Method and apparatus for receiving signal in integer forcing MIMO system

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 of reception signal vectors;
• a decoding unit for performing a decoding for the plurality of reception signals in which the equalization is performed using a 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,
• wherein the decoding unit is configured to select different reversible integer matrixes for each channel block for the plurality of reception signals in which the equalization is performed,
• wherein the decoding unit is configured to select the reversible integer matrix using a lattice reduction for each channel block,
• wherein the decoding unit is configured to select 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, and
• wherein the decoding unit is configured to input 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, select a second matrix corresponding to a lattice reduction operation as an output value of the lattice reduction algorithm, and determine a reversible integer matrix for each channel based on the first and second matrixes.

An integer-forcing (IF) Multiple-Input Multiple-Output (MIMO) system, comprising:

• a transmitter for transmitting a plurality of transmission signals through a plurality of channels;
• and
• a receiver for receiving a plurality of reception signal vectors through the 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,
• wherein the receiver for performing the decoding is configured to select different reversible integer matrixes for each channel block for the plurality of reception signals in which the equalization is performed,
• wherein the receiver configured to select different reversible integer matrixes for each channel block is configured to select the reversible integer matrix using a lattice reduction for each channel block, wherein the receiver configured to select the reversible integer matrix using a lattice reduction for each channel block is configured to select 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, and
• wherein the receiver configured to select the reversible integer matrix using a lattice reduction for each channel block is configured to input 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, select a second matrix corresponding to a lattice reduction operation as an output value of the lattice reduction algorithm, and determine a reversible integer matrix for each channel based on the first and second matrixes.