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Forward error correcting code for high data rate LEO satellite optical downlinks

S. Poulenard, B. Gadat, J. F. Chouteau, T. Anfray, C. Poulliat, C. Jego, O. Hartmann, G. Artaud, H. Meric, Nikos Karafolas, Zoran Sodnik, Bruno Cugny
2019 International Conference on Space Optics — ICSO 2018  
A sub-class of regular Low-Density Parity-Check codes is shown to be an interesting alternative to current space communication standard for optical links that require low error floor and high decoder throughput  ...  This framework is used to jointly design interleaving and FEC schemes for free space optical link.  ...  ACKNOWLEDGEMENTS The work presented in this study was funded by CNES for the R&T DS/NT/ST-2017.0010579. We want to thank ONERA-DOTA for the fruitful discussion.  ... 
doi:10.1117/12.2536120 fatcat:xaax4xc55zcpzcfhbljbezs6c4

Four-Dimensional Nonbinary LDPC-Coded Modulation Schemes for Ultra-High-Speed Optical Fiber Communication

Murat Arabaci, Ivan B. Djordjevic, Lei Xu, Ting Wang
2011 IEEE Photonics Technology Letters  
solution for optical fiber communication systems than the prior-art bit-interleaved LDPC-coded modulation (BI-LDPC-CM) scheme.  ...  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  ...  links.  ... 
doi:10.1109/lpt.2011.2159968 fatcat:mlw34apaznga7lrp4dnbnwyxqy

Multilevel coding in free-space optical MIMO transmission with Q-ary PPM over the atmospheric turbulence channel

I.B. Djordjevic, B. Vasic, M.A. Neifeld
2006 IEEE Photonics Technology Letters  
We propose an efficient coded modulation scheme for multiple input/multiple output free-space optical systems with -ary pulse-position modulation.  ...  FSO communication is an attractive and cost-effective solution for high-rate image, voice, and data transmission [1]-[3].  ...  Because the inherently large delay of the multistage decoding algorithm is not acceptable in high-speed applications, our scheme employs a simplified multistage decoding known as parallel independent decoding  ... 
doi:10.1109/lpt.2006.877576 fatcat:oeodersowveedhd354ljwn4vgq

Experimental study of non-binary LDPC coding for long-haul coherent optical QPSK transmissions

Shaoliang Zhang, Murat Arabaci, Fatih Yaman, Ivan B. Djordjevic, Lei Xu, Ting Wang, Yoshihisa Inada, Takaaki Ogata, Yasuhiro Aoki
2011 Optics Express  
Potential issues like phase ambiguity and coding length are also discussed when implementing LDPC in current coherent optical systems.  ...  The performance of rate-0.8 4-ary LDPC code has been studied in a 50GHz-spaced 40Gb/s DWDM system with PDM-QPSK modulation. The net effective coding gain of 10dB is obtained at BER of 10 −6 .  ...  Acknowledgments The authors would like to thank Jiaojiao Fu from Zhejiang University for her help and useful discussions during this experiment. I. B.  ... 
doi:10.1364/oe.19.019042 pmid:21996844 fatcat:ivx57urkjfhrdbmiq3fdnufb5y

LDPC-coded orbital angular momentum (OAM) modulation for free-space optical communication

Ivan B. Djordjevic, Murat Arabaci
2010 Optics Express  
An orbital angular momentum (OAM) based LDPC-coded modulation scheme suitable for use in FSO communication is proposed.  ...  Both binary and nonbinary LDPC-coded OAM modulations are studied. In addition to providing better BER performance, the nonbinary LDPC-coded modulation reduces overall decoder complexity and latency.  ...  speeds by using LDPC codes at each level.  ... 
doi:10.1364/oe.18.024722 pmid:21164819 fatcat:snf2424korf3rkpmkwtmzz4gny

Performance of Hybrid RF/FSO Cooperative Systems Based on Quasicyclic LDPC Codes and Space-Coupled LDPC Codes

Ibrahima Gueye, Ibra Dioum, Idy Diop, K. Wane Keita, Papis Ndiaye, Moussa Diallo, Sidi Mohamed Farssi, Javier Prieto
2020 Wireless Communications and Mobile Computing  
FSO systems are particularly attractive for last mile access problem by bridging fiber optic backbone connectivity to RF access networks.  ...  We also use the space-coupled low-density parity check (SC-LDPC) codes on the same scheme to show its importance in cooperative optical transmission but also in hybrid RF/FSO transmission.  ...  On the contrary, free space optical (FSO) communication systems have obtained the attention of convincing research due to its supremacy in the unlicensed optical spectrum, high bandwidth, high capacity  ... 
doi:10.1155/2020/8814588 fatcat:st3aou7zaraijkyndcjzbafdsm

Neural Turbo Equalization: Deep Learning for Fiber-Optic Nonlinearity Compensation [article]

Toshiaki Koike-Akino, Ye Wang, David S. Millar, Keisuke Kojima, Kieran Parsons
2019 arXiv   pre-print
In this paper, we propose a turbo equalization (TEQ) based on DNN as a new alternative framework to deal with nonlinear fiber impairments for future coherent optical communications.  ...  We also demonstrate that optimizing irregular low-density parity-check (LDPC) codes to match EXIT chart of the DNN-TEQ can improve achievable rates by up to 0.12 b/s/Hz.  ...  Combined EXIT chart [52] of DNN-TEQ & LDPC decoder for DVB-S2 code rate 9/10 (DP-16QAM in 16-span DM links at −2 dBm).  ... 
arXiv:1911.10131v1 fatcat:7ghe4qetcbejphjkftl54l3zeq

LDPC-Coded OFDM for Heterogeneous Access Optical Networks

Ivan B Djordjevic, Hussam G Batshon
2010 IEEE Photonics Journal  
We show that with the proposed heterogeneous communication systems, we can deliver a high-speed optical signal (40 Gb/s and beyond) to an end-user.  ...  In this paper, we propose a heterogeneous optical access networking scenario, in which communication links between source and destination nodes are heterogeneous, composed of free-space optical, plastic  ...  With HON, we can deliver a high-speed optical signal, i.e., 40 Gb/s and beyond, to an end-user by using free-space optical (FSO), plastic optical fiber (POF)/multimode fiber (MMF), and indoor optical wireless  ... 
doi:10.1109/jphot.2010.2051943 fatcat:45qc576qnrdk5cz5lwwz4yiaky

Generalized hybrid subcarrier/amplitude/phase/polarization LDPC-coded modulation based FSO networking

Ivan B. Djordjevic, Hussam G. Batshon
2010 2010 12th International Conference on Transparent Optical Networks  
In this paper, we propose a generalized hybrid subcarrier/amplitude/phase/polarization (GH-SAPP) modulation based free-space optical (FSO) communication network.  ...  The proposed scheme represents a cost effective solution to current high-bandwidth demands.  ...  In Fig. 5 -right, we provide simulation results for LDPC-coded scenario, obtained for 25 LDPC decoder iterations and three APP demapper-LDPC decoder iterations.  ... 
doi:10.1109/icton.2010.5549018 fatcat:zlhgwejievadtm6msnqezrm32e

Long Irregular LDPC coded OFDM with Soft Decision

Madhusmita Mishra, Sarat Kumar Patra, Ashok Kumar Turuk
2012 International Journal of Computer Applications  
OFDM with quadrature amplitude modulation (QAM) technique can be used for high speed optical applications. Increasing the order of modulation, the bit error rate (BER) increases.  ...  Through simulation, we have shown the advantages of using this long Irregular LDPC coded OFDM link in Optical wireless communication (OWC).  ...  Hence , we can use this code with higher order QAM modulated OFDM for improving performance of optical AWGN channel in Free space optical communication .  ... 
doi:10.5120/8878-2863 fatcat:zgyd2afrtzg5ndhtbuzuije4ce

