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2010 5th International Symposium on Telecommunications最新文献

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An ultra low power digitally controlled oscillator with low jitter and high resolution 超低功耗数字控制振荡器，具有低抖动和高分辨率
2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734048
Nasser Erfani Majd, M. Lotfizad, A. Abadian, Mohammad Bagher Ghaznavi Ghoushchi
{"title":"An ultra low power digitally controlled oscillator with low jitter and high resolution","authors":"Nasser Erfani Majd, M. Lotfizad, A. Abadian, Mohammad Bagher Ghaznavi Ghoushchi","doi":"10.1109/ISTEL.2010.5734048","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734048","url":null,"abstract":"In this paper, an ultra low power and low jitter 12bit CMOS digitally controlled oscillator (DCO) design is presented. Based on a ring oscillator implemented with low power Schmitt trigger based inverters. Simulation of the proposed DCO using 32nm CMOS Predictive Transistor Model (PTM) achieves controllable frequency range of 550MHz∼830MHz with a wide linearity and high resolution. Monte Carlo simulation demonstrates that the time-period jitter due to random power supply fluctuation is under 31ps and the power consumption is 0.5677mW at 750MHz with 1.2V power supply and 0.53-ps resolution. The proposed DCO has a good robustness to voltage and temperature variations and better linearity comparing to the conventional design.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"11 suppl_1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129319962","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
Deblocking filter based on complex diffusion and bilateral filter for video coding 基于复杂扩散和双边滤波的视频编码去块滤波
2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734113
Hossein Khodabakhshi Rafsanjani, M. Zeinali, S. Talebi
{"title":"Deblocking filter based on complex diffusion and bilateral filter for video coding","authors":"Hossein Khodabakhshi Rafsanjani, M. Zeinali, S. Talebi","doi":"10.1109/ISTEL.2010.5734113","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734113","url":null,"abstract":"Nonlinear diffusion-based selective smoothing methods reduce the gradual changes well. These methods well preserve the edges and even enhance them in some cases. In this paper a new method based on the combination of complex diffusion and bilateral filter is proposed. The complex diffusion is applied to blocky frame as a preprocessing step to apply the bilateral filter. Experimental results confirm the performance of the proposed method.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"51 1304 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129176002","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
MUSIC and MVDR DOA estimation algorithms with higher resolution and accuracy MUSIC和MVDR DOA估计算法具有更高的分辨率和精度
2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734002
F. Akbari, S. Shirvani Moghaddam, V. Tabataba Vakili
{"title":"MUSIC and MVDR DOA estimation algorithms with higher resolution and accuracy","authors":"F. Akbari, S. Shirvani Moghaddam, V. Tabataba Vakili","doi":"10.1109/ISTEL.2010.5734002","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734002","url":null,"abstract":"One of the most important research works on the field of adaptive array antennas is to increase the accuracy and resolution of Direction Of Arrival (DOA) estimation in a joint state. In this investigation, two well-known DOA estimation algorithms, MUltiple SIgnal Classification (MUSIC) and Minimum Variance Distortionless Response (MVDR) are modelled and simulated in new proposed array geometry. This paper provides a comparison between Uniform Linear Array (ULA) and Proposed Array (PA) geometries in resolving narrowband signal sources located closely. Proposed array adds two elements to the ULA in top and bottom of the array axis. DOA estimation performance has been compared in terms of accuracy and resolution threshold. Simulation results show that ULA cannot detect the sources located at close angles to the array endfire as well as middle angles and isn't able to resolve closely spaced sources in this area successfully. The proposed array can remove this drawback while having an identical accuracy for middle angles. Consequently, by using the proposed array, a better resolution and performance is achieved for the border angles with almost the same array size and computational complexity in both MUSIC and MVDR algorithms.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"464 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115868675","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: 31
A technology selection method: Hospital location detection system 一种技术选择方法:医院位置检测系统
2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734166
A. Asosheh, H. Khanifar
{"title":"A technology selection method: Hospital location detection system","authors":"A. Asosheh, H. Khanifar","doi":"10.1109/ISTEL.2010.5734166","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734166","url":null,"abstract":"In a complex and dynamic environment such as hospitals, location detection systems can be employed to improve resource management and quality of services. Many technologies (radio frequency, ultrasound) have been deployed with advantages and drawbacks regarding the specific demanded application. They are compared together from several aspects such as coverage area, accuracy and health concern in this paper. A structural methodology based on multi attribute decision making will be recommended to facilitate system selection, based on managers' priorities and organization infrastructure. The method is used in NIOC1 hospital in Tehran and according to their situations the best technology is selected. At the result ultrasound location detection system offered as the first choice.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115469736","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
A modified fast marriage in honey bee optimization algorithm 一种改进的蜜蜂快速婚姻优化算法
2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734159
M. Vakil-Baghmisheh, M. Salim
{"title":"A modified fast marriage in honey bee optimization algorithm","authors":"M. Vakil-Baghmisheh, M. Salim","doi":"10.1109/ISTEL.2010.5734159","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734159","url":null,"abstract":"In this paper we present a modified version of an existing honey bee optimization algorithm: the modified fast marriage in honey bee optimization (MFMBO). Then we compare performances of this new algorithm and three existing bee algorithms, i.e. the artificial bee colony (ABC), the queen bee (QB), and the fast marriage in honey bee optimization (FMBO) on four benchmark functions for various numbers of variables up to 100. The obtained results show that the modified algorithm is faster than the others in most cases. Especially for Griewank and Schwefel functions by increasing precision of answer and number of variables, the difference between the speeds of the FMBO and MFMBO becomes prominent. In general the MFMBO algorithm is quite competitive with the other mentioned algorithms.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114288005","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
