Differential codebook for temporally-correlated MISO dual-polarization antenna

Patent metadata

Field	Value
Publication number	US-8953707-B2
Application number	US-201213656075-A
Country	US
Kind code	B2
Filing date	Oct 19, 2012
Priority date	Oct 19, 2012
Publication date	Feb 10, 2015
Grant date	Feb 10, 2015

Abstract

A code word selection method performed by a User Equipment (UE) in a wireless communication system is provided. The method includes generating a rotation matrix using previously selected codeword; generating a new differential code book using the rotation matrix and a differential code book; selecting a code word from the new differential code book; and performing data transmission using the selected code word.

First claim

What is claimed is:

1. A method for selecting a codeword in a wireless communication system, the method comprising:
selecting a codeword from a code book;
generating a rotation matrix using the selected codeword, the rotation matrix being rotated based on a polar cap differential code book;
generating a new differential code book using the rotation matrix and the polar cap differential code book;
selecting a codeword from the new differential code book; and
performing data transmission using the selected codeword.

2. The method of claim 1 , further comprising:
repeating generation of the rotation matrix;
generating another new differential code book according to the repeated generation of the rotation matrix; and
selecting a codeword from the another new differential code book.

3. The method of claim 2 , further comprising:
resetting every codeword from the polar cap differential code book when a preset condition is satisfied.

4. The method of claim 2 , wherein generating the rotation matrix comprises generating the rotation matrix according to a rank.

5. The method of claim 1 , wherein the new differential code book includes combination of codewords

ⅇ

j
⁢

π
2

,

ⅇ

j
⁢

π
4

,

ⅇ

j
⁢

π
8

,

ⅇ

j
⁢

π
16

,

ⅇ

j
⁢

π
32

,

and 1, or scaled variation thereof.

6. A method for selecting a codeword by an enhanced Node B(eNB) in a wireless communication system, the method comprising:
generating a rotation matrix using a previously selected codeword, the rotation matrix being rotated based on a polar cap differential code book;
generating a new differential code book using the rotation matrix and the polar cap differential code book;
selecting a codeword from the new differential code book; and
performing data transmission using the selected codeword.

7. An apparatus for selecting a codeword in a wireless communication system, comprising:
a controller configured to select a codeword from a code book, generate a rotation matrix using the selected codeword, update a new differential code book using the rotation matrix and a polar cap differential code book, and select a codeword from the new differential code book, the rotation matrix being rotated based on the polar cap differential code book;
a transceiver configured to perform data transmission using the selected codeword; and
a storage configured to store the new differential code book.

8. The apparatus of claim 7 , wherein the controller further configured to repeat generation of the rotation matrix, generate another new differential code book according to the repeated generation of the rotation matrix, and select a codeword from the another new differential code book.

9. The apparatus of claim 8 , wherein the controller further configured to reset every codeword from the polar cap differential code book when a preset condition is satisfied.

10. The apparatus of claim 8 , wherein generating the rotation matrix is generated according to a rank.

11. The apparatus of claim 7 , wherein the new differential code book includes combination of codewords

ⅇ

j
⁢

π
2

,

ⅇ

j
⁢

π
4

,

ⅇ

j
⁢

π
8

,

ⅇ

j
⁢

π
16

,

ⅇ

j
⁢

π
32

,

and 1, or scaled variation thereof.

Assignees

• Samsung Electronics Co Ltd
• Purdue Research Foundation
• Samsung Electronics Co Ltd

Inventors

• Ro Sangmin
• Choi Junil
• Love David J
• Lee Juho

Classifications

• H04B7/0639

  Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection · CPC title

• H04B7/0456

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title

• H04B7/0482

  Adaptive codebooks · CPC title

• H04B7/0469 Primary

  taking special antenna structures, e.g. cross polarized antennas into account · CPC title