公开(公告)号：US20130107694A1

公开(公告)日：2013-05-02

申请号：US13703410

申请日：2010-07-14

Applicant: Yang Hu ,  Elias Jonsson

Inventor： Yang Hu ,  Elias Jonsson

IPC: H04W24/02

CPC classification number: H04W24/02 ,  H04J13/0003 ,  H04J13/004 ,  H04J13/0048 ,  H04J13/18 ,  H04L5/0016 ,  H04L5/0051 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0232 ,  H04L27/2613 ,  H04L27/262 ,  H04W48/08 ,  H04W72/042

Abstract: When more than two layers are multiplexed in one CDM group, length-4 OCC has to be used across both clusters in one subframe. This means that slot-by-slot channel estimation according to conventional schemes cannot be exploited and Doppler impact cannot be well overcome. By introducing virtual variables and virtual channel samples that are used in processing two time slots in a subframe independently and applying a frequency domain filter based on the virtual variables and then performing postprocessing based on virtual channel samples, slot-by-slot processing is possible to reduce latency and overcome Doppler impact. Code de-spreading of length-4 OCC is no longer processed in time domain, but in frequency domain with two adjacent CDM subgroups. As a result, the frequency domain filtering can start earlier whereby detection latency and processing time for OCC of length longer than 2 is reduced. It can also be used for the length-2 OCC.

Abstract translation: 当一个CDM组中多于两层复用时，必须在一个子帧中跨两个簇使用长度为4的OCC。 这意味着根据常规方案的逐时隙信道估计不能被利用，并且多普勒影响不能很好地克服。 通过引入用于独立处理子帧中的两个时隙的虚拟变量和虚拟信道样本，并且基于虚拟变量应用频域过滤器，然后基于虚拟信道样本执行后处理，逐个时隙处理是可能的 减少延迟并克服多普勒影响。 长度为4的OCC的码扩展不再在时域中进行处理，而是在频域中具有两个相邻的CDM子组。 结果，可以更早地开始频域滤波，从而降低长度大于2的OCC的检测等待时间和处理时间。 它也可以用于长度为2的OCC。

公开(公告)号：US20120195211A1

公开(公告)日：2012-08-02

申请号：US13021438

申请日：2011-02-04

Applicant: Elias Jonsson ,  Eric Blanquer ,  Kazuyoshi Uesaka

Inventor： Elias Jonsson ,  Eric Blanquer ,  Kazuyoshi Uesaka

IPC: H04W24/00

CPC classification number: H04B1/7097 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/7071

Abstract: This disclosure is directed to a wireless receiver and a method for configuring the wireless receiver, comprising the actions of determining a geometry factor for a channel over which signals are transmitted to the wireless receiver, the geometry factor being a measure indicative of inter-cell interference plus noise power at the wireless receiver; determining the variance of the determined geometry factor, the variance being a measure indicative of the variation in time or rate of the geometry factor; and configuring the wireless receiver based on the geometry factor and the variance of the geometry factor.

Abstract translation: 本公开涉及一种用于配置无线接收机的无线接收机和方法，包括确定信号被传输到无线接收机的信道的几何因子的动作，几何因子是指示小区间干扰的度量 加上无线接收机的噪声功率; 确定确定的几何因子的方差，方差是指示几何因子的时间或速率变化的度量; 并基于几何因子和几何因子的方差来配置无线接收机。

公开(公告)号：US08218606B2

公开(公告)日：2012-07-10

申请号：US12423480

申请日：2009-04-14

Applicant: Elias Jonsson

Inventor： Elias Jonsson

IPC: H04B1/69

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: According to the teachings disclosed in this document, a receiver estimates impairment correlations for a received signal using received pilot values. This direct estimation of impairment correlations based on direct pilot observations, provides for a rich capture of all impairment sources bearing on the received signal. Advantageously, however, estimation noise is reduced by generating a structured covariance matrix from the measured covariance matrix, and carrying out structured filtering within the structured covariance matrix. Structured filtering involves averaging matrix elements that correspond to the same processing delay difference as used for measured impairment correlation estimation. In one or more embodiments, averaged net channel estimates are used to obtain a rank one matrix, which is used to convert a measured covariance matrix to a structured covariance matrix, for carrying out structured filtering.

