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    • 2. 发明公开
    • ADAPTIVE SMOOTHING OF CHANNEL ESTIMATES
    • 自适应GLÄTTUNGVONKANALSCHÄTZUNGEN
    • EP2901639A4
    • 2016-05-18
    • EP13840648
    • 2013-09-27
    • ERICSSON TELEFON AB L M
    • MORÉN LENNARTREIAL ANDRES
    • H04L25/02
    • H04L25/0204H04L25/0214H04L25/022H04L25/0222
    • Techniques for directly adapting the parameters of a smoothing filter used for channel estimation to the current velocity and signal-to-noise ratio (SNR) situation. An example method begins with a plurality of channel response measurements. For each of a first subset of a set of pre-determined filter responses, the channel measurement samples are filtered to obtain a corresponding set of estimated channel response samples. Next, for each set of estimated channel response samples, a corresponding set of ordered residuals are calculated from the channel measurement samples. Each set of ordered residuals is evaluated to determine a measure of correlation among the ordered residuals, and an updated filter response is selected from a second subset of the set of pre-determined filter responses, based on this evaluation, for use in demodulating a received signal.
    • 用于将用于信道估计的平滑滤波器的参数直接适应于当前速度和信噪比(SNR)情况的技术。 示例性方法以多个信道响应测量开始。 对于一组预定的滤波器响应的第一子集中的每一个,对信道测量样本进行滤波以获得相应的一组估计的信道响应样本。 接下来,对于每组估计的信道响应样本,从信道测量样本计算相应的有序残差集合。 评估每组有序残差以确定有序残差之间的相关性的度量,并且基于该评估从所述预定滤波器响应集合的第二子集中选择更新的滤波器响应,以用于解调所接收的 信号。