TITLE:
Peak-to-Average Power Ratio Performance Analysis for Orthogonal Chirp Division Multiplexing Multicarrier Systems Based on Discrete Fractional Cosine Transform
AUTHORS:
Hani Attar
KEYWORDS:
PAPR, Discrete Fourier Transform, Discrete Fractional Cosine Transform, Mobile Digital Video, Doubly Selective Channels
JOURNAL NAME:
International Journal of Communications, Network and System Sciences,
Vol.9 No.12,
December
22,
2016
ABSTRACT: In doubly selective fading channels, the
orthogonal frequency division multiplexing (OFDM) multicarrier system may fail.
Chirp like basis (fractional Fourier transform-fractional cosine transform) may
be used instead of complex exponential basis in this case to improve the system
performance. However, in multicarrier transmission, the high peak to average
power ratio (PAPR) of the transmitted signal is one of the difficult problems
that face both the chirp and the exponential basis. In this paper, an
evaluation for the PAPR performance of a multicarrier system based on the fractional
cosine transform (FrCT) is introduced and then compared with DFrFT and FFT.
Moreover, applying the SLAM technique over these systems is provided to
understand the behaviour of these systems when applying SLAM. Simulations
verify that this system obtains a better PAPR performance. Moreover, further
PAPR reduction can be gained using the well-known PAPR reduction methods.
Moreover, applying SLAM technique improves the performance of (dB) by 4 dB to 5
dB and all systems become as competitive to each other when SLAM is applied.
Finally, BER performance comparison among OFDM, Discrete Cosine Transform MCM
(DCT- MCM), Discrete Hartley Transform MCM (DHT-MCM), DFrFT-OCDM and DFrCT-
OCDM MCM systems was done by means of simulation over 100,000 multicarrier blocks
for each one and showed that our proposed scenario gave the best performance.