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Randomized DFT Spread Spectrally Efficient Frequency Division Multiplexing
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DOI：10.1109/twc.2026.3714695.png)
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Abstract
En 中文
This paper proposes a novel randomized discrete Fourier transform spread spectrally efficient frequency division multiplexing (RDFT-s-SEFDM) system, which employs an expectation propagation (EP)-based detection algorithm to achieve superior detection performance. Randomized discrete Fourier transform (DFT) spreading is introduced to improve the performance of the EP-based algorithm even under significant bandwidth compression. The simulation results demonstrate that the proposed RDFT-s-SEFDM system achieves superior bit error rate (BER) performance compared to conventional SEFDM in additive white Gaussian noise (AWGN). In addition, the proposed system exhibits robustness against multipath frequency-selective fading channels by exploiting spreading and diversity gain, making it suitable for wireless channels with large delay spreads.
Keywords:
Discrete Fourier transform spreading
expectation propagation
orthogonal frequency division multiplexing
spectrally efficient frequency division multiplexing
Journal
IF:
10.7
Papers:
1.3W
Citations:
5.3W