OFDM is recognized to be the one of the best solution for wideband wireless communication systems, but it exhibits as drawbacks a large amplitude fluctuation and a high sensitivity to phase noise. Here we consider the effect of phase noise spectrum, which diverges form the classical Wiener model in most of the commercial oscillators. In this analysis we show two terms of the phase noise distortion, one dependent on the symbols of adjacent subcarriers and the other on the symbol under detection, so that the performance degradation is a function of both the phase noise spectrum and the constellation of each subcarrier. The relation between the penalty and the phase noise spectrum is derived, showing the dependence on the main OFDM parameters.
Phase Noise Limits in OFDM Systems
CORVAJA, ROBERTO;PUPOLIN, SILVANO
2003
Abstract
OFDM is recognized to be the one of the best solution for wideband wireless communication systems, but it exhibits as drawbacks a large amplitude fluctuation and a high sensitivity to phase noise. Here we consider the effect of phase noise spectrum, which diverges form the classical Wiener model in most of the commercial oscillators. In this analysis we show two terms of the phase noise distortion, one dependent on the symbols of adjacent subcarriers and the other on the symbol under detection, so that the performance degradation is a function of both the phase noise spectrum and the constellation of each subcarrier. The relation between the penalty and the phase noise spectrum is derived, showing the dependence on the main OFDM parameters.Pubblicazioni consigliate
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