Abstract:
At the present era of communication technology, every user wants a
communication system that has higher data transmission capability and reliability.
Orthogonal Frequency Division Multiplexing (OFDM) is a frequency division
multiplexed multi carrier transmission method and each multiplexed signal is
orthogonal to each other. This technology is known as core technology of the new
generation wireless mobile communication systems. This technology has higher
data transmission capability and reliability as well as has the ability to combat
frequency selective fading or narrowband interference while maintaining high
spectrum utilization. Next, Multiple transmit and receive can be used to form multiple
input multiple output (MIMO) channels to increase the capacity and data rate. The
key advantage of employing multiple antennas is to get reliable performance through
diversity and the achievable higher data rate through spatial multiplexing. The first
objective of this paper is to simulate the wireless system model (802.11a/n) with
different type of digital modulators and number of antenna(s). The second objective
is to analyze the MIMO-OFDM system using variant type of digital modulators and
number of antenna(s). This paper is mainly focused on the result of the Bit Error
Rate (BER) to analyze the performance of MIMO OFDM systems. In this paper, we
considered QPSK, 16-PSK, 32-PSK, 64-PSK, 256-PSK, 16-QAM, 32-QAM, 64-QAM
and 256-QAM modulation techniques. All the simulations are performed by using the
MATLAB framework.
