The first quadrature phase shift keying (QPSK) data link at 385 GHz, using a photonic‐based terahertz (THz) emission and a double heterodyne THz detection, is reported. The QPSK signalling is investigated up to 16 Gbaud (32 Gbit/s) on a short range distance, with 20 µW received power levels.
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Ducournau et al. (2015) studied this question.
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