Invention Publication
EP3086502A1 METHOD FOR OPTIMIZING CLOCK RECOVERY PERFORMANCES AT A COHERENT OPTICAL RECEIVER OF AN OPTICAL WDM TRANSMISSION SYSTEM, RECEIVER ASSOCIATED
审中-公开
法在合理卒中恢复服务于光WDM传输系统的相干光接收器，使Receiver
- Patent Title: METHOD FOR OPTIMIZING CLOCK RECOVERY PERFORMANCES AT A COHERENT OPTICAL RECEIVER OF AN OPTICAL WDM TRANSMISSION SYSTEM, RECEIVER ASSOCIATED
- Patent Title (中): 法在合理卒中恢复服务于光WDM传输系统的相干光接收器，使Receiver
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Application No.: EP15164397.0Application Date: 2015-04-21
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Publication No.: EP3086502A1Publication Date: 2016-10-26
- Inventor: Dorize, Christian , Renaudier, Jeremie
- Applicant: ALCATEL LUCENT
- Applicant Address: 148/152 route de la Reine 92100 Boulogne-Billancourt FR
- Assignee: ALCATEL LUCENT
- Current Assignee: ALCATEL LUCENT
- Current Assignee Address: 148/152 route de la Reine 92100 Boulogne-Billancourt FR
- Agency: Cabinet Camus Lebkiri
- Main IPC: H04L7/00
- IPC: H04L7/00 ; H04L7/027 ; H04B10/61 ; H04J14/02 ; H04J14/06 ; H04B10/077
Abstract:
The invention relates to a method (Mth) for optimizing clock recovery performances at a coherent optical receiver (Rx) of an optical Wavelength Division Multiplexed transmission system, said method (Mth) comprising the following steps:
- Sampling (Smp_Xp°Yp°), at a samples per symbol rate (xSPS), a pair of complex polarization signals (Xp°, Yp°) of a Polarization Division Multiplexed optical signal (Sg) received from a coherent optical transmitter at a symbol rate (SB), so as to obtain a pair of digital complex polarization signals (Xp, Yp)
- Recovering (Rec_OSC) a receiver clock in the pair of digital complex polarization signals (Xp, Yp), using a clock recovery algorithm, at a clock rate equal to the sample per symbol rate (xSPS)
- Calculating (Calc_Pst) a performance estimate (Pst) of said clock receiver recovery
- If said performance estimate (Pst) is below a performance threshold (Thr), then :
• replacing (Prgm_Alg) the clock recovery algorithm with a selected clock recovery algorithm, and
• modifying (Mod_xSPS) the sample per symbol rate (xSPS) in accordance with a range of acceptable samples per symbol rates for the selected clock recovery algorithm
- Reiterating the previous steps until the performance estimate (Pst) reaches the performance threshold (Thr).
- Sampling (Smp_Xp°Yp°), at a samples per symbol rate (xSPS), a pair of complex polarization signals (Xp°, Yp°) of a Polarization Division Multiplexed optical signal (Sg) received from a coherent optical transmitter at a symbol rate (SB), so as to obtain a pair of digital complex polarization signals (Xp, Yp)
- Recovering (Rec_OSC) a receiver clock in the pair of digital complex polarization signals (Xp, Yp), using a clock recovery algorithm, at a clock rate equal to the sample per symbol rate (xSPS)
- Calculating (Calc_Pst) a performance estimate (Pst) of said clock receiver recovery
- If said performance estimate (Pst) is below a performance threshold (Thr), then :
• replacing (Prgm_Alg) the clock recovery algorithm with a selected clock recovery algorithm, and
• modifying (Mod_xSPS) the sample per symbol rate (xSPS) in accordance with a range of acceptable samples per symbol rates for the selected clock recovery algorithm
- Reiterating the previous steps until the performance estimate (Pst) reaches the performance threshold (Thr).
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