ANALISIS UNJUK KERJA MODULASI M-Ary QAM PADA SISTEM ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM)

NAFIA, RIZKA (2019) ANALISIS UNJUK KERJA MODULASI M-Ary QAM PADA SISTEM ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM). Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

In this final project a bit error rate (BER) simulation was introduced using M-QAM (Quadrature Amplitude Modulation) based on software using MATLAB R2016a software. This study aims to simulate a basic OFDM system by testing the performance of M-QAM modulation against interference that can occur during transmission with the Additive White Gaussian Noise (AWGN) channel model. Bit error rates are used to assess systems that can send digital data from one address to another.Bit error rates are used to assess a systems that can send digital data from one address to another. Orthogonal Frequency Division Multiplexing (OFDM) is a transmission technique that uses several orthogonal (multicarrier) frequency pieces. Each of these subcarriers is modulated with conventional modulation techniques at a low symbol ratio. At this time OFDM was chosen as a modulation technique for wireless communication. This is because OFDM systems can provide large data speeds with optimal bit error rates and are quite resistant to transmission line interference. Based on the simulation and the results of the analysis, it was found that the use of different modulation schemes affected the bit error rate. And the use of the OFDM system makes the BER system better.

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