2010 IEEE 71st Vehicular Technology Conference最新文献_第7页

Exploiting Redundancy in Iterative H.264 Joint Source and Channel Decoding For Robust Video Transmission 利用迭代H.264联合信源信道解码中的冗余实现鲁棒视频传输

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493802

Nasruminallah, L. Hanzo

{"title":"Exploiting Redundancy in Iterative H.264 Joint Source and Channel Decoding For Robust Video Transmission","authors":"Nasruminallah, L. Hanzo","doi":"10.1109/VETECS.2010.5493802","DOIUrl":"https://doi.org/10.1109/VETECS.2010.5493802","url":null,"abstract":"In this paper we propose joint optimisation of soft-bit assisted iterative joint source and channel decoding with the aid of our proposed EXIT chart optimised redundant source mapping (RSM) designed for guaranteed convergence to achieve an infinitesimally low bit error ratio (BER). Data-Partitioned (DP) H.264 source coded video is used to evaluate the performance of our system employing an iterative combination of RSM assisted soft-bit source decoding (SBSD) and recursive systematic convolution codes (RSC) for transmission over correlated narrowband Rayleigh fading channels. EXIT Charts were utilised to analyse the effect of redundancy using different RSM schemes on the attainable system performance, while keeping the overall bit-rate budget constant. Explicitly, our experimental results show that the proposed error protection scheme using RSM$_2^6$ with $d_{H,min}=4$ outperform the RSM$_2^3$ scheme having $d_{H,min}=2$ by about $5~dB$, which in turn outperforms the RSM$_5^6$ scheme having an identical $d_{H,min}$ and overall system code-rate by about $2~dB$ at the $PSNR$ degradation point of $2~dB$. Additionally, an $E_b/N_0$ gain of $20~dB$ is attained using iterative soft-bit source and channel decoding with the aid of RSM$_2^3$ relative to the identical-rate benchmarker.","PeriodicalId":325246,"journal":{"name":"2010 IEEE 71st Vehicular Technology Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127846698","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

Joint Channel, Carrier-Frequency-Offset and Noise-Variance Estimation for OFDM Systems Based on Expectation Maximization 基于期望最大化的OFDM系统联合信道、载波频偏和噪声方差估计

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493891

Jiankang Zhang, X. Mu, L. Hanzo

引用次数: 12

Iterative Soft-In Soft-Out Sphere Detection for 3GPP LTE 3GPP LTE软入软出球迭代检测

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493717

M. A. Shah, B. Mennenga, G. Fettweis

引用次数: 7

Applicability of Interference Coordination in Highly Loaded HSUPA Network 干扰协调在高负荷HSUPA网络中的适用性

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493860

Frans Laakso, Kari Aho, Thomas Chapman, T. Ristaniemi

{"title":"Applicability of Interference Coordination in Highly Loaded HSUPA Network","authors":"Frans Laakso, Kari Aho, Thomas Chapman, T. Ristaniemi","doi":"10.1109/VETECS.2010.5493860","DOIUrl":"https://doi.org/10.1109/VETECS.2010.5493860","url":null,"abstract":"This paper evaluates the performance of highly loaded High Speed Uplink Packet Access (HSUPA) network with and without network wide static Interference Coordination (IC). IC alternates the priorities for user transmission periods throughout the network to achieve reduced interference levels and higher performance. A large variety of combinations including, e.g., different schedulers, cell center/edge user definitions (user splits) and interference targets are investigated in this paper. Performance is analyzed using a quasi-static system level simulator which is also used to support Third Generation Partnership Project (3GPP) standardization work. The simulator contains detailed and commonly accepted models, for instance, for channel profiles, fading and propagation. The study indicated that IC can bring gain in certain scenarios. However, the gain comes at the expense of fairness leading to users that already have high throughput benefiting from the situation. Moreover, it was shown that the major part of the gain comes from splitting users to different groups and scheduling these groups without any network wide interference coordination.","PeriodicalId":325246,"journal":{"name":"2010 IEEE 71st Vehicular Technology Conference","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124127618","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

A Modulation Dependent Channel Coherence Metric for VANET Simulation Using IEEE 802.11p 基于IEEE 802.11p的VANET仿真的信道相干度量

