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A degree distribution mapping method of parity check matrix in irregular QC-LDPC based FSO communication is proposed. Before channel coding, use the mapping method to select the appropriate distribution of the parity check matrix corresponding to atmospheric channel estimation feedback. BER performance of the optimal distribution of the parity check matrix in different turbulence intensity has been...
A novel multi-amplitude minimum shift keying (MAMSK) orthogonal frequency division multiplexing (OFDM) signal is proposed for 60-GHz radio-over-fiber (RoF) access system. It can increase the tolerance toward frequency offset of an OFDM signal due to the faster roll-off side-lobe. In the experiment, a 3.21-Gb/s 2AMSK-OFDM signal is transmitted over 22 km single mode fiber (SMF) and 5 m air link successfully...
We experimentally demonstrate a dynamic λ-OFDMA with selective DPSK overlaid, and multicast control is realized through an alternative LO. The 10-Gb/s P2P signal, 2.5-Gb/s overlaid and 1.25-Gb/s upstream signal are transmitted 25km fiber successfully.
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