Wireless Real-Time Transmission of 101GHz Terahertz Signals over 19.6 km: Fully Solid-State Prototype Design and Experimental Validations

Wireless Real-Time Transmission of 101GHz Terahertz Signals over 19.6 km: Fully Solid-State Prototype Design and Experimental Validations | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Wireless Real-Time Transmission of 101GHz Terahertz Signals over 19.6 km: Fully Solid-State Prototype Design and Experimental Validations Zicheng Xu, Ke Liu, Wenrong Chen, Lingxiang Li, Jinpeng Song, and 2 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7730911/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 9 You are reading this latest preprint version Abstract This study addresses the growing demand in modern military communications for high throughput, long-range transmission, with strong anti-eavesdropping capability. We design a spread spectrum-based terahertz (THz) wireless transmission system operating at 101 GHz, and conduct field trials over 10.9 km and 19.6 km. To address the key signal processing challenges, three tailored algorithms are introduced: (1) a stage-wise digital predistortion (DPD) method based on iterative learning architecture (ILA) to compensate for power amplifier (PA) nonlinearities; (2) a low-complexity energy aggregation strategy that enables robust synchronization of long spreading codes at low SNR; (3) a decision-directed least mean square (DD-LMS) algorithm to adaptively suppresses local oscillator (LO) induced phase noise. Field experiments demonstrate a stable over-the-air throughput of 2.25 Gbps over 19.6 km, while spread-spectrum processing enhances interference resilience. These results confirm that the proposed prototype offers a practical and effective solution for secure, long-distance THz communications, with strong potential for deployment in complex military scenarios. Physical sciences/Engineering Physical sciences/Physics terahertz communications long-distance transmission real-time signal processing baseband design Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 02 Nov, 2025 Reviews received at journal 02 Nov, 2025 Reviews received at journal 13 Oct, 2025 Reviewers agreed at journal 09 Oct, 2025 Reviewers agreed at journal 09 Oct, 2025 Reviewers invited by journal 09 Oct, 2025 Editor assigned by journal 07 Oct, 2025 Submission checks completed at journal 07 Oct, 2025 First submitted to journal 27 Sep, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7730911","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":529038407,"identity":"87bfbed3-51b8-4e2c-9812-44f654c6f878","order_by":0,"name":"Zicheng Xu","email":"","orcid":"","institution":"University of Electronic Science and Technology of China","correspondingAuthor":false,"prefix":"","firstName":"Zicheng","middleName":"","lastName":"Xu","suffix":""},{"id":529038408,"identity":"660a2083-c84a-4674-8dc3-408a1a576576","order_by":1,"name":"Ke Liu","email":"","orcid":"","institution":"University of Electronic Science and Technology of 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