Wireless system, apparatus, and method for quantization of channel state information utilizing real and imaginary parts of a channel matrix

Abstract

A method for generating channel state information (CSI). The method includes determining the maximum amplitude of the real and imaginary parts of each element of a channel matrix, converting each maximum amplitude to a fixed-point value within a predefined range, determining a bit-shifting number for each maximum amplitude by comparing each fixed-point value with a series of predefined threshold values within the predefined range, quantizing the real and imaginary parts of each element of the channel matrix to an integer, and bit-shifting each of the quantized real and imaginary parts of each element of the channel matrix towards the most significant bit (MSB) by the corresponding bits and truncating the bit-shifted result to a predefined number of bits for generating channel state information (CSI) for use in communication.