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Ambient Backscatter Communications With Multi-Tag Selection: Outage Performance Analysis 环境反向散射通信与多标签选择：中断性能分析
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2024-10-10 DOI: 10.1109/LCOMM.2024.3477726
Suneel Yadav;Radhika Gour;Devendra S. Gurjar;Manav Bhatnagar
{"title":"Ambient Backscatter Communications With Multi-Tag Selection: Outage Performance Analysis","authors":"Suneel Yadav;Radhika Gour;Devendra S. Gurjar;Manav Bhatnagar","doi":"10.1109/LCOMM.2024.3477726","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3477726","url":null,"abstract":"This letter investigates the outage performance of a multi-tag ambient backscatter communication system over Nakagami-m fading channels. Considering the presence or absence of successive interference cancellation (SIC) techniques at the reader, namely, SIC-enabled or SIC-disabled, respectively, we first formulate the multi-tag selection schemes where the best tag is selected to communicate with the reader. We then present the distributions of the magnitude of the end-to-end channel coefficients for SIC-enabled/SIC-disabled based tag selection schemes over Nakagami-m fading. With these findings, we evaluate the novel outage probability expressions for both schemes. We also reveal some key insights related to the system’s diversity gain. Numerical and simulation results verify the accuracy of our analytical findings, and demonstrate the impact of various system and channel parameters on the outage performance.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"28 12","pages":"2884-2888"},"PeriodicalIF":3.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810317","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
Experimental Demonstration of Mahalanobis Distance Correlation Acquisition for OWC Spread Spectrum Communication Systems OWC扩频通信系统Mahalanobis距离相关采集的实验验证
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2024-10-10 DOI: 10.1109/LCOMM.2024.3477560
Kaiwen Zheng;Jiale Wang;Benben Li;Jie Lian;Dianbin Lian;Yan Gao;Guolei Zhu
{"title":"Experimental Demonstration of Mahalanobis Distance Correlation Acquisition for OWC Spread Spectrum Communication Systems","authors":"Kaiwen Zheng;Jiale Wang;Benben Li;Jie Lian;Dianbin Lian;Yan Gao;Guolei Zhu","doi":"10.1109/LCOMM.2024.3477560","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3477560","url":null,"abstract":"Optical wireless communication spread spectrum systems are known for their robustness and ability to resist interference. However, they can be impacted by non-Gaussian noise, leading to challenges such as clock synchronization failures and increased false alarm rates. To tackle this issue, this study transitions from examining signal correlation values to focusing on their distribution characteristics. The approach involves utilizing an adaptive Gaussian mixture model to establish the distribution of background noise correlation values and employing the weighted Mahalanobis distance for effectively differentiating the spread spectrum signal. Through experiments conducted at a signal-to-noise ratio (SNR) of -15 dB, the proposed algorithm demonstrates a significant enhancement in signal detection accuracy, surpassing 58%.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"28 12","pages":"2804-2808"},"PeriodicalIF":3.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810498","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
IEEE Communications Society Information IEEE 通信学会信息
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2024-10-10 DOI: 10.1109/LCOMM.2024.3464153
{"title":"IEEE Communications Society Information","authors":"","doi":"10.1109/LCOMM.2024.3464153","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3464153","url":null,"abstract":"","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"28 10","pages":"C3-C3"},"PeriodicalIF":3.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10713467","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
IEEE Communications Letters Publication Information IEEE Communications Letters 出版信息
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2024-10-10 DOI: 10.1109/LCOMM.2024.3464149
{"title":"IEEE Communications Letters Publication Information","authors":"","doi":"10.1109/LCOMM.2024.3464149","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3464149","url":null,"abstract":"","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"28 10","pages":"C2-C2"},"PeriodicalIF":3.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10713451","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142408919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimal Elevation and Azimuth Rotation for RIS-Assisted Wireless Transmission ris辅助无线传输的最佳仰角和方位旋转
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2024-10-10 DOI: 10.1109/LCOMM.2024.3477957
Shuqing Xu;Haiyan Guo;Wen Dong;Bin Lyu