Abstract translation: 根据本文件中公开的教导，接收机使用接收到的导频值来估计接收信号的损害相关性。 这种基于直接导频观测的损伤相关性的直接估计提供了对接收信号的所有损伤来源的丰富捕获。 然而，有利的是，通过从所测量的协方差矩阵生成结构化协方差矩阵，并在结构化协方差矩阵内进行结构化滤波来减小估计噪声。 结构化滤波涉及平均矩阵元素，其对应于用于测量的损害相关估计的相同的处理延迟差。 在一个或多个实施例中，使用平均净信道估计来获得秩一矩阵，其用于将测量的协方差矩阵转换为结构化协方差矩阵，以执行结构化过滤。

公开(公告)号：US07848387B2

公开(公告)日：2010-12-07

申请号：US11751109

申请日：2007-05-21

Applicant: Elias Jonsson ,  Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Stephen J. Grant

Inventor： Elias Jonsson ,  Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Stephen J. Grant

IPC: H04B1/00

CPC classification number: H04B1/712 ,  H04B7/0634 ,  H04B2201/709727

Abstract: A parametric form of G-Rake and chip equalization for closed-loop transmit diversity is provided, that accounts for impairment correlation between transmit antennas. In a closed-loop transmit diversity system, the base station transmits a signal from two or more antennas, using one of a predetermined set of relative phase offsets at one of the antennas. The parametric estimation of the impairment or data covariance is performed by summing terms, including a term for each possible phase offset. The terms are weighted by fitting parameters. The fitting parameters are jointly solved by fitting the impairment or data covariance estimate to a measured impairment or data covariance. In another aspect, a measured impairment covariance is formed by exploiting a special relationship between the pilot channels of the different transmit antennas.

Abstract translation: 提供了用于闭环发射分集的G-Rake和码片均衡的参数形式，其考虑了发射天线之间的损害相关性。 在闭环发射分集系统中，基站使用在天线之一处的预定相对相位偏移集合中的一个从两个或多个天线发射信号。 损伤或数据协方差的参数估计是通过求和术语来执行的，包括每个可能的相位偏移的项。 这些术语通过拟合参数加权。 拟合参数通过将损伤或数据协方差估计拟合为测量的损伤或数据协方差来共同解决。 在另一方面，通过利用不同发射天线的导频信道之间的特殊关系来形成测量的损害协方差。

公开(公告)号：US20100215132A1

公开(公告)日：2010-08-26

申请号：US12477168

申请日：2009-06-03

Applicant: Elias Jonsson ,  Oskar Drugge

Inventor： Elias Jonsson ,  Oskar Drugge

IPC: H04B1/10

CPC classification number: H04L25/0328 ,  H04B1/7115 ,  H04B1/7117 ,  H04L25/03821

Abstract: A multi-carrier linear equalization receiver, e.g., a RAKE receiver or chip equalization receiver, is described herein. The multi-carrier receiver distributes processing delays among a plurality of received carriers based on a comparison between the signal-to-interference ratios (SIRs) determined for each carrier. The receiver initially allocates a minimum number of processing delays to each carrier. In one embodiment, any remaining additional processing delays are distributed evenly between the carriers when a comparison between the largest and smallest SIR is less than or equal to a threshold. In another embodiment, the remaining additional processing delays are distributed to favor the carrier(s) with the strongest SIR(s) when the comparison between the largest and smallest SIR exceeds the threshold. By distributing the additional processing delays to favor the carriers with the strongest SIRs, the embodiments of the present invention enable system designers to limit the total number of available processing delays without sacrificing performance.

