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    • 14. 发明申请
    • METHOD AND APPARATUS FOR INTERFERENCE CANCELLATION IN A WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统干扰消除的方法和装置
    • WO2009137250A2
    • 2009-11-12
    • PCT/US2009/040755
    • 2009-04-16
    • MOTOROLA, INC.SUDARSHAN, PallavSTEWART, Kenneth, A.ZHUANG, Xiangyang
    • SUDARSHAN, PallavSTEWART, Kenneth, A.ZHUANG, Xiangyang
    • H04L25/03
    • H04L25/0204H04L5/0007H04L5/0048H04L25/021H04L25/0228H04L25/0242H04L27/2605H04L27/2647H04W72/085
    • A mobile device estimates a data symbol from a received signal by using one or more interference cancellation algorithms. For one interference cancellation algorithm, the mobile device calculates (302) a Channel State Information (CSI) of an interfering sector and calculates (304) a CSI of a serving sector at a different time. The mobile device then determines (310) a correction factor to the CSI of the interfering sector by, for example, estimating a Doppler speed and a time difference between a first time interval like a preamble symbol and a second time interval like any symbol of interest in the data zone. Using the correction factor, the mobile device updates outdated interference information. The mobile device can cancel interference in the received signal distorted by co-channel interference by using the updated interference information. Also, the mobile device can be configured to combine results of multiple interference cancellation algorithms based on the applicability of the individual interference cancellation algorithms in particular scenarios.
    • 移动设备通过使用一个或多个干扰消除算法从接收信号估计数据符号。 对于一种干扰消除算法,移动设备计算(302)干扰扇区的信道状态信息(CSI),并在不同时间计算(304)服务扇区的CSI。 然后,移动设备通过例如估计诸如前同步码符号的第一时间间隔和像感兴趣的符号之类的第二时间间隔之间的时间差来确定(310)对干扰扇区的CSI的校正因子 在数据区。 使用校正因子,移动设备更新过时的干扰信息。 移动设备可以通过使用更新的干扰信息来消除由同信道干扰失真的接收信号中的干扰。 此外,移动设备可以被配置为基于在特定情况下各个干扰消除算法的适用性来组合多个干扰消除算法的结果。
    • 16. 发明申请
    • PREDICTIVE POWER CONTROL IN A DIGITAL DIVERSITY RECEIVER
    • 数字多功能接收机中的预测功率控制
    • WO2006039041A1
    • 2006-04-13
    • PCT/US2005/031168
    • 2005-08-30
    • MOTOROLA INC.STEWART, Kenneth, A.KURBY, Christopher, N.
    • STEWART, Kenneth, A.KURBY, Christopher, N.
    • H04Q7/38
    • H04W52/40H04B7/0885
    • A method (300) and an apparatus (202) for a digital diversity receiver having a first receiver branch (204) and a second receiver branch (206) for adjusting a receiver power control loop during a radio frame (100) of a known length are provide. The digital diversity receiver (202) receives a first signal (208) through the first receiver branch (204) during the radio frame (100), and receives a second signal (210) through the second receiver branch (206) during a portion of the radio frame (106, 110). The second signal (210) originates from a common original signal (212) as the first signal 208. The digital diversity receiver (202) evaluates (308) a receiver power control parameter for the first interval (106) based upon the first signal (208) and the second signal (210), and compensates (310) the receiver power control parameter with an offset value for the first interval (106). The compensated receiver power control parameter is then applied (312) to the receiver power control loop during the first interval.
    • 一种用于数字分集接收机的方法(300)和装置(202),其具有第一接收器分支(204)和第二接收器分支(206),用于在已知长度的无线电帧(100)期间调整接收机功率控制回路 提供。 数字分集接收机(202)在无线帧(100)期间通过第一接收机分支(204)接收第一信号(208),并且在一部分时间段期间通过第二接收机分支(206)接收第二信号(210) 无线电帧(106,110)。 第二信号(210)起始于作为第一信号208的公共原始信号(212)。数字分集接收机(202)基于第一信号(106)评估(308)第一间隔(106)的接收机功率控制参数 208)和第二信号(210),并且用第一间隔(106)的偏移值补偿(310)接收机功率控制参数。 然后在第一间隔期间将补偿的接收机功率控制参数(312)应用于接收机功率控制回路。