Abstract
In this paper, a Golay complementary training sequence (TS)-based symbol synchronization scheme is proposed and experimentally demonstrated in multiband orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband over fiber (UWBoF) system with a variable rate low-density parity-check (LDPC) code. Meanwhile, the coding gain and spectral efficiency in the variable rate LDPC-coded MB-OFDM UWBoF system are investigated. By utilizing the non-periodic auto-correlation property of the Golay complementary pair, the start point of LDPC-coded MB-OFDM UWB signal can be estimated accurately. After 100km standard single-mode fiber (SSMF) transmission, at the bit error rate of 1×10−3, the experimental results show that the short block length 64QAM-LDPC coding provides a coding gain of 4.5dB, 3.8dB and 2.9dB for a code rate of 62.5%, 75% and 87.5%, respectively.
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