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    METHOD AND APPARATUS FOR SOFT SYMBOL PROCESSING IN A COMMUNICATION RECEIVER
    1.
    发明公开
    METHOD AND APPARATUS FOR SOFT SYMBOL PROCESSING IN A COMMUNICATION RECEIVER 审中-公开
    方法和设备软符号处理通信接收器中

    公开(公告)号：EP2745405A4

    公开(公告)日：2015-04-08

    申请号：EP13781543

    申请日：2013-03-12

    Applicant: ERICSSON TELEFON AB L M

    Inventor： SAMUEL BEBAWY MICHAEL ,  HUSS FREDRIK ,  WANG YI-PIN ERIC

    IPC: H04L25/03 ,  H04L1/00

    CPC classification number: H04L25/03012 ,  H04L1/005 ,  H04L25/03171 ,  H04L25/0328 ,  H04L27/38

    Abstract: 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.

    UPLINK SYNCHRONIZATION PROCESSING
    2.
    发明公开
    UPLINK SYNCHRONIZATION PROCESSING 审中-公开
    UP同步处理

    公开(公告)号：EP2524550A4

    公开(公告)日：2014-05-21

    申请号：EP10843336

    申请日：2010-01-15

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LANGEREIS ALEXANDER ,  HUSS FREDRIK

    IPC: H04W56/00

    CPC classification number: H04W56/0045

    Abstract: 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.

    METHOD AND ARRANGEMENT FOR IMPROVED INTERFERENCE REJECTION COMBINING
    3.
    发明公开
    METHOD AND ARRANGEMENT FOR IMPROVED INTERFERENCE REJECTION COMBINING 审中-公开
    方法和系统的组合改善的干扰抑制

    公开(公告)号：EP2510635A4

    公开(公告)日：2013-06-05

    申请号：EP09852108

    申请日：2009-12-09

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LINDQVIST FREDRIK ,  HUSS FREDRIK

    IPC: H04B7/08 ,  H04J11/00

    CPC classification number: H04J11/0046

    Abstract: In a method of interference rejection combining (IRC) for mitigating interference in received signals in the frequency domain for a telecommunication system, selecting (S 10) a sub-group of frequencies of a received signal, determining (S20) a joint representation of a covariance matrix for the interference plus noise for at least one time slot of the received signal for the selected sub-group of frequencies, determining (S30) a channel estimate based on at least one pilot symbol of said at least one time slot. Finally, determining (S40) IRC coefficients in the frequency domain for each symbol of said at least one time slot based on said determined joint representation of the covariance matrix and said determined channel estimate.

    SIMULTANEOUS CHANNEL ESTIMATION OF A CARRIER AND AN INTERFERER
    4.
    发明公开
    SIMULTANEOUS CHANNEL ESTIMATION OF A CARRIER AND AN INTERFERER 有权
    同时信道估计载体和干扰

    公开(公告)号：EP1875617A4

    公开(公告)日：2013-05-01

    申请号：EP06733439

    申请日：2006-04-11

    Applicant: ERICSSON TELEFON AB L M

    Inventor： HUSS FREDRIK

    IPC: H04B1/10 ,  H04L25/02 ,  H04L25/03 ,  H04W16/14

    CPC classification number: H04L25/0236 ,  H04B1/1027 ,  H04L25/0242 ,  H04L25/03305 ,  H04W16/14 ,  H04W56/00

    Abstract: Interference suppression in a receiver in a wireless network that utilizes training sequences for synchronization and channel estimation, wherein the training sequence of an interfering channel overlaps the training sequence of a desired channel to cause degraded channel estimation, by generating a channel estimate for a carrier part of a received signal; generating a residual signal where the carrier part has been removed from the received signal; generating covariance matrix estimates for interferer channel estimate candidates; selecting carrier and interferer channel estimates having the lowest energy in the covariance matrix; and, explicitly generating the selected interferer channel estimate.

    UPLINK SYNCHRONIZATION PROCESSING
    7.
    发明申请
    UPLINK SYNCHRONIZATION PROCESSING 审中-公开
    上拉同步处理

    公开(公告)号：WO2011087416A3

    公开(公告)日：2013-07-11

    申请号：PCT/SE2010050038

    申请日：2010-01-15

    Applicant: ERICSSON TELEFON AB L M ,  LANGEREIS ALEXANDER ,  HUSS FREDRIK

    Inventor： LANGEREIS ALEXANDER ,  HUSS FREDRIK

    IPC: H04W56/00

    CPC classification number: H04W56/0045

    Abstract: 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.

    Abstract translation: 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，包括定时提前的通知的第二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。

    MULTIPLE OUTER LOOP LINK ADAPTATION
    8.
    发明申请
    MULTIPLE OUTER LOOP LINK ADAPTATION 审中-公开
    多个外环链路适配

    公开(公告)号：WO2014072850A3

    公开(公告)日：2014-09-18

    申请号：PCT/IB2013059020

    申请日：2013-09-30

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LU GUOQIANG ,  YU PING ,  HUSS FREDRIK ,  MAH EDWARD

    IPC: H04L1/00 ,  H04L1/18

    CPC classification number: H04W76/045 ,  H04L1/003 ,  H04L1/009 ,  H04L1/1867

    Abstract: Systems and methods for subframe-based link adaptation for a radio signal in a cellular communications network (10) are disclosed. In one embodiment, a base station (14) obtains a hybrid automatic repeat request acknowledgement for data transmitted between the base station (14) and a mobile terminal (16) in a radio signal of the base station (14). The base station (14) then updates a parameter (e.g., SINR offset) used to control a Modulation and Coding Scheme (MCS) for transmission of data between the base station (14) and the mobile terminal (16) in the radio signal for one or more subframes in a frame structure of the radio signal based on the hybrid automatic repeat request acknowledgement. The one or more subframes are a subset of all of the subframes in the frame structure of the radio signal.

    Abstract translation: 公开了一种用于蜂窝通信网络（10）中无线电信号的基于子帧的链路自适应的系统和方法。 在一个实施例中，基站（14）在基站（14）的无线电信号中获得在基站（14）和移动终端（16）之间传输的数据的混合自动重传请求确认。 然后，基站（14）更新用于控制调制和编码方案（MCS）的参数（例如，SINR偏移量），用于在无线电信号中的基站（14）和移动终端（16）之间传输数据，用于 基于混合自动重传请求确认的无线电信号的帧结构中的一个或多个子帧。 一个或多个子帧是无线电信号的帧结构中的所有子帧的子集。

    METHOD AND APPARATUS FOR SOFT SYMBOL PROCESSING IN A COMMUNICATION RECEIVER
    9.
    发明申请
    METHOD AND APPARATUS FOR SOFT SYMBOL PROCESSING IN A COMMUNICATION RECEIVER 审中-公开
    通信接收机中软符号处理的方法和装置

    公开(公告)号：WO2013162440A3

    公开(公告)日：2014-01-16

    申请号：PCT/SE2013050221

    申请日：2013-03-12

    Applicant: ERICSSON TELEFON AB L M

    Inventor： SAMUEL BEBAWY MICHAEL ,  HUSS FREDRIK ,  WANG YI-PIN ERIC

    IPC: H03M13/00 ,  H03M13/41 ,  H03M13/45 ,  H04B1/707 ,  H04L27/18

    CPC classification number: H04L25/03012 ,  H04L1/005 ,  H04L25/03171 ,  H04L25/0328 ,  H04L27/38

    Abstract: 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.

    Abstract translation: 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复杂性，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/或改善了设计经济性。

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