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Topology Optimization for UAV Swarm Communication With Jamming 具有干扰的无人机群通信拓扑优化
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-03-07 DOI: 10.1109/LCOMM.2025.3549253
Haitao Li;Haichao Wang;Xueqiang Zheng;Jiangchun Gu;Xinrong Guan;Haibo Liu
{"title":"Topology Optimization for UAV Swarm Communication With Jamming","authors":"Haitao Li;Haichao Wang;Xueqiang Zheng;Jiangchun Gu;Xinrong Guan;Haibo Liu","doi":"10.1109/LCOMM.2025.3549253","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3549253","url":null,"abstract":"Unmanned aerial vehicles (UAVs) have been demonstrated immense potentials to enhance communication systems tailored to the unique characteristics by optimizing the placement and mobility. However, most of the studies focus on UAV-enabled wireless communications such as aerial base stations and relays. The UAV swarm communication is also an important scenario but challenging due to the limited spectrum resources and serious interference among UAV swarms. This letter proposes a topology optimization method for UAV swarm communication, where each UAV transmits data to a collection center directly or via other UAVs while considering malicious jamming. The proposed method jointly designs the information transmission path of all UAVs and transmission power to simultaneously maximize the minimum communication network capacity among all UAVs. A power control algorithm is also proposed to derive the network capacity under a given information transmission path. Simulation results indicate that the proposed topology optimization method increases network capacity compared with other benchmark algorithms.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 5","pages":"983-987"},"PeriodicalIF":3.7,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929863","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}
引用次数: 0
Ternary Message Passing Decoding of High-Rate Regular LDPC Codes 高速率规则LDPC码的三元报文传递译码
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-03-05 DOI: 10.1109/LCOMM.2025.3548305
Qiushi Xu;Ming Jiang;Fan Ding;Yi Wang
{"title":"Ternary Message Passing Decoding of High-Rate Regular LDPC Codes","authors":"Qiushi Xu;Ming Jiang;Fan Ding;Yi Wang","doi":"10.1109/LCOMM.2025.3548305","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3548305","url":null,"abstract":"In this letter, we present an improved ternary message passing (TMP) decoding scheme designed for the high-rate regular low-density parity-check (LDPC) codes, which are widely used in storage systems. The decoders in this approach transmit information internally by only three states, and compared to traditional normalized min-sum decoding, it retains only sign multiplication operations, resulting in lower complexity. Meanwhile, we propose a method for optimizing decoder parameters using the density evolution (DE) analysis, which allows the TMP decoders to achieve performance close to that of the belief propagation decoders. Furthermore, in the case of hard decision inputs, we introduce a quantized DE analysis to optimize and compute decoder parameters, enabling the TMP decoders to even outperform the normalized min-sum decoders.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 5","pages":"968-972"},"PeriodicalIF":3.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929858","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}
引用次数: 0
Rethinking Power Minimization in a Downlink Hybrid NOMA Network 对下行混合NOMA网络功率最小化的再思考
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-03-05 DOI: 10.1109/LCOMM.2025.3548041
Ximing Xie;Fang Fang;Xianbin Wang
{"title":"Rethinking Power Minimization in a Downlink Hybrid NOMA Network","authors":"Ximing Xie;Fang Fang;Xianbin Wang","doi":"10.1109/LCOMM.2025.3548041","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3548041","url":null,"abstract":"This letter investigates the problem of minimizing total transmission power in a downlink multi-user hybrid non-orthogonal multiple access (H-NOMA) network. The system consists of an access point (AP) equipped with multiple antennas serving multiple single-antenna users, divided into clusters. A closed-form beamforming solution is derived to achieve near optimal performance for the case where each cluster contains two users. The proposed solution significantly reduces reducing computational complexity compared to existing semidefinite programming (SDP) approaches. Based on the derived beamforming solution, an efficient grouping strategy is proposed to determine the optimal clustering plan for users. Simulation results show that the proposed approach outperforms conventional methods, such as orthogonal multiple access (OMA), zero-forcing (ZF), and other clustering benchmarks. It also has competitive performance compared to dirty paper coding (DPC), in terms of total transmission power reduction.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 5","pages":"953-957"},"PeriodicalIF":3.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929755","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}
引用次数: 0
Generic Constraint-Free Design of Sparse MIMO System for Enhanced Localization of Targets 增强目标定位的稀疏MIMO系统的通用无约束设计
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-03-05 DOI: 10.1109/LCOMM.2025.3548083
Abdul Hayee Shaikh;Xiaoguang Liu
