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2. 发明申请

WO2008115898A3 FREQUENCY DOMAIN EQUALIZATION FOR TIME VARYING CHANNELS 审中-公开
标题翻译：用于时间变化通道的频域均衡
公开(公告)号：WO2008115898A3
公开(公告)日：2009-02-05
申请号：PCT/US2008057291
申请日：2008-03-17
申请人： QUALCOMM INC , HONG EEN-KEE , NAM TRAN LE , GAAL PETER
发明人： HONG EEN-KEE , NAM TRAN LE , GAAL PETER
IPC分类号： H04L25/02 , H04L25/03
CPC分类号： H04L25/0202 , H04L25/0222 , H04L25/03159 , H04L25/03292 , H04L2025/03541 , H04L2025/03617
摘要： Systems and methods for a wireless communication system are provided. The method includes estimating a time-variation of a channel through which the wireless communication system transmits. This also includes decreasing the estimated time-variation of the channel from a signal transmitted by the wireless communications system. An iterative process and components are provided to allow efficient and accurate frequency domain equalization. Various processing components remove or mitigate components of channel variation and recovers a circular convolution, in order that frequency domain equalization (FDE) structures developed for static channels become effective in time-varying channels. For time varying channels, a vector is determined which represents a degradation of the corresponding equivalence between the time domain and the frequency domain which is relied upon by the frequency domain equalization. Thus, a time variation cancellation process is performed where said vector is iteratively subtracted from the frequency domain equalization. In this manner, frequency domain equalization performance is improved in the presence of time varying channels.
摘要翻译：提供了一种用于无线通信系统的系统和方法。该方法包括估计无线通信系统通过其发送的信道的时间变化。这还包括从由无线通信系统发送的信号中减少信道的估计时间变化。提供了迭代过程和组件以允许有效和准确的频域均衡。各种处理组件去除或减轻信道变化的分量并恢复循环卷积，以便为静态信道开发的频域均衡（FDE）结构在时变信道中变得有效。对于时变信道，确定一个矢量，其表示由频域均衡所依赖的时域和频域之间的相应等效性的劣化。因此，执行时间变化消除处理，其中从频域均衡中迭代地减去所述向量。以这种方式，在时变信道的存在下，频域均衡性能得到改善。

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