2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel最新文献_第8页

Coexistence Performance Enhancement Techniques for DRP Based WLAN/WPAN and Cellular Radios Collocated in a Mobile Device 基于DRP的WLAN/WPAN和蜂窝无线电共存性能增强技术在移动设备中的配置

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel Pub Date : 2006-11-01 DOI: 10.1109/EEEI.2006.321100

O. Friedman, Yossi Tsfati, Ran Katz, Nir Tal, O. Eliezer

引用次数: 3

Point to Multipoint Channel Estimation by "Abuse" of Receivers 接收机“滥用”的点到多点信道估计

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel Pub Date : 2006-11-01 DOI: 10.1109/EEEI.2006.321131

I. Ilani

{"title":"Point to Multipoint Channel Estimation by \"Abuse\" of Receivers","authors":"I. Ilani","doi":"10.1109/EEEI.2006.321131","DOIUrl":"https://doi.org/10.1109/EEEI.2006.321131","url":null,"abstract":"With increasing bandwidths and decreasing loop lengths, crosstalk becomes the main impairment in VDSL systems. For downstream communication, crosstalk precompensation techniques have been designed to cope with this issue by using the collocation of the transmitters. These techniques naturally need an accurate estimation of the crosstalk channel responses. This paper investigates the issue of estimating and tracking these channels. It was previously thought that efficient estimation schemes must use some part of the upstream or downstream bit rates. Moreover, it was assumed that the training signals and their duration must be coordinated between the collocated transmitters and the receivers. In this paper, a new algorithm is presented that practically needs no real-time coordination between the transmitters and the receivers and only needs a very narrow-band control channel between the transmitters and the receivers. The principle is to define two different types of precoding matrices, namely estimation precoding matrices (EPM) for estimation and tracking and cancellation precoding matrices (CPM) for the actual FEXT precompensation. During the estimation period the information symbols are modulated by the estimation precoding matrices, which cause the transmitted symbols to be slightly distorted. These distorted signals \"abuse\" the adaptive filters at the receivers, and cause the filters to converge to parameters that are functions of the crosstalk channel responses. The proposed estimation algorithm allows upgrading of SISO VDSL systems into FEXT cancelled systems by upgrading the transmitters alone without replacing the existing receivers.","PeriodicalId":142814,"journal":{"name":"2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132504691","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

An Algorithm for Accurate Breath Detection in Speech and Song Signals 语音和歌曲信号中准确呼吸检测算法

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel Pub Date : 2006-11-01 DOI: 10.1109/EEEI.2006.321091

D. Ruinskiy, Yizhar Lavner

{"title":"An Algorithm for Accurate Breath Detection in Speech and Song Signals","authors":"D. Ruinskiy, Yizhar Lavner","doi":"10.1109/EEEI.2006.321091","DOIUrl":"https://doi.org/10.1109/EEEI.2006.321091","url":null,"abstract":"Automatic and reliable detection of pre-defined events in speech and audio signals is of great importance in many applications, and has been the subject of extensive research in recent years. One such application is in professional voice recordings, where the recorded signal may contain unwanted sounds or effects, and an automatic tool that could detect and manipulate these sounds is highly desirable. In this study we present an effective algorithm for detection of breath sounds in speech or song signals, in order to improve the aesthetics of the recorded voice. The algorithm works by creating a template feature matrix from the mel-frequency cepstral characteristics of several breath examples, and comparing it to feature matrices of consecutive frames of the audio signal, using an adaptive distance threshold, marking each frame as breathy or non-breathy. The initial detection is later refined by an edge detection algorithm, based on various waveform parameters, designed to demarcate the exact boundaries of each breath event and to eliminate possible false detections. Evaluation of the algorithm on a database of speech and songs containing several hundred breath sounds yielded a correct identification rate of 94%, with a specificity of 96%.","PeriodicalId":142814,"journal":{"name":"2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133617881","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

External Lightning Protection-Israeli Standard and Code of Practice 外部防雷-以色列标准和实务守则

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel Pub Date : 2006-11-01 DOI: 10.1109/EEEI.2006.321082

A. Braunstein, D. Berla, Y. Beck

引用次数: 0

RF Photonics - Why Should Defense Take Notice? 射频光子学——为什么国防要注意?

