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Multi-level modulation on orthogonal frequency division multiplexing (OFDM) signals is experimentally demonstrated by an integrated silicon Mach-Zehnder modulator. The measured bit error rate is well below the forward error correction (FEC) threshold.
This paper comprehensively investigates the performance of the Turbo-coded free-space optical (FSO) system using subcarrier phase shift keying (SC-PSK) signaling. We obtain theoretical bounds for the system's bit-error rate (BER) and channel capacity over the gamma-gamma strong turbulence channels in both uncoded and Turbo-coded cases. We quantitatively show that the BER and channel capacity are considerably...
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