Patent ID: 8705638
Filing Date: 2014-04-22
Classification: H04B,H04L

Abstract:
1. A method for signal transmission, comprising: a user equipment (UE) calculating a mean squared error (MSE) of a first layer of signal and an MSE of a second layer of signal; the UE selecting a pre-coding matrix from a plurality of pre-coding matrices according to the sum of the MSE of the first layer of signal and the MSE of the second layer of signal; and the UE informing a base station to use the selected pre-coding matrix to transmit signals, wherein the UE selecting a pre-coding matrix from a plurality of pre-coding matrices according to the sum of the MSE of the first layer of signal and the MSE of the second layer of signal comprises: wherein the UE selects a pre-coding matrix which enables the noise of a layer of signal with good channel to be minimized from the plurality of pre-coding matrices according to the formula of: