{"title":"下一代光网络:集成自适应FEC速率LDPC和高阶概率星座形成","authors":"Sunil Narayan Thool, Devendra Chack","doi":"10.1016/j.yofte.2025.104324","DOIUrl":null,"url":null,"abstract":"<div><div>To address the next-generation communication needs, we present a new framework to improve channel capacity. This framework combines forward error correction (FEC) rate Low-Density Parity-Check (LDPC) coding with advanced enhancements like higher-order modulation and Probabilistic Constellation Shaping (PCS). Our method targets the growing demands of 6G and future technologies. We examine LDPC code rates of 5/6, 8/9, and 9/10 for a fixed block length of 64,800 using 64-QAM and 256-QAM signals. The system features approximate 150 Gbaud symbol rate, capable of generating LDPC coded signals for both modulation schemes. Performance analysis over an optical channel shows the system’s resilience, even with phase noise from a laser source with a higher linewidth. We determine an optimized Optical Signal to Noise Ratio (OSNR) to meet Bit Error Rate (BER) targets of 10<sup>-6</sup> in an Additive White Gaussian Noise (AWGN) channel, ensuring strong performance. The study also explores information-theoretic metrics like Mutual Information (MI), Generalized Mutual Information (GMI), and Normalized GMI (NGMI) for both 64-QAM and 256-QAM signals. We compare the performance of PCS with uniformly distributed QAM signals, providing a thorough evaluation. Through detailed experimentation and analysis, this research offers valuable insights into the practicality and performance of the proposed system, marking a significant advancement in sophisticated optical communication systems for future networks.</div></div>","PeriodicalId":19663,"journal":{"name":"Optical Fiber Technology","volume":"94 ","pages":"Article 104324"},"PeriodicalIF":2.6000,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Next-generation optical networks: Integrating adaptive FEC rate LDPC and higher order probabilistic constellation shaping\",\"authors\":\"Sunil Narayan Thool, Devendra Chack\",\"doi\":\"10.1016/j.yofte.2025.104324\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>To address the next-generation communication needs, we present a new framework to improve channel capacity. This framework combines forward error correction (FEC) rate Low-Density Parity-Check (LDPC) coding with advanced enhancements like higher-order modulation and Probabilistic Constellation Shaping (PCS). Our method targets the growing demands of 6G and future technologies. We examine LDPC code rates of 5/6, 8/9, and 9/10 for a fixed block length of 64,800 using 64-QAM and 256-QAM signals. The system features approximate 150 Gbaud symbol rate, capable of generating LDPC coded signals for both modulation schemes. Performance analysis over an optical channel shows the system’s resilience, even with phase noise from a laser source with a higher linewidth. We determine an optimized Optical Signal to Noise Ratio (OSNR) to meet Bit Error Rate (BER) targets of 10<sup>-6</sup> in an Additive White Gaussian Noise (AWGN) channel, ensuring strong performance. The study also explores information-theoretic metrics like Mutual Information (MI), Generalized Mutual Information (GMI), and Normalized GMI (NGMI) for both 64-QAM and 256-QAM signals. We compare the performance of PCS with uniformly distributed QAM signals, providing a thorough evaluation. Through detailed experimentation and analysis, this research offers valuable insights into the practicality and performance of the proposed system, marking a significant advancement in sophisticated optical communication systems for future networks.</div></div>\",\"PeriodicalId\":19663,\"journal\":{\"name\":\"Optical Fiber Technology\",\"volume\":\"94 \",\"pages\":\"Article 104324\"},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2025-06-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Optical Fiber Technology\",\"FirstCategoryId\":\"94\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1068520025001993\",\"RegionNum\":3,\"RegionCategory\":\"计算机科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical Fiber Technology","FirstCategoryId":"94","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1068520025001993","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Next-generation optical networks: Integrating adaptive FEC rate LDPC and higher order probabilistic constellation shaping
To address the next-generation communication needs, we present a new framework to improve channel capacity. This framework combines forward error correction (FEC) rate Low-Density Parity-Check (LDPC) coding with advanced enhancements like higher-order modulation and Probabilistic Constellation Shaping (PCS). Our method targets the growing demands of 6G and future technologies. We examine LDPC code rates of 5/6, 8/9, and 9/10 for a fixed block length of 64,800 using 64-QAM and 256-QAM signals. The system features approximate 150 Gbaud symbol rate, capable of generating LDPC coded signals for both modulation schemes. Performance analysis over an optical channel shows the system’s resilience, even with phase noise from a laser source with a higher linewidth. We determine an optimized Optical Signal to Noise Ratio (OSNR) to meet Bit Error Rate (BER) targets of 10-6 in an Additive White Gaussian Noise (AWGN) channel, ensuring strong performance. The study also explores information-theoretic metrics like Mutual Information (MI), Generalized Mutual Information (GMI), and Normalized GMI (NGMI) for both 64-QAM and 256-QAM signals. We compare the performance of PCS with uniformly distributed QAM signals, providing a thorough evaluation. Through detailed experimentation and analysis, this research offers valuable insights into the practicality and performance of the proposed system, marking a significant advancement in sophisticated optical communication systems for future networks.
期刊介绍:
Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.