Polarization-multiplexed rate-adaptive non-binary-quasi-cyclic-LDPC-coded multilevel modulation with coherent detection for optical transport networks

Arabaci, Murat; Djordjević, Ivan B.; Saunders, Ross; Marcoccia, R.

doi:10.1364/oe.18.001820

Cited by 63 publications

(35 citation statements)

References 26 publications

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“…As aforementioned in section 2, the 4-ary QC-LDPC code used in our experiment was obtained by assigning nonzero elements from GF(4) to the 1s in the parity-check matrix of this binary QC-LDPC code. Further details on nonzero element assignment can be found in [4]. The operational flow can be summarized as follows.…”

Section: Resultsmentioning

confidence: 99%

“…Given these definitions, we can describe the layered decoding algorithm by the pseudo code given in Fig.2. The core operation performed at the check nodes of the layered decoder, denoted by Ψ in the pseudo code, is the same as the core operation of the flooding decoder which was described in detail in [4]. The distinguishing feature of the layered decoding algorithm is the utilization of the updated messages faster in decoding.…”

Section: Nonbinary Ldpc Codes and Their Decodingmentioning

confidence: 99%

“…In particular, coded modulation techniques [3] combining high spectral efficiency modulation formats with component LDPC codes -commonly referred to as bit-interleaved LDPC-coded modulation techniques -have been shown to be promising approaches that can meet ever-increasing demands for higher speed transmission over optical fiber links [1], [2]. Recently, we proposed the use of nonbinary LDPC codes as component codes in coded modulation schemes suitable for optical fiber communication [4]. Our studies revealed that the proposed nonbinary LDPC-coded modulation (NB-LDPC-CM) schemes can provide higher net coding gains and reduce latency and computational complexity at receivers compared to its binary LDPC-coded modulation counterparts.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental evaluation of high-speed optical fiber communication using nonbinary LDPC coded modulation with layered decoding

Arabaci

Djordjević

2011

2011 13th International Conference on Transparent Optical Networks

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In this paper, we present a reduced-latency nonbinary low-density parity-check (LDPC) coded modulation scheme suitable for high-speed optical fiber communication featuring the layered LDPC decoding algorithm. The use of the layered decoder in place of the conventional flooding decoder helps reduce by half the number of iterations taken in decoding. This in turn reduces the decoding latency, increases the decoding throughput, and significantly lowers the power consumption at the receiving ends of optical transport networks. We show by using the experimental data collected from a 4-ary rate-0.8 LDPC-coded NRZ-DQPSK modulation system that layered decoding indeed halves the required number of decoding iterations. We also show that, in the back-toback configuration, even with a single iteration of layered decoding, one can attain a 7 dB gain in performance at the bit error ratio (BER) of 10 -5 when compared to using only the maximum a posteriori probability detector output based on the Bahl-Cocke-Jelinek-Raviv (BCJR) algorithm.

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Section: Resultsmentioning

confidence: 99%

Section: Nonbinary Ldpc Codes and Their Decodingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental evaluation of high-speed optical fiber communication using nonbinary LDPC coded modulation with layered decoding

Arabaci

Djordjević

2011

2011 13th International Conference on Transparent Optical Networks

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“…5. We employ regular girth-10 LDPC code with length 16935 and rate 0.8 as the mother code [14]. Sumproduct algorithm is then used in the decoding process.…”

Section: Nonbinary Quasi-cyclic Ldpc Coding For 9-qammentioning

confidence: 99%

Advanced GF(3^2) nonbinary LDPC coded modulation with non-uniform 9-QAM outperforming star 8-QAM

2016

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Abstract:In this paper, we first describe a 9-symbol non-uniform signaling scheme based on Huffman code, in which different symbols are transmitted with different probabilities. By using the Huffman procedure, prefix code is designed to approach the optimal performance. Then, we introduce an algorithm to determine the optimal signal constellation sets for our proposed non-uniform scheme with the criterion of maximizing constellation figure of merit (CFM). The proposed nonuniform polarization multiplexed signaling 9-QAM scheme has the same spectral efficiency as the conventional 8-QAM. Additionally, we propose a specially designed GF(3 2 ) nonbinary quasi-cyclic LDPC code for the coded modulation system based on the 9-QAM non-uniform scheme. Further, we study the efficiency of our proposed non-uniform 9-QAM, combined with nonbinary LDPC coding, and demonstrate by Monte Carlo simulation that the proposed GF(2 3 ) nonbinary LDPC coded 9-QAM scheme outperforms nonbinary LDPC coded uniform 8-QAM by at least 0.8dB. Peckham, "Coded PDM-OFDM transmission with shaped 256-iterative-polar-modulation achieving 11.15-b/s/Hz intrachannel spectral efficiency and 800-km reach," J. Lightwave Technol. 31(4), 538-545 (2013).

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“…The FEC operating in large Galois field (GF) that matches the size of multilevel modulation formats, called the non-binary FEC coded modulation, which deals with modulation symbol directly was reported in [3]. Due to the extensively computation complexity of the nonbinary CM, the binary FEC together with a soft de-mapper that maps symbol to bit is widely adopted both in simulation and experimental demonstrations, and it has been shown that capacity approaching performance are possible even with binary CM [4,5].…”

Section: Introductionmentioning

confidence: 99%

FPGA-based LDPC-coded APSK for optical communication systems

2017

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Abstract:In this paper, with the aid of mutual information and generalized mutual information (GMI) capacity analyses, it is shown that the geometrically shaped APSK that mimics an optimal Gaussian distribution with equiprobable signaling together with the corresponding gray-mapping rules can approach the Shannon limit closer than conventional quadrature amplitude modulation (QAM) at certain range of FEC overhead for both 16-APSK and 64-APSK. The field programmable gate array (FPGA) based LDPC-coded APSK emulation is conducted on block interleaver-based and bit interleaver-based systems; the results verify a significant improvement in hardware efficient bit interleaver-based systems. In bit interleaver-based emulation, the LDPC-coded 64-APSK outperforms 64-QAM, in terms of symbol signal-to-noise ratio (SNR), by 0.1 dB, 0.2 dB, and 0.3 dB at spectral efficiencies of 4.8, 4.5, and 4.2 b/s/Hz, respectively. It is found by emulation that LDPC-coded 64-APSK for spectral efficiencies of 4.8, 4.5, and 4.2 b/s/Hz is 1.6 dB, 1.7 dB, and 2.2 dB away from the GMI capacity.

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Polarization-multiplexed rate-adaptive non-binary-quasi-cyclic-LDPC-coded multilevel modulation with coherent detection for optical transport networks

Cited by 63 publications

References 26 publications

Experimental evaluation of high-speed optical fiber communication using nonbinary LDPC coded modulation with layered decoding

Experimental evaluation of high-speed optical fiber communication using nonbinary LDPC coded modulation with layered decoding

Advanced GF(3^2) nonbinary LDPC coded modulation with non-uniform 9-QAM outperforming star 8-QAM

FPGA-based LDPC-coded APSK for optical communication systems

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