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2008 International Symposium on Communications and Information Technologies最新文献

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Outage Performance of Opportunistic Amplify-and-Forward Relay under Nakagami Fading 中上衰落条件下机会放大转发中继的中断性能
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700225
Qinghai Yang, K. Kwak, Fenglin Fu
{"title":"Outage Performance of Opportunistic Amplify-and-Forward Relay under Nakagami Fading","authors":"Qinghai Yang, K. Kwak, Fenglin Fu","doi":"10.1109/ISCIT.2008.4700225","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700225","url":null,"abstract":"The outage performance for the opportunistic amplify-and-forward relaying strategies under Nakagami-m fading channels is investigated in this paper. A closed-form expression for the outage probability is derived. Simulation results verify our theoretical solutions.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"77 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":"133624367","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
Modifications to the Lagrange Interpolation Method of Decoding Reed Solomon Codes 里德-所罗门码译码拉格朗日插值法的改进
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700234
Ryan Gabryst, J. Wolf, Ryan Gabrys
{"title":"Modifications to the Lagrange Interpolation Method of Decoding Reed Solomon Codes","authors":"Ryan Gabryst, J. Wolf, Ryan Gabrys","doi":"10.1109/ISCIT.2008.4700234","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700234","url":null,"abstract":"This paper presents several modifications of the decoding algorithm for Reed Solomon codes based upon Lagrange Interpolation. One modification reduces the average number of candidate code polynomials computed and yet still achieves maximum likelihood decoding. A second modification reduces both the average and the maximuThis paper presents several modifications of the decoding algorithm for Reed Solomon codes based upon Lagrange Interpolation. One modification reduces the average number of cThis paper presents several modifications of the decoding algorithm for Reed Solomon codes based upon Lagrange interpolation. One modification reduces the average number of candidate code polynomials computed and yet still achieves maximum likelihood decoding. A second modification reduces both the average and the maximum number of candidate code polynomials computed but is no longer maximum likelihood. Decoding beyond the guaranteed error correction capability of the code is also discussed.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","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":"116151408","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
Analysis and Compiarison of a customi ze Infant Incubator Cambier Sap Using Fnite Eemient Method 基于有限元法的定制婴儿培养箱Cambier Sap分析与比较
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700209
Somsri Daochai, N. Chuaychunu, Meechai Lohakan, C. Pintavirooj
{"title":"Analysis and Compiarison of a customi ze Infant Incubator Cambier Sap Using Fnite Eemient Method","authors":"Somsri Daochai, N. Chuaychunu, Meechai Lohakan, C. Pintavirooj","doi":"10.1109/ISCIT.2008.4700209","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700209","url":null,"abstract":"The infant incubator is an essential medical device for a new born whose weight is lower than a standard level or early birth. In general, many parameters such as air temperature, air circulation, humidity, oxygenation, noise level and sterilization must be controlled strictly all over an operation range. In this paper, we presented an analysis of heat transfer and air flow circulation in chamber hood by comparing between 2 different design chambers as a semi-hexagonal hood and a dome hood. COMSOL Multiphysic3.3, a three dimensional simulation program was used in our experiment which basing on fluid dynamics and convective heat transfer equation. The simulation was performed under normal room circumstance at 25. The results show that a thermal distribution and air circulation of dome hood are quite better than semi-hexagonal hood noticeably.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"204 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":"116653634","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
New PTS Method with Coded Side Information Technique for PAPR Reduction in OFDM Systems 利用编码侧信息技术降低OFDM系统PAPR的PTS新方法
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700163
C. Pradabpet, S. Yoshizawa, S. Chivapreecha, K. Dejhan