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel Pub Date : 2006-11-01 DOI: 10.1109/EEEI.2006.321121

S. Zach, L. Singer

引用次数: 2

Ultrasonic coupling of electrically isolated circuits using piezoelectric devices 使用压电装置的电隔离电路的超声耦合

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel Pub Date : 2006-11-01 DOI: 10.1109/EEEI.2006.321061

D. Mets, S. Ozeri, D. Shmilovitz

{"title":"Ultrasonic coupling of electrically isolated circuits using piezoelectric devices","authors":"D. Mets, S. Ozeri, D. Shmilovitz","doi":"10.1109/EEEI.2006.321061","DOIUrl":"https://doi.org/10.1109/EEEI.2006.321061","url":null,"abstract":"Ceramic materials with enhanced piezoelectric characteristics became widely available in recent years, which have led to an ever-increasing employment of these devices in various applications such as: sensing, energy harvesting and ultrasonic transducers, among others. This paper describes an acoustic link on an electronic circuit's PCB that offers isolation and high immunity from EMI. This type of coupling may be adapted to such applications as isolated switched-mode power supplies, high voltage current probes and data transfer. A further application might be the acoustic coupling of electrically isolated circuits. A recent research article reported an attempt to use acoustic transfer for electrical isolation incorporating devices designed specifically for the media through which the acoustic wave propagates i.e. piezoelectric transformer. However, they observed notable limitations such as a low common mode rejection ratio (CMRR) and a relatively narrow bandwidth [1]. In the current research, several system configurations with high CMRR, low voltage input and wide bandwidth were analyzed and their relative efficiencies evaluated. A signal was transmitted through conventional PCBs(FR4) with different thicknesses using piezoelectric devices. FM modulation proved quite effective for this purpose. The study includes: an analysis of the electromechanical processes involved as well as a model of the system, simulation results, and a comparison of the resulting bandwidth for different modes and materials. We also optimized a design for a relevant practical application ¿ a switched mode power supply feedback signal coupling. The simulation was carried out using PSPICE.","PeriodicalId":142814,"journal":{"name":"2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114788635","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

Estimation of the Water Content in High Voltage Oil-impregnated Transformer Insulation 高压油浸变压器绝缘含水率的估算

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel Pub Date : 2006-11-01 DOI: 10.1109/EEEI.2006.321103

A. Shkolnik

引用次数: 2

Distribution Generation Case Study: Electric Wind Farm with Doubly Fed Induction Generators 配电发电案例研究:双馈感应发电机的风力发电场

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel Pub Date : 2006-11-01 DOI: 10.1109/EEEI.2006.321118

Shai Towito, M. Berman, G. Yehuda, R. Rabinovici

{"title":"Distribution Generation Case Study: Electric Wind Farm with Doubly Fed Induction Generators","authors":"Shai Towito, M. Berman, G. Yehuda, R. Rabinovici","doi":"10.1109/EEEI.2006.321118","DOIUrl":"https://doi.org/10.1109/EEEI.2006.321118","url":null,"abstract":"The paper presents simulation results regarding the operation of an electric generation wind farm connected to the grid. A load is also connected at the middle of the power line that joins the grid to the wind farm. The wind farm is equipped with Doubly Fed Induction Generators (DFIG). Two configurations, grid and load alone, and grid, load, and the wind farm, were simulated at different conditions, such as wind speed close to zero, nominal wind speed, load close to zero, and nominal load. The DFIG could operate as a rotating capacitor, similar to a synchronous machine. Therefore, there are no capacitor banks operating with the wind farm. The steady state voltage profile and active power losses could be obtained. Furthermore, voltage stability (PV or nose characteristics) and transient stability (three-phase symmetrical short circuit and one phase-to-ground short circuit) are studied. It is seen that the distributed generation could increase the voltage stability. Moreover, the DFIG rotor voltages control could change the reactive power the DFIG takes or supplies to the grid. The rotor converter dc voltage would affect the reactive power flow toward the DFIG, similar to the under- or over-excitation effects present in a synchronous machine.","PeriodicalId":142814,"journal":{"name":"2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122336219","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: 10

Induction Motor Tradeoff for VSD Driven Pumps and Fans VSD驱动泵和风扇的感应电机权衡

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel Pub Date : 2006-11-01 DOI: 10.1109/EEEI.2006.321069

Teddy Nickolayevsky, S. Singer

引用次数: 1

On channel capacity of OFDM with SLM method for PAPR reduction 用SLM方法降低PAPR的OFDM信道容量研究

2006 IEEE 24th Convention of Electrical & Electronics Engineers in Israel Pub Date : 2006-11-01 DOI: 10.1109/EEEI.2006.321129

Yaron Handali, Itamar Nizan, D. Wulich

引用次数: 13