利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

12 条记录 (耗时 0.014 秒)

    SOFT-BIT GENERATION AND CHANNEL ESTIMATION FOR INTERFERENCE CANCELLATION USING DECODER OUTPUT
    1.
    发明公开
    SOFT-BIT GENERATION AND CHANNEL ESTIMATION FOR INTERFERENCE CANCELLATION USING DECODER OUTPUT 审中-公开
    SOFT-位的产生和信道估计的干扰减少使用解码器输出

    公开(公告)号：EP2834920A2

    公开(公告)日：2015-02-11

    申请号：EP13772174.2

    申请日：2013-03-14

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： JONSSON, Elias

    IPC分类号： H03M13/45 ,  H03M13/39 ,  H04L1/00 ,  H04B1/7115

    CPC分类号： H03M13/6337 ,  H03M13/2957 ,  H04L25/021 ,  H04L25/0212 ,  H04L25/0238 ,  H04L25/067

    摘要： Log-likelihood ratios produced by a decoder are incorporated into a soft symbol to soft bit estimation process and are used to perform improved channel estimation and impairment covariance estimation. In an example method, a plurality of soft bits and corresponding probability metrics for a series of received unknown symbols are generated. Estimates of the received unknown information symbols are then regenerated, as a function of the soft bits and corresponding probability metrics. An estimate of the average amplitude of the received unknown information symbols, or an estimate of the propagation channel response experienced by the received unknown information symbols, or both, are calculated, as a function of the regenerated symbol estimates. The results are applied to produce demodulated symbols for a second decoding iteration for the series of received unknown symbols.

    BLIND DETECTION OF MODULATION CONFIGURATION FOR INTERFERING SIGNALS
    3.
    发明公开
    BLIND DETECTION OF MODULATION CONFIGURATION FOR INTERFERING SIGNALS 有权
    干扰调制方案盲检测

    公开(公告)号：EP2839598A2

    公开(公告)日：2015-02-25

    申请号：EP13778844.4

    申请日：2013-03-14

    申请人： Telefonaktiebolaget L M Ericsson (Publ)

    发明人： JONSSON, Elias ,  UESAKA, Kazuyoshi

    IPC分类号： H04L1/00

    CPC分类号： H04B1/7115 ,  H04B1/7107

    摘要： Techniques are disclosed for determining which channelization codes are used for an interfering HS-PDSCH transmission without knowing whether a neighboring UE targeted by that transmission has had its 64QAM capability activated by higher layer signaling. The average amplitude is measured for each of several possible groups of channelization codes for each of one or more nearby UEs that might be the targets of interfering HS-PDSCH messages. Testing whether the amplitude is approximately the same across the codes in a possible combination of channelization codes yields a metric value that indicates whether that particular combination of codes is likely to be transmitted to a given UE. A second metric that detects the most likely modulation for possible groups of channelization codes is also calculated. The metrics are combined to determine which combination of channelization codes and modulation scheme is most likely being used for addressing the neighboring UE.

    METHOD AND APPARATUS FOR CORRECTING IQ IMBALANCE IN AN OFDM RECEIVER
    4.
    发明公开
    METHOD AND APPARATUS FOR CORRECTING IQ IMBALANCE IN AN OFDM RECEIVER 有权
    方法和设备，用于校正IQ失衡的OFDM接收机

    公开(公告)号：EP2156633A1

    公开(公告)日：2010-02-24

    申请号：EP08736515.1

    申请日：2008-04-23

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： JONSSON, Elias

    IPC分类号： H04L27/38 ,  H04L27/26

    CPC分类号： H04L27/2647 ,  H04L1/06 ,  H04L27/3863

    摘要： Methods and apparatus for processing received OFDM signals to compensate for distortions caused by IQ imbalances are disclosed. Receiver circuits may be configured to demodulate symbols from a first logical channel, using an uncompensated received OFDM signal that includes the effects of those distortions. Receiver circuits may be further configured to calculate an IQ imbalance parameter, using the demodulated symbols, for use in compensating the received OFDM signal to reduce the effects of the IQ imbalances. The compensated signal produced thereby may be used for demodulating symbols from a second logical channel, perhaps corresponding to a user data channel.

    CONFIGURATION OF WIRELESS RECEIVER
    7.
    发明公开
    CONFIGURATION OF WIRELESS RECEIVER 有权
    配置中的无线接收器

    公开(公告)号：EP2671324A1

    公开(公告)日：2013-12-11

    申请号：EP11702024.8

    申请日：2011-02-01

    申请人： Telefonaktiebolaget L M Ericsson (PUBL)

    发明人： JONSSON, Elias ,  BLANQUER, Eric ,  UESAKA, Kazuyoshi

    IPC分类号： H04B1/7097

    CPC分类号： H04B1/7097 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/7071

    摘要： 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.

    CHANNEL GEOMETRY DETECTOR
    8.
    发明公开
    CHANNEL GEOMETRY DETECTOR 有权
    道几何探测器

    公开(公告)号：EP2481162A2

    公开(公告)日：2012-08-01

    申请号：EP10776814.5

    申请日：2010-09-20

    申请人： Telefonaktiebolaget L M Ericsson (PUBL)

    发明人： CAIRNS, Douglas A. ,  NIEWCZAS, Jaroslaw ,  MURATA, Yoshitaka ,  JONSSON, Elias

    IPC分类号： H04B1/707

    CPC分类号： H04B1/712 ,  H04B2201/7071

    摘要： Adaptive reconfiguration of a wireless receiver is enabled based on channel geometry According to an embodiment, the wireless receiver includes a geometry factor processing module and signal processing modules, e.g. such as hut not limited to an SIR estimation module, a power estimation module, a despreading module, a low- pass filter, a combing weight generation module, a coefficient estimation module, a synchronization control channel interference canceller module, etc. The geometry factor processing module determines a geometry factor for the channel over which signals are transmitted to the wireless receiver, the geometry factor being a measure of the ratio of total transmitted power received by the wireless receiver to total interference plus noise power at the wireless receiver. One or more of the receiver signal, processing modules are reconfigurable based on the geometry factor.

    RECEIVER POWER REDUCTION METHODS AND APPARATUS
    10.
    发明公开
    RECEIVER POWER REDUCTION METHODS AND APPARATUS 审中-公开
    VERFAHREN UND VORRICHTUNG ZUR LEISTUNGSREDUZIERUNG BEI EINEMEMPFÄNGER

    公开(公告)号：EP2652992A1

    公开(公告)日：2013-10-23

    申请号：EP11790795.6

    申请日：2011-12-06

    申请人： Telefonaktiebolaget L M Ericsson (PUBL)

    发明人： GOPAL, Srikanth ,  BERGMAN, Göran ,  JONSSON, Elias

    IPC分类号： H04W52/02

    CPC分类号： H04W52/0245 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/24

    摘要： 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.

    摘要翻译： 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。