{"title":"Optimal Elevation and Azimuth Rotation for RIS-Assisted Wireless Transmission","authors":"Shuqing Xu;Haiyan Guo;Wen Dong;Bin Lyu","doi":"10.1109/LCOMM.2024.3477957","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3477957","url":null,"abstract":"In this letter, we propose to optimize the rotation of reconfigurable intelligent surface (RIS) in both elevation and azimuth dimensions for further improving the RIS-assisted wireless transmission performance. Considering a mobile multi-user scenario, we first derive the upper bound of the ergodic sum-rate and the normalized radiation intensity of RIS after rotation in both elevation and azimuth dimensions. On this basis, we formulate the optimization problem with respect to the two rotation angles for the sake of maximizing the cascaded path gain, and derive the optimal solutions in closed form. Furthermore, we extend the optimal two-dimensional rotation (2DR) scheme to the scenario where multi-hop RISs assist wireless communication. Our simulation results verify the correctness of our derivation and show that our proposed 2DR scheme leads to a significantly higher ergodic sum-rate as compared to the single-elevation rotation (SER) scheme and no rotation (NR) scheme.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"28 12","pages":"2909-2913"},"PeriodicalIF":3.7,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810378","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
Joint Energy and SINR Coverage Probability in UAV Corridor-Assisted RF-Powered IoT Networks 无人机走廊辅助射频驱动物联网网络联合能量和信噪比覆盖概率
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2024-10-09 DOI: 10.1109/LCOMM.2024.3476936
Harris K. Armeniakos;Petros S. Bithas;Konstantinos Maliatsos;Athanasios G. Kanatas
{"title":"Joint Energy and SINR Coverage Probability in UAV Corridor-Assisted RF-Powered IoT Networks","authors":"Harris K. Armeniakos;Petros S. Bithas;Konstantinos Maliatsos;Athanasios G. Kanatas","doi":"10.1109/LCOMM.2024.3476936","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3476936","url":null,"abstract":"This letter studies the joint energy and signal-to-interference-plus-noise (SINR)-based coverage probability in Unmanned Aerial Vehicle (UAV)-assisted radio frequency (RF)-powered Internet of Things (IoT) networks. The UAVs are spatially distributed in an aerial corridor that is modeled as a one-dimensional (1D) binomial point process (BPP). By accurately capturing the line-of-sight (LoS) probability of a UAV through large-scale fading: i) an exact form expression for the energy coverage probability is derived and ii) a tight approximation for the overall coverage performance is obtained. Among several key findings, numerical results reveal the optimal number of deployed UAV-BSs that maximizes the joint coverage probability, as well as the optimal length of the UAV corridors when designing such UAV-assisted IoT networks.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"28 12","pages":"2904-2908"},"PeriodicalIF":3.7,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810377","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
Reduced Guard Interval Orthogonal Frequency Division Multiplexing: A Soft Trade-Off Solution Toward Spectral Efficiency 减小保护间隔正交频分复用：频谱效率的软权衡解决方案
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2024-10-09 DOI: 10.1109/LCOMM.2024.3476486
Zhaoqi Wang;Ran Xu;Shihao Wu;Xiqing Liu;Mugen Peng
{"title":"Reduced Guard Interval Orthogonal Frequency Division Multiplexing: A Soft Trade-Off Solution Toward Spectral Efficiency","authors":"Zhaoqi Wang;Ran Xu;Shihao Wu;Xiqing Liu;Mugen Peng","doi":"10.1109/LCOMM.2024.3476486","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3476486","url":null,"abstract":"The guard interval, termed as cyclic prefix (CP) or zero-padding (ZP), is utilized to mitigate multipath interference in orthogonal frequency division multiplexing (OFDM) systems but at the expense of spectral efficiency. Symbol cyclic shift equalization (SCSE) is our previous proposal to address multipath propagation in CP-free OFDM systems. However, SCSE-OFDM exhibits poor bit error rate (BER) performance when the power of the shortest resolvable path is relatively low. In light of this, we carry out a reduced guard interval (RGI) OFDM scheme that achieves a soft trade-off between SCSE-OFDM and ZP-OFDM, where RGI length can be optimized using genetic algorithm. Simulation results demonstrate superior BER performance of RGI-OFDM over SCSE-OFDM and higher spectral efficiency compared to both SCSE-OFDM and ZP-OFDM. RGI-OFDM also exhibits evident advantages in harsh environments with large delay spread.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"28 12","pages":"2920-2924"},"PeriodicalIF":3.7,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810423","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
RIS-Aided XL-MIMO Channel Estimation Based on Expectation-Maximization 基于期望最大化的ris辅助xml - mimo信道估计
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2024-10-08 DOI: 10.1109/LCOMM.2024.3476348
Xiao Zhang;Hua Shao;Wenyu Zhang;Zhiwei Xie;Xianze Yang;Wenpeng Jing
