2009 IEEE International Conference on Communications Workshops最新文献_第4页

Business Impact of Relay Deployment for Coverage Extension in 3GPP LTE-Advanced 中继部署对3GPP LTE-Advanced覆盖扩展的业务影响

2009 IEEE International Conference on Communications Workshops Pub Date : 2009-06-14 DOI: 10.1109/ICCW.2009.5208000

Ekkehard Lang, S. Redana, Bernhard Raaf Nokia

引用次数: 111

On the Achievable Rate of ZF-DPC for MIMO Broadcast Channels with Finite Rate Feedback 有限速率反馈MIMO广播信道ZF-DPC可实现速率研究

2009 IEEE International Conference on Communications Workshops Pub Date : 2009-06-14 DOI: 10.1109/ICCW.2009.5208023

Wei Miao, Xiao-Diao Chen, Yunzhou Li, Shuyun Zhou, Jun Wang

{"title":"On the Achievable Rate of ZF-DPC for MIMO Broadcast Channels with Finite Rate Feedback","authors":"Wei Miao, Xiao-Diao Chen, Yunzhou Li, Shuyun Zhou, Jun Wang","doi":"10.1109/ICCW.2009.5208023","DOIUrl":"https://doi.org/10.1109/ICCW.2009.5208023","url":null,"abstract":"In this paper we study a MIMO fading broadcast channel where each receiver has perfect channel state information (CSI) while the transmitter only acquires quantized CSI by finite rate feedback. We analyze the zero-forcing dirty-paper coding (ZF-DPC) scheme, which is a nonlinear precoding scheme inherently superior to linear ZF beamforming. Lower bound in closed-form expression and upper bound on the achievable ergodic rate of ZF-DPC with Gaussian inputs and uniform power allocation are derived. Based on the closed-form lower bound, sufficient conditions on the feedback channels to ensure non-zero and full downlink multiplexing gain are obtained. Specifically, in order to achieve the downlink multiplexing gain of αM (0 <α ≤ 1), it is sufficient to scale the number of feedback bits B per user as B = α(M −1)log2 P N0 where M is the number of transmit antennas and P N0 is the average downlink SNR. the results there show that the system becomes interference- limited with fixed amount of feedback while the number of feedback bits per user must increase linearly with the logarithm of the downlink SNR to maintain the full downlink multiplexing gain. In this paper, we study the achievable rate of zero-forcing dirty-paper coding (ZF-DPC) (1), a nonlinear precoding scheme inherently superior to ZF-BF due to its interference precancelation characteristic, for a MIMO broadcast channel with finite rate feedback. We adopt the vector quantization distortion measure of the angle between the codevector and the downlink channel vector, and perform random vector quantization (RVQ) (3)-(5) for analytical convenience. Our main contributions and key findings are as follows:","PeriodicalId":271067,"journal":{"name":"2009 IEEE International Conference on Communications Workshops","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121023735","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

Energy Profile Aware Routing 能源分布感知路由

2009 IEEE International Conference on Communications Workshops Pub Date : 2009-06-14 DOI: 10.1109/ICCW.2009.5208041

J. Restrepo, C. Gruber, C. Mas Machuca

引用次数: 209

On the User Performance of LTE UE Power Savings Schemes with Discontinuous Reception in LTE LTE接收不连续的LTE终端节能方案的用户性能研究

2009 IEEE International Conference on Communications Workshops Pub Date : 2009-06-14 DOI: 10.1109/ICCW.2009.5208042

J. Wigard, T. Kolding, Lars Dalsgaard, Claudio Coletti

引用次数: 70

A Multi-User Multi-Rate OFDMA Transmission System Based on Orthogonal Subcarrier Grouping 基于正交子载波分组的多用户多速率OFDMA传输系统

2009 IEEE International Conference on Communications Workshops Pub Date : 2009-06-14 DOI: 10.1109/ICCW.2009.5208103

L. D'Orazio, M. Panizza, C. Sacchi

引用次数: 9

Determining Host Location on the Internet: The Case of VoIP Emergency Calls 确定Internet上的主机位置:以VoIP紧急呼叫为例

2009 IEEE International Conference on Communications Workshops Pub Date : 2009-06-14 DOI: 10.1109/ICCW.2009.5208008

S. Ashtarifar, A. Matrawy

引用次数: 2

Collaborative Spectrum Sensing for Cognitive Radio 认知无线电协同频谱感知

2009 IEEE International Conference on Communications Workshops Pub Date : 2009-06-14 DOI: 10.1109/ICCW.2009.5208032

K. Arshad, K. Moessner

引用次数: 31

On MAC Layer Throughput Enhancements in LTE-A by Downlink Macro Diversity 利用下行链路宏分集增强LTE-A的MAC层吞吐量

2009 IEEE International Conference on Communications Workshops Pub Date : 2009-06-14 DOI: 10.1109/ICCW.2009.5208024

S. Brueck, J. Giese, L. Zhao, A. Dekorsy

引用次数: 5

Network Coding for Mobile Devices - Systematic Binary Random Rateless Codes 移动设备的网络编码。系统二进制随机无速率码

2009 IEEE International Conference on Communications Workshops Pub Date : 2009-06-14 DOI: 10.1109/ICCW.2009.5208076

J. Heide, M. Pedersen, F. Fitzek, T. Larsen

{"title":"Network Coding for Mobile Devices - Systematic Binary Random Rateless Codes","authors":"J. Heide, M. Pedersen, F. Fitzek, T. Larsen","doi":"10.1109/ICCW.2009.5208076","DOIUrl":"https://doi.org/10.1109/ICCW.2009.5208076","url":null,"abstract":"In this work we consider the implementation of Random Linear Network Coding (RLNC) on battery constrained mobile devices with low computational capabilities such as; sensors, mobile phones and Personal Digital Assistants (PDAs). It is non-trivial to create an efficient implementation of RLNC which is needed to ensure high throughput, low computational requirements and energy consumption. As a consequence there does not, to the best of our knowledge, exist any such implemen- tation for mobile device that allow for throughput close to what can be achieved in e.g. Wireless Local Area Network (WLAN). In this paper we propose to base RLNC on the binary Galois field and to use a systematic code. We have implemented this approach in C++ and Symbian C++ and achieve synthetic encoding/decoding throughput of up to 40/30 MB/s on a Nokia N95-8GB mobile phone and 1.5/1.0 GB/s on a high end laptop. Index Terms—Mobile devices, Network coding, Reliable Mul- ticast. I. INTRODUCTION A large body of existing literature (1) treats the theoretical benefits of Network Coding (NC). However, the costs of implementing NC in terms computational overhead, memory consumption or network usage is often not considered. In this work we consider the implementation of RLNC on mobile bat- tery constrained devices with low computational capabilities, such as sensors, mobile phones or PDAs. The computations performed using RLNC is based on finite fields arithmetic also known as Galois fields. From a coding perspective the field size, q, used should be large to ensure that coded packets are linearly independent, additionally increasing the size of the field elements is advantageous as this reduces the number of","PeriodicalId":271067,"journal":{"name":"2009 IEEE International Conference on Communications Workshops","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115393823","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: 164

Decentralized In-Network Management for the Future Internet 面向未来互联网的分散网内管理

2009 IEEE International Conference on Communications Workshops Pub Date : 2009-06-14 DOI: 10.1109/ICCW.2009.5207964

A. González Prieto, D. Dudkowski, C. Meirosu, C. Mingardi, G. Nunzi, M. Brunner, R. Stadler

引用次数: 27