Title :
Four-Dimensional Nonbinary LDPC-Coded Modulation Schemes for Ultra-High-Speed Optical Fiber Communication
Author :
Arabaci, Murat ; Djordjevic, Ivan B. ; Xu, Lei ; Wang, Ting
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Arizona, Tucson, AZ, USA
Abstract :
In this letter, we propose a four-dimensional (4-D) nonbinary low-density parity-check-coded modulation (NB-LDPC-CM) scheme suitable for beyond 100-Gb/s optical fiber communication. Incorporating spectrally efficient modulation formats to achieve high aggregate bit rates and nonbinary LDPC codes for forward error correction (FEC), the proposed scheme offers a superior advanced FEC solution for optical fiber communication systems than the prior-art bit-interleaved LDPC-coded modulation (BI-LDPC-CM) scheme. Compared to the previously reported bit error rate (BER) performance results of BI-LDPC-CM, the proposed scheme offers additional net coding gains (NCGs) of 0.29 dB, 1.17 dB, and 2.17 dB at the BER of 10-7 when 16-, 32-, and 64-point 4-D constellations are used, respectively.
Keywords :
error statistics; forward error correction; interleaved codes; modulation coding; optical fibre networks; optical modulation; parity check codes; BER performance; BI-LDPC-CM scheme; advanced FEC solution; bit error rate; forward error correction; four-dimensional NB-LDPC-CM scheme; four-dimensional nonbinary LDPC-coded modulation schemes; gain 0.29 dB; gain 1.17 dB; gain 2.17 dB; low density parity check code; modulation formats; net coding gains; prior-art bit-interleaved LDPC-coded modulation; ultrahigh-speed optical fiber communication; Decoding; Forward error correction; Iterative decoding; Modulation; Optical fiber communication; Signal to noise ratio; Coded modulation; forward error correction (FEC); low-density parity-check (LDPC) codes; optical fiber communication;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2159968
