DSSS Chip-Wise Faster-than-Nyquist Signaling with DPSK for Robust Carrier Synchronization - Archive ouverte HAL Access content directly
Conference Papers Year : 2023

DSSS Chip-Wise Faster-than-Nyquist Signaling with DPSK for Robust Carrier Synchronization

Abstract

Direct sequence spread spectrum (DSSS) signals possess strong and undesirable cyclostationary features when used in covert communications. This paper addresses their mitigation via chip-wise faster-than-Nyquist (FTN) signaling and time-varying pseudo-random SNR-optimal spreading sequences. We append a differential phase-shift keying (DPSK) encoder to the DSSS/FTN system to use a non-coherent differential receiver that facilitates carrier synchronization in challenging scenarios involving phase, frequency, and frequency-rate offsets. The proposed DSSS/FTN system proves robust with a bit-error-probability performance close to its traditional DSSS/Nyquist counterpart. Our results pave the way for designing low probability of detection/intercept waveforms without incurring a noticeable extra complexity at the receiver side.
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Dates and versions

hal-04367084 , version 1 (29-12-2023)

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Cite

Damien Roque, Stéphanie Bidon, Charly Poulliat. DSSS Chip-Wise Faster-than-Nyquist Signaling with DPSK for Robust Carrier Synchronization. IEEE Military Communications Conference (MILCOM 2023), IEEE, Oct 2023, Boston, United States. pp.516-521, ⟨10.1109/MILCOM58377.2023.10356340⟩. ⟨hal-04367084⟩
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