2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)最新文献_第8页

A novel scheme for relay cooperation in interweave cognitive radio systems 一种新的交织认知无线电系统中继协作方案

2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010) Pub Date : 2010-11-01 DOI: 10.1109/ISABEL.2010.5702764

Ahmed A. Naguib, A. Elezabi, M. Nafie

引用次数: 1

A filtering-based procedure for the microcalcifications detection in mammograms 一种基于过滤的乳房x光检查微钙化的方法

2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010) Pub Date : 2010-11-01 DOI: 10.1109/ISABEL.2010.5702878

A. Mencattini, G. Rabottino, M. Salmeri, R. Lojacono

引用次数: 0

Joint time-frequency spectrum sensing for Cognitive Radio 认知无线电联合时频频谱传感

2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010) Pub Date : 2010-11-01 DOI: 10.1109/ISABEL.2010.5702774

Wael Guibène, A. Hayar

引用次数: 8

Simplified polynomial digital predistortion for multimode software defined radios 多模软件无线电的简化多项式数字预失真

2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010) Pub Date : 2010-11-01 DOI: 10.1109/ISABEL.2010.5702933

Georgios Kardaras, L. Dittmann, José Soler

{"title":"Simplified polynomial digital predistortion for multimode software defined radios","authors":"Georgios Kardaras, L. Dittmann, José Soler","doi":"10.1109/ISABEL.2010.5702933","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702933","url":null,"abstract":"Increasing the efficiency of mobile communication networks while keeping operational and maintenance cost at reasonable level is a major task for operators. Multimode radios capable of operating according to various mobile broadband standards, such as WCDMA, WiMAX and LTE, represent the new trend for resolving these challenges. A transparent radio solution, agnostic to wireless standards, with high capacity and low power consumption is the overall target. Regulating power consumption for radio modules can be achieved by introducing linearization methods for power amplifiers. This paper presents a simplified approach using polynomial digital predistortion in the intermediated frequency (IF) domain. It is fully implementable in software and no hardware changes are required on the digital or analog platform. The adaptation algorithm selected was Least Mean Squares because of its relevant simplicity compared to more sophisticated adaptation algorithms, which are expensive in FPGA hardware resources. Simulation results show improvement of Adjacent Channel Power Ratio (ACPR) over 20dB by reducing the 3rd and 5th order intermodulation products providing compliance to the strict spectrum mask requirements. In the mean time, the Error Vector Magnitude (EVM) is maintained below 2% meeting the requirements for WiMAX and LTE wireless standards.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132517968","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

Feedback-based cooperative primary channel activity estimation for dynamic spectrum access 基于反馈的动态频谱接入合作主信道活动估计

2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010) Pub Date : 2010-11-01 DOI: 10.1109/ISABEL.2010.5702794

Wenbo Wang, Andres Kwasinski

{"title":"Feedback-based cooperative primary channel activity estimation for dynamic spectrum access","authors":"Wenbo Wang, Andres Kwasinski","doi":"10.1109/ISABEL.2010.5702794","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702794","url":null,"abstract":"In dynamic spectrum access networks, spectrum sensing plays a key role in determining the reliability and efficiency of opportunistic spectrum utilization. However, when treating the transmission over a licensed bandwidth as a black box, most energy detection-based sensing methods lack the ability of adapting the sensor to the changes in channel condition. This paper introduces a feedback mechanism into the cooperative sensing framework for estimating the channel SNR and adapting the detector's parameters. The feedback mechanism provides information to local nodes that is used to dynamically control the decision threshold and maintain a stable performance level when channel condition changes. In this framework, the problem of balancing the channel detection opportunity and the interference risk is formulated by an optimization procedure based on a proposed weighted cost function. A queuing model of the primary user activity is employed to predict the channel state and assist grouping the detection samples for estimating the channel characteristics. Such an estimation mechanism requires no complex design and little a priori knowledge of the primary network. Simulation results show that the cooperative scheme improve performance from local decisions and that the introduction of a feedback mechanism results in a notable performance improvement over all schemes.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116451158","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

Dynamic transmission mode selection in LTE/LTE-Advanced system LTE/LTE- advanced系统的动态传输模式选择

2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010) Pub Date : 2010-11-01 DOI: 10.1109/ISABEL.2010.5702841

Z. Bai, C. Spiegel, G. Bruck, P. Jung, Michael Horvat, J. Berkmann, C. Drewes, B. Gunzelmann

{"title":"Dynamic transmission mode selection in LTE/LTE-Advanced system","authors":"Z. Bai, C. Spiegel, G. Bruck, P. Jung, Michael Horvat, J. Berkmann, C. Drewes, B. Gunzelmann","doi":"10.1109/ISABEL.2010.5702841","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702841","url":null,"abstract":"Recently, the LTE (Long Term Evolution) and LTE-Advanced systems, developed by the 3GPP (Third Generation Partnership Project), has been proposed as the candidate for the 4G systems (forth mobile communication systems). The combination of OFDM (orthogonal frequency division multiplexing) and MIMO (multiple-input multiple-output) transmission technologies has been introduced into LTE systems for achieving high system performance required by 4G systems. Furthermore, the closed-loop concept with codebook based precoding MIMO and dynamic transmission mode selection, termed as RI (rank indicator) selection, have also been deployed in LTE systems to provide robust link connection and large cell coverage. In this manuscript, the authors focused on the study of dynamic transmission mode selection and its implementation in LTE systems. Different RI selection schemes were proposed in this manuscript with the corresponding downlink performance evaluation. According to the analytical and numerical results, the authors conclude that the mutual information based scheme is the best candidate for RI selection in LTE/LTE-Advanced compliant systems.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128571009","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

