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    • 3. 发明申请
    • IQ GAIN IMBALANCE SUPPRESSION IN PRESENCE OF UNKNOWN PHASE IMBALANCE
    • 智能增益不平衡抑制存在未知相位不平衡
    • WO2009016000A3
    • 2009-03-26
    • PCT/EP2008058767
    • 2008-07-07
    • ERICSSON TELEFON AB L MLINDOFF BENGTREIAL ANDRES
    • LINDOFF BENGTREIAL ANDRES
    • H04L27/38H03D3/00H04B1/12H04L27/00
    • H04L27/3863H03D3/009H04L2027/0024
    • A wireless communication system receiver compensates a received signal containing an IQ gain imbalance prior to performing frequency correction (32). The IQ imbalance in the signal is estimated after frequency correction, providing an IQ gain imbalance estimate (?n) for subsequent IQ gain imbalance compensation. The IQ gain imbalance estimation includes formulating (38) a plurality of hypotheses (Zt) of phase error between I and Q signal components, and taking as the actual phase error the hypothesis that yields the maximum power ratio between I and Q signal components. The maximum power ratio is differentiated with the respect to the IQ imbalance estimate. The IQ gain imbalance estimate is updated as a function of its prior value(s), the maximum power ratio, and the derivative of the maximum power ratio.
    • 无线通信系统接收机在执行频率校正之前补偿包含IQ增益不平衡的接收信号(32)。 在频率校正之后估计信号中的IQ不平衡,为随后的IQ增益不平衡补偿提供IQ增益不平衡估计(Δn)。 IQ增益不平衡估计包括制定(38)I和Q信号分量之间的相位误差的多个假设(Zt),并且将实际的相位误差作为产生I和Q信号分量之间的最大功率比的假设。 相对于IQ不平衡估计,最大功率比是不同的。 IQ增益不平衡估计作为其先前值,最大功率比和最大功率比的导数的函数进行更新。
    • 4. 发明申请
    • TECHNIQUE FOR ANCHOR CARRIER SELECTION IN A TELECOMMUNICATION SYSTEM
    • 电信系统中锚索选择的技术
    • WO2010088930A3
    • 2010-10-21
    • PCT/EP2009005861
    • 2009-08-12
    • ERICSSON TELEFON AB L MLINDOFF BENGTKAZMI MUHAMMAD
    • LINDOFF BENGTKAZMI MUHAMMAD
    • H04W36/06H04W36/30
    • H04W36/06H04W36/0055H04W36/30
    • The present disclosure relates to a technique for avoiding, forestalling, or reducing re-establishment procedures in a telecommunications system having multiple carriers. A method aspect of this technique includes monitoring a signal quality of an anchor component carrier associated with a serving cell of a mobile terminal and used by the mobile terminal. If the signal quality of the anchor component carrier violates a first signal quality condition, then a parameter (of, e.g., a downlink signal) of at least one candidate component carrier associated with the serving cell and distinct from the anchor component carrier is measured and the signal quality of the at least one candidate component carrier is determined based on the measured parameter. If the determined signal quality fulfils a second signal quality condition, then reselection to the at least one candidate component carrier is initiated such that the candidate component carrier becomes the anchor component carrier associated with the serving cell and used by the mobile terminal.
    • 本公开涉及一种用于在具有多个载波的电信系统中避免,预防或减少重新建立过程的技术。 该技术的方法方面包括监视与移动终端的服务小区相关联并由移动终端使用的锚分量载波的信号质量。 如果锚分量载波的信号质量违反第一信号质量条件,则测量与服务小区相关联且与锚分量载波不同的至少一个候选分量载波的参数(例如下行链路信号),并且 基于所测量的参数确定至少一个候选分量载波的信号质量。 如果确定的信号质量满足第二信号质量条件,则启动对至少一个候选分量载波的重选,使得候选分量载波变为与服务小区相关联并由移动终端使用的主分量载波。
    • 5. 发明申请
    • METHODS AND APPARATUS FOR IMPROVED RECEIVER PERFORMANCE IN HALF-DUPLEX WIRELESS TERMINALS
    • 提高半双工无线终端接收机性能的方法和设备
    • WO2009090170A3
    • 2009-11-05
    • PCT/EP2009050323
    • 2009-01-13
    • ERICSSON TELEFON AB L MLINDOFF BENGTMATTISSON SVEN
    • LINDOFF BENGTMATTISSON SVEN
    • H04L5/16H04B1/44
    • H04L5/16H04B1/44
    • A half-duplex mobile terminal having first and second receiver branches connected, during a receive mode, to respective antennas, is disclosed. One of the antennas is selectively connected to the first receiver branch or to a transmitter circuit. The first antenna is connected to the first receiver branch during a first interval, during which interval data is detected using outputs from both the first and second receiver branches. The first antenna is disconnected from the first receiver branch at the end of the first interval, and, during a second interval immediately following the first interval, data is detected using the output of the second receiver branch. A portion of the incoming transmission that arrives during the transition between the receive mode and transmit mode in a half-duplex transceiver is thus received and detected, improving performance of the half-duplex transceiver.
