Apparatus and method for channel feedback in multiple input multiple output system

摘要

An apparatus and a method for feeding a channel back in a wireless communication system using multiple input multiple output antennas (MIMO) are provided. The method includes receiving a signal from a transmitter and configuring a channel matrix for the received signal, configuring a basis transformed sparse channel using a sparsifying basis function with respect to the channel matrix, selecting a channel part to be fed back to the transmitter from the transformed sparse channel, and creating a codebook by quantizing the selected channel part, and feeding a codebook index corresponding to the created codebook back to the transmitter.

主权项

1. A method for feeding a channel back to a transmitter from a receiver in a multiple input multiple output (MIMO) system, the method comprising:
receiving a signal from the transmitter and configuring a channel matrix for the received signal; configuring a basis transformed sparse channel using a sparsifying basis function with respect to the channel matrix, the transformed sparse channel being divided into a dominant part and a non-dominant part; selecting a channel part to be fed back to the transmitter from the dominant part of the transformed sparse channel based on a channel compression; and creating a codebook by quantizing the selected channel part, and feeding a codebook index corresponding to the created codebook back to the transmitter.