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Robust SCMA Codebook Design: A Hardware-Aware Autoencoder...
[Submitted on 21 Jun 2026] · 2026-06-23 · via cs updates on arXiv.org

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Abstract:Sparse code multiple access (SCMA) is a promising code-domain non-orthogonal multiple access scheme which is transmitted over orthogonal frequency division multiplexing (OFDM) to exploit multicarrier diversity. In practice, however, carrier frequency offset (CFO) and phase noise (PN) may disrupt the subcarrier orthogonality in OFDM-SCMA systems. Addressing this research problem from a new SCMA codebook design angle, we propose a hardware-aware end-to-end autoencoder that embeds differentiable CFO and Wiener PN layers into the training loop. Simulations show that the proposed codebook effectively suppresses the bit error floors caused by CFO and PN without requiring real-time phase tracking.

Submission history

From: Zilong Liu [view email]
[v1] Sun, 21 Jun 2026 17:22:41 UTC (283 KB)

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