    • 公开了一种具有在接收模式期间连接到相应天线的第一和第二接收机分支的半双工移动终端。 其中一个天线选择性地连接到第一接收机分支或发射机电路。 第一天线在第一间隔期间连接到第一接收机分支,在第一间隔期间使用来自第一和第二接收机分支的输出来检测间隔数据。 第一天线在第一间隔结束时与第一接收机支路断开,并且在紧接第一间隔之后的第二间隔期间,使用第二接收机支路的输出检测数据。 因此接收并检测在半双工收发器中在接收模式和发送模式之间转换期间到达的输入传输的一部分,从而提高了半双工收发器的性能。
    • 6. 发明申请
    • DERIVATION OF OPTIMAL ANTENNA WEIGHTS DURING SOFT HANDOVER
    • 在软切换期间最佳天线权重的衍生
    • WO2006034792A8
    • 2007-07-12
    • PCT/EP2005010077
    • 2005-09-19
    • ERICSSON TELEFON AB L MLINDOFF BENGT
    • LINDOFF BENGT
    • H04B7/00H04W52/42
    • H04B7/0634H01Q3/2605H04B7/022H04B7/0654H04W36/08H04W36/18H04W52/42
    • Wireless communication method and system for improving optimal antenna weight derivation in transmit diversity mode during soft handover. The method and system use scale factors that depend on the reliability of the feedback information (FBI) detection on the uplink. Depending on FBI detections for each link, the scale factors are then applied to the downlink channel response estimates. FBI detection performance may be based on downlink antenna verification, downlink transmit power control command "up/down" ratio, or both. Poor antenna verification or a high number of "power up" commands on the uplink may indicate unreliable FBI detection. By applying higher scale factors to downlink channel responses corresponding to reliable FBI detection, better closed transmit diversity performance during soft handovers may be achieved. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    • 无线通信方法和系统,用于在软切换过程中改善发射分集模式中的最佳天线权重推导。 该方法和系统使用依赖于上行链路反馈信息(FBI)检测可靠性的比例因子。 根据每个链路的FBI检测,比例因子然后被应用于下行链路信道响应估计。 FBI检测性能可以基于下行天线验证,下行发射功率控制命令“上/下”比,或两者兼有。 上行链路上的差的天线验证或大量的“上电”命令可能表示不可靠的FBI检测。 通过对与可靠的FBI检测相对应的下行链路信道响应应用较高的比例因子,可以实现在软切换期间更好的封闭的发射分集性能。 提交本摘要的理解是,它不会用于解释或限制权利要求的范围或含义。
    • 10. 发明申请
    • TIME-ERROR AND FREQUENCY-ERROR CORRECTION IN A MULTI-CARRIER WIRELESS COMMUNICATIONS SYSTEM
    • 多载波无线通信系统中的时间误差和频率误差校正
    • WO2009127357A3
    • 2010-04-22
    • PCT/EP2009002634
    • 2009-04-09
    • ERICSSON TELEFON AB L MLINDOFF BENGTBERNHARDSSON BONORDSTROEM FREDRIK
    • LINDOFF BENGTBERNHARDSSON BONORDSTROEM FREDRIK
    • H04L27/00H04B1/00H04B1/38H04B1/40
    • H04L27/0014
    • Methods and apparatus for automatic frequency control in wireless receivers configured to simultaneously receive multiple carrier signals at distinct radio frequencies are disclosed. An exemplary wireless device comprises at least first and second radio front-end circuits configured to receive first and second wireless communication signals transmitted via first and second radio-frequency carriers at distinct first and second radio frequencies, respectively, a control processor configured to designate a master carrier signal and a slave carrier signal from among the received wireless communication signals, and a frequency error estimation circuit configured to estimate a first receiver frequency error using the received master carrier signal. The control processor is further configured to calculate a second receiver frequency error from the first receiver frequency error, for use in compensating one or more receiver processes performed on the slave carrier signal.
    • 公开了用于在不同射频同时接收多个载波信号的无线接收机中的自动频率控制的方法和装置。 示例性无线设备包括至少第一和第二无线电前端电路,其被配置为分别接收在不同的第一和第二无线电频率处经由第一和第二无线电频率载波发射的第一和第二无线通信信号,控制处理器被配置为指定 来自所接收的无线通信信号中的主载波信号和从载波信号;以及频率误差估计电路,被配置为使用所接收的主载波信号来估计第一接收机频率误差。 控制处理器还被配置为从第一接收机频率误差计算第二接收机频率误差,用于补偿对从属载波信号执行的一个或多个接收机处理。