Apparatus and method for estimating the number of optimal iterations based on downlink massive MIMO System

摘要

The present invention relates to an apparatus and method for estimating the optimal number of repetitions of GS precoding based on a downlink large-capacity MIMO system. According to the present invention, in the method for estimating the optimal number of repetitions using an apparatus for estimating the optimal number of repetitions for GS precoding, a GS symbol for the symbol is calculated based on a GS precoding technique that repeatedly updates a symbol to be transmitted, Increasing i by one from 1 to obtain a GS symbol in the current i-th step, and calculating a Euclidean distance between the GS symbol obtained in the i-th step and the GS symbol obtained in the previous i-1 step, and , Normalizing the Euclidean distance based on the Euclidean distance accumulated to date, comparing the normalized Euclidean distance with a preset threshold, and the normalized obtained in the i-th step. It provides a method for estimating the optimal number of repetitions, including repeating GS precoding until the Euclidean distance converges below the threshold. According to the present invention, by determining the optimal number of repetitions used in GS precoding with low complexity before transmitting data in a downlink large-capacity MIMO system, the optimal number of repetitions through GS precoding is performed even in an arbitrary environment. You can get error performance.