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5494109

J. Dulmage, M. Fitz, D. Cabric

{"title":"A Modulation Dependent Channel Coherence Metric for VANET Simulation Using IEEE 802.11p","authors":"J. Dulmage, M. Fitz, D. Cabric","doi":"10.1109/VETECS.2010.5494109","DOIUrl":"https://doi.org/10.1109/VETECS.2010.5494109","url":null,"abstract":"The most common physical layer models for network simulations are the bit error rate and the SNR threshold model. In time-varying channels such as those experienced in vehicular networks, these models are assumed valid as long as the packet duration is less than the coherence time of the channel. The coherence time is a statistical measure of the channel invariance. It is independent of the signal parameters or the receiver structure. While it is convenient to decouple the system performance from the channel, this paper shows that this simplification may lead to inaccurate performance assessments and erroneous conclusions. This paper suggests a new metric, the normalized empirical coherence time (NETC), based on results from an extensive simulation campaign of a typical IEEE 802.11p system. The NETC delineates the minimum time (as a percentage of signal duration) over which the system achieves some performance threshold. The metric is explicitly a function of modulation, packet duration, and the traditional coherence time. This new metric could be used in place of the traditional coherence time as a constraint on the packet duration necessary to assume channel variation has negligible impact on performance.","PeriodicalId":325246,"journal":{"name":"2010 IEEE 71st Vehicular Technology Conference","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114572010","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

Efficient Square-Root Algorithms for the Extended V-BLAST with Selective Per-Antenna Rate Control 具有选择性天线速率控制的扩展V-BLAST的有效平方根算法

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493721

Hufei Zhu, Wen Chen, Bin Li

引用次数: 1

SER of Multiple Fixed Gain Amplify-and-Forward Relays with Receive Diversity 具有接收分集的多个固定增益放大和转发继电器的SER

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5494035

M. Elkashlan, Phee Lep Yeoh, Raymond H. Y. Louie, I. Collings

引用次数: 0

System Level Simulation of LTE Networks LTE网络的系统级仿真

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5494007

Josep Colom Ikuno, M. Wrulich, M. Rupp

引用次数: 587

Exact Performance Evaluation of the UWB Differential Transmitted Reference System in Multiuser Environments. 多用户环境下UWB差分传输参考系统的精确性能评估。

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493898

Tsan-Ming Wu, Yi-Fang Hou

引用次数: 3

Linear Regression-Based Delay-Bounded Routing Protocols for Vehicular Ad Hoc Networks 基于线性回归的车载Ad Hoc网络延迟有界路由协议

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5494201

Yuh-Shyan Chen, Chih-Shun Hsu, Yi-Guang Siao

{"title":"Linear Regression-Based Delay-Bounded Routing Protocols for Vehicular Ad Hoc Networks","authors":"Yuh-Shyan Chen, Chih-Shun Hsu, Yi-Guang Siao","doi":"10.1109/VETECS.2010.5494201","DOIUrl":"https://doi.org/10.1109/VETECS.2010.5494201","url":null,"abstract":"Routing protocols for vehicular ad hoc networks (VANETs) have attracted a lot of attention recently. Most of the researches emphasize on minimizing the end-to-end delay without paying attention to reducing the usage of radio. This paper focuses on delay-bounded routing, whose goal is to deliver messages to the destination within user-defined delay and minimize the usage of radio. The messages can be delivered to the destination by the hybrid of data muling (carried by the vehicle) and forwarding (transmitted through radio). In the existing protocol, a vehicle may only switch the delivery strategy (muling or forwarding) at an intersection according to the available time of the next block. To improve previous works, our protocol uses linear regression to predict the available time and the travel distance and thus the vehicle can switch to a proper delivery strategy at a proper moment and can reduce the number of relays by radio. Our protocol contains two schemes: the greedy and centralized schemes. The greedy scheme uses only the local vehicle's speed to predict the available time and decide when to switch the delivery strategy; while the centralized scheme uses the global statistical information to make the decision. Simulation results justify the efficiency of the proposed protocol.","PeriodicalId":325246,"journal":{"name":"2010 IEEE 71st Vehicular Technology Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121923533","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