Open AccessA Modified Method Based on the Discrete Sliding Norm Transform to Reduce the PAPR in OFDM Systems
Author(s) -
Salmanzadeh R.,
Tazehkand B. Mozaffari
Publication year - 2014
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.14.0113.0053
Subject(s) - orthogonal frequency division multiplexing , fading , nonlinear distortion , algorithm , transmitter , spectral efficiency , computer science , wideband , robustness (evolution) , narrowband , mathematics , electronic engineering , amplifier , channel (broadcasting) , bandwidth (computing) , telecommunications , engineering , biochemistry , chemistry , gene
Orthogonal frequency division multiplexing (OFDM) is a modulation technique that allows the transmission of high data rates over wideband radio channels subject to frequency selective fading by dividing the data into several narrowband and flat fading channels. OFDM has high spectral efficiency and channel robustness. However, a major drawback of OFDM is that the peak‐to‐average power ratio (PAPR) of the transmitted signals is high, which causes nonlinear distortion in the received data and reduces the efficiency of the high power amplifier in the transmitter. The most straightforward method to solve this problem is to use a nonlinear mapping algorithm to transform the signal into a new signal that has a smaller PAPR. One of the latest nonlinear methods proposed to reduce the PAPR is the L 2 ‐by‐3 algorithm, which is based on the discrete sliding norm transform. In this paper, a new algorithm based on the L 2 ‐by‐3 method is proposed. The proposed method is very simple and has a low complexity analysis. Simulation results show that the proposed method performs better, has better power spectral density, and is less sensitive to the modulation type and number of subcarriers than L 2 ‐by‐3.