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2013 21st Iranian Conference on Electrical Engineering (ICEE)最新文献

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The effect of polarization in shape reconstruction of two-dimensional penetrable and non-penetrable objects using linear sampling method 偏振对线性采样法二维可穿透和不可穿透物体形状重建的影响
2013 21st Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2013-05-14 DOI: 10.1109/IRANIANCEE.2013.6599809
Mehdi Salar Kaleji, Mohammad Zoofaghari, R. Safian
{"title":"The effect of polarization in shape reconstruction of two-dimensional penetrable and non-penetrable objects using linear sampling method","authors":"Mehdi Salar Kaleji, Mohammad Zoofaghari, R. Safian","doi":"10.1109/IRANIANCEE.2013.6599809","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599809","url":null,"abstract":"Linear sampling method (LSM) is a simple and effective method for reconstruction of unknown objects shape. It is also a fast and reliable method for finding the location of an object. This method is based on far field operator which relates the far field radiation to its associated line source in the object. There has been an extensive research on different aspects of the method. But from the experimental point of view there has been little research especially on the effect of polarization on the imaging quality of the method. In this paper, we study the effect of polarization on the quality of shape reconstruction in two dimensional targets. Examples comparing two different types of polarizations Transverse Electric (TE) and Transverse Magnetic (TM) on reconstruction quality of penetrable and non-penetrable objects is provided.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"4 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131437062","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
A new hybrid decoding algorithm for LDPC codes based on the improved variable multi weighted bit-flipping and BP algorithms 一种基于改进的可变多加权比特翻转和BP算法的LDPC码混合译码算法
2013 21st Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2013-05-14 DOI: 10.1109/IRANIANCEE.2013.6599566
Ehsan Olyaei Torshizi, Hossein Sharifi, M. Seyrafi
{"title":"A new hybrid decoding algorithm for LDPC codes based on the improved variable multi weighted bit-flipping and BP algorithms","authors":"Ehsan Olyaei Torshizi, Hossein Sharifi, M. Seyrafi","doi":"10.1109/IRANIANCEE.2013.6599566","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599566","url":null,"abstract":"In this paper, a new two-stage hybrid algorithm for decoding Low-Density Parity-Check (LDPC) codes is proposed that incorporates two iterative decoding. For the first stage of decoding, we offer a new decoding algorithm called Improved Variable Multi Weighted Bit-Flipping (IVMWBF) algorithm. Since the IVMWBF algorithm is based on the idea of flipping variable multi bits in each iteration, both improvement in performance and reduction in iteration number and computational complexity are observed in this algorithm. The proposed hybrid algorithm which is a combination of the IVMWBF and BP algorithms, while having a performance exactly similar to that of the BP algorithm, has less complexity compared to that algorithm.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132931472","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
A wide-range programmable duty cycle corrector (DCC) 宽范围可编程占空比校正器(DCC)
2013 21st Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2013-05-14 DOI: 10.1109/IRANIANCEE.2013.6599655
Hadiseh Babazadeh, Arash Esmaili, K. Hadidi, A. Khoei
{"title":"A wide-range programmable duty cycle corrector (DCC)","authors":"Hadiseh Babazadeh, Arash Esmaili, K. Hadidi, A. Khoei","doi":"10.1109/IRANIANCEE.2013.6599655","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599655","url":null,"abstract":"A very simple, wide range and programmable duty cycle corrector (DCC) is presented. SPICE simulation results show that the frequency range of the input signal is 250MHz to 1.6GHz, the duty cycle range of the input signal is from 30% to 70% and the programmable duty cycle of the output signal is from 30% to 70% in steps of 10%. The power consumption and p-p jitter are 4.9mW and 2.5ps at 1.6 GHz respectively. This circuit is simulated in 0.35um CMOS technology.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134450825","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
New structure for multilevel inverters with the reduced number of switches 减少开关数量的多电平逆变器的新结构
2013 21st Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2013-05-14 DOI: 10.1109/IRANIANCEE.2013.6882274
N. Rashidirad, E. Afjei, A. Jalali