Abstract translation: 这里描述了多载波线性均衡接收机，例如RAKE接收机或码片均衡接收机。 多载波接收机基于为每个载波确定的信号干扰比（SIR）之间的比较，在多个接收载波中分配处理延迟。 接收机最初为每个载波分配最少数量的处理延迟。 在一个实施例中，当最大和最小SIR之间的比较小于或等于阈值时，任何剩余的附加处理延迟均匀地分布在载波之间。 在另一个实施例中，当最大SIR和最小SIR之间的比较超过阈值时，分配剩余的附加处理延迟以支持具有最强SIR的载波。 通过分配附加的处理延迟以有利于具有最强SIR的载波，本发明的实施例使得系统设计者能够在不牺牲性能的情况下限制可用处理延迟的总数。

公开(公告)号：US20100172396A1

公开(公告)日：2010-07-08

申请号：US12581943

申请日：2009-10-20

Applicant: Douglas A. Cairns ,  Elias Jonsson ,  Göran Bergman

Inventor： Douglas A. Cairns ,  Elias Jonsson ,  Göran Bergman

IPC: H04B1/707 ,  H04L27/00

CPC classification number: H04B1/712 ,  H04B1/7113 ,  H04B1/7117

Abstract: A method and apparatus provide for setting processing delay assignments in a CDMA receiver using a flat-channel placement or using a dispersive channel placement, in dependence on characterizing the channel as flat or dispersive. For example, a receiver maintains a logical flag reliably indicating the current channel state as flat or dispersive, and assigns or otherwise sets processing delays—e.g., for received signal demodulation—using a flat-channel placement algorithm or a dispersive-channel placement algorithm. The “flat-channel” placement algorithm generally provides better performance in flat-channel environments, and the “dispersive-channel” placement algorithm generally provides better performance in dispersive channel environments. Such processing may be regarded as “activating” a simplified processing delay placement grid that offers better performance if the channel truly is flat, with the underlying advantage of providing a reliable mechanism for detecting flat channel conditions.

Abstract translation: 一种方法和装置提供用于使用平面信道放置或使用色散信道放置来设置CDMA接收机中的处理延迟分配，这取决于将信道表示为平坦或分散。 例如，接收器将逻辑标志可靠地指示当前信道状态为平坦或分散，并且分配或以其他方式设置处理延迟，例如，对于接收信号解调，使用平坦信道布局算法或色散通道布局算法。 “平面通道”放置算法通常在平坦通道环境中提供更好的性能，“色散通道”放置算法通常在色散通道环境中提供更好的性能。 这样的处理可以被认为是“激活”简化的处理延迟布置网格，如果信道真的是平坦的，则提供更好的性能，其基本优点是提供用于检测平坦信道条件的可靠机制。

公开(公告)号：US20100087219A1

公开(公告)日：2010-04-08

申请号：US11721938

申请日：2005-12-15

Applicant: Elias Jonsson ,  Johan Nilsson ,  Rama Kumar Mopidevi

Inventor： Elias Jonsson ,  Johan Nilsson ,  Rama Kumar Mopidevi

IPC: H04W52/04

CPC classification number: H04W52/12 ,  H04W52/225 ,  H04W52/24 ,  H04W52/36 ,  H04W52/44

Abstract: A method for generating a filtered signal quality value used in a power control system of a wireless communication apparatus. An estimated signal quality value of a received signal is generated. A filtered signal quality value is generated based on the estimated signal quality value. The filtered signal quality value is generated in dependence of at least one of registering a difference between a first and a second reference signal quality value, and a change in transmitted power of said received signal. A power control device comprising a signal quality estimator, a BLER estimator, a regulator, and an inner loop is configured to implement the method.

Abstract translation: 一种用于生成在无线通信装置的功率控制系统中使用的滤波信号质量值的方法。 产生接收信号的估计信号质量值。 基于估计的信号质量值生成经过滤波的信号质量值。 滤波后的信号质量值根据第一和第二参考信号质量值之间的差异以及所述接收信号的发射功率的变化中的至少一个而产生。 包括信号质量估计器，BLER估计器，调节器和内部环路的功率控制设备被配置为实现该方法。

公开(公告)号：US20090310715A1

公开(公告)日：2009-12-17

申请号：US12239918

申请日：2008-09-29

Applicant: Douglas Cairns ,  Elias Jonsson

Inventor： Douglas Cairns ,  Elias Jonsson

IPC: H04L27/38 ,  H04L27/06

CPC classification number: H04L25/0236 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0068 ,  H04L25/021 ,  H04L25/0226 ,  H04L25/03044 ,  H04L25/03324 ,  H04L25/061 ,  H04L27/0012 ,  H04L27/227 ,  H04L27/3455 ,  H04L27/3818 ,  H04L2001/0098 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03796 ,  H04L2027/0061 ,  H04L2027/0093

Abstract: A receiver and method for receiving and processing a sequence of transmitted symbols in a digital communication system utilizing soft pilot symbols. A set of soft pilot symbols are transmitted with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16QAM or 64QAM. The receiver knows the modulation type and location (time/frequency/code) of the soft pilot symbols, and demodulates them first. The receiver uses the demodulated soft pilot symbols as known symbols to estimate parameters of the received radio signal. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols.

