摘要
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.
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.
基金
supported by the National Natural Sci-ence Foundation of China(No.60932004)
the National"973"Program of China(No.2012CB315705)
the National"863"Program of China(No.2012AA011301)
