公开(公告)号：US07161896B1

公开(公告)日：2007-01-09

申请号：US10217117

申请日：2002-08-12

申请人： Brian Hart ,  John D O'Sullivan

发明人： Brian Hart ,  John D O'Sullivan

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2647 ,  H04L25/0228

摘要： A method and apparatus for estimating channel characteristics in a multicarrier wireless receiver such as an OFDM wireless receiver. The method includes determining a channel estimate for each of a set of subcarriers by receiving multicarrier data as a result of a wireless transmission of data that includes a known signal, wherein the determining uses a part of the received data that corresponds to the known signal. The method further includes smoothing the channel estimates according to a smoothing filter to form smoothed channel estimates. The smoothed channel estimate for a particular subcarrier includes a contribution from the channel estimates of the particular subcarrier's one or more immediate neighbors to take advantage of correlation that may exist between the particular subcarrier's channel and the channels of that subcarrier's one or more immediate neighbors. In one version, the transmitted data includes at least one additional known signal, and each smoothed channel estimate is a smoothed version of the average of sets of channel estimates. In such a version, each set of channel estimates is determined using a respective part of the received data that corresponds to a corresponding one of the known signals.

摘要翻译： 用于估计诸如OFDM无线接收机的多载波无线接收机中的信道特性的方法和装置。 该方法包括通过作为包括已知信号的数据的无线传输的结果接收多载波数据来确定一组子载波中的每一个的信道估计，其中确定使用与已知信号相对应的接收数据的一部分。 该方法还包括根据平滑滤波器平滑信道估计以形成平滑信道估计。 对于特定子载波的平滑信道估计包括来自特定子载波的一个或多个立即邻居的信道估计的贡献，以利用可能存在于特定子载波的信道和该子载波的一个或多个直接邻居的信道之间的相关性。 在一个版本中，传输的数据包括至少一个附加的已知信号，并且每个平滑的信道估计是信道估计的平均值的平滑版本。 在这样的版本中，使用对应于已知信号中的相应一个的接收数据的相应部分来确定每组信道估计。