Precoding processing method and user equipment

摘要

A precoding processing method and user equipment are disclosed. The precoding processing method includes: selecting a codebook vector for performing precoding processing for data among a codebook set of Nt antennas, where the codebook set includes a first codebook vector; [AB]
of a uniform linear array and a second codebook vector
; [A-B]
generated according to the first codebook vector, where A is a (Nt/2)×1 vector composed of a first half of elements of the first codebook vector, B is a (Nt/2)×1 vector composed of a last half of elements of the first codebook vector, and Nt is a positive even number; and sending an index number of the codebook vector to a base station, whereupon the base station uses the codebook vector corresponding to the index number to perform precoding processing for the data to be transmitted by the antennas. Embodiments of the present invention make the codebook set compatible with two types of antenna configuration modes.

主权项

1. A precoding processing method, comprising:
selecting, by a user equipment (UE), a codebook vector for performing precoding processing for data among a codebook set of Nt antennas, wherein the codebook set comprises a first codebook vector [AB]  and a second codebook vector [A-B]  generated according to the first codebook vector, A is a (Nt/2)×1 vector composed of a first half of elements of the first codebook vector, B is a (Nt/2)×1 vector composed of a last half of elements of the first codebook vector, and Nt is a positive even number; and sending, by the UE, an index number of the codebook vector to a base station; wherein: Nt=8, the codebook set comprises K codebooks where K is an integer, an 8×1 codebook vector [AB]  corresponding to K/2 codebooks in the K codebooks is respectively obtained by using an 8-dimensional discrete Fourier transformation codebook structure, and a number of discrete Fourier transformation groups is K/(2Nt); the codebook vector of the other K/2 codebooks in the K codebooks is [A-B],  where A is a vector composed of first 4 elements in the 8×1 codebook vector, and B is a vector composed of last 4 elements in the 8×1 codebook vector; and a codebook design of the first codebook vector [AB]  utilizes a discrete Fourier transformation codebook structure; wherein the discrete Fourier transformation codebook structure is as follows:ⅇm(g)=1M⁡[w0⁢m(g)…w(M-1)⁢m(g)]Twnm(g)=exp⁢{j⁢⁢2⁢π⁢⁢nM⁢(m+gG)} where superscript T represents a transpose operation, M is a number of dimensions of discrete Fourier transformation and M=8, with m=0, 1 . . . M−1 and n=0, 1 . . . M−1, G is the number of discrete Fourier transformation groups, with g=0, 1, . . . , G−1, and em(g) is a precoding vector in the codebook set, and wnm(g) represents elements in em(g).