ANALYZING BIT ERROR RATE (BER) USING VARIATIONS OF MODULATION TECHNIQUES FOR WIRELESS COMMUNICATION

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.