PAPR Reduction of Space-Time Coded OFDM Systems Using DFT Spreading Technique
نویسنده
چکیده
ABSTARCTDFT spreading is one of the techniques introduced for peak to average power ratio (PAPR) reduction of OFDM systems. In this technique, the input signal with DFT is spreaded such that the PAPR is minimized but this can reduce the PAPR of OFDM signal to the level of single carrier transmission. In this paper, a DFT spreading method is proposed for the PAPR reduction of OFDM systems with spatial diversity of space time coding. The proposed method is such that PAPR is reduced simultaneously at all antennas, while the spatial encoding relationship still holds. Simulation results show that its performance is very close to the performance of single carrier-FDMA (SC-FDMA).
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