Abstract
Orthogonal frequency division multiplexing (OFDM) now a days is becoming the most popular modulation technique for wireless communication networks. OFDM can provide large data rates and it is very robust in the face of radio channel impairments. The capacity, speed and quality of a network can be increased by using Digital modulation techniques. In this paper, we concentrate on digital modulation schemes, such as PSK (Phase Shift keying) and QAM (Quadrature Amplitude Modulation) over an additive white Gaussian Noise (AWGN) channel to analyze the performance behaviour of an OFDM system in terms of bit error rate (BER). The performance of the system is evaluated by simulating in MATLAB and the results makes it clear that, for high-capacity data rate transmission, the QAM modulation is better than the PSK modulation. The performance of the OFDM parameters is compared in LTE's indoor and outdoor environment.
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