{"title":"New structure for multilevel inverters with the reduced number of switches","authors":"N. Rashidirad, E. Afjei, A. Jalali","doi":"10.1109/IRANIANCEE.2013.6882274","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6882274","url":null,"abstract":"In this paper a new structure for a multilevel inverter has been proposed which its operation is based on a combination of diode-clamped and two level full bridge inverters. Major advantage of the proposed topology is reduction in the number of switches compared to the conventional topologies. Since increasing the number of levels, may lead to probably problems in diode clamped section of the topology, a solution has been also presented.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"7 Suppl 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133373015","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
Improving efficiency in resource allocation of OFDMA femtocell networks 提高OFDMA移动蜂窝网络的资源分配效率
2013 21st Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2013-05-14 DOI: 10.1109/IRANIANCEE.2013.6599557
Keyvan Aghababaiyan, Mohammadreza Pakravan
{"title":"Improving efficiency in resource allocation of OFDMA femtocell networks","authors":"Keyvan Aghababaiyan, Mohammadreza Pakravan","doi":"10.1109/IRANIANCEE.2013.6599557","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599557","url":null,"abstract":"Interference control is one of the fundamental challenges in resource allocation of femtocell networks that use orthogonal frequency-division multiple access (OFDMA). In this paper, a method is proposed that reduces the interference between femtocells. This method is implemented by the femtocells in a self organizing manner and increases frequency reuse factor. Thus, the network throughput will increase and the fairness between femtocells remains reasonable we also propose a mechanism that can be applied increase the frequency resources assigned to each femtocell. These new frequencies can be used when femtocells require more frequency resources to carry higher traffic loads. Results of simulations show the improvement of the first method compared to the previous methods. It is also demonstrated that by applying the second mechanism in a high-load condition of the network, a considerable improvement is observed in its throughput. (Between 20-120% improvements).","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134112376","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 approach for human detection in images using histograms of oriented gradients 基于方向梯度直方图的图像中人检测新方法
2013 21st Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2013-05-14 DOI: 10.1109/IRANIANCEE.2013.6599619
Narges Ghaedi Bardeh, M. Palhang
{"title":"New approach for human detection in images using histograms of oriented gradients","authors":"Narges Ghaedi Bardeh, M. Palhang","doi":"10.1109/IRANIANCEE.2013.6599619","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599619","url":null,"abstract":"Histograms of Oriented Gradients (HoG) is one of the most used descriptors in human detection. Although it has good performance compared to other descriptors in the area, if the size and number of images increase, the dimension of the descriptor vectors would become extremely large and therefore makes the training process computationally complex. To overcome this, in this paper a human detection method based on bag-of-features model is represented. Visual words are patches of pictures described with HoG and then clustered using K-means algorithm. To highlight the most important visual words, a weighting method could be applied to the descriptor vectors. Here we used Term Frequency-Inverse Document Frequency (Tf_Idf) which has been used in document classification. In the proposed approach, Support Vector Machine (SVM) is used as the binary classifier. We applied our proposed method to the MIT and INRIA datasets and compared the performance of our algorithm with a similar method in the literature. The results of our experiments show that our method performs at least as well as other available methods.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114517557","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: 13
Synthesis of parallel hierarchical finite state machines 并行层次有限状态机的综合
2013 21st Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2013-05-14 DOI: 10.1109/IRANIANCEE.2013.6599683
V. Sklyarov, I. Skliarova
{"title":"Synthesis of parallel hierarchical finite state machines","authors":"V. Sklyarov, I. Skliarova","doi":"10.1109/IRANIANCEE.2013.6599683","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599683","url":null,"abstract":"This paper presents a novel model and method for synthesis of parallel hierarchical finite state machines (PHFSM) that permit to implement such algorithms, which are: 1) composed of modules; 2) the modules can be activated from other modules; 3) more than one module can be activated in parallel. The synthesis involves three basic steps: 1) conversion of a given specification to special state transition diagrams; 2) use of the proposed hardware description language templates; 3) synthesis of the circuit from the templates. The results of experiments have proven the effectiveness and practicability of the proposed technique.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114676573","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: 11
