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2010 IEEE 72nd Vehicular Technology Conference - Fall最新文献

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Throughput Analysis of the IEEE 802.11p Enhanced Distributed Channel Access Function in Vehicular Environment 车载环境下IEEE 802.11p增强型分布式信道接入功能的吞吐量分析
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594411
Chong Han, M. Dianati, R. Tafazolli, R. Kernchen
{"title":"Throughput Analysis of the IEEE 802.11p Enhanced Distributed Channel Access Function in Vehicular Environment","authors":"Chong Han, M. Dianati, R. Tafazolli, R. Kernchen","doi":"10.1109/VETECF.2010.5594411","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594411","url":null,"abstract":"This paper proposes an analytical model for the throughput of the Enhanced Distributed Channel Access (EDCA)mechanism in IEEE 802.11p MAC sub-layer. Features in EDCA such as different Contention Windows (CW) and Arbitration Interframe Space (AIFS) for each Access Category (AC), and internal collisions are taken into account. The analytical model is suitable for both basic access and the Request-To-Send/Clear-To-Send (RTS/CTS) access mode. The proposed analytical model is validated against simulation results to demonstrate its accuracy.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115985506","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: 46
A Layered Modulation OFDM Scheme Using Differential Symbols as Pilots 一种以差分符号为导频的分层调制OFDM方案
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594210
Guanping Lu, Jun Wang, Zhaocheng Wang, Chao Zhang
{"title":"A Layered Modulation OFDM Scheme Using Differential Symbols as Pilots","authors":"Guanping Lu, Jun Wang, Zhaocheng Wang, Chao Zhang","doi":"10.1109/VETECF.2010.5594210","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594210","url":null,"abstract":"To improve the system capacity of conventional orthogonal frequency division multiplexing (OFDM) systems, the layered modulation OFDM scheme is proposed. The modulated OFDM symbols are separated into two layers as differential modulated symbols and coherent symbols. The differential symbols are used as pilots, which are combined with the coherent modulated data and sent out by the transmitter. At the receiver side, the data in pilot position will be recovered after the differential demodulation. The recovered differential symbols will be used for channel estimation to demodulate the coherent symbols. Furthermore, the differential modulated data can employ low reception threshold and low complexity demodulator, which will facilitate the usage in mobile TV transmission. Simulations show the two layers' reception can be compatible with each other.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"26 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116553070","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
User Experience Analysis of Smartphone Web Surfing in UMTS Networks UMTS网络下智能手机上网用户体验分析
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594600
Ki-Ho Lee, Jong-Ho Park, Jong-Seog Koh
{"title":"User Experience Analysis of Smartphone Web Surfing in UMTS Networks","authors":"Ki-Ho Lee, Jong-Ho Park, Jong-Seog Koh","doi":"10.1109/VETECF.2010.5594600","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594600","url":null,"abstract":"In this paper, we analyze the effect of Cell_FACH and Cell_PCH in the view point of delay and power consumption. By putting the Cell_FACH and Cell_PCH states in practice to Smartphone Web surfing, we verify that the user experience can be enhanced significantly while the power consumption does not increase much","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122656381","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: 5
Energy Efficiency of Heterogeneous Cellular Network 异构蜂窝网络的能量效率
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594361
Wei Wang, G. Shen
{"title":"Energy Efficiency of Heterogeneous Cellular Network","authors":"Wei Wang, G. Shen","doi":"10.1109/VETECF.2010.5594361","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594361","url":null,"abstract":"The growing energy consumption driven by dramatic increases in the number of users and data usage becomes the key issue for operators in meeting demands on cost reduction and environmental impact targets. Deployment of low power base stations or relay stations in traditional macro cells is expected to reduce the total energy consumption of cellular radio networks. This paper investigates the cell's energy efficiency and area energy efficiency measured by \"bit per Joule\" and \"energy efficiency per unit area\". The simulation results suggest that introducing pico stations into macro cells to form heterogeneous network can achieve improved energy efficiency and increased throughput as well.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122683290","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: 131
A Combined Technical and Economic Comparison of Indoor and Outdoor 4G OFDMA Infrastructure 室内和室外4G OFDMA基础设施的综合技术经济比较
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594550
Vincent C. W. Yeung, G. Messier, R. Nemish
{"title":"A Combined Technical and Economic Comparison of Indoor and Outdoor 4G OFDMA Infrastructure","authors":"Vincent C. W. Yeung, G. Messier, R. Nemish","doi":"10.1109/VETECF.2010.5594550","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594550","url":null,"abstract":"This paper presents a technique for using propagation measurements to perform a site-specific technical and economic comparison of indoor and outdoor orthogonal frequency division multiple access (OFDMA) infrastructure. This work is motivated by the fact that fourth generation (4G) network operators have a choice when provisioning a network to serve indoor users. An operator can choose to retrofit existing outdoor cellular macro-cell base station sites with 4G equipment or to deploy new compact indoor pico-cell base stations. This paper will illustrate how multi-antenna propagation measurements can be collected and used to estimate the throughput of an indoor or outdoor base station. This information will then be incorporated into an economic analysis that determine what sort of network will have the lowest operating and capital costs while still meeting user requirements. This approach is illustrated using a university campus case study.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"261 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122760417","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: 3
Performance Sensitivity to Higher Order Moments of Call Interruption and Cell Dwell Times in Cellular Networks 蜂窝网络中呼叫中断高阶矩和蜂窝驻留时间对性能的敏感性
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594228
Andrés Rico-Páez, F. A. Cruz-Pérez, G. Hernández-Valdez
