Pub Date : 2025-12-11DOI: 10.1109/LWC.2025.3643430
Menghan Li;Yulin Shao;Runxin Zhang;Lu Lu
This letter re-examines the conventional view that hybrid optical-radio frequency (O-RF) systems are primarily diversity-driven networks that switch between RF and optical links for robustness. Instead, we uncover a new architectural opportunity: repurposing the optical downlink to enable real-time feedback channel coding over the RF uplink, where structured decoder feedback is delivered from the access point to guide the transmitter’s coding strategy. This insight marks a conceptual paradigm shift from passive link diversity to active cross-band collaboration, where the wideband, interference-free optical wireless communication (OWC) is no longer merely a downlink backup but a functional enabler of uplink reliability. To realize this vision, we propose a novel architecture, O-RF with Cross-Band Feedback (O-RF-CBF), that exploits the optical downlink feedback to facilitate adaptive RF uplink coding. Numerical results reveal that O-RF-CBF achieves significant uplink throughput gains over traditional O-RF systems. Our findings highlight that inter-band synergy, not redundancy, is the key to unlocking the full potential of hybrid wireless networks.
{"title":"From Link Diversity to Cross-Band Feedback Collaboration: A New Perspective on Hybrid Optical-RF Systems","authors":"Menghan Li;Yulin Shao;Runxin Zhang;Lu Lu","doi":"10.1109/LWC.2025.3643430","DOIUrl":"10.1109/LWC.2025.3643430","url":null,"abstract":"This letter re-examines the conventional view that hybrid optical-radio frequency (O-RF) systems are primarily diversity-driven networks that switch between RF and optical links for robustness. Instead, we uncover a new architectural opportunity: repurposing the optical downlink to enable real-time feedback channel coding over the RF uplink, where structured decoder feedback is delivered from the access point to guide the transmitter’s coding strategy. This insight marks a conceptual paradigm shift from passive link diversity to active cross-band collaboration, where the wideband, interference-free optical wireless communication (OWC) is no longer merely a downlink backup but a functional enabler of uplink reliability. To realize this vision, we propose a novel architecture, O-RF with Cross-Band Feedback (O-RF-CBF), that exploits the optical downlink feedback to facilitate adaptive RF uplink coding. Numerical results reveal that O-RF-CBF achieves significant uplink throughput gains over traditional O-RF systems. Our findings highlight that inter-band synergy, not redundancy, is the key to unlocking the full potential of hybrid wireless networks.","PeriodicalId":13343,"journal":{"name":"IEEE Wireless Communications Letters","volume":"15 ","pages":"955-959"},"PeriodicalIF":5.5,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145729008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-11DOI: 10.1109/lwc.2025.3643497
Özlem Şeker, Umut Can Çabuk, Gökhan Dalkılıç
{"title":"Introducing AES and ECDSA to BLE Communication for Enhanced Security","authors":"Özlem Şeker, Umut Can Çabuk, Gökhan Dalkılıç","doi":"10.1109/lwc.2025.3643497","DOIUrl":"https://doi.org/10.1109/lwc.2025.3643497","url":null,"abstract":"","PeriodicalId":13343,"journal":{"name":"IEEE Wireless Communications Letters","volume":"5 1","pages":""},"PeriodicalIF":6.3,"publicationDate":"2025-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145728999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-10DOI: 10.1109/LWC.2025.3642429
Jiaxuan Li;Yilong Chen;Fan Liu;Jie Xu
This letter addresses the joint air corridor planning and base station (BS) deployment problem for low-altitude integrated sensing and communication (ISAC) networks. In the considered system, unmanned aerial vehicles (UAVs) operate within a structured air corridor composed of connected cubic segments, and multiple BSs need to be selectively deployed at a set of candidate locations to ensure both sensing and communication coverage throughout the corridor. In particular, we leverage the channel knowledge map (CKM) to characterize wireless channels for candidate BS sites prior to deployment, thereby facilitating the offline planning. Under this setup, we minimize the system cost in terms of the weighted sum of the air corridor length and the number of deployed BSs, subject to the constraints on both sensing and communication performance across the corridor. To solve the formulated large-scale nonconvex integer programming problem, we develop a hierarchical coarse-to-fine grid decomposition algorithm. Simulation results demonstrate the benefit of the proposed joint design in reducing the overall deployment cost while ensuring the coverage of the low-altitude ISAC networks.
