Method and apparatus for receiving signal in integer forcing mimo system

Patent metadata

Field	Value
Publication number	US-2019158172-A1
Application number	US-201816192665-A
Country	US
Kind code	A1
Filing date	Nov 15, 2018
Priority date	Nov 21, 2017
Publication date	May 23, 2019
Grant date	—

Abstract

In an aspect of the present invention, it is disclosed a method for receiving a signal in integer-forcing (IF) Multiple-Input Multiple-Output (MIMO) system. The method includes receiving a plurality of reception signal vectors through a plurality of channels, performing an equalization for the plurality of reception signal vectors, performing a decoding for the plurality of reception signals in which the equalization is performed using a plurality of different reversible integer matrixes, and reconstructing a transmission signal from the reception signal in which the decoding is performed.

First claim

What is claimed is:

1 . A method for receiving a signal in an integer-forcing (IF) Multiple-Input Multiple-Output (MIMO) system, comprising:
receiving a plurality of reception signal vectors through a plurality of channels; performing an equalization for the plurality of reception signal vectors; performing a decoding for the plurality of reception signals in which the equalization is performed using a plurality of different reversible integer matrixes; and reconstructing a transmission signal from the reception signal in which the decoding is performed.

2 . The method for receiving a signal in an IF MIMO system of claim 1 , wherein the step of performing the decoding includes:
selecting different reversible integer matrixes for each channel block for the plurality of reception signals in which the equalization is performed.

3 . The method for receiving a signal in an IF MIMO system of claim 2 , wherein the step of selecting different reversible integer matrixes for each channel block includes:
selecting a reversible integer matrix that minimizes an arithmetic mean of an effective noise variation of an effective noise vector of the channel block.

4 . The method for receiving a signal in an IF MIMO system of claim 2 , wherein the step of selecting different reversible integer matrixes for each channel block includes:
selecting the reversible integer matrix using a lattice reduction for each channel block.

5 . The method for receiving a signal in an IF MIMO system of claim 4 , wherein the step of selecting the reversible integer matrix using a lattice reduction for each channel block includes:
selecting a reversible integer based matrix indicating a coefficient of an integer combination of codewords intended to be decoded for the plurality of reception signals in which the equalization is performed.

6 . The method for receiving a signal in an IF MIMO system of claim 5 , wherein the step of selecting the reversible integer matrix using a lattice reduction for each channel block includes:
inputting a first matrix computed by multiplying an arbitrary value associated with eigenvalue decomposition of the reversible integer matrix and the reversible integer based matrix as an input value of a lattice reduction algorithm, selecting a second matrix corresponding to a lattice reduction operation as an output value of the lattice reduction algorithm, and determining a reversible integer matrix for each channel based on the first and second matrixes.

7 . The method for receiving a signal in an IF MIMO system of claim 6 , wherein the step of selecting the reversible integer matrix using a lattice reduction for each channel block includes:
inputting a first matrix computed by multiplying an arbitrary value associated with eigenvalue decomposition of the reversible integer matrix and the reversible integer based matrix as an input value of a lattice reduction algorithm; selecting a second matrix corresponding to a lattice reduction operation as an output value of the lattice reduction algorithm; initializing the second matrix using an identity matrix; performing inner product and normalization for a plurality of different column vectors of the first matrix; finding and storing a multiple of a closest modulo value associated with the normalized column vector; performing a multiplication operation for a first column vector of the first matrix based on the stored multiple value and eliminating the same from a second column vector of the first matrix; storing the matrix in which the column elimination operation is performed as a second matrix; and determining a reversible integer matrix for each channel based on the second matrix.

8 . The method for receiving a signal in an IF MIMO system of claim 7 , wherein the step of determining a reversible integer matrix for each channel based on the second matrix includes:
selecting the plurality of reversible integer matrixes satisfying A 1 =A 2 = . . . =A M mod p (where, A i represents a reversible integer matrix, p represents a modulo value, and M represents a number of the plurality of reversible integer matrixes).

9 . A signal receiver in an integer-forcing (IF) Multiple-Input Multiple-Output (MIMO) system, comprising:
a receiving unit for receiving a plurality of reception signal vectors through a plurality of channels; an equalizing unit for performing an equalization for the plurality ofe reception signal vectors; a decoding unit for performing a decoding for the plurality of reception signals in which the equalization is performed using the plurality of different reversible integer matrixes; and a signal reconstruction unit for reconstructing a transmission signal from the reception signal in which the decoding is performed.

10 . The signal receiver in an IF MIMO system of claim 9 , wherein the decoding unit selects different reversible integer matrixes for each channel block for the plurality of reception signals in which the equalization is performed.

11 . The signal receiver in an IF MIMO system of claim 9 , wherein the decoding unit selects a reversible integer matrix that minimizes an arithmetic mean of an effective noise variation of an effective noise vector of the channel block.

12 . The signal receiver in an IF MIMO system of claim 9 , wherein the decoding unit selects the reversible integer matrix using a lattice reduction for each channel block.

13 . The signal receiver in an IF MIMO system of claim 12 , wherein the decoding unit selects a reversible integer based matrix indicating a coefficient of an integer combination of codewords intended to be decoded for the plurality of reception signals in which the equalization is performed.

14 . The signal receiver in an IF MIMO system of claim 13 , wherein the decoding unit inputs a first matrix computed by multiplying an arbitrary value associated with eigenvalue decomposition of the reversible integer matrix and the reversible integer based matrix as an input value of a lattice reduction algorithm, selects a second matrix corresponding to a lattice reduction operation as an output value of the lattice reduction algorithm, and determines a reversible integer matrix for each channel based on the first and second matrixes.

15 . The signal receiver in an IF MIMO system of claim 14 , wherein the decoding unit inputs a first matrix computed by multiplying an arbitrary value associated with eigenvalue decomposition of the reversible integer matrix and the reversible integer based matrix as an input value of a lattice reduction algorithm, selects a second matrix corresponding to a lattice reduction operation as an output value of the lattice reduction algorithm, initializes the second matrix using an identity matrix, performs inner product and normalization for a plurality of different column vectors of the first matrix, finds and stores a multiple of a closest modulo value associated with the normalized column vector, performs a multiplication operation for a first column vector of the first matrix based on the stored multiple value and eliminating the same from a second column vector of the first matrix, stores the matrix in which the column elimination operation is performed as a second matrix, and determines a reversible integer matrix for each channel based on the second matrix.

16 . The signal receiver in an IF MIMO system of claim 15 , wherein the decoding unit selects the plurality of reversible integer matrixes satisfying A 1 =A 2 = . . . =A M mod p (where, A i represents a reversible integer matrix, p represents a modulo value, and M represents a num

Assignees

• Postech Acad Ind Found

Inventors

• Yang Kyeong Cheol
• Yang Dae Yeol
• Cho Sung Hye

Classifications

• H04B7/0663 Primary

  using vector or matrix manipulations · CPC title

• H04B17/336

  Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] · CPC title

• H04B7/0842 Primary

  Weighted combining · CPC title

• H04B7/0473

  taking constraints in layer or codeword to antenna mapping into account · CPC title

• H04B17/3913

  Predictive models, e.g. based on neural network models · CPC title