{"title":"RIS-Aided XL-MIMO Channel Estimation Based on Expectation-Maximization","authors":"Xiao Zhang;Hua Shao;Wenyu Zhang;Zhiwei Xie;Xianze Yang;Wenpeng Jing","doi":"10.1109/LCOMM.2024.3476348","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3476348","url":null,"abstract":"Intelligent reflecting surface (RIS)-aided extremely large-scale massive MIMO (XL-MIMO) is a promising technique for improving the spectrum efficiency in future 6G communications. However, channel estimation for the RIS-aided XL-MIMO system still faces challenges such as overhead and accuracy due to its large dimensionality. In this letter, an expectation-maximization (EM)-based channel estimation is proposed for the RIS-aided XL-MIMO system. By utilizing the properties of the polar-domain near-field channel and angular-domain far-field channel, the original hybrid-field channel is transformed into a common sparse structure to reduce computational complexity, in which the parameters are further modeled as an unknown Bernoulli-Gaussian (BG) distribution. The hybrid-field channel is estimated by iteratively updating the parameters. Simulations are performed and results demonstrate that the proposed EM-based method achieves better performance with the same pilot overhead.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"28 12","pages":"2869-2873"},"PeriodicalIF":3.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810424","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 Generalized STAR-RIS-Empowered Ambient Backscatter Short-Packet Communication Systems With Partial NOMA 一种具有部分NOMA的广义star - ris赋能环境反向散射短包通信系统
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2024-10-07 DOI: 10.1109/LCOMM.2024.3475569
Tien-Hoa Nguyen;Thai-Hoc Vu
{"title":"A Generalized STAR-RIS-Empowered Ambient Backscatter Short-Packet Communication Systems With Partial NOMA","authors":"Tien-Hoa Nguyen;Thai-Hoc Vu","doi":"10.1109/LCOMM.2024.3475569","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3475569","url":null,"abstract":"This letter proposes a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS)-empowered ambient backscatter short-packet paradigm with partial non-orthogonal multiple access (p-NOMA). In this paradigm, a multi-antenna base station communicates with users using finite blocklength schemes to achieve low latency transmission while flexibly exploiting the spectrum utilization via p-NOMA. Considering Nakagami–m fading channels, discrete phase-shift alignment, and imperfect successive interference cancellation, we provide a generalized information-theoretic framework that characterizes passive, active, and hybrid STAR-RIS types, to measure the block-error rate (BLER) and goodput. To gain useful insights into system designs, an upper-bound BLER at high transmit power has been derived. Numerical results demonstrate the BLER superiority of p-NOMA over its orthogonal multiple access (OMA) and NOMA counterparts, as well as the respective twofold and fourfold enhancements in terms of goodput.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"28 12","pages":"2744-2748"},"PeriodicalIF":3.7,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810483","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
Boosting Ordered Statistics Decoding of Short LDPC Codes With Simple Neural Network Models 用简单神经网络模型提高LDPC短码的有序统计解码
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2024-10-07 DOI: 10.1109/LCOMM.2024.3475874
Guangwen Li;Xiao Yu
{"title":"Boosting Ordered Statistics Decoding of Short LDPC Codes With Simple Neural Network Models","authors":"Guangwen Li;Xiao Yu","doi":"10.1109/LCOMM.2024.3475874","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3475874","url":null,"abstract":"Ordered statistics decoding has been instrumental in addressing decoding failures that persist after normalized min-sum decoding in short low-density parity-check codes. Despite its benefits, the high computational complexity of effective ordered statistics decoding has limited its application in complexity-sensitive scenarios. To mitigate this issue, we propose a novel variant of the ordered statistics decoder. This approach begins with the design of a neural network model that refines the measurement of codeword bits, utilizing iterative information from normalized min-sum decoding failures. Subsequently, a fixed decoding path is established, comprising a sequence of blocks, each featuring a variety of test error patterns. The introduction of a sliding window-assisted neural model facilitates early termination of the ordered statistics decoding process along this path, aiming to balance performance and computational complexity. Comprehensive simulations and complexity analyses demonstrate that the proposed hybrid method matches state-of-the-art approaches across various metrics, particularly excelling in reducing latency.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"28 12","pages":"2714-2718"},"PeriodicalIF":3.7,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810477","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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