A new solution for the permutation problem in the frequency-domain BSS using power-ratio correlation 提出了一种利用功率比相关解决频域BSS中置换问题的新方法
2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734000
M. Hesam, M. Geravanchizadeh
{"title":"A new solution for the permutation problem in the frequency-domain BSS using power-ratio correlation","authors":"M. Hesam, M. Geravanchizadeh","doi":"10.1109/ISTEL.2010.5734000","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734000","url":null,"abstract":"This paper proposes a new method to solve the permutation problem in the frequency-domain source separation based on Independent Component Analysis (ICA). Traditionally, the correlation coefficient of separated signal envelopes is calculated to determine if the separated signals originate from the same source. Recently, a new measure has been proposed, which represents the dominance of the separated signals in the mixtures based on the power-ratio, instead of separated signal envelopes. In this paper, we use the interfrequency correlation between measures of power-ratio of the separated signals in the mixtures to solve the permutation problem. Experimental results show that our method provides an almost perfect solution to the permutation problem for the case, where two sources are mixed in a room whose reverberation time is 130 ms.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"339 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116193926","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
Effect of a phasor group delay ripple on the performance of phase-modulator based microwavephotonic filter 相量群延迟纹波对相位调制器微波光子滤波器性能的影响
2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734014
A. Mokhtari, M. Akbari
{"title":"Effect of a phasor group delay ripple on the performance of phase-modulator based microwavephotonic filter","authors":"A. Mokhtari, M. Akbari","doi":"10.1109/ISTEL.2010.5734014","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734014","url":null,"abstract":"We have developed an analytic approach to investigate the effect of a sinusoid group delay ripple on the performance of phase-modulated microwave photonic filter. Frequency of fabricated sinusoid ripple determines the pole's frequency of the resulted transfer function. Comparison of our proposed analytical approach with simulated OptiSystem results shows a good agreement.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125596039","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
Physically secure wireless transmission using Deliberate Symbol Convolution 物理安全无线传输使用故意符号卷积
2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5733996
M. Mohammadi, G. Mohammadkhani
{"title":"Physically secure wireless transmission using Deliberate Symbol Convolution","authors":"M. Mohammadi, G. Mohammadkhani","doi":"10.1109/ISTEL.2010.5733996","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5733996","url":null,"abstract":"A physical layer security scheme based on joint antenna and timeslot randomization is proposed which is named Deliberate Symbol Convolution. In this scheme, consecutive phase modulated data symbols are convolved using random weights and the convolved symbols are sent simultaneously over a multi input - single output channel. The legitimate channel is estimated at the transmitter side using pilot symbols transmitted from the legitimate user. It is shown that randomization across timeslots compensates for the constraint on the length of data packets as well as the required number of receive antennas.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126098848","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
Throughput analysis of multiple-access-relay channel based on rateless coding 基于无速率编码的多址中继信道吞吐量分析
2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734039
Parisa Mansourifard, M. Nasiri-Kenari
{"title":"Throughput analysis of multiple-access-relay channel based on rateless coding","authors":"Parisa Mansourifard, M. Nasiri-Kenari","doi":"10.1109/ISTEL.2010.5734039","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734039","url":null,"abstract":"In this paper, we consider a new scheme based on jointly network and rateless coding for a multiple-access relay channel. In the scheme, whenever the relay can decode multiple messages of the users, it jointly encodes them using a larger rateless code. This scheme is compared with direct transmission and the conventional relaying scheme in which the relay helps each user independently at orthogonal channels. The comparison is made by evaluating the throughput of different schemes. The analytical and the simulation results show that the proposed scheme outperforms the other ones at the cases considered.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126026010","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
Learning novel object parts model for object categorization 学习新的对象部件模型用于对象分类
2010 5th International Symposium on Telecommunications Pub Date : 2010-12-01 DOI: 10.1109/ISTEL.2010.5734131
Sima Soltanpour, H. Ebrahimnezhad
{"title":"Learning novel object parts model for object categorization","authors":"Sima Soltanpour, H. Ebrahimnezhad","doi":"10.1109/ISTEL.2010.5734131","DOIUrl":"https://doi.org/10.1109/ISTEL.2010.5734131","url":null,"abstract":"We present a new method to learn the model based on object parts extraction and grammar which can be applied to classification and recognition. Our approach is invariant to the scale and rotation of the objects. We use Structural Context feature to detect object parts. It is done comparing SC histograms of the model and image. We extract oriented triplets from centers of detected parts. We define grammar for these parts using normalize distances and angles between them. We propose and compare two alternative implementations using different classifiers: Hidden Markov Model with mixture of Gaussian outputs (MHMM) and Adaptive Neuro-Fuzzy Inference system (ANFIS) to learn this grammar and estimate parameters of the model for each object class. The proposed method is computationally efficient and it is invariant to scale and rotation. Experimental results demonstrate the privileged performance of the proposed approach against other methods.","PeriodicalId":306663,"journal":{"name":"2010 5th International Symposium on Telecommunications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122813937","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
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