Method of codebook design and precoder feedback in wireless communication systems
First Claim
1. A method for a wireless communication device to send a precoder matrix information to a base station, the method comprising:
- the wireless communication device sending a first representation of a first matrix chosen from a first codebook, wherein the first matrix is a N-by-N diagonal matrix with the k-th diagonal elements being σ
1*exp(jπ
(k−
1)m/N), for k from 1 to N/2 and being σ
2*exp(jπ
(k−
N/2−
1)m/N) for k from N/2+1 to N, N being a number of antennas, m is an integer between 0 and N-1, and σ
1, σ
2 being complex valued scalars;
the wireless communication device sending a second representation of a second N-by-R matrix chosen from a second codebook, with R being a number of spatial layers;
wherein the first representation and the second representation together convey a precoder matrix as a matrix product of the first matrix and the second matrix.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for two component feedback in wireless communication systems wherein a wireless communication device sends a first representation of a first matrix chosen from a first codebook, the first matrix is a N-by-N diagonal matrix with the k-th diagonal elements being σ1*exp(jπ(k−1)m/N), for k from 1 to N/2 and being σ2*exp(jπ(k−N/2−1)m/N) for k from N/2+1 to N, N is a number of antennas, m is an integer between 0 and N−1, and σ1, σ2 are complex valued scalars. The device also sends a second representation of a second N-by-R matrix chosen from a second codebook, with R being a number of spatial layers wherein the first and second representations together convey a precoder matrix as the matrix product of the first and second matrices.
59 Citations
20 Claims
-
1. A method for a wireless communication device to send a precoder matrix information to a base station, the method comprising:
-
the wireless communication device sending a first representation of a first matrix chosen from a first codebook, wherein the first matrix is a N-by-N diagonal matrix with the k-th diagonal elements being σ
1*exp(jπ
(k−
1)m/N), for k from 1 to N/2 and being σ
2*exp(jπ
(k−
N/2−
1)m/N) for k from N/2+1 to N, N being a number of antennas, m is an integer between 0 and N-1, and σ
1, σ
2 being complex valued scalars;the wireless communication device sending a second representation of a second N-by-R matrix chosen from a second codebook, with R being a number of spatial layers; wherein the first representation and the second representation together convey a precoder matrix as a matrix product of the first matrix and the second matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification