Li Wei, Jin Xin, Dang Qian, et al. Study on multi-symbol differential detection techniques for high-rate coherent optical communications[J]. 2015,(3):12-15.
Li Wei, Jin Xin, Dang Qian, et al. Study on multi-symbol differential detection techniques for high-rate coherent optical communications[J]. 2015,(3):12-15. DOI: 10.13756/j.gtxyj.2015.03.004.
For the compensation of the laser phase noise and frequency offset estimation in high-rate coherent optical communication systems
a Multi-Symbol Differential Detection(MSDD)-based phase recovery algorithm is designed and the system performances and MSDD compensation capabilities under the influence of ASE noise
laser linewidth and frequency offset are studied.Simulation results show that this algorithm produces significant compensation effects on the laser linewidth and frequency offset.Specifically
for a 20 GBaud QPSK modulated system with 1MHz linewidth and 100 MHz frequency offset
the OSNR penalty is only 0.6dB when its BER is 10-3.