2018 IEEE Globecom Workshops (GC Wkshps)最新文献

LBT Switching Procedures for New Radio-Based Access to Unlicensed Spectrum 无牌频谱新无线电接入的LBT交换程序

2018 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2018-12-01 DOI: 10.1109/GLOCOMW.2018.8644176

S. Lagén, L. Giupponi, Natale Patriciello

{"title":"LBT Switching Procedures for New Radio-Based Access to Unlicensed Spectrum","authors":"S. Lagén, L. Giupponi, Natale Patriciello","doi":"10.1109/GLOCOMW.2018.8644176","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644176","url":null,"abstract":"Two channel access procedures are being considered for New Radio-based access to unlicensed spectrum (NR-U) in millimeter-wave (mmWave) bands: omnidirectional Listen-Before-Talk (omniLBT) and directional LBT (dirLBT), which differ on the type of physical carrier sense. Under beam-based transmissions, omniLBT is overprotective and reduces spatial reuse due to exposed node situations, while dirLBT enables spatial reuse, but may create hidden node problems. To address the omniLBT-dirLBT trade-off, this paper proposes LBT switching procedures to dynamically adapt the type of physical carrier sense for LBT in NR-U devices. Switching from dirLBT to omniLBT can be implemented by exploiting already available control messages in NR. Differently, to switch from omniLBT to dirLBT, no information in NR specifications is still available at the time of writing. We define new procedures to measure the overprotection level of spatial reuse provided by omniLBT, and send the switching indication accordingly. Results demonstrate the effectiveness of LBT switching, which enables an independent and dynamic adaptation according to the density and activity of neighboring nodes.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115103014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Energy-Efficient and QoS-Aware Multi-Path Geographic Routing Protocol for WMSN WMSN中节能且支持qos的多路径地理路由协议

2018 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2018-12-01 DOI: 10.1109/GLOCOMW.2018.8644166

Fida'a Al-Quran, A. Alma'aitah, M. Mowafi, E. Taqieddin

引用次数: 4

Effect of Frequency Offset on Cooperative Jamming Cancellation in Physical Layer Security 频率偏移对物理层安全协同干扰消除的影响

2018 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2018-12-01 DOI: 10.1109/GLOCOMW.2018.8644513

Wenbo Guo, Hongzhi Zhao, Wanzhi Ma, Chenxing Li, Zeyan Lu, Youxi Tang

{"title":"Effect of Frequency Offset on Cooperative Jamming Cancellation in Physical Layer Security","authors":"Wenbo Guo, Hongzhi Zhao, Wanzhi Ma, Chenxing Li, Zeyan Lu, Youxi Tang","doi":"10.1109/GLOCOMW.2018.8644513","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644513","url":null,"abstract":"In the presence of some eavesdroppers, cooperative jamming cancellation (CJC) plays a significant role in physical layer security for wireless communications. The assumption that the cooperative jamming is cancelled ideally with perfect frequency and timing synchronization is commonly used in the past literatures. Due to the instability of crystal oscillators and the relative motion between the cooperative node and the receiving node, residual frequency offset always exists between these two nodes, resulting in performance degradation during CJC. In this paper, a scenario in which all nodes equipped with single antenna is considered. To explicitly analyze the effect of frequency offset on CJC, we model frequency offset as an inter-frequency interference (IFI) in the frequency domain, and evaluate the CJC performance by jamming cancellation ratio (JCR), which is derived as the closed-form expression. Theoretical and simulation results show that, for the additive white Gaussian noise (AWGN) channel, when the ideal received jamming-to-noise ratio (JNR) is 60dB, the jamming bandwidth is 10MHz, and the sampling period of analog-digital converter (ADC) is 100ns, the maximum tolerable frequency offsets that incur 0.1dB, 1dB, and 3dB JCR degradation are 0.82Hz, 2.74Hz, and 5.37Hz, respectively.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117213341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Impact of Platoon Size on the Performance of TDMA-Based MAC Protocols 队列大小对基于tdma的MAC协议性能的影响

2018 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2018-12-01 DOI: 10.1109/GLOCOMW.2018.8644433

Aqsa Aslam, L. Almeida, Frederico Santos

引用次数: 4

Angular Spread Quantification of Multi-Antenna Vehicular Radio Communication Channels 多天线车载无线电通信信道的角扩展量化

2018 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2018-12-01 DOI: 10.1109/GLOCOMW.2018.8644469

Abrar Ahmed, S. Nawaz, Sardar Muhammad Gulfam, Shurjeel Wyne, M. Patwary, H. Pervaiz

