利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

15 条记录 (耗时 0.014 秒)

    FREQUENCY ESTIMATION
    1.
    发明公开
    FREQUENCY ESTIMATION 审中-公开
    频率估计

    公开(公告)号：EP3195544A1

    公开(公告)日：2017-07-26

    申请号：EP15724391.6

    申请日：2015-05-06

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： WANG, Yi-Pin Eric ,  WILHELMSSON, Leif ,  HAGERMAN, Bo ,  KHAYRALLAH, Ali S. ,  SAMUEL BEBAWY, Michael

    IPC分类号： H04L27/00

    CPC分类号： H04L27/2665 ,  H04B1/0475 ,  H04L27/0014 ,  H04L27/265 ,  H04L2025/03394 ,  H04L2027/0034 ,  H04L2027/0087 ,  H04W72/0446

    摘要： A frequency deviation estimator (20, 40) estimates an instantaneous frequency deviation in a received signal that includes pilot sub-blocks non-contiguously distributed in time across a radio block. Each pilot sub-block comprising one or more pilot symbols. The estimator (20, 40) is configured to select, from the pilot sub-blocks non-contiguously distributed in time across the radio block, a particular pilot sub-block for which to obtain an instantaneous frequency deviation estimate. The estimator (20, 40) applies a Fast Fourier Transform (FFT) or a Discrete Fourier Transform (DFT) to a set of contiguous received signal samples that spans multiple ones of the pilot sub-blocks, including the particular pilot sub-block as well as one or more assisting pilot sub-blocks neighboring that particular pilot sub-block. The estimator (20, 40) then obtains an instantaneous frequency deviation estimate for the particular pilot sub-block based on the resulting FFT or DFT outputs.

    摘要翻译： 频率偏差估计器（20,40）估计接收信号中的瞬时频率偏差，所述接收信号包括通过无线电块在时间上不连续分布的导频子块。 每个导频子块包括一个或多个导频符号。 估计器（20,40）被配置为从跨越无线电块时间上不连续分布的导频子块中选择要获得瞬时频率偏差估计的特定导频子块。 估计器（20,40）对跨越导频子块中的多个导频子块的一组连续接收信号采样应用快速傅立叶变换（FFT）或离散傅里叶变换（DFT），所述多个导频子块包括特定导频子块作为 以及与该特定导频子块相邻的一个或多个辅助导频子块。 估计器（20,40）然后基于所得到的FFT或DFT输出获得特定导频子块的瞬时频率偏差估计。

    POWER CONTROL OF UPLINK CONTROL CHANNELS IN HETEROGENEOUS NETWORKS
    5.
    发明公开
    POWER CONTROL OF UPLINK CONTROL CHANNELS IN HETEROGENEOUS NETWORKS 有权
    LEISTUNGSSTEUERUNG VON UPLINK-STEUERKANÄLEN异构体网络

    公开(公告)号：EP2995138A1

    公开(公告)日：2016-03-16

    申请号：EP14794064.7

    申请日：2014-05-09

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： LARSSON, Erik ,  VON WRYCZA, Peter ,  SAMUEL BEBAWY, Michael ,  WANG YP, Eric

    IPC分类号： H04W52/24 ,  H04W52/38 ,  H04W52/40

    CPC分类号： H04W52/241 ,  H04W52/08 ,  H04W52/12 ,  H04W52/146 ,  H04W52/286 ,  H04W52/325 ,  H04W52/40 ,  H04W72/042 ,  H04W84/045

    摘要： A network node of a wireless communication network serves a wireless device that is transmitting one or more uplink channels to each of a serving cell and at least one non-serving cell. Inner-loop power control, ILPC, commands are sent (420) to the wireless device in such a way that only ILPC commands transmitted by the serving cell affect the power of one or more control channels transmitted by the wireless device to the serving cell. In addition, a power offset for a data channel transmitted by the wireless device to the at least one non-serving cell is adjusted (430), so as to compensate for an uplink-downlink power imbalance among the serving cell and the at least one non-serving cell.

    摘要翻译： 无线通信网络的网络节点服务于向服务小区和至少一个非服务小区中的每一个发送一个或多个上行链路信道的无线设备。 将内环功率控制，ILPC，命令以这样的方式被发送（420）到无线设备，使得仅由服务小区发送的ILPC命令影响由无线设备向服务小区发送的一个或多个控制信道的功率。 此外，调整由无线装置向至少一个非服务小区发送的数据信道的功率偏移（430），以补偿服务小区与至少一个小区之间的上行链路 - 下行链路功率不平衡 非服务小区。

    CHIP-LEVEL PROCESSING FOR JOINT DEMODULATION IN CDMA RECEIVERS
    7.
    发明公开
    CHIP-LEVEL PROCESSING FOR JOINT DEMODULATION IN CDMA RECEIVERS 审中-公开
    处理芯片中的层次FOR COMMON解调的CDMA接收机

    公开(公告)号：EP2847870A1

    公开(公告)日：2015-03-18

    申请号：EP13723688.1

    申请日：2013-04-29

    申请人： Telefonaktiebolaget LM Ericsson (Publ)

