2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)最新文献_第8页

Low-Complexity Precoder for Massive MIMO Systems Based on Gram-Schmidt Conjugate Direction Method 基于Gram-Schmidt共轭方向法的大规模MIMO系统低复杂度预编码器

2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM) Pub Date : 2018-10-01 DOI: 10.1109/ETCM.2018.8580269

J. Minango, A. Flores, Pablo Minango, D. Ibarra

{"title":"Low-Complexity Precoder for Massive MIMO Systems Based on Gram-Schmidt Conjugate Direction Method","authors":"J. Minango, A. Flores, Pablo Minango, D. Ibarra","doi":"10.1109/ETCM.2018.8580269","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580269","url":null,"abstract":"In massive multiple-input multiple-output (MIMO) systems, when the number of base station (BS) antennas is much higher than the number of users. Linear zero-forcing (ZF) precoder is able to achieve the near-optimal capacity performance, once the massive MIMO channel matrix presents the property of asymptotic orthogonality. However, ZF precoder involves large matrix inversion with high complexity, especially when the number of users increases. In this paper, in order to avoid the habitual matrix inversion, we propose a novel low-complexity near-optimal precoder based on the Gram-Schmidt conjugate direction (GSCD) iterative method, which reduces the complexity from O(K3) to O(K2), where K is the number of users. Besides, a simple approach to determine the convergence rate achieved by GSCD-based precoder is obtained by exploiting the massive MIMO channel property of asymptotic orthogonality, which reveals that the proposed precoder converges faster with the increasing number of BS antennas. Numerical results reveal that GSCD-based precoder achieves the near-optimal capacity of the ZF precoder with a reduced number of iterations.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134139601","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

Non-linear PID and Dynamic SMC for the Artificial Pancreas control in the treatment of Type 1 Diabetes 非线性PID和动态SMC用于1型糖尿病人工胰腺控制

2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM) Pub Date : 2018-10-01 DOI: 10.1109/ETCM.2018.8580340

Dayan Calupiña, Andrea García, O. Camacho, A. Rosales, P. Rivadeneira

引用次数: 2

Renewable Energy Source P-V conected to the grid through Shunt Active Power Filter based in P-Q theory 可再生能源P-V通过基于P-Q理论的并联有源电力滤波器接入电网

2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM) Pub Date : 2018-10-01 DOI: 10.1109/ETCM.2018.8580274

Tuesman D. Castillo, J. R. Castro

引用次数: 5

MQTT Protocol of IoT for Real Time Bilateral Teleoperation Applied to Car-Like Mobile Robot 面向实时双向遥操作的物联网MQTT协议在类车移动机器人中的应用

2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM) Pub Date : 2018-10-01 DOI: 10.1109/ETCM.2018.8580299

Freddy Panchi, Karla Hernández, D. Chávez

引用次数: 3

How intelligent is the SmartGrid in Ecuador? 厄瓜多尔的智能电网有多智能?

2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM) Pub Date : 2018-10-01 DOI: 10.1109/ETCM.2018.8580316

Galo Enrique Valverde Landívar, Joffre Luis León Veas

{"title":"How intelligent is the SmartGrid in Ecuador?","authors":"Galo Enrique Valverde Landívar, Joffre Luis León Veas","doi":"10.1109/ETCM.2018.8580316","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580316","url":null,"abstract":"Electricity is an essential component in modern life and the economy, it has promoted the development of so-called industrial era over an extended period of time, and actual information era; however organisms such as WEC1, WWAP2 and ONU SDG3 consider the automation of the current power system model as an unsustainable energy system model for the 21st century because renewable energy sources alone will not be sufficient to meet the large increase of the energy demand and fulfill it in 2030. We are in the knowledge era, and it has said that “artificial intelligence is the new electricity” [1]. This sets enormous challenges for implementation of a new model for the infrastructure, the acquisition and use of the smart electricity grid (Smart Grid) in Ecuador where power is required to be affordable, reliable and sustainable. It describes the current situation, and presents the status of implementation of this concept, to then be able to structure the foundations of a model based on artificial intelligence, with participation of each one of its actors, presenting the opportunity to carry the electricity power sector and the Ecuadorian society, a new era of development, sustainability, energy independence, efficiency and high availability.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125229042","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 Virtual Listener For HRTF-Based Sound Source Localization Using Support Vector Regression 基于支持向量回归的hrtf声源定位虚拟监听器

