Author(s): Prof. Rajeshwar Lal Dua, Pooja Yadav
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Vol.1 - Issue 7 (September - 2012)
Orthogonal frequency division multiplexing (OFDM) now a day is becoming the chosen modulation technique for wireless communication networks. It is only because it can provide large data rates and is sufficiently robust in the face of radio channel impairments. Digital modulation techniques provide sufficient evolution of our mobile wireless communications by increasing the capacity, speed and quality of a wireless networks. 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 of an OFDM system in terms of bit error rate (BER). This is evaluated through a computer simulation, the results from which make it clear that, for high-capacity data rate transmission, the QAM modulation is better than the PSK modulation.
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