公开(公告)号：EP1327311A2

公开(公告)日：2003-07-16

申请号：EP01987972.5

申请日：2001-10-16

申请人： QUALCOMM INCORPORATED

发明人： BUTLER, Brian, K. ,  ZHANG, Haitao ,  BENDER, Paul, E. ,  JOU ,Yu-Cheun

IPC分类号： H04B1/707

CPC分类号： H04B1/7107

摘要： Techniques for canceling pilot interference in a wireless (e.g., CDMA) communication system. A received signal typically includes a number of signal instances (i.e., multipaths). For each multipath desired to be processed, the other multipaths act as interference on the desired multipath. If the pilot is generated based on a known data pattern (e.g., all zeros) and covered with a known channelization code (e.g., a Walsh code of zero), then the pilot in an interfering multipath may be estimated as the spreading sequence at a time offset corresponding to the arrival time of that multipath. The pilot interference from each interference multipath may be estimated based on the spreading sequence for the interfering multipath and the despreading sequence for the desired multipath. The total pilot interference from a number of interfering multipaths may be subtracted from the data component in the desired multipath to provide pilot-canceled data having improved performance.

摘要翻译： 用于消除无线（例如，CDMA）通信系统中的导频干扰的技术。 接收的信号通常包括多个信号实例（即，多路径）。 对于需要处理的每个多路径，其他多路径对期望的多路径起干扰作用。 如果基于已知数据模式（例如，全零）生成导频并且用已知信道化码（例如，零的沃尔什码）覆盖导频，则可以将干扰多径中的导频估计为 时间偏移对应于该多路径的到达时间。 可以基于干扰多径的扩频序列和期望多径的解扩序列来估计来自每个干扰多径的导频干扰。 可以从所需多径中的数据分量中减去来自多个干扰多径的总导频干扰，以提供具有改进性能的导频消除数据。