2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall)最新文献_第8页

Radio Remote Head Clustering with Affinity Propagation Algorithm in C-RAN 基于亲和性传播算法的C-RAN无线远端头聚类

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891078

Seju Park, Han-Shin Jo, Cheol Mun, J. Yook

引用次数: 3

Layered-Division Multiplexing Multicell Cooperative Multicast-Broadcast Beamforming 分层多路复用多蜂窝协同多播广播波束形成

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891417

Tao Fang, Dazhi He, Yin Xu, Yijia Feng, Yiwei Zhang, Wenjun Zhang

引用次数: 0

Bit Error Rate Analysis of MRC Precoded Massive MIMO-OFDM Systems with Peak Cancellation 带峰值抵消的MRC预编码大规模MIMO-OFDM系统误码率分析

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891444

T. Kageyama, O. Muta

{"title":"Bit Error Rate Analysis of MRC Precoded Massive MIMO-OFDM Systems with Peak Cancellation","authors":"T. Kageyama, O. Muta","doi":"10.1109/VTCFall.2019.8891444","DOIUrl":"https://doi.org/10.1109/VTCFall.2019.8891444","url":null,"abstract":"In orthogonal frequency division multiplexing (OFDM) with massive multi-input multiple-output (mMIMO), the reduction of the high peak-to-average power ratio (PAPR) is a challenging problem. Recently, an adaptive peak cancellation is proposed to reduce the transmitted signalâ€™s PAPR, while keeping the out-of-band leakage power (ACLR) as well as an in-band distortion power (EVM) below the predetermined and permissible value. In this paper, we propose an analytical method to evaluate achievable BER performance of downlink OFDM with the peak cancellation in massive multi-input-multioutput (mMIMO) systems using arbitrary numbers of transmit antennas and served users. In this method, bit error rate (BER) is derived based on the assumption that in-band distortion due to peak cancellation is approximated as random variable following Gaussian distribution, provided that variance of the Gaussian distribution in two user case is known. The results clarify that theoretical BER expressions for arbitrary numbers of transmit antennas and served users show good agreements with its simulation results. In addition, we clarified the impact of the increase of the number of transmit antennas on achievable BER and PAPR reduction capability in MRC precoded mMIMOOFDM system with the peak cancellation.","PeriodicalId":6713,"journal":{"name":"2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall)","volume":"65 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81448318","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: 7

Joint Synchronization in Macro-Diversity Multi-Connectivity Networks 宏分集多连接网络中的联合同步

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891138

Nick Schwarzenberg, Friedrich Burmeister, Albrecht Wolf, Norman Franchi, G. Fettweis

{"title":"Joint Synchronization in Macro-Diversity Multi-Connectivity Networks","authors":"Nick Schwarzenberg, Friedrich Burmeister, Albrecht Wolf, Norman Franchi, G. Fettweis","doi":"10.1109/VTCFall.2019.8891138","DOIUrl":"https://doi.org/10.1109/VTCFall.2019.8891138","url":null,"abstract":"Multi-connectivity is a key enabler for realtime applications demanding high reliability such as connected vehicles. Employing macro-diversity with distributed transceivers has the advantage of mitigating large-scale losses such as shadowing, but may incur time offsets between packets, requiring the receiver to synchronize to each packet individually. Since packet detection is prerequisite for any downstream receiver processing, synchronization can become a bottleneck to achieving high reliability. In this paper, we propose a concept to improve receiver performance in macro-diversity multi-connectivity networks in case of time offsets between packets, for instance, due to loose synchronization of distributed transmitters. By buffering the inputs of parallel receiver paths and allowing for iterative synchronization, successfully detected packets can serve as extended correlation sequence to detect previously undetected packets which thereby become available to diversity combining. Taking link-level simulations of IEEE 802.11 (WLAN) as an example, we demonstrate the efficacy of such Joint Synchronization (JS) and provide first numerical results. We see an SNR gain of about 1 dB in the mid-SNR range, which is equivalent to a packet error rate reduction by an order of magnitude for four-fold diversity. With power consumption in mind, we consider the trade-off between implementation complexity and the gain of JS. We conclude that JS is a viable backwards-compatible approach to improve diversity combining of delayed packets in multi-connectivity networks.","PeriodicalId":6713,"journal":{"name":"2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall)","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81544030","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

VTC2019-Fall General Co-Chairs Welcome vtc2019 -秋季联合主席欢迎

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Pub Date : 2019-09-01 DOI: 10.1109/vtcfall.2019.8891381

