Chengcheng Li, Dongwei Pan, Yiqiao Feng, Jiachuan Lin, Lixia Xi, Xianfeng Tang, Wenbo Zhang, Xiaoguang Zhang. Carrier phase estimation scheme for faster-than-Nyquist optical coherent communication systems[J]. Chinese Optics Letters, 2016, 14(10): 100601
- Chinese Optics Letters
- Vol. 14, Issue 10, 100601 (2016)
Fig. 1. PN tracking performances of VVPE in the case of τ = 0.75
Fig. 2. Logic diagram of the modified-VVPE algorithm.
Fig. 3. Architecture of the PDM–QPSK FTN transmission system.
Fig. 4. Linewidth symbol duration product versus CSR with different block lengths: (a) VVPE scheme, (b) modified-VVPE scheme.
Fig. 5. PN tracking performances of the VVPE and the modified-VVPE.
Fig. 6. CSR of the VVPE and modified-VVPE algorithm.
Fig. 7. BER versus OSNR performance at different linewidths: (a) amall linewidth and (b) large linewidth.
Fig. 8. OSNR penalty vs. different values of Δ f · T s BER = 1.0 × 10 − 2
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Table 1. Linewidth Tolerance of Various Length N for VVPE and Modified-VVPE in a PDM–QPSK FTN System
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