Adaptive Loading Algorithms for IMDD Optical OFDM PON Systems Using Directly Modulated Lasers

作者：Giacoumidis E^*; Kavatzikidis A; Tsokanos A; Tang J M; Tomkos I

来源：Journal of Optical Communications and Networking, 2012, 4(10): 769-778.

DOI：10.1364/JOCN.4.000769

• Modulation
• Multiplexing
• OFDM
• Optical fiber communication
• Wavelength-division multiplexing

A detailed study on the effectiveness of three proposed optical orthogonal frequency-division multiplexing (OOFDM) adaptive loading algorithms (ALAs) is conducted, addressing, for the first time, a number of crucial issues related to OOFDM directly modulated laser-based intensity-modulated and direct-detected passive optical networks (PONs). The ALAs include the power loading (PL), bit loading, and bit-and-power loading (BPL) algorithms. It is shown that in comparison with the most sophisticated BPL algorithm, the simplest PL algorithm is effective in escalating a single-channel OOFDM PON performance to its maximum potential. On the other hand, for multi-channel OOFDM PON and when employing a large number of subcarriers and high digital-to-analog/analog-to-digital converter sampling speed, the BPL algorithm should be adopted. The utilization of the three ALAs can also extend the optimum clipping ratio range up to at least 3 dB compared to a conventional identical modulation scheme.

• 出版日期2012-10