公开(公告)号：US09253655B2

公开(公告)日：2016-02-02

申请号：US13703410

申请日：2010-07-14

Applicant: Yang Hu ,  Elias Jonsson

Inventor： Yang Hu ,  Elias Jonsson

IPC: H04W24/02 ,  H04J13/00 ,  H04J13/18 ,  H04L25/02 ,  H04L27/26 ,  H04L5/00 ,  H04W48/08 ,  H04W72/04

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：US20130114429A1

公开(公告)日：2013-05-09

申请号：US13291900

申请日：2011-11-08

Applicant: Elias Jonsson ,  Andres Reial

Inventor： Elias Jonsson ,  Andres Reial

IPC: H04W24/00

CPC classification number: H04L1/0038 ,  H04L1/0048 ,  H04L1/0061 ,  H04W8/26

Abstract: The present invention includes a method and apparatus for autonomously determining by a first UE the identities (IDs) of one or more other UEs that are operating in or around the same network area as the first UE. More particularly, the first UE determines with a defined reliability the UE ID of an otherwise unknown UE based on receiving and processing an HS-SCCH transmission targeted to the unknown UE. By learning actual UE IDs for one or more other UEs operating in or around the same area as the first UE, the first UE can then properly decode HS-SCCH transmissions to those other UEs, and thereby gain knowledge of the signal structures used for data (HS-PDCH) transmissions to those other UEs. Advantageously, the first UE applies such knowledge in its desired-signal receiver processing, such as for enhancing channel estimation and/or performing structured-signal interference cancellation.

Abstract translation: 本发明包括一种用于由第一UE自主确定在与第一UE相同的网络区域内或周围操作的一个或多个其他UE的身份（ID）的方法和装置。 更具体地，第一UE基于接收和处理针对未知UE的HS-SCCH传输，以确定的可靠性确定另一未知UE的UE ID。 通过学习在与第一UE相同的区域中操作的一个或多个其他UE的实际UE ID，则第一UE然后可以正确地解码对那些其他UE的HS-SCCH传输，从而获得用于数据的信号结构的知识 （HS-PDCH）传输到那些其他UE。 有利地，第一UE在其期望信号接收机处理中应用这样的知识，例如用于增强信道估计和/或执行结构化信号干扰消除。

公开(公告)号：US08411780B2

公开(公告)日：2013-04-02

申请号：US12391796

申请日：2009-02-24

Applicant: Elias Jonsson ,  Andreas Cedergren

Inventor： Elias Jonsson ,  Andreas Cedergren

IPC: H04B7/02 ,  H04L1/02

CPC classification number: H04B7/0413

Abstract: Methods and apparatus for processing a received multi-stream (MIMO) signal, and in particular for estimating a per-code traffic-channel-to-pilot power ratio for the MIMO signal are disclosed. An exemplary method includes the calculation of an average symbol amplitude or average symbol power level from a plurality of de-spread traffic channel symbols received in a first transmission slot and the estimation of a corresponding pilot symbol amplitude or pilot symbol power level, based on an estimated propagation channel response and at least one of a plurality of precoding vectors used to generate the MIMO signal. A per-code traffic-channel-to-pilot power ratio for the first transmission slot is computed by dividing the average symbol amplitude or average symbol power level by the corresponding pilot symbol amplitude or pilot symbol power level.

Abstract translation: 公开了用于处理接收的多流（MIMO）信号的方法和装置，特别是用于估计MIMO信号的每代码业务信道到导频功率比的方法和装置。 一种示例性方法包括：基于在第一传输时隙中接收的多个解扩业务信道符号中的平均符号幅度或平均符号功率电平的计算，以及相应导频符号幅度或导频符号功率电平的估计， 估计的传播信道响应以及用于生成MIMO信号的多个预编码矢量中的至少一个。 通过将平均符号幅度或平均符号功率电平除以相应的导频符号幅度或导频符号功率电平来计算用于第一传输时隙的每代码业务信道到导频功率比。

公开(公告)号：US08369383B2

公开(公告)日：2013-02-05

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

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。 平面通道布局算法通常在平坦通道环境中提供更好的性能，并且色散通道布局算法通常在色散通道环境中提供更好的性能。 这种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：US08229044B2

公开(公告)日：2012-07-24

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。

公开(公告)号：US20120155576A1

公开(公告)日：2012-06-21

申请号：US12971021

申请日：2010-12-17

Applicant: Elias Jonsson ,  Göran Bergman ,  Srikanth Gopal

Inventor： Elias Jonsson ,  Göran Bergman ,  Srikanth Gopal

IPC: H04L27/06

CPC classification number: H04W52/0245 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/24

Abstract: Methods and apparatus for controlling a receiver based on a received signal include receiving the signal; generating, based on a portion of the signal, a SIR estimate; comparing the SIR estimate and a threshold value; and demodulating a remaining portion of the signal only if the SIR estimate passes the threshold value.