引用次数: 0

Derivation of Sensing Features for Maximum Cyclic Autocorrelation Selection Based Signal Detection 基于最大循环自相关选择的信号检测传感特征的推导

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891131

S. Narieda, Daiki Cho, Hiromichi Ogasawara, K. Umebayashi, T. Fujii, H. Naruse

引用次数: 1

Accurate QoS Prediction for CSMA/CA Systems with Uncorrelated Interference 不相关干扰下CSMA/CA系统QoS的精确预测

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891184

Henning F. Schepker, Ahmad Saad

引用次数: 0

Low Latency HARQ Method Using Early Retransmission Prior to Channel Decoding with Multistage Decision 采用多阶段判决的信道解码前早期重传的低延迟HARQ方法

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891408

Kenta Taniyama, Y. Kishiyama, K. Higuchi

{"title":"Low Latency HARQ Method Using Early Retransmission Prior to Channel Decoding with Multistage Decision","authors":"Kenta Taniyama, Y. Kishiyama, K. Higuchi","doi":"10.1109/VTCFall.2019.8891408","DOIUrl":"https://doi.org/10.1109/VTCFall.2019.8891408","url":null,"abstract":"This paper proposes an extension to a previously reported low latency hybrid automatic repeat request (HARQ) method that uses early retransmission prior to channel decoding to perform multistage judgment at early-retransmission decision. The previous method mitigates the increased transmission latency resulting mainly from the delay time required for channel decoding in HARQ by requesting early retransmission before the channel decoding process is completed based on the channel state information (CSI) obtained before channel decoding. However, the early-retransmission decision may include error that results in unnecessary retransmission and consequently throughput loss. To address the potential throughput loss due to the decision error in the early-retransmission request, we use multistage decision in which the number of bits conveyed by the early-retransmission packet is controlled dependent on the measured CSI before channel decoding. By setting the number of retransmitted coded bits to a low value when the observed channel state seems on the verge of performing early retransmission, we reduce the throughput loss when the early retransmission is not necessary since the initial packet is eventually channel decoded correctly. Simulation results show that the proposed extension further improves the achievable tradeoff between the transmission latency and throughput, which contributes to achieving ultra-reliable low latency communications (URLLC).","PeriodicalId":6713,"journal":{"name":"2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall)","volume":"9 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91532875","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: 6

Low Complexity Hybrid Precoder Design for mmWave Multi-User MIMO Systems: A Non-Iterative Approach 毫米波多用户MIMO系统的低复杂度混合预编码器设计:一种非迭代方法

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891355

Jhe-Yi Lin, Hsuan-Jung Su, Chen-Chieh Hong, Yasuhiro Takano

{"title":"Low Complexity Hybrid Precoder Design for mmWave Multi-User MIMO Systems: A Non-Iterative Approach","authors":"Jhe-Yi Lin, Hsuan-Jung Su, Chen-Chieh Hong, Yasuhiro Takano","doi":"10.1109/VTCFall.2019.8891355","DOIUrl":"https://doi.org/10.1109/VTCFall.2019.8891355","url":null,"abstract":"Massive multiple-input multiple-output (MIMO) will be an important ingredient in millimeter-wave (mmWave) cellular communication systems. A natural application of massive MIMO is simultaneous transmission to multiple users. Unfortunately, the hardware constraints in massive MIMO make it difficult to apply the conventional fully digital beamforming techniques, especially in the mmWave bands. Thus hybrid beamforming (HB) in which the overall beamformer consists of a low-dimensional digital beamformer followed by an analog beamformer has been proposed for reducing the number of costly radio frequency (RF) chains in massive MIMO systems. This paper considers an HB design for multi-user massive MIMO systems. We design a sub-optimal analog precoder based on the downlink-uplink duality. To support the general situation where the number of RF chains is not necessarily equal to the number of users, we propose a greedy selection algorithm to allocate RF chains. Finally, we consider the hardware impairment in analog part and extend the proposed algorithm to support the use of finite resolution phase shifters. Simulation results demonstrate that the proposed HB method makes a better tradeoff between complexity and performance compared with existing methods.","PeriodicalId":6713,"journal":{"name":"2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall)","volume":"15 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87878930","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: 0

KPI Impact on 5G NR Deep Sleep State Adaption 对5G NR深度睡眠状态适应的KPI影响

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall) Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891171

Richard Tano, Martina Tran, P. Frenger

引用次数: 4