Multi-user shared access (MUSA) is an autonomous grant- free and high overloading non-orthogonal transmission technology. However, the performance degrades when combining MUSA with discrete Fourier transform spreading OFDM (DFT-s-OFDM) directly. To solve this problem, the real Fourier-related transform spreading methods are researched which are able to reduce the peak-to-average power ratio (PAPR) and increase the stability against channel fading. Furthermore, it enables the receiver to blindly estimate time offset (TO) and frequency offset (FO). The simulation results show that the proposed system performs very well in a frequency selective channel model containing multipath, TO and FO.
A Real Fourier-Related Transform Spreading OFDM Multi-User Shared Access System
2019-09-01
664377 byte
Conference paper
Electronic Resource
English
Secure OFDM-PON System Based on Chaos and Fractional Fourier Transform Techniques
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