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Proceedings Paper

Constellation design for next-generation hierarchically-modulated PON systems
Author(s): Naotaka Shibata; Noriko Iiyama; Jun-ichi Kani; Sang-Yuep Kim; Jun Terada; Naoto Yoshimoto
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Paper Abstract

In this paper, we study the performance of star quadrature amplitude modulation (QAM) signals with various constellations for hierarchically-modulated PON systems that overlay an over 20-Gbps PSK signal on a 10-Gbps on-off keying (OOK) signal; previous work examined only the performance of an 8-star QAM signal. A star QAM signal consists of a PSK signal with lower amplitude (inner-PSK signal) and a PSK signal with higher amplitude (outer-PSK signal). We propose to decrease the modulation level of the inner-PSK signal and increase that of the outer-PSK signal with the goal of improving the bit error rate performance in some conditions. Simulations indicate the minimum required received power for the various constellations examined: it is shown that effective design depends on the extinction ratio. For example, 10-star QAM improves the minimum required received power by 3 dB compared to 8-star QAM when the extinction ratio is 12 dB.

Paper Details

Date Published: 4 February 2013
PDF: 6 pages
Proc. SPIE 8645, Broadband Access Communication Technologies VII, 864507 (4 February 2013); doi: 10.1117/12.2003502
Show Author Affiliations
Naotaka Shibata, NTT Access Network Service System Labs. (Japan)
Noriko Iiyama, NTT Access Network Service System Labs. (Japan)
Jun-ichi Kani, NTT Access Network Service System Labs. (Japan)
Sang-Yuep Kim, NTT Access Network Service System Labs. (Japan)
Jun Terada, NTT Access Network Service System Labs. (Japan)
Naoto Yoshimoto, NTT Access Network Service System Labs. (Japan)


Published in SPIE Proceedings Vol. 8645:
Broadband Access Communication Technologies VII
Benjamin B. Dingel; Raj Jain; Katsutoshi Tsukamoto, Editor(s)

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