Iterative Forward Error Correction Decoding for Spectral Efficient Optical OFDM Transmission Systems

Lotz, T.; Sauer-Greff, W.; Urbansky, R.

doi:10.1364/sppcom.2010.sptha2

Cited by 2 publications

(2 citation statements)

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“…The achievable rate is bounded by the so-called generalized MI (GMI): R bicm ≤ I(b; L). • BICM with iterative demodulation (BICM-ID) [32], [43]- [45]: better performance than BICM with softdecision feedback from the decoder to the demodulator. The achievable rate is bounded by the averaged MI conditioned on feedback:…”

Section: B Coded Modulationmentioning

confidence: 99%

Iteration-Aware LDPC Code Design for Low-Power Optical Communications

Koike‐Akino

Millar

Kojima

et al. 2016

J. Lightwave Technol.

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Recent low-density parity-check (LDPC) codes have shown capacity-approaching performance for various communications systems. However, their promising performance cannot always be obtained due to practical constraints such as finite codeword length, finite iteration, finite memory, and finite precision. In this paper, we focus on a practical design method of highperformance LDPC codes under a constraint of finite-iteration decoding for low-power optical communications. We introduce an iteration-aware LDPC code design approach, which is based on decoding trajectory in extrinsic information transfer (EXIT) chart analysis. It is demonstrated that an LDPC code designed by the conventional curve-fitting method exhibits nearly 2 dB of penalty when the maximum number of iterations is limited. The results suggest that the LDPC code should be adaptively changed, e.g., when the number of decoding iterations is decreased to save power consumption. We also extend our design method to a multiobjective optimization concept by taking average degrees into account, so that the threshold and the computational complexity are minimized at the same time. The proposed Pareto-optimal codes can achieve additional 2 dB gain or 50% complexity reduction at maximum, in low-power decoding scenarios.

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Section: B Coded Modulationmentioning

confidence: 99%

Iteration-Aware LDPC Code Design for Low-Power Optical Communications

Koike‐Akino

Millar

Kojima

et al. 2016

J. Lightwave Technol.

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show abstract

“…Therefore, we extend the BICM system applying iterative demapping (BICM-ID)-initially proposed by ten Brink, 32 successfully applied to antiGray mapped optical OFDM subcarriers by Lotz 33 and recently also investigated for specific 4-D constellations by Batshon 34 -to compensate for this significant performance degradation. In principle, the constellation constrained capacity can be approached for all mappings in BICM-ID.…”

Section: Bit-interleaved Coded Modulation With Iterative Demappingmentioning

confidence: 99%