Proposal of a combined optoelectronic and electroencephalographic method for the study of kinematic and neural correlates of Motor Adaptation 提出一种结合光电和脑电图的方法来研究运动适应的运动学和神经相关

2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010) Pub Date : 2010-11-01 DOI: 10.1109/ISABEL.2010.5702919

E. Molteni, E. Preatoni, V. Cimolin, A. Bianchi, R. Rodano, M. Galli, S. Cerutti

{"title":"Proposal of a combined optoelectronic and electroencephalographic method for the study of kinematic and neural correlates of Motor Adaptation","authors":"E. Molteni, E. Preatoni, V. Cimolin, A. Bianchi, R. Rodano, M. Galli, S. Cerutti","doi":"10.1109/ISABEL.2010.5702919","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702919","url":null,"abstract":"The aim of this work was to design a protocol for the multifactorial assessment of the different sub-functions Motor Learning involves (e.g. planning, execution, correction, …). Attention was focused onto the issue of Motor Adaptation (MA), which occurs when a partial (but not complete) learning of a new motor strategy is needed. Indeed, motor learning is defined as the type of learning in which motor commands are altered to compensate for disturbances in the external environment. We hereby present a report about the methodological set-up which has been developed and tested for the investigation of motor adaptation during repetitive pointing tasks. We exploited the potentialities of the combined use of electroencephalographic and motion analysis techniques to find possible relation between the activity of the central nervous system and the neuro-musculo-skeletal one. The adaptation-related changes in oscillatory brain activity and movement kinematics were monitored during a visually-guided, feedback-controlled, sequence of pointing tasks. Our preliminary results suggest that the proposed protocol: (i) can discern modifications of brain activity in the alpha and beta frequency bands; (ii) is sensible to kinematic alterations; and, (iii), allows a quantitative evaluation of performance in terms of both final result and motor patterns. In this work we identified a bunch of possible neuro-motor biomarkers, which we propose as possible indicators of adaptation.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133608373","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

Gaze-independent BCI spellers based on covert attention and feature attention 基于隐蔽注意和特征注意的注视无关脑机接口拼写器

2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010) Pub Date : 2010-11-01 DOI: 10.1109/ISABEL.2010.5702885

B. Blankertz, Nico M. Schmidt, M. Treder

引用次数: 1

New approaches in personalized e-health: A wearable human avatar-based monitor for ubiquitous care: An avatar-based smart care monitor 个性化电子医疗的新方法:一种可穿戴的基于人类化身的无处不在的监护仪:一种基于化身的智能监护仪

2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010) Pub Date : 2010-11-01 DOI: 10.1109/ISABEL.2010.5702828

M. Prado-Velasco, R. Marín, Ma Gloria del Rio Cidoncha

引用次数: 3

A combined dynamical sequential network for generating coupled cardiovascular signals with different beat types 一种用于产生不同心跳类型耦合心血管信号的组合动态序列网络

2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010) Pub Date : 2010-11-01 DOI: 10.1109/ISABEL.2010.5702821

O. Sayadi, M. Shamsollahi

{"title":"A combined dynamical sequential network for generating coupled cardiovascular signals with different beat types","authors":"O. Sayadi, M. Shamsollahi","doi":"10.1109/ISABEL.2010.5702821","DOIUrl":"https://doi.org/10.1109/ISABEL.2010.5702821","url":null,"abstract":"We present generalizations of the previously published artificial models for generating abnormal cardiac rhythms to provide simulations of coupled cardiovascular (CV) signals with different beat morphologies. Using a joint dynamical formulation, we generate the normal morphologies of the cardiac cycle using a sum of Gaussian kernels, fitted to real CV recordings. The joint inter-dependencies of CV signals are introduced by assuming the same angular frequency and a phase coupling. Abnormal beats are then specified as new dynamical trajectories. An ergadic first-order Markov chain is also used for switching between normal and abnormal beat types. Probability transitions can be learned from real data or modeled by coupling to heart rate and sympathovagal balance. Natural morphology changes from beat-to-beat are incorporated by varying the angular frequency of the cardiac cycle as a function of the inter-beat interval. We demonstrate an example of the use of this model by simulating abnormal electrocardiographic effects including the ectopy and fusion. In addition, the HR-dependent pulsus phenomena are shown to result for ECG-ABP pairs. The approach presented in this paper may therefore serve as an effective framework for synthetic generation of coupled CV signals with different beat morphologies.","PeriodicalId":165367,"journal":{"name":"2010 3rd International Symposium on Applied Sciences in Biomedical and Communication Technologies (ISABEL 2010)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129127964","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