The symbols, discovered on 40,000-year-old artifacts in caves in southwest Germany, may have been a precursor to the first written language ...
Abstract: We demonstrate a 3.68-THz WDM system using a novel SPC-coded PS-256QAM format with iterative decoding. Spectral efficiencies of 7.31 and 7.5 bits/s/Hz are achieved over 2,232 km and 1,860 km ...
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