{"title":"Generic Constraint-Free Design of Sparse MIMO System for Enhanced Localization of Targets","authors":"Abdul Hayee Shaikh;Xiaoguang Liu","doi":"10.1109/LCOMM.2025.3548083","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3548083","url":null,"abstract":"Recently, the multiple input multiple output (MIMO) system uses sparse arrays to generate a long co-array with higher degrees of freedom (DOFs) for direction of arrival (DOA) estimation. However, most of the existing sparse MIMO have design limitations, lack a generic approach, and generate many holes in co-array, especially with coprime sparse arrays. To this end, we propose a ubiquitous MIMO (U-MIMO) system, which employs a new supplementary tri-level (STiL) receiver (Rx) and a transmitter (Tx) of increased inter-element spacing. The STiL scheme can be designed for any number of Rxs and applies to different sensor arrays. The inter-element spacing of the proposed Tx is increased by the total number of virtual lags in the difference co-array of STiL Rx to produce a longer sum co-array of the difference co-array (SCDC) for the U-MIMO system. As a result, the proposed approach not only overcomes the design constraints but achieves higher DOFs with no or minimum number of holes in SCDC, even when coprime arrays are used. The closed-form expressions are provided for precise sensor locations and calculating the DOFs. Simulation results validate the effectiveness of the U-MIMO system using different sensor arrays.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 5","pages":"963-967"},"PeriodicalIF":3.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929753","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}
引用次数: 0
On Maximal Achievable Rate With Finite Blocklength in Quasi-Static SIMO/MIMO Channels 准静态SIMO/MIMO信道有限块长的最大可达速率
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-03-05 DOI: 10.1109/LCOMM.2025.3548042
Wenshuo Zhang;Jiafei Fu;Yawen Zhong;Chen Ji;Pengcheng Zhu
{"title":"On Maximal Achievable Rate With Finite Blocklength in Quasi-Static SIMO/MIMO Channels","authors":"Wenshuo Zhang;Jiafei Fu;Yawen Zhong;Chen Ji;Pengcheng Zhu","doi":"10.1109/LCOMM.2025.3548042","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3548042","url":null,"abstract":"The analysis of maximal achievable rate in the finite blocklength regime provides a fundamental framework for the performance evaluation of ultra-reliable low latency communications (URLLC). This letter investigates the maximal achievable rate of multiple-antenna systems in quasi-static fading channels with finite blocklength, specifically focusing on massive uncorrelated antenna arrays and low latency scenarios. We first characterize the statistical properties of channel capacity and channel dispersion, and then derive analytical results for the maximal achievable rate. Simulation and numerical results demonstrate that the derived analytical expressions accurately characterize the performance bound of the maximal achievable rate with finite blocklength.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 5","pages":"958-962"},"PeriodicalIF":3.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929713","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}
引用次数: 0
A Novel Impedance Domain Non-Orthogonal Multiple Access 一种新的阻抗域非正交多址
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-03-05 DOI: 10.1109/LCOMM.2025.3548599
Man Hee Lee;Hye Yeong Lee;Soo Young Shin
{"title":"A Novel Impedance Domain Non-Orthogonal Multiple Access","authors":"Man Hee Lee;Hye Yeong Lee;Soo Young Shin","doi":"10.1109/LCOMM.2025.3548599","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3548599","url":null,"abstract":"This letter proposes a novel impedance domain non-orthogonal multiple access (ID-NOMA) to overcome problems on conventional power domain NOMA (PD-NOMA). The proposed ID-NOMA integrates impedance-matching circuits (IMCs) with impedance based power attenuation reinforcement (I-PAR). The IMC values are derived from source and load IMCs while I-PAR attenuates user’ signals by using I-PAR coefficients. The numerical results show that the proposed ID-NOMA outperforms PD-NOMA in terms of ergodic capacity (EC) and outage probability (OP) owing to the effectiveness of I-PAR.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 5","pages":"973-977"},"PeriodicalIF":3.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929855","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}
引用次数: 0
Global Satellite Navigation Distributed Synchronous Spoofing Monitoring Method Based on Spatial Cross-Correlation Spectrum 基于空间互相关谱的全球卫星导航分布式同步欺骗监测方法
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-03-05 DOI: 10.1109/LCOMM.2025.3545122
Chun Wang;Yan Huang;Yuxuan Huang;Kou Yanhong
{"title":"Global Satellite Navigation Distributed Synchronous Spoofing Monitoring Method Based on Spatial Cross-Correlation Spectrum","authors":"Chun Wang;Yan Huang;Yuxuan Huang;Kou Yanhong","doi":"10.1109/LCOMM.2025.3545122","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3545122","url":null,"abstract":"A novel distributed global satellite navigation synchronous spoofer, which is deployed as a pseudo-satellite constellation, sends several synchronous spoofing signals from different directions of arrival (DOAs). In this letter, we propose a synchronous spoofing monitoring method based on a spatial cross-correlation spectrum. The power and corresponding DOA measurements of those correlated sources are extracted by searching for the peak of the proposed cross-correlation spectrum. Experimental results demonstrate that the proposed method enables the simultaneous estimation of three essential features, such as DOAs, received power levels, and cross-correlations among different navigation signals, and effectively detects the synchronous spoofing signal at the moment when the monitoring correlation coefficients reach the maximum of 1.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 5","pages":"903-907"},"PeriodicalIF":3.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929754","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}