Abstract translation: 一种用于在利用软导频符号的数字通信系统中接收和处理发送符号序列的接收机和方法。 通过用诸如BPSK或QPSK的低阶调制来调制软导频符号，同时以诸如16QAM或64QAM的更高阶调制来调制剩余的符号，发送一组软导频符号比该序列中的剩余符号更高的可靠性。 接收机知道软导频符号的调制类型和位置（时间/频率/码），并首先解调它们。 接收机使用解调的软导频符号作为已知符号来估计所接收的无线电信号的参数。 与传统的固定飞行员不同，软飞行员仍然携带一些数据。 此外，软导频器在建立解调高阶调制符号时必不可少的幅度参考是特别有用的。

公开(公告)号：US20090245338A1

公开(公告)日：2009-10-01

申请号：US12278379

申请日：2007-02-08

Applicant: Elias Jonsson

Inventor： Elias Jonsson

IPC: H04B17/00

CPC classification number: H04L27/2647 ,  H04B1/707 ,  H04L25/0204 ,  H04L25/0216 ,  H04L25/022 ,  H04L25/0236 ,  H04L25/0244

Abstract: A method and a device for channel response determination for a wireless communication system. The method comprises generating a first vector of channel responses from channel estimations obtained by using a training signal. A second vector of regularized channel responses is generated by applying to the first vector a regularization algorithm. The algorithm is operative such that a second difference between consecutive regularized channel responses of the second vector is less than a first difference between consecutive channel responses of the first vector.

Abstract translation: 一种用于无线通信系统的信道响应确定的方法和装置。 该方法包括从通过使用训练信号获得的信道估计产生信道响应的第一矢量。 通过将正则化算法应用于第一向量来生成正则化信道响应的第二向量。 该算法的操作使得第二向量的连续正则化信道响应之间的第二个差值小于第一个向量的连续信道响应之间的第一个差值。

公开(公告)号：US20080310562A1

公开(公告)日：2008-12-18

申请号：US11762982

申请日：2007-06-14

Applicant: Andres Reial ,  Girum Alebachew ,  Elias Jonsson

Inventor： Andres Reial ,  Girum Alebachew ,  Elias Jonsson

IPC: H03K5/01

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: The impairment processor described herein uses a look-up table operation to reduce the computational complexity associated with determining an impairment correlation between first and second sample streams for an interference rejection receiver. One exemplary impairment processor iteratively computes multiple partial impairment correlations based on values selected from look-up table(s), and combines the partial impairment correlations to obtain a final impairment correlation between the first and second sample streams. During each iteration, the impairment processor computes a pair of delay offsets corresponding to the respective processing and path delays of the first and second sample streams, computes an index value as a function of a difference between the pair of delay offsets, selects a pre-computed value from the look-up table based on the index value, determines a pulse correlation estimate based on the selected pre-computed value, and determines the partial impairment correlation for that iteration based on the pulse correlation estimate.

Abstract translation: 本文描述的损害处理器使用查找表操作来减少与确定用于干扰抑制接收机的第一和第二采样流之间的损害相关性相关联的计算复杂度。 一个示例性损伤处理器基于从查找表中选择的值迭代地计算多个部分损伤相关性，并组合部分损伤相关性以获得第一和第二样本流之间的最终损害相关性。 在每次迭代期间，损害处理器计算与第一和第二采样流的相应处理和路径延迟相对应的一对延迟偏移，计算作为一对延迟偏移之间的差的函数的索引值， 基于该索引值从查找表计算的值，基于所选择的预先计算的值确定脉冲相关估计，并且基于脉冲相关估计确定该迭代的部分损伤相关性。