Peak-to-average power ratio reduction of transmission signal of all-optical orthogonal time/frequency domain multiplexing using fractional Fourier transform

2017 ◽  
Vol 402 ◽  
pp. 123-127 ◽  
Author(s):  
T. Nagashima ◽  
G. Cincotti ◽  
T. Murakawa ◽  
S. Shimizu ◽  
M. Hasegawa ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Frequency Domain ◽  
Fractional Fourier Transform ◽  
Average Power ◽  
Power Ratio ◽  
Time Frequency ◽  
Frequency Domain Multiplexing ◽  
All Optical ◽  
Power Ratio Reduction ◽  
Ratio Reduction

scholarly journals Generalized Discrete Fourier Transform for FBMC Peak to Average Power Ratio Reduction

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 81730-81740 ◽  
Author(s):  
Mohamed A. Aboul-Dahab ◽  
Mohamed M. Fouad ◽  
Radwa A. Roshdy
Keyword(s):  
Fourier Transform ◽  
Discrete Fourier Transform ◽  
Average Power ◽  
Power Ratio ◽  
Power Ratio Reduction ◽  
Ratio Reduction

scholarly journals Peak to Average Power Ratio Reduction in NC–OFDM Systems

2015 ◽  
Vol 66 (3) ◽  
pp. 154-158 ◽  
Author(s):  
Saadia Tabassum ◽  
Sajjad Hussain ◽  
Abdul Ghafoor
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Fractional Fourier Transform ◽  
Average Power ◽  
Modulation Scheme ◽  
Power Ratio ◽  
Ofdm Systems ◽  
Radio Communications ◽  
Trigonometric Transforms ◽  
Power Ratio Reduction ◽  
Ratio Reduction

Abstract Non contiguous orthogonal frequency division multiplexing (NC-OFDM) is an efficient and adaptable multicarrier modulation scheme to be used in cognitive radio communications. However like OFDM, NC-OFDM also suffers from the main drawback of high peak to average power ratio (PAPR). In this paper PAPR has been reduced by employing three different trigonometric transforms. Discrete cosine transform (DCT), discrete sine transform (DST) and fractional fourier transform (FRFT) has been combined with conventional selected level mapping (SLM) technique to reduce the PAPR of both OFDM and NC-OFDM based systems. The method combines all the transforms with SLM in different ways. Transforms DCT, DST and FRFT have been applied before the SLM block or inside the SLM block before IFFT. Simulation results show the comparative analysis of all the transforms using SLM in case of both OFDM and NC-OFDM based systems.

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