方差矩阵表示接收信号的接收干扰加噪声。随后，通过增强协方差矩阵的对角元素来适应S40估计的协方差矩阵，以提供增强的协方差矩阵，以减小协方差矩阵的特征值的扩展，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选择性地使用S50来减轻接收信号的干扰，以在具有多普勒频率的信道上提供具有改进质量的接收信号。

36. 发明授权

US08055278B2 Systems and methods for tracking power peaks of a signal 有权
标题翻译：用于跟踪信号功率峰值的系统和方法
公开(公告)号：US08055278B2
公开(公告)日：2011-11-08
申请号：US12274808
申请日：2008-11-20
申请人： Ulf Skärby , Erling Floser , Fredrik Huss
发明人： Ulf Skärby , Erling Floser , Fredrik Huss
IPC分类号： H04Q7/20
CPC分类号： H04W56/004 , H04W60/00 , H04W84/047
摘要： In one aspect, the invention provides a method for tracking a mobile terminal. In some embodiments, this method includes the following steps: receiving a signal transmitted from the mobile terminal; searching a primary search area for a signal associated with the mobile terminal; searching a secondary search area for a signal associated with the mobile terminal, wherein the secondary search area is larger than the primary search area; determining the strength of a signal associated with the mobile terminal that was found by searching the secondary search area; and determining whether the primary search area should be modified based on the determined strength of the signal that was found by searching the secondary search area.
摘要翻译：一方面，本发明提供了一种跟踪移动终端的方法。在一些实施例中，该方法包括以下步骤：接收从移动终端发送的信号; 搜索主搜索区域以获取与所述移动终端相关联的信号; 搜索辅助搜索区域以获取与所述移动终端相关联的信号，其中所述辅助搜索区域大于所述主搜索区域; 确定通过搜索辅助搜索区域找到的与移动终端相关联的信号的强度; 以及基于通过搜索辅助搜索区域确定的信号的确定的强度来确定是否应该修改主搜索区域。

37. 发明申请

US20110085491A1 Extended Cell Range 有权
标题翻译：扩展单元范围
公开(公告)号：US20110085491A1
公开(公告)日：2011-04-14
申请号：US12887704
申请日：2010-09-22
申请人： Tobias Tynderfeldt , Dirk Gerstenberger , Fredrik Huss , Daniel Larsson
发明人： Tobias Tynderfeldt , Dirk Gerstenberger , Fredrik Huss , Daniel Larsson
IPC分类号： H04B7/14
CPC分类号： H04W56/0045 , H04W56/0005
摘要： A solution for extending the cell range and in particular for a solution for handling timing alignment is presented herein. The solution comprises determining a distance between user equipment and a radio access network node. User equipment located at a distance related to a pre defined timing advance value is scheduled to handle uplink communication so as to arrive at a later time slot for reducing the risk of conflicting with other transmissions towards the access node.
摘要翻译：本文介绍了用于扩展单元范围，特别是用于处理定时对准的解决方案的解决方案。解决方案包括确定用户设备和无线电接入网络节点之间的距离。调度位于与预定义的定时提前值相关的距离的用户设备来处理上行链路通信，以便到达稍后的时隙，以减少与向接入节点的其他传输冲突的风险。

38. 发明申请

US20100027590A1 MODIFIED SIR VALUES FOR FAST POWER CONTROL 有权
标题翻译：用于快速功率控制的修改的SIR值
公开(公告)号：US20100027590A1
公开(公告)日：2010-02-04
申请号：US12513972
申请日：2006-11-07
申请人： Girum Alebachew , Carmela Cozzo , Gregory Bottomley , Fredrik Huss , Gunnar Peters
发明人： Girum Alebachew , Carmela Cozzo , Gregory Bottomley , Fredrik Huss , Gunnar Peters
IPC分类号： H04B1/707 , H04B1/10
CPC分类号： H04W52/60 , H04B1/712 , H04B2201/709727 , H04W52/241
摘要： The present invention relates to a receiver comprising a fast power control unit, said fast power control unit being arranged to continuously control a quality measure of a radio channel. The receiver is characterized in that the quality measure is a modified Signal to Interference plus noise ratio (SIR) in which the influence from self interference has been removed. The invention further relates to a method for continuously controlling a quality measure of a radio channel, wherein a modified Signal to Interference plus noise ratio (SIR) is continuously determined in which the influence from self interference has been removed.
摘要翻译：本发明涉及包括快速功率控制单元的接收机，所述快速功率控制单元被布置成连续地控制无线电信道的质量测量。接收机的特征在于，质量测量是修改的信号与干扰加噪声比（SIR），其中已经去除了自身干扰的影响。本发明还涉及一种用于连续地控制无线电信道的质量测量的方法，其中连续地确定修改的信号与干扰加噪声比（SIR），其中已经去除了自身干扰的影响。