{"title":"Performance Sensitivity to Higher Order Moments of Call Interruption and Cell Dwell Times in Cellular Networks","authors":"Andrés Rico-Páez, F. A. Cruz-Pérez, G. Hernández-Valdez","doi":"10.1109/VETECF.2010.5594228","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594228","url":null,"abstract":"In this paper, sensitivity of the first three standardized moments of both unencumbered call interruption time and cell dwell time on teletraffic performance metrics of wireless cellular networks is investigated. Mathematical analysis for obtaining system-level performance metrics is developed considering that cell dwell time and unencumbered call interruption time are phase-type distributed random variables. Numerical results allow us to quantify the extent by which system performance depends on first three standardized moments of both cell dwell time and unencumbered interruption time.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122962040","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: 3
Reducing Signalling Overhead by an Enhanced Differential Codebook in Multimode MIMO-OFDM Systems 多模MIMO-OFDM系统中增强差分码本降低信令开销
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594069
Wen Wang, Zhan Zhang, H. Kayama
{"title":"Reducing Signalling Overhead by an Enhanced Differential Codebook in Multimode MIMO-OFDM Systems","authors":"Wen Wang, Zhan Zhang, H. Kayama","doi":"10.1109/VETECF.2010.5594069","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594069","url":null,"abstract":"This paper proposes a differential codebook-based method to reduce the feedback overhead for closed-loop MIMO-OFDM systems. With the assumed multimode transmit precoding, both the number of data streams (rank) and the index of precoding matrix are fed back to the transmitter at each sub-band. By exploiting the channel correlation in frequency domain, an enhanced differential codebook (a subset of the whole codebook) is proposed in this paper. Two methods are developed to pre-determine the differential codebook through either joint transition probability or code distance. Simulations and hardware experiment results verify the significantly reduced signaling overhead with ignorable performance degradation.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"235 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114544197","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
HARQ Aided Systematic LT Coding for Amplify-Forward and Decode-Forward Cooperation HARQ辅助系统LT编码的放大前译码合作
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594225
H. Ngo, Thanh Dang Nguyen, L. Hanzo
{"title":"HARQ Aided Systematic LT Coding for Amplify-Forward and Decode-Forward Cooperation","authors":"H. Ngo, Thanh Dang Nguyen, L. Hanzo","doi":"10.1109/VETECF.2010.5594225","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594225","url":null,"abstract":"Systematic Luby Transform (SLT) codes constitute rateless codes, which are capable of adaptively adjusting their code rate depending on the channel quality without explicit channel state information (CSI) at the transmitters. SLTs are also suitable for space-time collaboration aided relay networks. In this paper, an iterative decoding aided SLT scheme is combined with 16-QAM transmission in a wireless relay aided network. The Bit Error Ratio (BER) results and Extrinsic Information Transfer (EXIT) charts are provided to evaluate the performance of the proposed scheme. The simulation results show that the proposed scheme using amplify-and-forward (AF) relaying achieves a 2.5dB gain at a BER of 10^{−5}, while the attainable improvement is nearly 6dB for decode-and-forward (DF) relaying, compared to the non-cooperative scheme, where the 16-QAM and the SLT decoder work independently. Moreover, the AF relaying aided SLT coded 16-QAM scheme is more beneficial, when the relay station is close to the source. By contrast, the DF relaying performs best near the mid-point between the source and destination. In addition, a modified Hybrid Automatic-Repeat-reQuest (HARQ) protocol using incremental redundancy is applied along with the SLT coded 16-QAM scheme to enhance the achievable throughput and energy efficiency of cooperative networks. This arrangement reduces the total transmit power by about 8%, compared to the classic HARQ scheme.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121846517","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
Green Power Amplification Systems for 3G+ Wireless Communication Infrastructure 3G+无线通信基础设施的绿色功率放大系统
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594391
O. Hammi, A. Kwan, M. Helaoui, F. Ghannouchi
{"title":"Green Power Amplification Systems for 3G+ Wireless Communication Infrastructure","authors":"O. Hammi, A. Kwan, M. Helaoui, F. Ghannouchi","doi":"10.1109/VETECF.2010.5594391","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594391","url":null,"abstract":"This paper presents an overview of system-level solutions for green wireless communication infrastructure. It illustrates that a combination of high efficiency amplification system with a linearity restoration technique is unavoidable. Currently, Doherty power amplifiers along with digital predistortion technique are able to achieve high power efficiency. However, due to the limited bandwidth of digital predistortion systems (typically 20MHz), feedforward based linearizers which result in significantly lower power efficiency are still considered for wideband solutions (up to 60MHz). An experimental approach for extending the bandwidth of digital predistortion systems is reported. This setup is then applied for the linearization, using digital predistortion, of a Doherty power amplifier driven by an 8-carrier WCDMA signal having a total bandwidth of 40MHz.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128271779","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
Low-Density Parity-Check Codes for Two-Way Relay Channels 双向中继信道的低密度奇偶校验码
2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594222
X. Zhou, Liang-Liang Xie, Xuemin Shen
{"title":"Low-Density Parity-Check Codes for Two-Way Relay Channels","authors":"X. Zhou, Liang-Liang Xie, Xuemin Shen","doi":"10.1109/VETECF.2010.5594222","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594222","url":null,"abstract":"In this paper, we propose Low-density Parity-check (LDPC) codes for two-way relay channels, where two sources communicate with each other through a relay. At the relay, a simpler interference cancellation joint decoder decodes for the multiple access phase of two-way relay channels. Then, the relay codeword is encoded from two decoded source codewords with LDPC codes. At source, a sub-optimal belief propagation decoder decodes message from codewords received from the relay, the other source and its own source. Simulation results are given to show that our proposed simpler interference cancellation joint decoder at the relay is only 0.2 dB away from the existing sub-optimal belief propagation joint decoder. The required Eb/No at the source is 1.5 dB less than that of the single user channel with the same bit error rate (BER).","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128639842","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: 8
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