4. THz transmission links
4.1 Modulation and performance indicators for a THz communication link
In the THz range, various approaches have been followed, coming from microwave domains, long-distance optical communications, coherent optical communications, and even more conventional radio domains. As a result, digital amplitude modulations and phase/amplitude vector modulations (QPSK, QAM-16, QAM-32 and beyond) are used.
Remember that the main advantage of vector modulation is to optimize bandwidth with the highest possible spectral efficiency (bit/s/Hz).
The spectral efficiency of a modulation, defined by the ratio of bit rate to bandwidth used, in bit/s/Hz, is the parameter to be optimized in order to maximize the amount...
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THz transmission links
Standardization for 100 Gbit/s at THz
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