Design and analysis of preprocessing techniques for multi user MIMO communications

Abstract

In the wireless communication spectrum and power required for the transmission of the signal get increase as the number of users increased However these limitations can be eradicated through use of the MIMO technology Recent demand for information transmission at very high rate in wireless communication has resulted in multiple input/multiple output MIMO systems Chock lingam et al 2014 have observed the production of a considerable increase in capacity by the use of large number of transmit and receipt of antennas that facilitates communication with multiple users Though newlinemassive multiuser MIMO MU MIMO system introduces interference the problem in Multiple Input and Multiple Output MIMO channels is the separation of the data streams which are sent in parallel The process of precoding at the transmitter helps the performance of the decomposition of channel into sub channels to send data streams in parallel independent sub channels MU MIMO is a technology where spatial sharing of channels can be achieved between different users Massive MU MIMO systems can yield a considerable increase in the capacity and BER for the requirement of higher data rate through use of a large number of antennas at the transmitter and the newlinereceiver sides In the case of multi user MIMO a multi antenna and a transmitter communicate simultaneously with multiple receivers MU MIMO system suffers from a huge inter user interference Hence the performance of Massive MU MIMO system under MUI needs analysis and techniques to reduce its effects Such techniques involve newlineprecoding and channel decomposition methods In the precoding technique the newlinetransmit diversity is exploited by weighting the information stream to enable reduction in the corrupted effect in the communication channel newline newline