Timing Synchronization Algorithm for Coherent Optical Orthogonal Frequency Division Multiplexing System Based on Pseudo Noise Sequence

Xueqi Wu; Jianfei Liu; Xiangye Zeng; Jia Lu; Yanpeng Xu

doi:10.3788/AOS201939.0506001

Acta Optica Sinica, Volume. 39, Issue 5, 0506001(2019)

Timing Synchronization Algorithm for Coherent Optical Orthogonal Frequency Division Multiplexing System Based on Pseudo Noise Sequence

Xueqi Wu^1,2, Jianfei Liu^1,2、*, Xiangye Zeng^1,2, Jia Lu^1,2, and Yanpeng Xu^1,2

Author Affiliations

¹ School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, China

² Tianjin Key Laboratory of Electronic Materials and Equipment, Tianjin 300401, China

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Figures & Tables(8)

Fig. 1. Three cases of timing synchronization

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Fig. 2. Training sequence structure of improved algorithm

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Fig. 3. Sliding correlation operation and symmetric correlation operation of improved algorithm

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Fig. 4. Structural diagram of CO-OFDM system

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Fig. 5. Timing metric estimation results of improved algorithm. (a) CP is N/8; (b) CP is N/4

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Fig. 6. Timing metric estimation results of improved algorithm at low SNR. (a) CP is N/8 and SNR is 1 dB; (b) CP is N/4 and SNR is 5 dB

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Fig. 7. Timing metric estimation results of four algorithms at low SNR. (a) CP is N/8 and SNR is 5 dB; (b) CP is N/4 and SNR is 5 dB

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Table 1. Complexity analysis
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Table 1. Complexity analysis
Algorithm P(d) R(d) M(d)
* ´ + ^2 + ^2 ÷ ´
Schmidl N/2 N/2 N/2-1 N/2 N/2-1 2 1 0
Minn N/2 N/2 N/2-2 N/2 N/2-2 2 1 0
Park 0 N/2 N/2-1 N/2 N/2-1 2 1 0
Proposed N/2 N/2 N/2-2 N/2 N/2-2 4 2 1

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Xueqi Wu, Jianfei Liu, Xiangye Zeng, Jia Lu, Yanpeng Xu. Timing Synchronization Algorithm for Coherent Optical Orthogonal Frequency Division Multiplexing System Based on Pseudo Noise Sequence[J]. Acta Optica Sinica, 2019, 39(5): 0506001

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