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We propose a symbol synchronization scheme based on Gold sequences modulated on a single pilot subcarrier for the OFDMA-PON. The IMDD real-time experimental demonstrations are carried out with two ONUs and one OLT. The results show that the accurate symbol synchronization can be achieved at received optical power of −21dBm on the condition of SFO range from 0ppm to 70ppm between two ONUs.
Requirements on adaptive equalization of 25Gb/s NRZ transmission system for 10G-class optics based NG-EPON are analysed with FFE, DFE and MLSE. Experimental results show that combination of FFE and DFE can achieve similar performance in B2B case and about 1.2 dB decline for 25-km transmission case compared to MLSE.
A sampling frequency offset (SFO) estimation and compensation scheme for asynchronous optical intensity-modulation and direct-detection orthogonal frequency division multiplexing (OFDM) systems by using one single pilot subcarrier is proposed. Experimental demonstrations are also under taken to evaluate the performance of the mentioned scheme, and results show that precise SFO estimation with an accuracy...
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