Hybrid FrFT and FFT based Multimode Transmission OFDM System Based | ||||
| The International Conference on Electrical Engineering | ||||
| Article 54, Volume 8, 8th International Conference on Electrical Engineering ICEENG 2012, May 2012, Page 1-12 PDF (991.85 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/iceeng.2012.30800 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Ahmed A A Solyman1; Sherif Elgamel2; Stephan Weiss1; John J Soraghan1 | ||||
| 1Electronic Warfare Department, Military Technical College, Cairo, Egypt. | ||||
| 2CeSIP, University of Strathclyde, Glasgow, UK. | ||||
| Abstract | ||||
| The popularity of multicarrier systems such as orthogonal frequency division multiplexing (OFDM) is based on the ability to cancel inter-symbol-interference (ISI) and channel distortion using a single tap equalizer in the case of a stationary channel. In doubly selective fading channels OFDM transceivers are unable to diagonalize the channel matrix and consequently inter carrier interference (ICI) appears. The discrete fractional Fourier transform (FrFT) has been suggested to enhance performance over traditional OFDM systems when transmitting over doubly-dispersive channels. In this paper a novel hybrid multicarrier system based on the Fractional Fourier transform and Fourier transform is presented. Taking advantage of these properties, we propose an adaptive transmission in those channels using multimode transmission of FrFT-OFDM and FT-OFDM, and evaluate its performances through computer simulations. | ||||
| Keywords | ||||
| Discrete Fourier transform; discrete fractional Fourier transform; Mobile Digital video; Digital Video Broadcasting; Orthogonal frequency-division multiplexing; Time-varying frequency-selective channels | ||||
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