FPGA implementation of advanced FEC schemes for intelligent aggregation networks

Ding Zou, Ivan B. Djordjevic, Atul K. Srivastava, Werner Weiershausen, Benjamin B. Dingel, Achyut K. Dutta
2016 Optical Metro Networks and Short-Haul Systems VIII  
rate range, by FPGA-based emulation, making it a viable solution in the next-generation high-speed intelligent aggregation networks.  ...  While it is important to closely approach the Shannon limit by using turbo product codes (TPC) and lowdensity parity-check (LDPC) codes with soft-decision decoding (SDD) algorithm; rate-adaptive techniques  ...  ACKNOWLEDGMENT This work was supported in part by NSF ERC Center for Integrated Access Networks (CIAN) under grant EEC-0812072 as well as by MURI ONR program.  ... 
doi:10.1117/12.2214884 fatcat:dbrmqmdvbjbj7b6vetnxnlrqda

LDPC coded OFDM over the atmospheric turbulence channel

Ivan B. Djordjevic, Bane Vasic, Mark A. Neifeld
2007 Optics Express  
References and Links 1. X. Zhu, and J. M. Kahn, "Free-space optical communication through atmospheric turbulence channels," IEEE Trans. Commun. 50, 1293-1300 (2002). 2. M. A. Al-Habash, L. C.  ...  Kahn, "Markov chain model in maximum-likelihood sequence detection for free-space optical communication through atmospheric turbulence channels," J.  ...  Anguita for his involvement in an earlier work on LDPC codes for FSO communication and for useful discussions.  ... 
doi:10.1364/oe.15.006336 pmid:19546938 fatcat:st7732mrpna5blqpu4dycpzada

Multidimensional Pulse-Position Coded-Modulation for Deep-Space Optical Communication

Ivan B. Djordjevic
2011 IEEE Photonics Technology Letters  
The -dimensional PPM (ND-PPM) can, therefore, be used to solve the high-bandwidth requirements of future deep-space optical communications.  ...  In order to achieve multigigabit transmission (projected for 2020) for the use in interplanetary communications, in this letter, we propose the use of multidimensional pulse-position modulation (PPM).  ...  DEEP-SPACE OPTICAL COMMUNICATIONS BASED ON LDPC-CODED ND-PPM In this section, we provide a detailed description of our proposed -dimensional pulse-position modulation (ND-PPM) approach to enable ultra-high-speed  ... 
doi:10.1109/lpt.2011.2160940 fatcat:ykk24qfmqvhs3mea4ljpswvllq

Deep-space and near-Earth optical communications by coded orbital angular momentum (OAM) modulation

Ivan B. Djordjevic
2011 Optics Express  
scheme is a promising candidate for next generation deep-space and near-Earth optical communications.  ...  The proposed OAM-based schemes, therefore, represent the excellent candidates for next generation deep-space and near-Earth optical communications.  ...  The bit LLRs needed for LDPC decoders are calculated in the bit LLR calculation block in similar fashion to that described in Section 2.  ... 
doi:10.1364/oe.19.014277 pmid:21934792 fatcat:osc2eg5iibdlxcmsx5ulvgegw4

Efficient Channel Coding Scheme for Optical Memory: An Overview

Jesna Jose
2019 International Journal for Research in Applied Science and Engineering Technology  
The high potential of LDPC codes, binary and nonbinary LDPC decoding algorithms for the optical system is implemented in FPGA using VHDL language.  ...  The research is focused to design a hardware for optical memory. The hardware is designed with LDPC algorithm.  ...  By using LDPC encoder I design an optical memory with high data security and high-speed grade. In future the system research for algorithms with less complexity and power consumption.  ... 
doi:10.22214/ijraset.2019.4021 fatcat:b3duvylhnfcyjnhj56iosq2cfe
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