In this paper, we propose an effective possibility density functions method of channel estimation with Viterbi algorithm
based on transitions. We also investigate the performance of the electronic dispersion compensation schemes via this
new channel estimation method. The schemes Simulation results show that it exhibits the similar performance with the
sophisticated MLSE scheme.
This paper discusses electronics dispersion compensation (EDC) by decision feedback equalizer (DFE) in high speed
optical communication system using the LMS and the RLS algorithms, respectively. The theory of the decomposed DFE
derived from basic concept of DFE in EDC is studied. Compared with the traditional DFE, the system complexity of new
one has been reduced while it still keeps the high performance of DFE. Simulation results prove the validity of
practicability and indicate that the decomposed DFE using RLS algorithm can more effectively eliminate intersymbol
interference (ISI) after being transmitted long distance.