REDUCTION OF BIT ERROR RATE USING VARIATIONS OF GUARD INTERVALS AND ANTENNAS FOR WIRELESS COMMUNICATIONS

Abstract

In the current era of communication technology, each user seeks a communication system with a better capacity for data transfer and greater dependability. Each multiplexed signal in orthogonal frequency division multiplexing (OFDM), a multi-carrier frequency division multiplexing technique, is orthogonal to the others. The new generation of wireless mobile communication systems are said to be built around this technology. This technique can transmit data more reliably and efficiently and can also prevent frequency selective fading or narrowband interference while retaining excellent spectral efficiency. The capacity and data rate can then be increased by creating multiple input multiple output (MIMO) channels using multiple transmit and receive. The main benefit of using numerous antennas is the ability to achieve larger data rates through spatial multiplexing and stable performance through diversity. This paper's first goal is to replicate the wireless system model (802.11a/n) using various types of GI values and antenna counts (s). The second goal is to examine the MIMOOFDM system utilizing various GI values and antenna counts (s). The performance of MIMO OFDM systems is analyzed in this research primarily using the Bit Error Rate (BER) results. In this study, we considered the value of GI together with the values of 1/2, 1/4, and 1/8 of subcarriers. The MATLAB framework is used to carry out every simulation.