Proceedings 2007 IEEE SoutheastCon最新文献_第7页

Demodulator design for collaborative signal reinforcement in sensor networks 传感器网络中协同信号增强的解调器设计

Proceedings 2007 IEEE SoutheastCon Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342871

T.B. Fleming, P. Athanas

引用次数: 0

A high-speed impedance controlled output driver using pre-drive control for standard CMOS technology 采用标准CMOS技术的预驱动控制的高速阻抗控制输出驱动器

Proceedings 2007 IEEE SoutheastCon Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342858

Brian Butka

引用次数: 0

Polling the smart battery for efficiency: Lifetime optimization in battery-sensing intrusion protection systems 轮询智能电池的效率:电池传感入侵保护系统的寿命优化

Proceedings 2007 IEEE SoutheastCon Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342999

T. Buennemeyer, T. Nelson, R. Marchany, J. Tront

引用次数: 8

A space-time block coding system with backward compatibility for OFDM-based WLANs 基于ofdm的无线局域网的向后兼容空时分组编码系统

Proceedings 2007 IEEE SoutheastCon Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342864

Jianhua Liu, Jun Yu Li

引用次数: 1

Dynamic spectrum allocation in cognitive radio using hidden Markov models: Poisson distributed case 基于隐马尔可夫模型的认知无线电动态频谱分配:泊松分布情况

Proceedings 2007 IEEE SoutheastCon Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342884

I. Akbar, W. Tranter

{"title":"Dynamic spectrum allocation in cognitive radio using hidden Markov models: Poisson distributed case","authors":"I. Akbar, W. Tranter","doi":"10.1109/SECON.2007.342884","DOIUrl":"https://doi.org/10.1109/SECON.2007.342884","url":null,"abstract":"Cognitive radio networks can be designed to manage the radio spectrum more efficiently by utilizing the spectrum holes in primary users' licensed frequency bands. Recent studies have shown that the radio spectrum is poorly utilized by the licensed users even in urban geographical areas. This spectrum utilization can be improved significantly by making it possible for secondary users (who are not being served by the primary system) to access spectrum holes, i.e., frequency bands not used by licensed users. In this novel work, we use hidden Markov models (HMMs) to model and predict the spectrum occupancy of licensed radio bands. The proposed technique can dynamically select different licensed bands for its own use with significantly less interference from and to the licensed users. It is found that by predicting the duration of spectrum holes of primary users, the CR can utilize them more efficiently by leaving the band, that it currently occupies, before the start of traffic from the primary user of that band. We propose a simple algorithm, called the Markov-based channel prediction algorithm (MCPA), for dynamic spectrum allocation in cognitive radio networks. In this work, we present the performance of our proposed dynamic spectrum allocation algorithm when the channel state occupancy of primary users are assumed to be Poisson distributed. The impact of CR transmission on the licensed users is also presented. It is shown that significant SIR improvements can be achieved using HMM based dynamic spectrum allocation as compared to the traditional CSMA based approach. The results obtained using HMM are very promising and HMM can offer a new paradigm for predicting channel behavior in cognitive radio, an area that has been of much research interest lately.","PeriodicalId":423683,"journal":{"name":"Proceedings 2007 IEEE SoutheastCon","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131432217","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: 231

Modeling and simulation of flexible robot manipulator with a prismatic joint 具有移动关节的柔性机器人机械臂建模与仿真

Proceedings 2007 IEEE SoutheastCon Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342898

H. Basher

{"title":"Modeling and simulation of flexible robot manipulator with a prismatic joint","authors":"H. Basher","doi":"10.1109/SECON.2007.342898","DOIUrl":"https://doi.org/10.1109/SECON.2007.342898","url":null,"abstract":"This correspondence investigates the modeling and simulation of a single link flexible robot arm (beam) having both rotational and translation motions, and the effects of higher-order dynamics on the response of the arm. The model is suitable for the development of control strategy to suppress the vibration of the arm. Assumed modes techniques have been reported in the literature where only two or three modes are retained and the rest are truncated which in many cases is inadequate for high performance control system development. In this study, an analytical model of the manipulator, characterized by an infinite number of modes, is developed using Euler-Bernoulli beam equation and modal expansion method. The infinite-dimensional transcendental transfer function for the robot arm is formulated without modal approximation that is conveniently transformed into state-space form. The effects of higher-order dynamics are demonstrated through computer simulations using National Instrument's LabVIEW software package. In this approach, adding modes or increasing the order of transfer function is straightforward and provides a straightforward check of the effect of ignoring higher-order terms. The results are illustrated for different modes through an example.","PeriodicalId":423683,"journal":{"name":"Proceedings 2007 IEEE SoutheastCon","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131299701","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: 19

Validation and analysis process in component based design 基于组件设计的验证和分析过程

Proceedings 2007 IEEE SoutheastCon Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342886

R. Wu

引用次数: 0

Real-time audio transceiver utilizing 802.11b wireless technology 利用802.11b无线技术的实时音频收发器

Proceedings 2007 IEEE SoutheastCon Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342989

D. Jakubisin, M. Davis, C. Roberts, I. Howitt

引用次数: 7

Performance modeling of resilient information system for remote data storage 远程数据存储弹性信息系统的性能建模

Proceedings 2007 IEEE SoutheastCon Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342921

Y. Khalil, A. Kumar, Adel Said Elmaghraby, J. Graham

引用次数: 1

Telemammography across an ad hoc network 跨自组织网络的遥测

Proceedings 2007 IEEE SoutheastCon Pub Date : 2007-03-22 DOI: 10.1109/SECON.2007.342929

E. Sheybani, G. Javidi

{"title":"Telemammography across an ad hoc network","authors":"E. Sheybani, G. Javidi","doi":"10.1109/SECON.2007.342929","DOIUrl":"https://doi.org/10.1109/SECON.2007.342929","url":null,"abstract":"One of the goals of the National Cancer Institute (NCI) cancer control program to reach more than 80% of the eligible women in mammography screening by the year 2000 yet remains as a challenge. That is primarily due to 1) the fact that examination process is a complex and lengthy one and 2) it is not available to the majority of women who live in remote and urban sites. This problem can be solved using ad hoc networking technologies and signal processing algorithms. Software modules can help detect true negatives (TN), while marking true positives (TP) for further investigation. This reduces the load on network and radiologists by a tremendous amount. Ad hoc networking equipment makes clinic-lab connection more accessible and image enhancement algorithms readily available to the radiologists. In this research automatic robust computer assisted diagnostic (CAD) methods for mass detection in breast cancer have been associated with region of interest (ROI) compression for efficient transmission over ad hoc networks. This telemammography system for remote computer-aided breast cancer detection and diagnosis has the advantage of better reach of women for cancer screening and at the same time provides the diagnosis with higher efficiency, better accuracy, and lower cost.","PeriodicalId":423683,"journal":{"name":"Proceedings 2007 IEEE SoutheastCon","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130795383","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