Abstract
The direct-detected optical OFDM (DDO-OFDM) system in frequency-selective fading fiber channel with three different types of pilot interval design has been experimentally investigated. In these schemes, the 2.28 Gbit/s QPSK-OFDM signal is transmitted over 100km fiber in the system. The experiment results show the scheme with sparse pilot as frequency increasing shows the best performance for DDO-OFDM system.
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