{"title":"Angular Spread Quantification of Multi-Antenna Vehicular Radio Communication Channels","authors":"Abrar Ahmed, S. Nawaz, Sardar Muhammad Gulfam, Shurjeel Wyne, M. Patwary, H. Pervaiz","doi":"10.1109/GLOCOMW.2018.8644469","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644469","url":null,"abstract":"The deployment of multi-antenna systems with software defined reconfigurable beam patterns can potentially benefit vehicle-to-vehicle (V2V) communications by increasing the channel coherence time. This in turn necessitates an accurate characterization and modeling of the angular statistics of vehicular radio propagation environments. This work proposes an improved three-dimensional (3-D) spatial description of vehicular propagation environments and derives the closed-form analytical expressions for the joint and marginal statistics of the 3-D angle-of-arrival (AoA) and angle-of-departure (AoD). Then, based on the proposed geometric channel model, the AoA and AoD angular spreads are quantified in terms of the joint angular spread, elevational constriction, and the azimuthal constriction. These considered quantifiers are shown to be of high significance in quantification of angular spread in V2V radio propagation environments. The impact of various physical parameters on the angular spread is also investigated. These parameters include the link-distance, scattering volume, and the number of scatterers along the azimuth and elevation axes. The derived analytical expressions are also validated by simulations.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126031231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Impact of Device Population on Beam Alignment Performance of 802.11ad 设备数量对802.11ad波束对准性能的影响

2018 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2018-12-01 DOI: 10.1109/GLOCOMW.2018.8644419

Marjan Moradi, Kanchana Thilakarathna, Ming Ding, Mahbub Hassan

引用次数: 4

Design and Implementation of a Practical Quantum Secure Direct Communication System 一种实用量子安全直接通信系统的设计与实现

2018 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2018-12-01 DOI: 10.1109/GLOCOMW.2018.8644424

Zhen Sun, Ruoyang Qi, Zaisheng Lin, L. Yin, Guilu Long, Jianhua Lu

引用次数: 19

SS/PBCH Block Design in 5G New Radio (NR) 5G新无线电(NR)中的SS/PBCH分组设计

2018 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2018-12-01 DOI: 10.1109/GLOCOMW.2018.8644466

Zhipeng Lin, Jingya Li, Yanli Zheng, N. V. Irukulapati, Hai Wang, H. Sahlin

引用次数: 12

Comparison of OFDM and Single-Carrier Transmission for Ultra-Low Delay Applications OFDM和单载波传输在超低延迟应用中的比较

2018 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2018-12-01 DOI: 10.1109/GLOCOMW.2018.8644382

C. Rachinger, J. Huber, W. Gerstacker

引用次数: 0

A Novel Optimal Precoder and Equalizer in $2times 2$ MIMO VLC Systems for Vehicular Application 车载2 × 2 MIMO VLC系统中一种新颖的最优预编码器和均衡器

2018 IEEE Globecom Workshops (GC Wkshps) Pub Date : 2018-12-01 DOI: 10.1109/GLOCOMW.2018.8644211

Hasan Farahneh, Fatima Hussain, Rasheed Hussain, Xavier N Fernando

{"title":"A Novel Optimal Precoder and Equalizer in $2times 2$ MIMO VLC Systems for Vehicular Application","authors":"Hasan Farahneh, Fatima Hussain, Rasheed Hussain, Xavier N Fernando","doi":"10.1109/GLOCOMW.2018.8644211","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2018.8644211","url":null,"abstract":"Precoding is a technique which exploits transmission diversity by weighting the information stream, i.e. the transmitter sends the coded information to the receiver to achieve pre-knowledge of the channel. Visible light communication (VLC) channels inherently exhibit frequency-selective and multi-path fading effects that result in intersymbol interference (ISI) and thus reduces the data rate. To this end, optical multiple input multiple output (MIMO) can provide spatial diversity and thus achieve a high data rate. Inspired by these facts, we investigate different precoding and equalization schemes for $2 times 2$ MIMO for the vehicle to vehicle (V2V-VLC) system. In this work, we consider three detection schemes, Zero Forcing (ZF), Maximum likelihood (ML), and Minimum Mean Squared Error (MMSE). Also, we consider flickering/dimming control and the nature of outdoor VLC channel as a frequency selective channel. Moreover, we investigate a transceiver considering perfect CSI based on different detection algorithms. Simulation results of the investigated transceiver demonstrate improvements in Bit Error Rate (BER) and Mean Squared Error (MSE) for the MMSE scheme.","PeriodicalId":348924,"journal":{"name":"2018 IEEE Globecom Workshops (GC Wkshps)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114447283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4