{"title":"时变信道上的新型嵌入式先导辅助 OCDM 系统","authors":"Zhaopeng Du;Lin Mei;Xu Lin;Zhiyang Li;Bo Zhang","doi":"10.1109/LCOMM.2024.3436579","DOIUrl":null,"url":null,"abstract":"In this letter, we propose a novel embedded pilot orthogonal chirp division multiplexing (OCDM) system. This system is mainly used for time-varying (TV) channels to reduce the overhead of OCDM channel estimation. In this system, a novel embedded chirp pilot arrangement in the discrete Fresnel domain with low overhead is designed. Furthermore, two channel estimation strategies are proposed for this pilot arrangement: a low-complexity data interference avoidance (IA) strategy and a higher-performance data interference suppression (IS) strategy. For the IS strategy, we also develop a novel channel estimator. Through simulation and analysis, we have demonstrated that the proposed system effectively improves the spectrum efficiency, energy efficiency, and transmission rate (SET) compared to traditional embedded pilot OCDM systems, while maintaining similar performance levels.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"28 11","pages":"2643-2647"},"PeriodicalIF":3.7000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A Novel Embedded Pilot-Aided OCDM System Over Time-Varying Channels\",\"authors\":\"Zhaopeng Du;Lin Mei;Xu Lin;Zhiyang Li;Bo Zhang\",\"doi\":\"10.1109/LCOMM.2024.3436579\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this letter, we propose a novel embedded pilot orthogonal chirp division multiplexing (OCDM) system. This system is mainly used for time-varying (TV) channels to reduce the overhead of OCDM channel estimation. In this system, a novel embedded chirp pilot arrangement in the discrete Fresnel domain with low overhead is designed. Furthermore, two channel estimation strategies are proposed for this pilot arrangement: a low-complexity data interference avoidance (IA) strategy and a higher-performance data interference suppression (IS) strategy. For the IS strategy, we also develop a novel channel estimator. Through simulation and analysis, we have demonstrated that the proposed system effectively improves the spectrum efficiency, energy efficiency, and transmission rate (SET) compared to traditional embedded pilot OCDM systems, while maintaining similar performance levels.\",\"PeriodicalId\":13197,\"journal\":{\"name\":\"IEEE Communications Letters\",\"volume\":\"28 11\",\"pages\":\"2643-2647\"},\"PeriodicalIF\":3.7000,\"publicationDate\":\"2024-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Communications Letters\",\"FirstCategoryId\":\"94\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/10620265/\",\"RegionNum\":3,\"RegionCategory\":\"计算机科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"TELECOMMUNICATIONS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Communications Letters","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/10620265/","RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"TELECOMMUNICATIONS","Score":null,"Total":0}
引用次数: 0
摘要
在这封信中，我们提出了一种新型嵌入式先导正交啁啾分复用（OCDM）系统。该系统主要用于时变（TV）信道，以减少 OCDM 信道估计的开销。在该系统中，设计了一种低开销的离散菲涅尔域嵌入式啁啾先导排列。此外，还为这种先导安排提出了两种信道估计策略：低复杂度的数据干扰规避（IA）策略和更高性能的数据干扰抑制（IS）策略。针对 IS 策略，我们还开发了一种新型信道估计器。通过仿真和分析，我们证明与传统的嵌入式先导 OCDM 系统相比，所提出的系统能有效提高频谱效率、能效和传输速率（SET），同时保持相似的性能水平。
A Novel Embedded Pilot-Aided OCDM System Over Time-Varying Channels
In this letter, we propose a novel embedded pilot orthogonal chirp division multiplexing (OCDM) system. This system is mainly used for time-varying (TV) channels to reduce the overhead of OCDM channel estimation. In this system, a novel embedded chirp pilot arrangement in the discrete Fresnel domain with low overhead is designed. Furthermore, two channel estimation strategies are proposed for this pilot arrangement: a low-complexity data interference avoidance (IA) strategy and a higher-performance data interference suppression (IS) strategy. For the IS strategy, we also develop a novel channel estimator. Through simulation and analysis, we have demonstrated that the proposed system effectively improves the spectrum efficiency, energy efficiency, and transmission rate (SET) compared to traditional embedded pilot OCDM systems, while maintaining similar performance levels.
期刊介绍：
The IEEE Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of communication over different media and channels including wire, underground, waveguide, optical fiber, and storage channels. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of communication systems.
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