Patent ID: 8693522
Filing Date: 2014-04-08
Classification: H04B,H04L

Abstract:
1. A method for performing estimation by using dedicated pilots, comprising: receiving, by a user equipment (UE), a first set of dedicated pilots sent by a network side; performing descrambling on the first set of dedicated pilots; performing, according to a spreading code of the first set of dedicated pilots, despreading on the first set of dedicated pilots, wherein the spreading code is used to implement at least one of the following: (a) performing spreading on at least two signature sequences, wherein each signature sequence of the at least two signature sequences is used as a dedicated pilot of at least one data stream of each UE of at least two UEs; and (b) performing spreading on the at least two signature sequences, wherein each signature sequence of the at least two signature sequences is used as dedicated pilots of at least two data streams of at least one UE; obtaining a second set of dedicated pilots that belong to different data streams; and obtaining a precoding matrix or calculating a composite channel matrix by using the first set of dedicated pilots and the at least two signature sequences sent by the network side; wherein the composite channel matrix is a product of a channel matrix of all receive antennas of the UE and a precoding matrix of all the data streams of the UE.