39. 发明申请

US20130170590A1 Receiver Node and A Method Therein for Compensating Frequency Offset 有权
标题翻译：接收机节点及其补偿频率偏移的方法
公开(公告)号：US20130170590A1
公开(公告)日：2013-07-04
申请号：US13820814
申请日：2010-09-17
申请人： Mattias Hyll , Fredrik Huss
发明人： Mattias Hyll , Fredrik Huss
IPC分类号： H04L25/02
CPC分类号： H04L25/0206 , H04L27/0014 , H04L27/2657 , H04L27/2675 , H04L27/2686 , H04L2027/0065 , H04L2027/0087
摘要： According to embodiments herein an ambiguity problem when compensating for frequency offset may be solved by compensating a received reference symbol according to two different frequency offset hypotheses; the estimated frequency offset and the a mirrored version of the same. Then by comparing the compensated reference symbol of the different frequency hypotheses with a target reference symbol, which is known at the receiver node 12, the frequency offset hypothesis which is most likely is used to compensate a received data symbol.
摘要翻译：根据本文的实施例，可以通过根据两个不同的频率偏移假设补偿接收到的参考符号来解决补偿频率偏移时的模糊问题; 估计的频率偏移和镜像版本相同。然后，通过将不同频率假设的补偿参考符号与在接收器节点12处已知的目标参考符号进行比较，最有可能的频率偏移假设用于补偿接收到的数据符号。

40. 发明申请

US20130121315A1 Uplink Synchronization Processing 审中-公开
标题翻译：上行同步处理
公开(公告)号：US20130121315A1
公开(公告)日：2013-05-16
申请号：US13520952
申请日：2010-01-15
申请人： Alexander Langereis , Fredrik Huss
发明人： Alexander Langereis , Fredrik Huss
IPC分类号： H04W56/00
CPC分类号： H04W56/0045
摘要： Uplink synchronization of user equipment, UE, (30, 40, 50) served by a radio base station, RBS, (20) is enabled by triggering (re)start of timing alignment, TA, timer (180) in response to a first TA command. Uplink timing of data received from the UE (30, 40, 50) during a measuring time window (63) constituting a defined sub-interval of a time interval (60) of the TA timer (180) is measured and employed for determining a timing advance for the UE (30, 40, 50). Transmission of a second TA command comprising a notification of the timing advance is co-scheduled together with a scheduled downlink data transmission to the UE (30, 40, 50) during a following scheduling time window (65) constituting a defined sub-interval of the time interval (60). The number of TA commands that are scheduled by themselves are minimized to free radio resources and increase the downlink throughput.
摘要翻译：由无线电基站RBS（20）服务的用户设备UE（30,40,50）的上行链路同步通过触发（重新）定时对准的开始，TA，计时器（180）响应于第一 TA指令。测量构成TA定时器（180）的时间间隔（60）的限定子间隔的测量时间窗（63）期间从UE（30,40,50）接收的数据的上行时序，并用于确定 UE的定时提前（30,40,50）。在后续的调度时间窗口（65）中，包括定时提前通知的第二TA命令的传输与调度的下行链路数据传输一起被调度到UE（30,40,50）时间间隔（60）。自己调度的TA命令的数量被最小化，以便释放无线电资源并增加下行吞吐量。

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