{"title":"New PTS Method with Coded Side Information Technique for PAPR Reduction in OFDM Systems","authors":"C. Pradabpet, S. Yoshizawa, S. Chivapreecha, K. Dejhan","doi":"10.1109/ISCIT.2008.4700163","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700163","url":null,"abstract":"In this paper, we propose a new PAPR reduction by using a partial transmit sequences (PTS) method with coded side information (SI) technique. These methods are used in an orthogonal frequency division multiplexing (OFDM) system. The OFDM employs orthogonal sub-carriers for data modulation. These sub-carriers unexpectedly present a large peak to average power ratio (PAPR) in some cases. In order to reduce PAPR, the sequence of input data is partitioned into disjoint sub-block of PTS. If number of sub-block increases, high efficiency of PAPR reduction can be obtained. However, a quite large calculation cost must be demanded and thus it is impossible to obtain the optimum PTS. In the proposed method, we introduce a coded side information technique assuming the pseudo-optimum condition into the PTS. The total calculation cost becomes drastically reduced and side information bits for recovering original data in demodulation. In simulation results, the proposed method demonstrated the improvement of PAPR and bit error rate (BER) performance.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","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":"130418607","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: 9
Single-Feed Planar Antenna for Electric and Magnetic Fields Reception for Mobile Communications 用于移动通信电场和磁场接收的单馈平面天线
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700157
H. H. Uchida, H. Matsui, T. Wakabayashi
{"title":"Single-Feed Planar Antenna for Electric and Magnetic Fields Reception for Mobile Communications","authors":"H. H. Uchida, H. Matsui, T. Wakabayashi","doi":"10.1109/ISCIT.2008.4700157","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700157","url":null,"abstract":"The fading phenomenon is enumerated in a factor of quality degradation in mobile communication technologies. In this paper, a single-feed planar antenna is proposed for electric and magnetic fields reception in order to improve the degradation of the received signal level due to a fading phenomenon. The proposed antenna has a line element and a conducting ground plane with a slot which are printed on the dielectric substrate. The antenna was analyzed by FDTD method. The characteristics of the single-feed planar antenna for electric and magnetic fields reception and its components (planar monopole antenna and planar slot antenna) are described.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"5 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":"127439290","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: 2
Wide-Band CMOS Precision Rectifier Circuit 宽带CMOS精密整流电路
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700205
M. Kumngern, S. Lerkvaranyu, K. Dejhan
{"title":"Wide-Band CMOS Precision Rectifier Circuit","authors":"M. Kumngern, S. Lerkvaranyu, K. Dejhan","doi":"10.1109/ISCIT.2008.4700205","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700205","url":null,"abstract":"A wide-band precision CMOS rectifier, which is very suitable for integrated circuit implementation, is presented. The proposed circuit consists of a voltage-to-current converter, two precision rectifiers and four current-to-voltage converters that performs positive half-wave, negative half-wave, positive full-wave and a negative full-wave rectifications into a single circuit. The precision current-mode rectifier with operating in class-AB is employed to provide the high-frequency capability of the circuit. The circuit exhibits a very versatility, high operating frequency and good temperature stability. The proposed configuration is very suitable for integrated circuit implementation both CMOS and bipolar technologies. The simulation results in CMOS technology demonstrate the performance of the proposed circuit.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"7 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":"129949231","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
Fast Haptic Simulation of Brittle Object using Bounded Force Propagation Model 基于有界力传播模型的脆性物体快速触觉仿真
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700260
Nontapol Somrang, Noppom Chotikakamthorn, Siraset Jirapatchandej
{"title":"Fast Haptic Simulation of Brittle Object using Bounded Force Propagation Model","authors":"Nontapol Somrang, Noppom Chotikakamthorn, Siraset Jirapatchandej","doi":"10.1109/ISCIT.2008.4700260","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700260","url":null,"abstract":"In this paper, a method for real-time simulation of brittle object with haptic force feedback is described. Based on the rigid-constraint model, originally developed for visual-only image synthesis, a virtual object is represented as a set of point-masses connected by distance-preserving linear constraints. The drawback of the original method is that it is time consuming and not suitable for real-time haptic simulation. In this paper, a bounded force propagation model is developed to reduce calculation time as required by the original method. In addition, a haptic-endpoint position prediction method is applied to prepare the simulation system for the calculation required by the method. These refinements allow the brittle object simulation method to be applicable to real-time interactive applications with haptic force feedback.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"36 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":"129548351","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
