This paper focuses on the polarization division multiplexing (PDM)-coherent optical orthogonal frequency division multiplexing (OFDM) quadrature phase shift keying (QPSK)-based system. It has been confirmed in literature that in term of overall system's computational complexity, frequency domain based channel estimation method exhibits lower computational complexity in comparison with its counterpart, the time-domain channel estimation scheme. Hence, this article specifically presents three frequency domain-based channel estimation schemes for PDM-coherent Optical OFDM-QPSK system, namely the frequency domain-minimum mean square error estimator (FD-MMSEE), frequency domain-maximum likelihood estimator (FD-MLE), and the FD-piecewise linear interpolation (FD-PLI)-based channel estimator. The results of the computer simulation carried out show that FD-MLE outperforms its two counterparts, the FD-MMSEE and FD-PLI-based channel estimators, both in terms of bit error rate (BER) and mean square error (MSE) performances.
Frequency Domain Channel Estimation Schemes for PDM-Coherent Optical OFDM-QPSK-Based Communication Systems
01.06.2018
311707 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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