Timing Recovery Algorithm Selection for Duo-Binary Signal Used in Next Generation 25G-EPON

Low complexity and effective symbol timing recovery (STR) algorithm is a serious challenge for high speed NG-EPON system with 25 Gb/s serial bit-rate per channel. In this paper, the frequently used nonlinear function based timing algorithms are compared in 25 Gb/s Duo-binary transmission system through simulation and experiment. Both simulation and experiment results show that absolute-law based STR (AL-STR) algorithm has minimum timing jitter and lowest computational complexity for Duo-binary receiver. The jitter of STR caused by the nonideal Duo-binary signal is also investigated by simulating different bandwidths of the commercial 10G optical devices. Results show that there are only little effect on STR performance when the –3 dB bandwidth changes from 6 to 8.75 GHz. Maximum likelihood sequence estimation (MLSE), linear and nonlinear equalizer are, respectively, performed after STR in 10G optics-based 25 Gb/s Duo-binary receiver. An optical power sensitivity of –25.6 dBm can be obtained with AL-STR and MLSE.

[1]  Vincent Houtsma,et al.  Demonstration of symmetrical 25 Gbps TDM-PON with 31.5 dB optical power budget using only 10 Gbps optical components , 2015, 2015 European Conference on Optical Communication (ECOC).

[2]  Xin Yin,et al.  25Gb/s 3-level burst-mode receiver for high serial rate TDM-PONs , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[3]  Vincent Houtsma,et al.  APD-based duobinary direct detection receivers for 40 Gbps TDM-PON , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[4]  Wei Chen,et al.  25-Gb/s and 40-Gb/s Faster-than-Nyquist PON Based on Low-Cost 10G-Class Optics , 2015 .

[5]  Adam Lender,et al.  The duobinary technique for high-speed data transmission , 1963, Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics.

[6]  Doutje T. van Veen,et al.  Symmetrical 25-Gb/s TDM-PON With 31.5-dB Optical Power Budget Using Only Off-the-Shelf 10-Gb/s Optical Components , 2016, Journal of Lightwave Technology.

[7]  Xiang Liu,et al.  Downstream transmission of pre-distorted 25-Gb/s Faster-than-Nyquist PON with 10G-class optics achieving over 31 dB link budget without optical amplification , 2016, 2016 Optical Fiber Communications Conference and Exhibition (OFC).

[8]  Xiang Liu,et al.  Experimental Demonstration of Cost-Effective Symmetric 100-Gb/s TWDM-PON Using 4x25-Gb/s Duobinary Channels Based on 10G-Class Optics , 2015 .

[9]  Erdal Panayirci,et al.  A new approach for evaluating the performance of a symbol timing recovery system employing a general type of nonlinearity , 1996, IEEE Trans. Commun..

[10]  Weisheng Hu,et al.  Experimental Demonstration of Symmetric 100-Gb/s DML-Based TWDM-PON System , 2015, IEEE Photonics Technology Letters.

[11]  L. Franks,et al.  Statistical Properties of Timing Jitter in a PAM Timing Recovery Scheme , 1974, IEEE Trans. Commun..

[12]  Xiang Liu,et al.  Demonstration of high-performance cost-effective 100-Gb/s TWDM-PON using 4×25-Gb/s optical duobinary channels with 16-GHz APD and receiver-side post-equalization , 2015, 2015 European Conference on Optical Communication (ECOC).

[13]  H. Griesser,et al.  40 Gb/s lane rate NG-PON using electrical/optical duobinary, PAM-4 and low complex equalizations , 2016, 2016 Optical Fiber Communications Conference and Exhibition (OFC).