Reduction of Peak-to-Average Power Ratio in Orthogonal Frequency Division Multiplexing System Using Haar Wavelet Approach
In Orthogonal Frequency Division Multiplexing (OFDM) based systems, with the increasing demand for data rate and reliability in Wireless communications and devices, several issues become very important like bandwidth efficiency, quality of service and radio coverage. However, OFDM is
very sensitive to nonlinear effects due to the high peak-to-average power ratio (PAPR) owned by the transmitted signals and does not show robustness to spectral null channels. This paper proposes a novel BPSK OFDM system based on Haar wavelet transformation. The PAPR reduced by 10 log10
2 ≈ 3 dB at most, compared with the conventional OFDM system and shows robustness to spectral null channels, improving BER performance 3 dB at most. Finally, theoretical and simulated results of the Cumulative Distribution Functions (CDFs) of both Conventional and Proposed OFDM are compared
to show that the Proposed OFDM has better performance than the Conventional OFDM.
Keywords: CDFS; OFDM; PAPR; WAVELET TRANSFORM
Document Type: Research Article
Publication date: 01 February 2019
- Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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