2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM) Pub Date : 2018-10-01 DOI: 10.1109/ETCM.2018.8580297

Felipe Grijalva, J. Larco, Paúl Mejía

{"title":"A Virtual Listener For HRTF-Based Sound Source Localization Using Support Vector Regression","authors":"Felipe Grijalva, J. Larco, Paúl Mejía","doi":"10.1109/ETCM.2018.8580297","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580297","url":null,"abstract":"In perceptual-based techniques for individualization of head-related transfer functions (HRTFs), subjects tune some parameters for several target directions until they achieve an acceptable spatial accuracy. However, this procedure might be time-consuming depending on the ability of the listener, and the number of parameters and target directions. This makes desirable a way to estimate empirically the localization accuracy before tuning sessions. To tackle this problem, we propose a virtual listener based on Support Vector Regression (SVR) to substitute the human listener in such sessions. We show that, using a small training set obtained by sampling uniformly a subject’s HRTFs across directions, our virtual listener achieves human-level localization accuracy. Moreover, simulations show that the virtual listener performance is in accordance with human perception for sound sources with different frequency content as well as sound sources filtered through non-individualized HRTFs. Finally, our approach based on SVR attains performance similar to computationally intensive methods based on Gaussian Process Regression.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116643943","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

Telerehabilitation Platform for Post-arthroplasty Recovery: a Dynamic Time Warping Approach 关节置换术后远程康复平台:一种动态时间扭曲方法

2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM) Pub Date : 2018-10-01 DOI: 10.1109/ETCM.2018.8580323

Y. Rybarczyk, Louis Leconte, J. P. Medina, Karina Jimenes, Patricia Acosta-Vargas, Danilo Esparza

引用次数: 4

Computer Vision Methods in the Process of Fermentation of the Cocoa Bean 可可豆发酵过程中的计算机视觉方法

2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM) Pub Date : 2018-10-01 DOI: 10.1109/ETCM.2018.8580345

Pablo Parra, T. Negrete, Jorge Llaguno, N. Vega

引用次数: 2

Development of a low cost mobile system for monitoring cardiac activity based on noncontact electrodes 基于非接触电极的低成本心脏活动监测移动系统的开发

2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM) Pub Date : 2018-10-01 DOI: 10.1109/ETCM.2018.8580304

Andrés V. Guatapi G., Carmen A. Carabali C., Alvarez R. Robin

{"title":"Development of a low cost mobile system for monitoring cardiac activity based on noncontact electrodes","authors":"Andrés V. Guatapi G., Carmen A. Carabali C., Alvarez R. Robin","doi":"10.1109/ETCM.2018.8580304","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580304","url":null,"abstract":"Here we present the design, implementation and testing of a mobile system for ambulatory monitoring of cardiac activity, it uses capacitive electrodes that do not need of direct contact with the skin. The system uses the material between the skin and the electrodes as a dielectric for the capacitor formed between them. The device pretends to monitor heart activity in people with high skin sensitivity or with injuries, it could also be used as part of the attire of professionals such as pilots. Our hypotheses were the following: 1) It is possible to develop a system that allows monitoring heart activity through a mobile device, without the need conductor gel or even in direct contact to the skin. 2) The implemented electrodes will be able to take data with and without direct contact with the skin. 3) The system will be able to get electrocardiographic signal through at least three different type of textures. All the hypotheses were satisfied. The performance of the system was evaluated by acquiring measurements, using different textures as dielectric and then performing a paired t-test comparing them with a signal of wet Ag/Cl electrodes that are considered the gold standard now, the results suggested that there is not significative difference between the signals taken with the implemented electrodes and the ones taken with the Ag/Cl electrodes. Connectivity and performance of the App were also tested by using it and obtaining satisfactory results.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127558885","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

Nonlinear Chemical Processes With Variable Dead Time: Comparative Robustness and Performance Analysis for Model Based Predictive Schemes 变死区非线性化学过程:基于模型的预测方案的鲁棒性和性能分析

2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM) Pub Date : 2018-10-01 DOI: 10.1109/ETCM.2018.8580271

M. Campoverde, Raisa M. Guayasamín, O. Camacho, P. Leica

引用次数: 1