2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications最新文献_第7页

Zero-forcing vs unitary beamforming in multiuser MIMO systems with limited feedback 有限反馈多用户MIMO系统中的零强迫与单一波束形成

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699777

M. Trivellato, F. Boccardi, Howard C. Huang

引用次数: 26

Service creation for end-users 为最终用户创建服务

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699970

O. Drögehorn, Sian Lun Lau, Niklas Klein, I. König, J. Porras

{"title":"Service creation for end-users","authors":"O. Drögehorn, Sian Lun Lau, Niklas Klein, I. König, J. Porras","doi":"10.1109/PIMRC.2008.4699970","DOIUrl":"https://doi.org/10.1109/PIMRC.2008.4699970","url":null,"abstract":"The current computing and communication services are driven by various technologies. The creation of such services is however not an easy task. The different platforms lack openness that simplifies interoperability. Service development is still mainly technical oriented, where service creation tools are meant for serving and assisting the professional developers. Service creation is not seen as a task for end users right now. In this paper we will discuss how end users could be enabled to create new services, shown on the example within a mobile context-aware service platform. This is achieved by introducing the concept of the technology agnostic approach into the process. We present the conceptual architecture and explain the idea of end-user driven service creation that can provide a solution. Several tools were designed and implemented to prove that the concepts work. With the help of semantic service description, the end users can express their service wishes and create services using a graphical interface technology agnostically. The idea was implemented in two European projects and we have identified the next steps to improve the prototypes as well as the idea. Based on several tools and an underlying platform the ideas have been tested in a development environment for mobile context-aware services. Here end-users are able to design their own services or combine existing services, which can be shared and used by other users later on.","PeriodicalId":125554,"journal":{"name":"2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114362022","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

Robust detection of OFDM signals for cognitive UWB in low SNR with noise uncertainty 低信噪比下认知超宽带OFDM信号的鲁棒检测

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699553

Wei-Cheng Zeng, G. Bi

引用次数: 19

Performance improvement of HSDPA/UMTS networks through dynamic code tuning 通过动态代码调优提高HSDPA/UMTS网络的性能

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699485

M. García-Lozano, S. Ruiz-Boqué, J. Pérez-Romero, O. Sallent

引用次数: 3

Next generation social networks - elicitation of user requirements 下一代社交网络——用户需求的激发

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699966

L. Sørensen, K. Skouby

引用次数: 18

An energy-efficient scheduling for multiple MSSs in IEEE 802.16e broadband wireless IEEE 802.16e宽带无线中多mss的节能调度

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699503

Shih-Chang Huang, Chien Chen, R. Jan, C. Hsieh

引用次数: 7

Coordinate ascent scheduler for the multi-user MIMO uplink channel 多用户MIMO上行信道的坐标上升调度程序

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699436

Patrick Hosein, Tao Wu

{"title":"Coordinate ascent scheduler for the multi-user MIMO uplink channel","authors":"Patrick Hosein, Tao Wu","doi":"10.1109/PIMRC.2008.4699436","DOIUrl":"https://doi.org/10.1109/PIMRC.2008.4699436","url":null,"abstract":"Orthogonal frequency division multiple access (OFDMA) transmission has been chosen for the next generation of wireless networks. Multiple input multiple output (MIMO) techniques are well suited for OFDMA and will be used for increased transmission efficiency for both downlink and uplink. In this paper we focus on space division multiple access (SDMA) techniques for the uplink of such a network. In particular, we consider the problem of scheduling uplink users so as to maximize the uplink resources while satisfying the QoS requirements of each userpsilas flows. We do this by assigning suitable utility functions to user flows that are designed to maintain the specified QoS constraints. Since multiple users can be simultaneously scheduled, the scheduling problem becomes multi-dimensional and, in general, its computational complexity grows non-linearly with the number of users. In addition to choosing the users to be scheduled one must also determine the optimal transmission power for each scheduled user. For the case of two users per frame we show that the optimal power allocation scheme is such that either both users transmit with full power or only one transmits with full power. We then propose a coordinate ascent algorithm for solving the utility-based scheduling problem. Simulations are then used to show that the solution produced by this approach is close to optimal and is quite robust.","PeriodicalId":125554,"journal":{"name":"2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124125248","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

An optimal superimposed training sequence for channel estimation in OFDM systems OFDM系统中信道估计的最优叠加训练序列

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699658

J. P. Nair, Ratnam V. Raja Kumar

{"title":"An optimal superimposed training sequence for channel estimation in OFDM systems","authors":"J. P. Nair, Ratnam V. Raja Kumar","doi":"10.1109/PIMRC.2008.4699658","DOIUrl":"https://doi.org/10.1109/PIMRC.2008.4699658","url":null,"abstract":"In this work an iterative time domain least squares (LS) based channel estimation method using superimposed training (ST) for an orthogonal frequency division multiplexing (OFDM) system over frequency selective fading channels is proposed. The performance of the channel estimator is analyzed in terms of the mean square estimation error (MSEE) and its impact on the uncoded bit error rate (BER) of the OFDM system is studied. The selection criterion for the training sequences is proposed by jointly optimizing the MSEE and the BER of the OFDM system. A chirp based sequence satisfying the selection criterion is proposed and compared with the other sequences found in the literature. The sequence is generalized to incorporate the use of guard subcarriers in the OFDM based system. The proposed sequence offers fairness through providing equal interference in all the data carriers unlike earlier proposals. Experimental studies are carried to study the performance of the proposed scheme and also its comparison with the existing schemes is presented. Also, the proposed scheme is applied to the IEEE 802.16e OFDM standard, its suitability is examined and a case is made with the required design of the sequence.","PeriodicalId":125554,"journal":{"name":"2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129913703","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

A coefficients extraction algorithm for LUT-based Hammerstein predistorters 基于lut的Hammerstein预失真器系数提取算法

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699434

Zhan Shi, Jianmin Zhou, H. Hayashi, T. Kubo

引用次数: 4

A novel OFDM PAPR reduction scheme using selected mapping without explicit side information 一种新的OFDM PAPR降低方案，采用不带显式侧信息的选择映射

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications Pub Date : 2008-12-08 DOI: 10.1109/PIMRC.2008.4699500

S. S. Al-Samahi, S. L. Goff, B. Sharif, C. Tsimenidis

引用次数: 8