引用次数: 0
Analysis of Polarization Characteristics in Outdoor-to-Indoor Wireless Channels for High-Speed Trains 高速列车室内外无线信道极化特性分析
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-03-04 DOI: 10.1109/LCOMM.2025.3547905
Yichen Feng;Rui Wang;Xiaoyong Wang;Lixu He;Wei Xiang;Asad Saleem;Guoxin Zheng
{"title":"Analysis of Polarization Characteristics in Outdoor-to-Indoor Wireless Channels for High-Speed Trains","authors":"Yichen Feng;Rui Wang;Xiaoyong Wang;Lixu He;Wei Xiang;Asad Saleem;Guoxin Zheng","doi":"10.1109/LCOMM.2025.3547905","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3547905","url":null,"abstract":"To effectively deploy 5G network base stations (BSs) in railway communication systems and ensure reliable communication between train terminals and BSs, it is essential to study the outdoor-to-indoor (O2I) wireless channel characteristics in high-speed trains (HSTs). This letter utilizes data from the 2.6 GHz HST measurement campaign to calibrate and validate the ray-tracing simulation model for the specified scenario by identifying key parameters, such as the relative permittivity (6.27) and conductivity (0.54) of the HST glass windows. Using this calibrated model, we analyze the channel fading characteristics under various polarization modes. The results indicate that, under the horizontal co-polarized (H-H) mode, the path loss (PL), root-mean-square delay spread (RMS-DS), and angular spread (AS) are all lower compared to other polarization modes. These findings are intended to provide a reference for the future deployment of 5G base stations in HST environments.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 5","pages":"948-952"},"PeriodicalIF":3.7,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929813","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}
引用次数: 0
TRHyper: Low-Complexity Hypernetwork for Channel Neural Decoding With Learning Weights in Tensor Ring Format TRHyper：基于张量环格式的学习权信道神经解码的低复杂度超网络
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-03-03 DOI: 10.1109/LCOMM.2025.3546260
Yuanhui Liang;Chan-Tong Lam;Qingle Wu;Benjamin K. Ng;Sio-Kei Im
{"title":"TRHyper: Low-Complexity Hypernetwork for Channel Neural Decoding With Learning Weights in Tensor Ring Format","authors":"Yuanhui Liang;Chan-Tong Lam;Qingle Wu;Benjamin K. Ng;Sio-Kei Im","doi":"10.1109/LCOMM.2025.3546260","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3546260","url":null,"abstract":"In this letter, we propose a low-complexity hypernetwork for channel neural decoding with learning weights in tensor ring (TR) format, called TRHyper. The internal parameters and the number of layers of the TRHyper based channel neural decoding algorithm can be updated without retraining. We design the size of each TRHyper layer according to the size of the factor tensor in tensor ring format. During the training phase, we reuse the storage space for the learning weights of the main decoding network, so the proposed TRHyper no longer require additional storage space for its learning weights. Numerical results show that for low-density parity check (LDPC) codes, the performance of the TRHyper based channel neural decoder is similar to that of the original decoder, while for Bose-Chaudhuri-Hocquenghem (BCH) codes, the performance slightly exceeds the original decoder.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 5","pages":"918-922"},"PeriodicalIF":3.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929793","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}
引用次数: 0
Theoretical and Practical Evaluation of LoRa-Based Ranging Toward Accurate TDoA-Based LoRa Localization 基于LoRa测距的tdoa精确定位的理论与实践评价
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-03-03 DOI: 10.1109/LCOMM.2025.3547036
Salma Elsherif;Karim Tarek;Phoebe Edward;Tallal Elshabrawy
{"title":"Theoretical and Practical Evaluation of LoRa-Based Ranging Toward Accurate TDoA-Based LoRa Localization","authors":"Salma Elsherif;Karim Tarek;Phoebe Edward;Tallal Elshabrawy","doi":"10.1109/LCOMM.2025.3547036","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3547036","url":null,"abstract":"Conventional Internet of Things (IoT) technologies such as RFID, Bluetooth, and Wi-Fi exhibit compromise between energy-efficiency and communication range. Long Range (LoRa) technology is pillared on guaranteeing battery lifetimes for up to ten years while promising reliable communication at the scale of ten kilometers. Such capabilities exhibit an exclusive potential of LoRa to proliferate a vast set of localization-based IoT use cases. This letter evaluates the theoretical and practical capabilities of LoRa-based distance ranging which is a fundamental constituent of Time Difference of Arrival (TDoA)-based localization. The letter first derives the theoretical Cramer-Rao Lower Bound (CRLB) for ranging of LoRa signals. A simulation model is then developed that incorporates practical reception aspects such as frequency offset estimation errors. The distance errors attained from simulations are compared against the theoretical bounds and the impact of frequency offsets is evaluated. Furthermore, an experimental Software Defined Radio (SDR) setup is devised for practical evaluation of distance ranging over a span of Signal-to-Noise Ratio (SNR) values.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 5","pages":"923-927"},"PeriodicalIF":3.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929862","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}
引用次数: 0
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