    发明人： REIAL, Andres ,  GRANT, Stephen ,  SAMUEL BEBAWY, Michael ,  WANG, Yi-Pin Eric

    IPC分类号： H04B1/7097 ,  H04B1/7105

    CPC分类号： H04B1/7105 ,  H04B1/7097 ,  H04B1/71052 ,  H04B1/71057 ,  H04L25/03331

    摘要： A CDMA multi-code joint demodulation solution in which impairment suppression and channel matching operations are performed prior to despreading. Embodiments include a linear front end that performs chip-level suppression of signal components that are not included in a subsequent joint demodulation process. The pre-processing stage also carries out metric preparation and provides a vector decision statistic that is processed by a joint demodulation stage to extract per-code soft values for the symbols of interest in the received signal. Both code-specific and code-averaged versions of the linear processing are disclosed, as are several front-end configurations with equivalent performance, but different complexity trade-offs. These new approaches use a block formulation, requiring a set of input chip samples as an input, and perform all operations as matrix-vector multiplications, which is an approach amenable to efficient DSP or hardware implementation.

    EFFICIENT GENERATION OF SPREADING SEQUENCE CORRELATIONS USING LOOKUP TABLES
    9.
    发明公开
    EFFICIENT GENERATION OF SPREADING SEQUENCE CORRELATIONS USING LOOKUP TABLES 有权
    EFFIZIENTE ERZEUGUNG VON SPREIZSEQUENZKORRELATIONEN MIT SUCHTABELLEN

    公开(公告)号：EP2920888A1

    公开(公告)日：2015-09-23

    申请号：EP12888370.9

    申请日：2012-11-16

    申请人： Telefonaktiebolaget LM Ericsson (PUBL)

    发明人： JOHANSSON, Niklas ,  WANG, Yi-Pin Eric ,  GRANT, Stephen ,  HE, Ning ,  SAMUEL BEBAWY, Michael

    IPC分类号： H04B1/709

    CPC分类号： H04B1/709

    摘要： A signal is received containing a block of multiple symbols, each symbol containing information bits spread by a spreading sequence of chips. Each spreading sequence is determined by a channelization sequence and a first or second complex- valued scrambling sequence of chips. Each block is processed using a set of spreading sequences using correlations between pairs of spreading sequences in the set. Spreading sequence correlation values between each pair are manipulated and stored in lookup tables. A lookup table address is determined using a first set of reduced basic scrambling bits to retrieve correlation values. The first set of reduced basic scrambling bits is based on manipulation of one set of the basic scrambling bits that reduces a number of bits included in the determined address to less than a number of binary values in the one set of basic scrambling bits. The one set of basic scrambling bits is used to construct one of the first and second complex-valued scrambling sequences. The retrieved correlation values may be used in mitigating spreading sequence correlation interference between spreading sequences in the set.

    摘要翻译： 接收到包含多个符号的块的信号，每个符号包含由码片的扩展序列扩展的信息比特。 每个扩展序列由信道化序列和码片的第一或第二复数加扰序列确定。 使用组合中的扩展序列对之间的相关性，使用一组扩展序列处理每个块。 每对之间的扩展序列相关值被操纵并存储在查找表中。 使用第一组减少的基本加扰比特来确定查找表地址以检索相关值。 第一组减少的基本加扰比特是基于一组基本加扰比特的操作，这些基本加扰比特将包括在所确定的地址中的比特数减少到一组基本加扰比特中的二进制值的数量。 一组基本加扰比特用于构造第一和第二复值加扰序列之一。 检索的相关值可用于减轻该组中扩展序列之间的扩展序列相关干扰。

    SYMBOL-LEVEL CODE-SPECIFIC JOINT DETECTION FOR CDMA RECEIVERS
    10.
    发明公开
    SYMBOL-LEVEL CODE-SPECIFIC JOINT DETECTION FOR CDMA RECEIVERS 审中-公开
    代码的特定链路检测ON LEVEL符号CDMA接收机

    公开(公告)号：EP2847871A1

    公开(公告)日：2015-03-18

    申请号：EP13718597.1

    申请日：2013-04-29

    申请人： Telefonaktiebolaget LM Ericsson (Publ)

    发明人： GRANT, Stephen ,  SAMUEL BEBAWY, Michael

    IPC分类号： H04B1/712 ,  H04B1/7105

    CPC分类号： H04B1/71052 ,  H04B1/712

    摘要： Techniques are disclosed for processing a received spread spectrum signal containing multiple signals of interest and one or more interfering signals with known spreading codes. An example method begins with the generation of a despread signal vector for each signal of interest, for a given symbol time, using a corresponding group of correlators for each of the signals of interest. The method continues with the calculating of a covariance matrix for the given symbol time, the covariance matrix representing impairment correlations among the correlators from sources other than the signals of interest, as well as from inter-symbol interference in and among the signals of interest. The covariance matrix includes diagonal blocks that each represent impairment correlations among a single one of the groups of correlators; the diagonal blocks are calculated based on first terms that account in a code-specific manner for same-symbol-time interference from each of the interfering signals.