{"title":"Channel Knowledge Map Enabled Low-Altitude ISAC Networks: Joint Air Corridor Planning and Base Station Deployment","authors":"Jiaxuan Li;Yilong Chen;Fan Liu;Jie Xu","doi":"10.1109/LWC.2025.3642429","DOIUrl":"10.1109/LWC.2025.3642429","url":null,"abstract":"This letter addresses the joint air corridor planning and base station (BS) deployment problem for low-altitude integrated sensing and communication (ISAC) networks. In the considered system, unmanned aerial vehicles (UAVs) operate within a structured air corridor composed of connected cubic segments, and multiple BSs need to be selectively deployed at a set of candidate locations to ensure both sensing and communication coverage throughout the corridor. In particular, we leverage the channel knowledge map (CKM) to characterize wireless channels for candidate BS sites prior to deployment, thereby facilitating the offline planning. Under this setup, we minimize the system cost in terms of the weighted sum of the air corridor length and the number of deployed BSs, subject to the constraints on both sensing and communication performance across the corridor. To solve the formulated large-scale nonconvex integer programming problem, we develop a hierarchical coarse-to-fine grid decomposition algorithm. Simulation results demonstrate the benefit of the proposed joint design in reducing the overall deployment cost while ensuring the coverage of the low-altitude ISAC networks.","PeriodicalId":13343,"journal":{"name":"IEEE Wireless Communications Letters","volume":"15 ","pages":"975-979"},"PeriodicalIF":5.5,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145717783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-10DOI: 10.1109/LWC.2025.3642606
Wei Jiang;Hans Dieter Schotten
This letter proposes an analytical model to study analyzes the effects of power amplifiers (PAs) on the downlink of cell-free massive MIMO systems. We model signal transmission incorporating nonlinear PA distortion and derive a unified spectral efficiency (SE) expression applicable to arbitrary precoding schemes. To combat PA-induced performance loss, a tractable joint optimization approach, as well as its low-complexity alternative, for user-centric clustering and max-min power control is proposed based on a conservative approximation.
{"title":"Nonlinear Power Amplifier-Resilient Cell-Free Massive MIMO: A Joint Optimization Approach","authors":"Wei Jiang;Hans Dieter Schotten","doi":"10.1109/LWC.2025.3642606","DOIUrl":"10.1109/LWC.2025.3642606","url":null,"abstract":"This letter proposes an analytical model to study analyzes the effects of power amplifiers (PAs) on the downlink of cell-free massive MIMO systems. We model signal transmission incorporating nonlinear PA distortion and derive a unified spectral efficiency (SE) expression applicable to arbitrary precoding schemes. To combat PA-induced performance loss, a tractable joint optimization approach, as well as its low-complexity alternative, for user-centric clustering and max-min power control is proposed based on a conservative approximation.","PeriodicalId":13343,"journal":{"name":"IEEE Wireless Communications Letters","volume":"15 ","pages":"925-929"},"PeriodicalIF":5.5,"publicationDate":"2025-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145718358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-09DOI: 10.1109/lwc.2025.3642003
Zijing Zou, Gaojie Chen, Jing Zhu, Tat-Ming Lok
{"title":"Analysis of Age of Correlated Information for NOMA Finite Blocklength Transmission","authors":"Zijing Zou, Gaojie Chen, Jing Zhu, Tat-Ming Lok","doi":"10.1109/lwc.2025.3642003","DOIUrl":"https://doi.org/10.1109/lwc.2025.3642003","url":null,"abstract":"","PeriodicalId":13343,"journal":{"name":"IEEE Wireless Communications Letters","volume":"2 1","pages":""},"PeriodicalIF":6.3,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145717784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-09DOI: 10.1109/LWC.2025.3642143
Thai-Hoc Vu;Tien-Tung Nguyen;Tan N. Nguyen;Lam-Thanh Tu;Miroslav Voznak
This letter studies the performance enhancement of symbiotic systems, which begins by formulating a closed-form adaptive mutualism symbiotic strategy for the backscatter coefficient to achieve minimal decoding errors for both primary and secondary signals. Then, we analyze two scenarios: First, the primary source adapts the modulation scheme based on the channel conditions of the primary signal to meet the target bit error rate (BER), evaluating metrics: mode selection probability, outage mode probability (OMP), BER, and spectral efficiency. Second, the primary source adapts its transmission rate and/or power according to three channel policies: constant power with optimal rate adaptation, optimal simultaneous power and rate adaptation, and truncated channel inversion with a fixed rate. Results show that for the first scenario, our proposed approach significantly improves the OMP and BER of the adaptive symbiotic system in the moderate and high signal-to-noise ratio (SNR) regimes compared to the fixed one, while the second scenario shows a promising choice for balancing capacity between backscatter and cellular rates in the low SNR regime.
{"title":"Symbiotic Communication Systems in the Internet of Things: A Framework for Double Adaptive Performance Analysis","authors":"Thai-Hoc Vu;Tien-Tung Nguyen;Tan N. Nguyen;Lam-Thanh Tu;Miroslav Voznak","doi":"10.1109/LWC.2025.3642143","DOIUrl":"10.1109/LWC.2025.3642143","url":null,"abstract":"This letter studies the performance enhancement of symbiotic systems, which begins by formulating a closed-form adaptive mutualism symbiotic strategy for the backscatter coefficient to achieve minimal decoding errors for both primary and secondary signals. Then, we analyze two scenarios: First, the primary source adapts the modulation scheme based on the channel conditions of the primary signal to meet the target bit error rate (BER), evaluating metrics: mode selection probability, outage mode probability (OMP), BER, and spectral efficiency. Second, the primary source adapts its transmission rate and/or power according to three channel policies: constant power with optimal rate adaptation, optimal simultaneous power and rate adaptation, and truncated channel inversion with a fixed rate. Results show that for the first scenario, our proposed approach significantly improves the OMP and BER of the adaptive symbiotic system in the moderate and high signal-to-noise ratio (SNR) regimes compared to the fixed one, while the second scenario shows a promising choice for balancing capacity between backscatter and cellular rates in the low SNR regime.","PeriodicalId":13343,"journal":{"name":"IEEE Wireless Communications Letters","volume":"15 ","pages":"905-909"},"PeriodicalIF":5.5,"publicationDate":"2025-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145717786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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