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We propose an orthogonal basis expansion based method for the nonlinearity compensation in CO-OFDM systems. Numerical results prove that the scheme is powerful in improving the system BER performance.
We report on a novel pulse repetition frequency independent scheme for stabilizing a mode-locked fiber laser by tracking phase fluctuations in the cavity. The performance of this scheme has been evaluated using a SIMULINKTM model.
We present the principle and experimental demonstration of Unique-word DFT-Spread OFDM transmission. The results show that the 1-Tb/s UW-DFTS-4QAM-OFDM signal can be transmitted over 8,000-km SSMF, with 0.6-dB Q-factor improvement compare with the conventional OFDM.
Novel Feed-forward laser (or carrier) phase noise compensation and frequency control for M-ary quadrature amplitude modulation (M-QAM) transmitter are proposed and demonstrated by simulation.
We investigate the performance of LDPC codes with BDPSK-OFDM modulation over the AWGN channel with unknown carrier phase. The proposed A-TSOI-LLR metric is performing better and more tolerant to SNR estimation error than the Gaussian metric.
We numerically investigated the possibility of a phase sensitive amplifier based on a semiconductor optical amplifier. Suppression of phase variation was confirmed in the dual-pump degenerate four wave mixing method.
Our proposed phase-noise cancelled OFDR is improved to identify multi-reflection points. Multi-reflection points are identified by applying spreading code modulation to the signal. It shows that the spatial resolution is determined by the modulation rate.
We demonstrated a simple optoelectronic oscillators using dual-modulation of two-section distributed feedback semiconductor lasers. By applying multimode operation in the two-section lasers, an 8-GHz OEO signal with phase noise of −108 dBc/Hz at 5-kHz offset is generated.
A cycle-slip resilient pilot-aided carrier phase estimation that achieves 4000km transmission is proposed for 16-QAM systems. We demonstrate that fast phase transition induced by ASE and nonlinear distortions are the main reasons of cycle-slips.
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