Abstract translation: 基于接收信号控制接收机的方法和装置包括：接收信号; 基于信号的一部分产生SIR估计; 比较SIR估计和阈值; 以及仅当所述SIR估计通过所述阈值时才解调所述信号的剩余部分。

公开(公告)号：US08149929B2

公开(公告)日：2012-04-03

申请号：US12239918

申请日：2008-09-29

Applicant: Douglas Cairns ,  Elias Jonsson

Inventor： Douglas Cairns ,  Elias Jonsson

IPC: H04L27/00

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：US08041325B2

公开(公告)日：2011-10-18

申请号：US12107623

申请日：2008-04-22

Applicant: Elias Jonsson ,  Douglas A. Cairns ,  Kazuyoshi Uesaka ,  Hiroaki Watabe

Inventor： Elias Jonsson ,  Douglas A. Cairns ,  Kazuyoshi Uesaka ,  Hiroaki Watabe

IPC: H04B1/10

CPC classification number: H04B1/712 ,  H04B1/7097 ,  H04B2201/709727

Abstract: A mobile receiver having a multi-mode interference suppression function and a way to estimate its speed utilizes a parametric approach to interference suppression at high speeds, and a nonparametric approach at low speeds. In particular, if the mobile receiver is currently operating in a nonparametric mode and its speed exceeds a first predetermined threshold, the mobile receiver switches to a parametric mode. Conversely, if the mobile receiver is currently in parametric mode and its speed is less than a second predetermined threshold, the mobile receiver switches to nonparametric mode. In one embodiment, the speed may be estimated by a Doppler frequency in the received signal, and the thresholds are Doppler frequencies. In one embodiment, the first and second thresholds are different, creating a hysteresis in the mode switching.

Abstract translation: 具有多模式干扰抑制功能的移动接收机和估计其速度的方法利用高速干扰抑制的参数化方法和低速度的非参数方法。 特别地，如果移动接收机当前正在以非参数模式操作并且其速度超过第一预定阈值，则移动接收机切换到参数模式。 相反，如果移动接收机当前处于参数模式并且其速度小于第二预定阈值，则移动接收机切换到非参数模式。 在一个实施例中，可以通过接收信号中的多普勒频率来估计速度，并且阈值是多普勒频率。 在一个实施例中，第一和第二阈值是不同的，在模式切换中产生迟滞。

公开(公告)号：US20100315963A1

公开(公告)日：2010-12-16

申请号：US12532166

申请日：2008-01-11

Applicant: Ylva Jading ,  Erik Dahlman ,  Elias Jonsson ,  Stefan Parkvall

Inventor： Ylva Jading ,  Erik Dahlman ,  Elias Jonsson ,  Stefan Parkvall

IPC: H04L12/26 ,  H04W4/00

CPC classification number: H04W72/005 ,  H04J11/0093 ,  H04L5/0007 ,  H04L5/005 ,  H04W36/0055

Abstract: A network unit of an own cell is operated in a radio communication system utilizing a radio interface that includes a radio frame made up of a number of sub-frames. The own cell serves one or more user equipments. Operation includes obtaining information about a scheduling of MBSFN data transmissions in one or more neighboring cells. The information thereby obtained is used to generate an information signal that, for a given sub-frame, enables the one or more user equipments to determine whether neighboring cell measurements can be performed using a unicast group of Orthogonal Frequency Division Multiple access (OFDM) symbols. The information signal is transmitted to the one or more user equipments, which can then use the information to determine how to locate cell-specific reference symbols when doing measurements of neighboring cells.

Abstract translation: 自身小区的网络单元在利用包括由多个子帧构成的无线帧的无线接口的无线通信系统中进行操作。 自己的小区服务于一个或多个用户设备。 操作包括获得关于在一个或多个相邻小区中的MBSFN数据传输的调度的信息。 由此获得的信息用于生成信息信号，对于给定的子帧，使一个或多个用户设备能够使用正交频分多址（OFDM）符号的单播组来确定是否可以执行相邻小区测量 。 信息信号被发送到一个或多个用户设备，然后可以在进行相邻小区的测量时使用该信息来确定如何定位小区特定参考符号。

公开(公告)号：US07738535B2

公开(公告)日：2010-06-15

申请号：US11752014

申请日：2007-05-22

Applicant: Elias Jonsson ,  Andreas Cedergren

Inventor： Elias Jonsson ,  Andreas Cedergren

IPC: H04B1/00

CPC classification number: H04B1/712 ,  H04B2201/70701

Abstract: A receiver utilizes pilot channel propagation channel estimates and a signal-to-interference metric derived from the pilot channel to form combining weights for use in obtaining soft symbols from a desired channel for subsequent decoding. The soft symbols thus obtained are substantially independent of the pilot channel amplitude.

Abstract translation: 接收机利用导频信道传播信道估计和从导频信道导出的信号到干扰度量来形成用于从期望信道获得软符号以用于后续解码的组合权重。 如此获得的软符号基本上与导频信道幅度无关。