Patent ID: 9209877
Filing Date: 2015-12-08
Classification: H04B,H04L,H04W

Abstract:
1. A method for determining a precoding matrix indicator, comprising: receiving a reference signal set sent by a base station; based on the reference signal set, selecting a precoding matrix from a codebook, the codebook at least comprising a non-constant modulus precoding matrix, the non-constant modulus precoding matrix at least comprising a non-constant modulus column vector, amplitude values of at least two elements of the non-constant modulus column vector forming a symmetrical sequence, wherein the non-constant modulus precoding matrix comprises a product of a diagonal matrix and a constant modulus matrix, and diagonal elements of the diagonal matrix are comprised of amplitude values of elements of the non-constant modulus column vector; sending a precoding matrix indicator to the base station, the precoding matrix indicator corresponding to the selected precoding matrix.