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1	Analysis of the effects of phase noise and frequency offset in orthogonal frequency division multiplexing (OFDM) systems Erdogan, Ahmet Yasin 03 1900 (has links) Approved for public release, distribution is unlimited / Orthogonal frequency division multiplexing (OFDM) is being successfully used in numerous applications. It was chosen for IEEE 802.11a wireless local area network (WLAN) standard, and it is being considered for the fourthgeneration mobile communication systems. Along with its many attractive features, OFDM has some principal drawbacks. Sensitivity to frequency errors is the most dominant of these drawbacks. In this thesis, the frequency offset and phase noise effects on OFDM based communication systems are investigated under a variety of channel conditions covering both indoor and outdoor environments. The simulation performance results of the OFDM system for these channels are presented. / Lieutenant Junior Grade, Turkish Navy Multiplexing Brownian motion processes Electrical engineering Frequency offset Phase noise Differential decoding IFFT (Inverse fast Fourier transform) Guard interval FFT MATLAB Additive white Gaussian noise (AWGN) Interleaver Deinterleaver Mobile channels Convolutional encoding Viterbi decoder Probability of bit error Weiner process