Multi-sensor optimal information fusion Kalman filter with mobile agents in ring sensor networks 环形传感器网络中带移动代理的多传感器最优信息融合卡尔曼滤波
2013 21st Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2013-05-14 DOI: 10.1109/IRANIANCEE.2013.6599857
B. Safarinejadian, Kazem Hasanpoor
{"title":"Multi-sensor optimal information fusion Kalman filter with mobile agents in ring sensor networks","authors":"B. Safarinejadian, Kazem Hasanpoor","doi":"10.1109/IRANIANCEE.2013.6599857","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599857","url":null,"abstract":"In this paper, two mobile agent based distributed Kalman filter algorithms are proposed for optimal information fusion in sensor networks. In the proposed methods, mobile agents (MAs) play an important and fundamental role in information fusion. A mobile agent travels among the sensors and collects the necessary information. The collected information is carried to a fusion centre in which the optimal state estimates are computed. Finally, the proposed methods are applied on a radar tracking system with five sensors arranged in two rings with some faulty sensors. Performance of the proposed methods will be compared with the centralized Kalman filter.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117117031","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
Homo- and hetero-epitaxial growth of InSb and AlxIn1−xSb layers by molecular beam epitaxy 分子束外延生长InSb和AlxIn1−xSb层的异质外延生长
2013 21st Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2013-05-14 DOI: 10.1109/IRANIANCEE.2013.6599533
M. Mohammadkhani, S. Mirzakuchaki, Seyyed Ahmad Mohades Kassai
{"title":"Homo- and hetero-epitaxial growth of InSb and AlxIn1−xSb layers by molecular beam epitaxy","authors":"M. Mohammadkhani, S. Mirzakuchaki, Seyyed Ahmad Mohades Kassai","doi":"10.1109/IRANIANCEE.2013.6599533","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599533","url":null,"abstract":"AlxIn1-xSb and InSb layers have been grown by molecular beam epitaxy (MBE) on GaAs and InSb substrates with various orientations. Reflection high-energy electron diffraction (RHEED) was used for in-situ monitoring of crystalline quality during growth. Quality and surface morphology of the grown layers was assessed by x-ray diffractometry (XRD), field emmission scanning electron microscopy (FE-SEM) and atomic force microscopy (AFM). Homoepitaxial InSb layers were grown on (111)A and (111)B InSb subtrates and photodiodes were fabricated by growing thin p-AlxIn1-xSb barriers between n-InSb and p-InSb layers. Heteroepitaxial InSb layers were grown on semi-insulating (001) GaAs substrates without using any buffer layer. This buffer-free growth procedure speeds up the production process and eliminates the unwanted impurities at the expense of slight degradation of crystalline quality.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116275559","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
An adaptive linear neural network for identification of oscillatory damped signals 一种用于振动阻尼信号辨识的自适应线性神经网络
2013 21st Iranian Conference on Electrical Engineering (ICEE) Pub Date : 2013-05-14 DOI: 10.1109/IRANIANCEE.2013.6599686
Z. Nouri-Sedeh, M. Mojiri, M. Zekri
{"title":"An adaptive linear neural network for identification of oscillatory damped signals","authors":"Z. Nouri-Sedeh, M. Mojiri, M. Zekri","doi":"10.1109/IRANIANCEE.2013.6599686","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2013.6599686","url":null,"abstract":"This paper presents an algorithm based on adaptive linear neural network for online estimation of damping factor and frequency of a complex exponentially damped sinusoidal signal. The unknown parameters of signal put in the single weight of a neural network. Normalized least mean square algorithm in complex form is applied to train this single weight. A variable step size is proposed to enhance the accuracy and convergence speed of the proposed method. Convergence analysis of the proposed method is presented. Simulations results confirm the analytical derivations and desirable performance of the proposed method.","PeriodicalId":383315,"journal":{"name":"2013 21st Iranian Conference on Electrical Engineering (ICEE)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123185496","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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