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Author

Sandesh Rao Mattu

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Preprint Sep 2026

Modulation Augmentation and Constellation Shaping for LDPC-Coded QPSK

While constellation shaping improves spectral efficiency, its application to quadrature phase-shift keying (QPSK) remains limited. We address this limitation by incorporating a short shaping code into low-density parity-check (LDPC)-coded QPSK systems. Specifically, a subset of LDPC codeword bits is used as shaping bit...

He-Ping Wan, Joonyoung Cho, Sandesh Rao Mattu et al. · 0 citations

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