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An SLM-Based Real-time PAPR Reduction method using Dummy Sequence Insertion in the OFDM Communication System  

Ryu Heung-Gyoon (충북대학교 전기전자컴퓨터 공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.4A, 2005 , pp. 288-295 More about this Journal
Abstract
OFDM communications system is very attractive for the high data rate wireless transmission. However, it may be distorted in the nonlinear HPA since OFDM signal has high PAPR. So, a new SLM method using dummy sequence is studied for reducing the PAPR, and we call it DSI-SLM method. Unlike the conventional SLM method using the phase rotation, dummy sequences for PAPR reduction are assigned at the predefined sub-carriers. After IFFT, the OFDM data signal of the lowest PAPR is selected to transmit. So, it can cut down the computational complexity because it does not require the transmission and demodulation process of side information about the phase rotation. This proposed method can solve the time delay problem so that PAPR reduction can be made in real time processing.
Keywords
PAPR; OFDM; dummy sequence; SLM and real time processing;
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