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River Publishers Series in Communications Series

Discrete Fractional Fourier Transform Based OFDM System for Future Wireless Mobile Communication

Hardback
August 2021
9788770221801
More details
  • Publisher
    River Publishers
  • ISBN 9788770221801
  • Language English
  • Pages 250 pp.
  • Size 6" x 9"
$115.00
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August 2021
9788770221795
More details
  • Publisher
    River Publishers
  • ISBN 9788770221795
  • Language English
  • Pages 250 pp.
  • Size 6" x 9"
$115.00

Orthogonal frequency division multiplexing (OFDM) is an attractive physical layer waveform candidate for wireless broadband communication. Apart from being spectrally efficient with overlapping subcarriers, the OFDM system enables simplified equalization at the receiver and effectively combats the inter-block interference with cyclic prefix. For achieving low peak-to-average power ratio (PAPR) in the uplink, single carrier frequency domain multiple access (SC-FDMA) is used for fourth-generation (4G), long term evolution (LTE). SC-FDMA achieves low PAPR compared to OFDMA using discrete Fourier transform (DFT) precoding. This book introduces both OFDM and SC-FDMA, similarities, and differences between their transmitter and receiver operations, time-frequency representations, and low complexity joint equalization and CFO compensation (JECC), etc. Advanced waveform candidates such as Filtered OFDM, FBMC, GFDM, etc. are also introduced. To improve the throughput of existing mobile communication, non-orthogonal multiple access (NOMA) system configurations based on OFDM are also covered.

Essentially, the performance of both the OFDMA and SC-FDMA is very sensitive to the presence of carrier frequency offset (CFO) arising from synchronization errors, Doppler, and manufacturing defects. This is because the multicarrier structure and the channel decomposition at the receiver based on DFT lose its optimal performance in the presence of CFO. This book discusses an elegant time-frequency signal processing tool for this purpose called fractional Fourier transform (FRFT). A discrete version of FRFT (or DFRFT) employing a chirp basis in place of the complex exponential basis of DFT can easily replace the existing multicarrier modulation/demodulation and channel decomposition. A detailed performance evaluation of the DFRFT based OFDM system that can significantly outperform the conventional DFT based OFDM system is also given. The study presented involves a detailed interference analysis of the DFRFT based OFDM system in the presence of CFO. This inter carrier interference (ICI) analysis is then used to devise Low complexity JECC for DFRFT based OFDM. Through the study and result presented in this book, the use of the DFRFT based OFDM system is motivated for wireless mobile communication especially in the presence of CFO.

Preface
Authors
Introduction
Future Wireless Communication
Waveform and Multiple Access
OFDM based system with CFO
DFRFT based OFDM system
Analysis of DFRFT based OFDM system and Implementation Challenges
Joint Equalization and CFO compensation (JECC) for DFRFT based single carrier and multicarrier transceivers

Vinay K. Trivedi

Vinay K. Trivedi is at Indian Institute of Technology Patna, India.

Preetam Kumar

Preetam Kumar is at Indian Institute of Technology Patna, India.

Ramjee Prasad, PhD

Ramjee Prasad is with CTIF Global Capsule, Department of Business Development and Technology, also Aarhus University, Herning Denmark. Dr. Ramjee Prasad, Fellow IEEE, IET, IETE, and WWRF, is a Professor of Future Technologies for Business Ecosystem Innovation (FT4BI) in the Department of Business Development and Technology, Aarhus University, Herning, Denmark. He has published more than 50 books, 1000 plus journal and conference publications, more than 15 patents, over 140 Ph.D. Graduates and a larger number of Masters (over 250). Several of his students are today worldwide telecommunication leaders themselves.

wireless broadband communication; orthogonal frequency division multiplexing (OFDM); inter-block interference; cyclic prefix; peak-to-average power ration (PAPR); single carrier frequency domain multiple access (SC-FDMA); 4G; carrier frequency offset (CFO); fractional Fourier transform (FRFT); waveform; inter-carrier interference (ICI), discrete fractional Fourier transform (DFRFT); discrete cosine transform (DCT), Interference Compensation