公开(公告)号：US09444570B1

公开(公告)日：2016-09-13

申请号：US13917453

申请日：2013-06-13

Applicant: Sprint Spectrum LP

Inventor： Nagi Mansour ,  Emerino J. Marchetti ,  Christopher Melus

IPC: H04B7/00 ,  H04J11/00

CPC classification number: H04J11/00 ,  H04L5/0026 ,  H04L5/0048

Abstract: Reference signals (a.k.a., pilot signals) are broadcast to aid in at least channel estimation, cell selection, and handover. When a multi-antenna mode (i.e., MIMO) is used data signals on one antenna should not interfere with reference signals on another antenna. Reference signal resource elements (a.k.a., slots) being broadcast from one antenna are multiplied by a first Walsh code and the data (or reference) signal resource elements being broadcast from another antenna are multiplied by second Walsh code in the same family. Multiplication by Walsh codes reduces or eliminates the correlation between the data resource elements on a first antenna and the reference signal resource elements simultaneously broadcast on a second antenna.

Abstract translation: 广播参考信号（a.k.a，导频信号）以帮助至少信道估计，小区选择和切换。 当使用多天线模式（即MIMO）时，一个天线上的数据信号不应该干扰另一个天线上的参考信号。 从一个天线广播的参考信号资源元素（a.k.a.，时隙）乘以第一沃尔什码，并且从另一个天线广播的数据（或参考）信号资源元素乘以同一系列中的第二沃尔什码。 沃尔什码的乘法减少或消除了第一天线上的数据资源元素与在第二天线上同时广播的参考信号资源元素之间的相关性。