BER Performance of Multi User Scheduling for MIMO-OFDM and MIMO-SCFDMA Broadcast Network with Imperfect CSI

Abstract

Multiple Input Multiple Output (MIMO) provides robustness against multipath fading using spatial diversity and increases data rate by spatial multiplexing. These gains are achieved by using multiple antennas. This paper presents multi user (MU) MIMO downlink system under imperfect channel state information (CSI) and heterogeneous user signal-to-noise ratio (SNR) prole. MU MIMO essentially provides MU diversity gain. System capacity is increased by choosing the users experiencing better channel parameters. We have used normalized SNR based scheduler to select a user for data transmission. The outcomes of these techniques are higher data rate and transmitting long range without need of much power or bandwidth. In this paper, a comparative BER performance evaluation of MU MIMO-OFDM and MU MIMO-SCFDMA has been presented and along. Moreover the effects of various factors such as imperfection of channel state information (CSI), heterogeneity of network are investigated for these schemes.