Chinese Optics Letters, 2012, 10 (11): 110601, Published Online: Aug. 3, 2012
Improving nonlinearity tolerance of 112-Gb/s PDM OFDM systems with coherent detection using BLAST algorithm 
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060.1660 Coherent communications 060.4370 Nonlinear optics, fibers 070.6020 Continuous optical signal processing
Abstract
The use of Bell Laboratories layered space-time (BLAST) architecture as a digital signal processing algorithm is proposed in this letter. It is aimed at improving the nonlinearity tolerance of a polarization division multiplexing (PDM) coherent optical orthogonal frequency division multiplexing (CO-OFDM) system. The application of this channel estimation algorithm simulates system performance under different dispersion compensation (DC) maps. Simulation results show that, compared with intra-symbol frequency-domain averaging (ISFA) algorithm, at least 5-dB Q-factor improvement is achieved for the PDM CO-OFDM system at 112-Gb/s data rate over an 800-km standard single-mode fiber (SSMF) without DC.
Yanfei Xu, Yaojun Qiao, Yuefeng Ji. Improving nonlinearity tolerance of 112-Gb/s PDM OFDM systems with coherent detection using BLAST algorithm[J]. Chinese Optics Letters, 2012, 10(11): 110601.
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