White Blood Cell Segmentation by Distance Mapping Active Contour 基于距离映射活动轮廓的白细胞分割
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700193
A. Sanpanich, W. Iampa, C. Pintavirooj, P. Tosranon
{"title":"White Blood Cell Segmentation by Distance Mapping Active Contour","authors":"A. Sanpanich, W. Iampa, C. Pintavirooj, P. Tosranon","doi":"10.1109/ISCIT.2008.4700193","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700193","url":null,"abstract":"White blood cell segmentations are an important research issue in Hematology and related study field. Our research proposes a segmentation of nucleus and cytoplasm of peripheral white blood cell from color image slides. The segmentation is started by using a dilated perimeter of nucleus convex hull which propagated into a surrounding region in order to setup a color reference table of cytoplasm. Primary cytoplasm region was then estimated roughly. Distance mapping was applied to this primary area and used to create a gradient vector flow. The active contouring technique was then implemented according to the vector field and finally segmented the WBC boundary. The obtained segmentation outputs show that active contour which guided by the distance mapping from a surrounding area is able to extract nucleus and cytoplasm region efficiently.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"1279 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120968849","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: 14
The Tradeoff between Channel Capacity and Out-of-Band Interference of Cognitive Radios 认知无线电信道容量与带外干扰的权衡
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700222
Cheng Yang, Zheng Zhou, Xuebin Sun, Y. Ye
{"title":"The Tradeoff between Channel Capacity and Out-of-Band Interference of Cognitive Radios","authors":"Cheng Yang, Zheng Zhou, Xuebin Sun, Y. Ye","doi":"10.1109/ISCIT.2008.4700222","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700222","url":null,"abstract":"Two points need to be considered on power loading policy of cognitive radio (CR) systems. The first is to maximize the channel capacity over the given frequency band, which is detected usable for CR systems. The second is the out-of-band interference suppression of the CR systems. In the paper based on the mathematical expression of the interference power caused by MB-OFDM based CR systems, the relationship of the symbols on the sub-carriers can be obtained. To realize the relationship the sub-carrier weighting method can be adopted. With the effect of the weighting factors, the symbols relationship can be satisfied, and simultaneously the maximum channel capacity can be achieved on certain degree. The simulation results of the relationship among the three parameters, channel capacity, interference power and total transmission power, also shows that a better tradeoff can be achieved between the channel capacity and the interference power.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"226 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":"115745832","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
Machine Link Resource Check Scheme for Topology-Based Multi-Channel Hybrid Ad Hoc Networks 基于拓扑的多通道混合自组织网络的机器链路资源检测方案
2008 International Symposium on Communications and Information Technologies Pub Date : 2008-12-08 DOI: 10.1109/ISCIT.2008.4700281
Yingji Zhong, K. Kwak, Ji-Won Chung
{"title":"Machine Link Resource Check Scheme for Topology-Based Multi-Channel Hybrid Ad Hoc Networks","authors":"Yingji Zhong, K. Kwak, Ji-Won Chung","doi":"10.1109/ISCIT.2008.4700281","DOIUrl":"https://doi.org/10.1109/ISCIT.2008.4700281","url":null,"abstract":"The multi-scenario of the topology in the hybrid ad hoc networks is studied and a novel cross layer resource scheduling scheme based on the topology is proposed in this paper. The proposed scheme integrated the attributes both of the new performance evaluation machine link resource check metric (MLRCM) and the topology space with the special multi-scenario. The power consumption of each node can be optimized due to the minimum resource occupation with the help of this scheme. Simulation results show that the proposed scheme can give power control guarantee to the multi-channel hybrid ad hoc networks in the variable node loads and transmission powers, and make the node stable to support multi-hops at the same time.","PeriodicalId":215340,"journal":{"name":"2008 International Symposium on Communications and Information Technologies","volume":"142 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":"115467157","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
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