Device and method for generating precoding matrix, and storage medium

Patent metadata

Field	Value
Publication number	US-10038482-B2
Application number	US-201515513742-A
Country	US
Kind code	B2
Filing date	Feb 3, 2015
Priority date	Sep 24, 2014
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

The disclosure discloses a device for generating a precoding matrix. The device includes: a parameter calculator, a counter and an element generating module. The parameter calculator is configured to calculate, according to a first Precoding Matrix Identifier (PMI) and a second PMI, a first parameter and a second parameter used for determining a precoding matrix, and send the first parameter and the second parameter to the element generating module. The counter is configured to control the row numbers of elements in the precoding matrix that are generated by the element generating module. The element generating module is configured to generate the elements corresponding to the row numbers in the precoding matrix according to the received first parameter and second parameter and the row numbers. The disclosure also discloses a method for generating a precoding matrix, and a storage medium.

First claim

What is claimed is:

1. A device for generating a precoding matrix, comprising: a parameter calculator, a counter and an element generator; wherein,
the parameter calculator is arranged to calculate, according to a first Precoding Matrix Identifier (PMI) and a second PMI, a first parameter and a second parameter for determining the precoding matrix, and send the first parameter and the second parameter to the element generator;
the counter is arranged to control a row number of an element in the precoding matrix that is to be generated by the element generator; and
the element generator is arranged to generate the element corresponding to the row number in the precoding matrix according to the received first parameter and second parameter and the row number.

2. The device for generating a precoding matrix according to claim 1 , wherein the element generator comprises: a first lookup table unit, a second lookup table unit, a first lookup table address unit, and an element output control unit; wherein,
he first lookup table unit is arranged to store values of elements from a zeroth row to a third row in the precoding matrix calculated in advance, obtain, according to a base address input by the first lookup table address unit, a value of the corresponding element and output the value of the corresponding element;
the second lookup table unit is arranged to store values of an operator influencing elements from a fourth row to a seventh row in the precoding matrix calculated in advance, inquire a value of the operator according to the second parameter, calculate product of the value of the element output by the first lookup table unit and the value of the operator, and send the product to the element output control unit as the value of the corresponding element from the fourth row to the seventh row in the precoding matrix;
the first lookup table address unit is arranged to generate the base address of the first lookup table unit according to the first parameter and the row number, and send the base address to the first lookup table unit; and
the element output control unit is arranged to receive inputs of the first lookup table unit and the second lookup table unit, and output, according to the row number input by the counter, the element of the precoding matrix corresponding to the row number.

3. The device for generating a precoding matrix according to claim 2 , wherein the first lookup table address unit is implemented by a four-to-one multiplexer.

4. The device for generating a precoding matrix according to claim 2 , wherein the element output control unit is implemented by a two-to-one multiplexer.

5. The device for generating a precoding matrix according to claim 1 , wherein the precoding matrix is:

W

m
,
n

(
1
)

=

1

8

⁡

[

v
m

ϕ
n

⁢

v
m

]

,

where
⁢

⁢

v
m

=

[

1

e

j
⁢

⁢
2
⁢
π
⁢

⁢

m
/
32

e

j
⁢

⁢
4
⁢
π
⁢

⁢

m
/
32

e

j
⁢

⁢
6
⁢
π
⁢

⁢

m
/
32

]

T

,

ϕ n =e jπn/2 , e is a natural number, π is Pi, and parameters m and n are calculated by a Long Term Evolution (LTE) terminal according to the first PMI and the second PMI.

6. A method for generating a precoding matrix, executed by a Long Term Evolution (LTE) terminal, the method comprising:
calculating a first parameter and a second parameter for determining the precoding matrix according to a first Precoding Matrix Identifier (PMI) and a second PMI;
controlling a row number of an element

Assignees

• Sanechips Tech Co Ltd

Inventors

• Zhai Chunhua
• Wang Xinmin

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 Primary

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

• H04B7/0478

  Special codebook structures directed to feedback optimisation · CPC title

• H04L25/0391 Primary

  construction details of matrices · CPC title