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Reduced Computation Using the DFT Property in the Phase Weighting Method  

Ryu Heung-Gyoon (Dept. of Electronic Engineering and Research Institute of Computer, Information & Communication, Chungbuk National University)
Hieu Nguyen Thanh (Dept. of Electronic Engineering and Research Institute of Computer, Information & Communication, Chungbuk National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.16, no.10, 2005 , pp. 1028-1035 More about this Journal
Abstract
OFDM system has high PAPR(Peak-to-Average-Power Ratio) problem. In this paper, we present a low complexity phase weighting method to reduce the computational quantity so that we can cut down the processing time of SPW method. Proposed method is derived from the DFT property of periodical sequences by which PAPR can be reduced efficiently. The simulation results show the same PAPR reduction efficiency of proposed method in comparison with conventional methods. It can reduce 2.15 dB of PAPR with two phase factors and 3.95 dB of PAPR with four phase factors. The computation analysis shows significant improvement in the low complexity phase weighting method.
Keywords
OFDM; PTS; SPW; PAPR Reduction; DFT;
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