Performance Evaluation of ML-VBLAST MIMO System using various antenna configurations with Ricean and Rayleigh Channel

Abstract

Wireless communication technology has shown that the application of multiple antennas at both transmitter and receiver sides improve the possibility of high data rates through multiplexing or to improve performance through diversity compared to single antenna systems. In this article, we studied the BER performance of Maximum Likelihood (ML)- Vertical Bells Lab Layered Space Time Architecture (V-BLAST) Spatial Multiplexing Technique with using different modulation techniques such as BPSK and QPSK, in independent, identically distributed (i.i.d) flat fading channel like Rayleigh and Ricean Channel. In this article we will compared a different multiple antenna configuration with BPSK and QPSK modulation techniques in different channel and finally we will concluded that ML-VBLAST decoding technique using BPSK modulation scheme gives better result than QPSK modulation technique in both the channels. In this we got more optimal result for 1× 4 antennas for V-BLAST system in rician fading channel and for Rayleigh channel 4 X 4 antennas for ML-V-BLAST system. Finally we compare the Rayleigh and Ricean Channel for 2 X 2 antenna configurations and in this we found Ricean Channel have better results than Rayleigh Channel in ML-VBLAST MIMO System.

Keywords: Binary Phase Shift Key (BPSK), Bit Error Rate (BER), Multiple input multiple output (MIMO), Maximum Likelihood (ML), Vertical Bell Laboratories Layered Space-Time (V-BLAST)