標題: | Employing Hybrid sub-Nyquist Sampling Rates to Support Heterogeneous Services of Varying Capacity in 25-Gbps DDM-OFDM-PON |
作者: | Hsu, Jhih-Hao Yu, Min Wei, Chia-Chien Lin, Chi-Hsiang Lin, Chun-Ting Liu, Fumin Zhou, Lei Fang, LiMing 光電系統研究所 Institute of Photonic System |
關鍵字: | Delay-division multiplexing;sub-Nyquist sampling;orthogonal frequency-division multiplexing |
公開日期: | 1-四月-2018 |
摘要: | Delay-division-multiplexing (DDM) involves the use of signal preprocessing for the detection of data via sub-Nyquist analog-to-digital sampling, based on preallocated relative sampling delays among optical network users (ONUs) in an orthogonal frequency-division multiplexing (OFDM) passive optical network (PON). If a DDM-PON consists of M virtual groups, the sampling rate at the receivers is only 1/M of the Nyquist rate, but the maximum capacity of each ONU is fixed at 1/M of the total capacity. In this study, we developed a novel DDM scheme that uses hybrid sub-Nyquist sampling rates to accommodate heterogeneous services of different capacities in an OFDM-PON. To equalize the transmission performances using hybrid sub-Nyquist sampling rates, the modification of preprocessing was proposed, and its necessity was demonstrated. Without loss of generality, we experimentally demonstrated a 25-Gbps DDM-OFDM-PON using hybrid sampling at 1/2, 1/8, and 1/32 (or 1/8, 1/16, and 1/32) of the Nyquist rate. Compared to a DDM-PON with a fixed sub-Nyquist rate, the received signals based on hybrid sub-Nyquist sampling rates show similar sensitivities. A loss budget of 26 dB was experimentally achieved using all sub-Nyquist sampling rates after employing the modified preprocessing. |
URI: | http://dx.doi.org/10.1109/JPHOT.2018.2815619 http://hdl.handle.net/11536/144778 |
ISSN: | 1943-0655 |
DOI: | 10.1109/JPHOT.2018.2815619 |
期刊: | IEEE PHOTONICS JOURNAL |
Volume: | 10 |
顯示於類別: | 期刊論文 |